Yichun Zhao JAVA Notes

Friday, 3 July 2020

How SpringBoot Auto-Configure works?

The Spring auto-configuration depends on two annotations, i.e. @EnableAutoConfiguration and @Conditional.

@EnableAutoConfiguration is already included in the @SpringBootApplication. So for a boot application, some beans can be auto-configured as it starts up.

The magic is hidden within the jar file, i.e. spring-boot-autoconfigure. If the spring-boot-starter is included in the POM, you will see it among the dependencies.

The auto-configuration is carried out in a line of pre-defined java bean configurations.

Magic depends on two principles: when finding a class within the classpath; or when missing a class within the classpath.

That all about auto-configure magic come from.

For the case in the following screen dump. Once the class ObjectMapper is found in the classpath, then the JacksonAutoConfiguration will be generated and the bean factory will produce those beans having been required.

In the application.properties file, you may set up, debug = true.

Afterwards, when starting up the spring boot application, an auto-configuration report will be generated.

============================

CONDITIONS EVALUATION REPORT

============================

Positive matches:

-----------------

AopAutoConfiguration matched:

- @ConditionalOnProperty (spring.aop.auto=true) matched (OnPropertyCondition)

AopAutoConfiguration.AspectJAutoProxyingConfiguration matched:

- @ConditionalOnClass found required class 'org.aspectj.weaver.Advice' (OnClassCondition)

AopAutoConfiguration.AspectJAutoProxyingConfiguration.CglibAutoProxyConfiguration matched:

- @ConditionalOnProperty (spring.aop.proxy-target-class=true) matched (OnPropertyCondition)

DataSourceAutoConfiguration matched:

- @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType' (OnClassCondition)

- @ConditionalOnMissingBean (types: io.r2dbc.spi.ConnectionFactory; SearchStrategy: all) did not find any beans (OnBeanCondition)

DataSourceAutoConfiguration.PooledDataSourceConfiguration matched:

- AnyNestedCondition 1 matched 1 did not; NestedCondition on DataSourceAutoConfiguration.PooledDataSourceCondition.PooledDataSourceAvailable PooledDataSource found supported DataSource; NestedCondition on DataSourceAutoConfiguration.PooledDataSourceCondition.ExplicitType @ConditionalOnProperty (spring.datasource.type) did not find property 'type' (DataSourceAutoConfiguration.PooledDataSourceCondition)

- @ConditionalOnMissingBean (types: javax.sql.DataSource,javax.sql.XADataSource; SearchStrategy: all) did not find any beans (OnBeanCondition)

DataSourceConfiguration.Hikari matched:

- @ConditionalOnClass found required class 'com.zaxxer.hikari.HikariDataSource' (OnClassCondition)

- @ConditionalOnProperty (spring.datasource.type=com.zaxxer.hikari.HikariDataSource) matched (OnPropertyCondition)

- @ConditionalOnMissingBean (types: javax.sql.DataSource; SearchStrategy: all) did not find any beans (OnBeanCondition)

DataSourceJmxConfiguration matched:

- @ConditionalOnProperty (spring.jmx.enabled=true) matched (OnPropertyCondition)

DataSourceJmxConfiguration.Hikari matched:

- @ConditionalOnClass found required class 'com.zaxxer.hikari.HikariDataSource' (OnClassCondition)

- @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) found a primary bean from beans 'dataSource' (OnBeanCondition)

DataSourcePoolMetadataProvidersConfiguration.HikariPoolDataSourceMetadataProviderConfiguration matched:

- @ConditionalOnClass found required class 'com.zaxxer.hikari.HikariDataSource' (OnClassCondition)

DataSourceTransactionManagerAutoConfiguration matched:

- @ConditionalOnClass found required classes 'org.springframework.jdbc.core.JdbcTemplate', 'org.springframework.transaction.PlatformTransactionManager' (OnClassCondition)

DataSourceTransactionManagerAutoConfiguration.DataSourceTransactionManagerConfiguration matched:

- @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) found a primary bean from beans 'dataSource' (OnBeanCondition)

DevToolsDataSourceAutoConfiguration matched:

- Devtools devtools enabled. (OnEnabledDevToolsCondition)

- DevTools DataSource Condition found auto-configured DataSource (DevToolsDataSourceAutoConfiguration.DevToolsDataSourceCondition)

DevToolsDataSourceAutoConfiguration.DatabaseShutdownExecutorEntityManagerFactoryDependsOnPostProcessor matched:

- @ConditionalOnClass found required class 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

- @ConditionalOnBean (types: org.springframework.orm.jpa.AbstractEntityManagerFactoryBean; SearchStrategy: all) found bean '&entityManagerFactory' (OnBeanCondition)

DispatcherServletAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.web.servlet.DispatcherServlet' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

DispatcherServletAutoConfiguration.DispatcherServletConfiguration matched:

- @ConditionalOnClass found required class 'javax.servlet.ServletRegistration' (OnClassCondition)

- Default DispatcherServlet did not find dispatcher servlet beans (DispatcherServletAutoConfiguration.DefaultDispatcherServletCondition)

DispatcherServletAutoConfiguration.DispatcherServletRegistrationConfiguration matched:

- @ConditionalOnClass found required class 'javax.servlet.ServletRegistration' (OnClassCondition)

- DispatcherServlet Registration did not find servlet registration bean (DispatcherServletAutoConfiguration.DispatcherServletRegistrationCondition)

DispatcherServletAutoConfiguration.DispatcherServletRegistrationConfiguration#dispatcherServletRegistration matched:

- @ConditionalOnBean (names: dispatcherServlet types: org.springframework.web.servlet.DispatcherServlet; SearchStrategy: all) found bean 'dispatcherServlet' (OnBeanCondition)

EmbeddedWebServerFactoryCustomizerAutoConfiguration matched:

- @ConditionalOnWebApplication (required) found 'session' scope (OnWebApplicationCondition)

EmbeddedWebServerFactoryCustomizerAutoConfiguration.TomcatWebServerFactoryCustomizerConfiguration matched:

- @ConditionalOnClass found required classes 'org.apache.catalina.startup.Tomcat', 'org.apache.coyote.UpgradeProtocol' (OnClassCondition)

ErrorMvcAutoConfiguration matched:

- @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.springframework.web.servlet.DispatcherServlet' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

ErrorMvcAutoConfiguration#basicErrorController matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.web.servlet.error.ErrorController; SearchStrategy: current) did not find any beans (OnBeanCondition)

ErrorMvcAutoConfiguration#errorAttributes matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.web.servlet.error.ErrorAttributes; SearchStrategy: current) did not find any beans (OnBeanCondition)

ErrorMvcAutoConfiguration.DefaultErrorViewResolverConfiguration#conventionErrorViewResolver matched:

- @ConditionalOnBean (types: org.springframework.web.servlet.DispatcherServlet; SearchStrategy: all) found bean 'dispatcherServlet'; @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.web.servlet.error.ErrorViewResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

ErrorMvcAutoConfiguration.WhitelabelErrorViewConfiguration matched:

- @ConditionalOnProperty (server.error.whitelabel.enabled) matched (OnPropertyCondition)

- ErrorTemplate Missing did not find error template view (ErrorMvcAutoConfiguration.ErrorTemplateMissingCondition)

ErrorMvcAutoConfiguration.WhitelabelErrorViewConfiguration#beanNameViewResolver matched:

- @ConditionalOnMissingBean (types: org.springframework.web.servlet.view.BeanNameViewResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

ErrorMvcAutoConfiguration.WhitelabelErrorViewConfiguration#defaultErrorView matched:

- @ConditionalOnMissingBean (names: error; SearchStrategy: all) did not find any beans (OnBeanCondition)

GenericCacheConfiguration matched:

- Cache org.springframework.boot.autoconfigure.cache.GenericCacheConfiguration automatic cache type (CacheCondition)

H2ConsoleAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.h2.server.web.WebServlet' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

- @ConditionalOnProperty (spring.h2.console.enabled=true) matched (OnPropertyCondition)

HibernateJpaAutoConfiguration matched:

- @ConditionalOnClass found required classes 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean', 'javax.persistence.EntityManager', 'org.hibernate.engine.spi.SessionImplementor' (OnClassCondition)

HibernateJpaConfiguration matched:

- @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) found a primary bean from beans 'dataSource' (OnBeanCondition)

HttpEncodingAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.web.filter.CharacterEncodingFilter' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

- @ConditionalOnProperty (server.servlet.encoding.enabled) matched (OnPropertyCondition)

HttpEncodingAutoConfiguration#characterEncodingFilter matched:

- @ConditionalOnMissingBean (types: org.springframework.web.filter.CharacterEncodingFilter; SearchStrategy: all) did not find any beans (OnBeanCondition)

HttpMessageConvertersAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.http.converter.HttpMessageConverter' (OnClassCondition)

- NoneNestedConditions 0 matched 1 did not; NestedCondition on HttpMessageConvertersAutoConfiguration.NotReactiveWebApplicationCondition.ReactiveWebApplication did not find reactive web application classes (HttpMessageConvertersAutoConfiguration.NotReactiveWebApplicationCondition)

HttpMessageConvertersAutoConfiguration#messageConverters matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.http.HttpMessageConverters; SearchStrategy: all) did not find any beans (OnBeanCondition)

HttpMessageConvertersAutoConfiguration.StringHttpMessageConverterConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.http.converter.StringHttpMessageConverter' (OnClassCondition)

HttpMessageConvertersAutoConfiguration.StringHttpMessageConverterConfiguration#stringHttpMessageConverter matched:

- @ConditionalOnMissingBean (types: org.springframework.http.converter.StringHttpMessageConverter; SearchStrategy: all) did not find any beans (OnBeanCondition)

JacksonAutoConfiguration matched:

- @ConditionalOnClass found required class 'com.fasterxml.jackson.databind.ObjectMapper' (OnClassCondition)

JacksonAutoConfiguration.Jackson2ObjectMapperBuilderCustomizerConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.http.converter.json.Jackson2ObjectMapperBuilder' (OnClassCondition)

JacksonAutoConfiguration.JacksonObjectMapperBuilderConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.http.converter.json.Jackson2ObjectMapperBuilder' (OnClassCondition)

JacksonAutoConfiguration.JacksonObjectMapperBuilderConfiguration#jacksonObjectMapperBuilder matched:

- @ConditionalOnMissingBean (types: org.springframework.http.converter.json.Jackson2ObjectMapperBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

JacksonAutoConfiguration.JacksonObjectMapperConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.http.converter.json.Jackson2ObjectMapperBuilder' (OnClassCondition)

JacksonAutoConfiguration.JacksonObjectMapperConfiguration#jacksonObjectMapper matched:

- @ConditionalOnMissingBean (types: com.fasterxml.jackson.databind.ObjectMapper; SearchStrategy: all) did not find any beans (OnBeanCondition)

JacksonAutoConfiguration.ParameterNamesModuleConfiguration matched:

- @ConditionalOnClass found required class 'com.fasterxml.jackson.module.paramnames.ParameterNamesModule' (OnClassCondition)

JacksonAutoConfiguration.ParameterNamesModuleConfiguration#parameterNamesModule matched:

- @ConditionalOnMissingBean (types: com.fasterxml.jackson.module.paramnames.ParameterNamesModule; SearchStrategy: all) did not find any beans (OnBeanCondition)

JacksonHttpMessageConvertersConfiguration.MappingJackson2HttpMessageConverterConfiguration matched:

- @ConditionalOnClass found required class 'com.fasterxml.jackson.databind.ObjectMapper' (OnClassCondition)

- @ConditionalOnProperty (spring.mvc.converters.preferred-json-mapper=jackson) matched (OnPropertyCondition)

- @ConditionalOnBean (types: com.fasterxml.jackson.databind.ObjectMapper; SearchStrategy: all) found bean 'jacksonObjectMapper' (OnBeanCondition)

JacksonHttpMessageConvertersConfiguration.MappingJackson2HttpMessageConverterConfiguration#mappingJackson2HttpMessageConverter matched:

- @ConditionalOnMissingBean (types: org.springframework.http.converter.json.MappingJackson2HttpMessageConverter ignored: org.springframework.hateoas.server.mvc.TypeConstrainedMappingJackson2HttpMessageConverter,org.springframework.data.rest.webmvc.alps.AlpsJsonHttpMessageConverter; SearchStrategy: all) did not find any beans (OnBeanCondition)

JdbcTemplateAutoConfiguration matched:

- @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.core.JdbcTemplate' (OnClassCondition)

- @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) found a primary bean from beans 'dataSource' (OnBeanCondition)

JdbcTemplateConfiguration matched:

- @ConditionalOnMissingBean (types: org.springframework.jdbc.core.JdbcOperations; SearchStrategy: all) did not find any beans (OnBeanCondition)

JpaBaseConfiguration#entityManagerFactory matched:

- @ConditionalOnMissingBean (types: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean,javax.persistence.EntityManagerFactory; SearchStrategy: all) did not find any beans (OnBeanCondition)

JpaBaseConfiguration#entityManagerFactoryBuilder matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

JpaBaseConfiguration#jpaVendorAdapter matched:

- @ConditionalOnMissingBean (types: org.springframework.orm.jpa.JpaVendorAdapter; SearchStrategy: all) did not find any beans (OnBeanCondition)

JpaBaseConfiguration#transactionManager matched:

- @ConditionalOnMissingBean (types: org.springframework.transaction.PlatformTransactionManager; SearchStrategy: all) did not find any beans (OnBeanCondition)

JpaBaseConfiguration.JpaWebConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.web.servlet.config.annotation.WebMvcConfigurer' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

- @ConditionalOnProperty (spring.jpa.open-in-view=true) matched (OnPropertyCondition)

- @ConditionalOnMissingBean (types: org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor,org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter; SearchStrategy: all) did not find any beans (OnBeanCondition)

JpaRepositoriesAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.data.jpa.repository.JpaRepository' (OnClassCondition)

- @ConditionalOnProperty (spring.data.jpa.repositories.enabled=true) matched (OnPropertyCondition)

- @ConditionalOnBean (types: javax.sql.DataSource; SearchStrategy: all) found bean 'dataSource'; @ConditionalOnMissingBean (types: org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean,org.springframework.data.jpa.repository.config.JpaRepositoryConfigExtension; SearchStrategy: all) did not find any beans (OnBeanCondition)

JpaRepositoriesAutoConfiguration#entityManagerFactoryBootstrapExecutorCustomizer matched:

- AnyNestedCondition 1 matched 1 did not; NestedCondition on JpaRepositoriesAutoConfiguration.BootstrapExecutorCondition.LazyBootstrapMode @ConditionalOnProperty (spring.data.jpa.repositories.bootstrap-mode=lazy) did not find property 'bootstrap-mode'; NestedCondition on JpaRepositoriesAutoConfiguration.BootstrapExecutorCondition.DeferredBootstrapMode @ConditionalOnProperty (spring.data.jpa.repositories.bootstrap-mode=deferred) matched (JpaRepositoriesAutoConfiguration.BootstrapExecutorCondition)

JtaAutoConfiguration matched:

- @ConditionalOnClass found required class 'javax.transaction.Transaction' (OnClassCondition)

- @ConditionalOnProperty (spring.jta.enabled) matched (OnPropertyCondition)

LifecycleAutoConfiguration#defaultLifecycleProcessor matched:

- @ConditionalOnMissingBean (names: lifecycleProcessor; SearchStrategy: all) did not find any beans (OnBeanCondition)

LocalDevToolsAutoConfiguration matched:

- Initialized Restarter Condition available and initialized (OnInitializedRestarterCondition)

LocalDevToolsAutoConfiguration.LiveReloadConfiguration matched:

- @ConditionalOnProperty (spring.devtools.livereload.enabled) matched (OnPropertyCondition)

LocalDevToolsAutoConfiguration.LiveReloadConfiguration#liveReloadServer matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.devtools.livereload.LiveReloadServer; SearchStrategy: all) did not find any beans (OnBeanCondition)

LocalDevToolsAutoConfiguration.RestartConfiguration matched:

- @ConditionalOnProperty (spring.devtools.restart.enabled) matched (OnPropertyCondition)

LocalDevToolsAutoConfiguration.RestartConfiguration#classPathFileSystemWatcher matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.devtools.classpath.ClassPathFileSystemWatcher; SearchStrategy: all) did not find any beans (OnBeanCondition)

LocalDevToolsAutoConfiguration.RestartConfiguration#classPathRestartStrategy matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.devtools.classpath.ClassPathRestartStrategy; SearchStrategy: all) did not find any beans (OnBeanCondition)

LocalDevToolsAutoConfiguration.RestartConfiguration#conditionEvaluationDeltaLoggingListener matched:

- @ConditionalOnProperty (spring.devtools.restart.log-condition-evaluation-delta) matched (OnPropertyCondition)

MultipartAutoConfiguration matched:

- @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.springframework.web.multipart.support.StandardServletMultipartResolver', 'javax.servlet.MultipartConfigElement' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

- @ConditionalOnProperty (spring.servlet.multipart.enabled) matched (OnPropertyCondition)

MultipartAutoConfiguration#multipartConfigElement matched:

- @ConditionalOnMissingBean (types: javax.servlet.MultipartConfigElement,org.springframework.web.multipart.commons.CommonsMultipartResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

MultipartAutoConfiguration#multipartResolver matched:

- @ConditionalOnMissingBean (types: org.springframework.web.multipart.MultipartResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

NamedParameterJdbcTemplateConfiguration matched:

- @ConditionalOnSingleCandidate (types: org.springframework.jdbc.core.JdbcTemplate; SearchStrategy: all) found a primary bean from beans 'jdbcTemplate'; @ConditionalOnMissingBean (types: org.springframework.jdbc.core.namedparam.NamedParameterJdbcOperations; SearchStrategy: all) did not find any beans (OnBeanCondition)

NoOpCacheConfiguration matched:

- Cache org.springframework.boot.autoconfigure.cache.NoOpCacheConfiguration automatic cache type (CacheCondition)

OAuth2ResourceServerAutoConfiguration matched:

- found 'session' scope (OnWebApplicationCondition)

PersistenceExceptionTranslationAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor' (OnClassCondition)

PersistenceExceptionTranslationAutoConfiguration#persistenceExceptionTranslationPostProcessor matched:

- @ConditionalOnProperty (spring.dao.exceptiontranslation.enabled) matched (OnPropertyCondition)

- @ConditionalOnMissingBean (types: org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor; SearchStrategy: all) did not find any beans (OnBeanCondition)

PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer matched:

- @ConditionalOnMissingBean (types: org.springframework.context.support.PropertySourcesPlaceholderConfigurer; SearchStrategy: current) did not find any beans (OnBeanCondition)

RestTemplateAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.web.client.RestTemplate' (OnClassCondition)

- NoneNestedConditions 0 matched 1 did not; NestedCondition on RestTemplateAutoConfiguration.NotReactiveWebApplicationCondition.ReactiveWebApplication did not find reactive web application classes (RestTemplateAutoConfiguration.NotReactiveWebApplicationCondition)

RestTemplateAutoConfiguration#restTemplateBuilder matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.web.client.RestTemplateBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

SecurityAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.security.authentication.DefaultAuthenticationEventPublisher' (OnClassCondition)

SecurityAutoConfiguration#authenticationEventPublisher matched:

- @ConditionalOnMissingBean (types: org.springframework.security.authentication.AuthenticationEventPublisher; SearchStrategy: all) did not find any beans (OnBeanCondition)

SecurityFilterAutoConfiguration matched:

- @ConditionalOnClass found required classes 'org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer', 'org.springframework.security.config.http.SessionCreationPolicy' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

SecurityFilterAutoConfiguration#securityFilterChainRegistration matched:

- @ConditionalOnBean (names: springSecurityFilterChain; SearchStrategy: all) found bean 'springSecurityFilterChain' (OnBeanCondition)

ServletWebServerFactoryAutoConfiguration matched:

- @ConditionalOnClass found required class 'javax.servlet.ServletRequest' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

ServletWebServerFactoryAutoConfiguration#tomcatServletWebServerFactoryCustomizer matched:

- @ConditionalOnClass found required class 'org.apache.catalina.startup.Tomcat' (OnClassCondition)

ServletWebServerFactoryConfiguration.EmbeddedTomcat matched:

- @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.apache.catalina.startup.Tomcat', 'org.apache.coyote.UpgradeProtocol' (OnClassCondition)

- @ConditionalOnMissingBean (types: org.springframework.boot.web.servlet.server.ServletWebServerFactory; SearchStrategy: current) did not find any beans (OnBeanCondition)

SimpleCacheConfiguration matched:

- Cache org.springframework.boot.autoconfigure.cache.SimpleCacheConfiguration automatic cache type (CacheCondition)

SpringDataWebAutoConfiguration matched:

- @ConditionalOnClass found required classes 'org.springframework.data.web.PageableHandlerMethodArgumentResolver', 'org.springframework.web.servlet.config.annotation.WebMvcConfigurer' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

- @ConditionalOnMissingBean (types: org.springframework.data.web.PageableHandlerMethodArgumentResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

SpringDataWebAutoConfiguration#pageableCustomizer matched:

- @ConditionalOnMissingBean (types: org.springframework.data.web.config.PageableHandlerMethodArgumentResolverCustomizer; SearchStrategy: all) did not find any beans (OnBeanCondition)

SpringDataWebAutoConfiguration#sortCustomizer matched:

- @ConditionalOnMissingBean (types: org.springframework.data.web.config.SortHandlerMethodArgumentResolverCustomizer; SearchStrategy: all) did not find any beans (OnBeanCondition)

TaskExecutionAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor' (OnClassCondition)

TaskExecutionAutoConfiguration#applicationTaskExecutor matched:

- @ConditionalOnMissingBean (types: java.util.concurrent.Executor; SearchStrategy: all) did not find any beans (OnBeanCondition)

TaskExecutionAutoConfiguration#taskExecutorBuilder matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.task.TaskExecutorBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

TaskSchedulingAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler' (OnClassCondition)

TaskSchedulingAutoConfiguration#taskSchedulerBuilder matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.task.TaskSchedulerBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

ThymeleafAutoConfiguration matched:

- @ConditionalOnClass found required classes 'org.thymeleaf.templatemode.TemplateMode', 'org.thymeleaf.spring5.SpringTemplateEngine' (OnClassCondition)

ThymeleafAutoConfiguration.DefaultTemplateResolverConfiguration matched:

- @ConditionalOnMissingBean (names: defaultTemplateResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

ThymeleafAutoConfiguration.ThymeleafDefaultConfiguration#templateEngine matched:

- @ConditionalOnMissingBean (types: org.thymeleaf.spring5.ISpringTemplateEngine; SearchStrategy: all) did not find any beans (OnBeanCondition)

ThymeleafAutoConfiguration.ThymeleafJava8TimeDialect matched:

- @ConditionalOnClass found required class 'org.thymeleaf.extras.java8time.dialect.Java8TimeDialect' (OnClassCondition)

ThymeleafAutoConfiguration.ThymeleafJava8TimeDialect#java8TimeDialect matched:

- @ConditionalOnMissingBean (types: org.thymeleaf.extras.java8time.dialect.Java8TimeDialect; SearchStrategy: all) did not find any beans (OnBeanCondition)

ThymeleafAutoConfiguration.ThymeleafWebMvcConfiguration matched:

- found 'session' scope (OnWebApplicationCondition)

- @ConditionalOnProperty (spring.thymeleaf.enabled) matched (OnPropertyCondition)

ThymeleafAutoConfiguration.ThymeleafWebMvcConfiguration.ThymeleafViewResolverConfiguration#thymeleafViewResolver matched:

- @ConditionalOnMissingBean (names: thymeleafViewResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

TransactionAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.transaction.PlatformTransactionManager' (OnClassCondition)

TransactionAutoConfiguration#platformTransactionManagerCustomizers matched:

- @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.transaction.TransactionManagerCustomizers; SearchStrategy: all) did not find any beans (OnBeanCondition)

TransactionAutoConfiguration.EnableTransactionManagementConfiguration matched:

- @ConditionalOnBean (types: org.springframework.transaction.TransactionManager; SearchStrategy: all) found bean 'transactionManager'; @ConditionalOnMissingBean (types: org.springframework.transaction.annotation.AbstractTransactionManagementConfiguration; SearchStrategy: all) did not find any beans (OnBeanCondition)

TransactionAutoConfiguration.EnableTransactionManagementConfiguration.CglibAutoProxyConfiguration matched:

- @ConditionalOnProperty (spring.aop.proxy-target-class=true) matched (OnPropertyCondition)

TransactionAutoConfiguration.TransactionTemplateConfiguration matched:

- @ConditionalOnSingleCandidate (types: org.springframework.transaction.PlatformTransactionManager; SearchStrategy: all) found a primary bean from beans 'transactionManager' (OnBeanCondition)

TransactionAutoConfiguration.TransactionTemplateConfiguration#transactionTemplate matched:

- @ConditionalOnMissingBean (types: org.springframework.transaction.support.TransactionOperations; SearchStrategy: all) did not find any beans (OnBeanCondition)

UserDetailsServiceAutoConfiguration matched:

- @ConditionalOnClass found required class 'org.springframework.security.authentication.AuthenticationManager' (OnClassCondition)

- @ConditionalOnBean (types: org.springframework.security.config.annotation.ObjectPostProcessor; SearchStrategy: all) found bean 'objectPostProcessor'; @ConditionalOnMissingBean (types: org.springframework.security.authentication.AuthenticationManager,org.springframework.security.authentication.AuthenticationProvider,org.springframework.security.core.userdetails.UserDetailsService,org.springframework.security.oauth2.jwt.JwtDecoder,org.springframework.security.oauth2.server.resource.introspection.OpaqueTokenIntrospector; SearchStrategy: all) did not find any beans (OnBeanCondition)

UserDetailsServiceAutoConfiguration#inMemoryUserDetailsManager matched:

- @ConditionalOnMissingBean (types: org.springframework.security.oauth2.client.registration.ClientRegistrationRepository; SearchStrategy: all) did not find any beans (OnBeanCondition)

WebSecurityEnablerConfiguration matched:

- found 'session' scope (OnWebApplicationCondition)

- @ConditionalOnBean (types: org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; SearchStrategy: all) found bean 'securityConfig'; @ConditionalOnMissingBean (names: springSecurityFilterChain; SearchStrategy: all) did not find any beans (OnBeanCondition)

WebSocketServletAutoConfiguration matched:

- @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'javax.websocket.server.ServerContainer' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

WebSocketServletAutoConfiguration.TomcatWebSocketConfiguration matched:

- @ConditionalOnClass found required classes 'org.apache.catalina.startup.Tomcat', 'org.apache.tomcat.websocket.server.WsSci' (OnClassCondition)

WebSocketServletAutoConfiguration.TomcatWebSocketConfiguration#websocketServletWebServerCustomizer matched:

- @ConditionalOnMissingBean (names: websocketServletWebServerCustomizer; SearchStrategy: all) did not find any beans (OnBeanCondition)

Negative matches:

-----------------

ActiveMQAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.jms.ConnectionFactory' (OnClassCondition)

AopAutoConfiguration.AspectJAutoProxyingConfiguration.JdkDynamicAutoProxyConfiguration:

Did not match:

- @ConditionalOnProperty (spring.aop.proxy-target-class=false) did not find property 'proxy-target-class' (OnPropertyCondition)

AopAutoConfiguration.ClassProxyingConfiguration:

Did not match:

- @ConditionalOnMissingClass found unwanted class 'org.aspectj.weaver.Advice' (OnClassCondition)

ArtemisAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.jms.ConnectionFactory' (OnClassCondition)

AtomikosJtaConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.atomikos.icatch.jta.UserTransactionManager' (OnClassCondition)

BatchAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.batch.core.launch.JobLauncher' (OnClassCondition)

BitronixJtaConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'bitronix.tm.jndi.BitronixContext' (OnClassCondition)

CacheAutoConfiguration:

Did not match:

- @ConditionalOnBean (types: org.springframework.cache.interceptor.CacheAspectSupport; SearchStrategy: all) did not find any beans of type org.springframework.cache.interceptor.CacheAspectSupport (OnBeanCondition)

Matched:

- @ConditionalOnClass found required class 'org.springframework.cache.CacheManager' (OnClassCondition)

CacheAutoConfiguration.CacheManagerEntityManagerFactoryDependsOnPostProcessor:

Did not match:

- Ancestor org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration did not match (ConditionEvaluationReport.AncestorsMatchedCondition)

Matched:

- @ConditionalOnClass found required class 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

CaffeineCacheConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.github.benmanes.caffeine.cache.Caffeine' (OnClassCondition)

CassandraAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.datastax.oss.driver.api.core.CqlSession' (OnClassCondition)

CassandraDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.datastax.oss.driver.api.core.CqlSession' (OnClassCondition)

CassandraReactiveDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.datastax.oss.driver.api.core.CqlSession' (OnClassCondition)

CassandraReactiveRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.cassandra.ReactiveSession' (OnClassCondition)

CassandraRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.datastax.oss.driver.api.core.CqlSession' (OnClassCondition)

ClientHttpConnectorAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.web.reactive.function.client.WebClient' (OnClassCondition)

CodecsAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.web.reactive.function.client.WebClient' (OnClassCondition)

CouchbaseAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.couchbase.client.java.Cluster' (OnClassCondition)

CouchbaseCacheConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.couchbase.client.java.Cluster' (OnClassCondition)

CouchbaseDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.couchbase.client.java.Bucket' (OnClassCondition)

CouchbaseReactiveDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.couchbase.client.java.Cluster' (OnClassCondition)

CouchbaseReactiveRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.couchbase.client.java.Cluster' (OnClassCondition)

CouchbaseRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.couchbase.client.java.Bucket' (OnClassCondition)

DataSourceAutoConfiguration.EmbeddedDatabaseConfiguration:

Did not match:

- EmbeddedDataSource spring.datasource.url is set (DataSourceAutoConfiguration.EmbeddedDatabaseCondition)

DataSourceConfiguration.Dbcp2:

Did not match:

- @ConditionalOnClass did not find required class 'org.apache.commons.dbcp2.BasicDataSource' (OnClassCondition)

DataSourceConfiguration.Generic:

Did not match:

- @ConditionalOnProperty (spring.datasource.type) did not find property 'spring.datasource.type' (OnPropertyCondition)

DataSourceConfiguration.Tomcat:

Did not match:

- @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSource' (OnClassCondition)

DataSourceJmxConfiguration.TomcatDataSourceJmxConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSourceProxy' (OnClassCondition)

DataSourcePoolMetadataProvidersConfiguration.CommonsDbcp2PoolDataSourceMetadataProviderConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.apache.commons.dbcp2.BasicDataSource' (OnClassCondition)

DataSourcePoolMetadataProvidersConfiguration.TomcatDataSourcePoolMetadataProviderConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSource' (OnClassCondition)

DataSourceTransactionManagerAutoConfiguration.DataSourceTransactionManagerConfiguration#transactionManager:

Did not match:

- @ConditionalOnMissingBean (types: org.springframework.transaction.PlatformTransactionManager; SearchStrategy: all) found beans of type 'org.springframework.transaction.PlatformTransactionManager' transactionManager (OnBeanCondition)

DispatcherServletAutoConfiguration.DispatcherServletConfiguration#multipartResolver:

Did not match:

- @ConditionalOnBean (types: org.springframework.web.multipart.MultipartResolver; SearchStrategy: all) did not find any beans of type org.springframework.web.multipart.MultipartResolver (OnBeanCondition)

EhCacheCacheConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'net.sf.ehcache.Cache' (OnClassCondition)

ElasticsearchDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.elasticsearch.core.ElasticsearchTemplate' (OnClassCondition)

ElasticsearchRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.elasticsearch.client.Client' (OnClassCondition)

ElasticsearchRestClientAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.elasticsearch.client.RestClient' (OnClassCondition)

EmbeddedLdapAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.unboundid.ldap.listener.InMemoryDirectoryServer' (OnClassCondition)

EmbeddedMongoAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.mongodb.MongoClientSettings' (OnClassCondition)

EmbeddedWebServerFactoryCustomizerAutoConfiguration.JettyWebServerFactoryCustomizerConfiguration:

Did not match:

- @ConditionalOnClass did not find required classes 'org.eclipse.jetty.server.Server', 'org.eclipse.jetty.util.Loader', 'org.eclipse.jetty.webapp.WebAppContext' (OnClassCondition)

EmbeddedWebServerFactoryCustomizerAutoConfiguration.NettyWebServerFactoryCustomizerConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'reactor.netty.http.server.HttpServer' (OnClassCondition)

EmbeddedWebServerFactoryCustomizerAutoConfiguration.UndertowWebServerFactoryCustomizerConfiguration:

Did not match:

- @ConditionalOnClass did not find required classes 'io.undertow.Undertow', 'org.xnio.SslClientAuthMode' (OnClassCondition)

ErrorWebFluxAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.web.reactive.config.WebFluxConfigurer' (OnClassCondition)

FlywayAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.flywaydb.core.Flyway' (OnClassCondition)

FreeMarkerAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'freemarker.template.Configuration' (OnClassCondition)

GroovyTemplateAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'groovy.text.markup.MarkupTemplateEngine' (OnClassCondition)

GsonAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.google.gson.Gson' (OnClassCondition)

GsonHttpMessageConvertersConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.google.gson.Gson' (OnClassCondition)

HazelcastAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.hazelcast.core.HazelcastInstance' (OnClassCondition)

HazelcastCacheConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.hazelcast.core.HazelcastInstance' (OnClassCondition)

HazelcastJpaDependencyAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.hazelcast.core.HazelcastInstance' (OnClassCondition)

HttpHandlerAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.web.reactive.DispatcherHandler' (OnClassCondition)

HypermediaAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.hateoas.EntityModel' (OnClassCondition)

InfinispanCacheConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.infinispan.spring.embedded.provider.SpringEmbeddedCacheManager' (OnClassCondition)

InfluxDbAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.influxdb.InfluxDB' (OnClassCondition)

IntegrationAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.integration.config.EnableIntegration' (OnClassCondition)

JCacheCacheConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.cache.Caching' (OnClassCondition)

JacksonHttpMessageConvertersConfiguration.MappingJackson2XmlHttpMessageConverterConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.fasterxml.jackson.dataformat.xml.XmlMapper' (OnClassCondition)

JdbcRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.jdbc.repository.config.AbstractJdbcConfiguration' (OnClassCondition)

JerseyAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.glassfish.jersey.server.spring.SpringComponentProvider' (OnClassCondition)

JmsAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.jms.Message' (OnClassCondition)

JmxAutoConfiguration:

Did not match:

- @ConditionalOnProperty (spring.jmx.enabled=true) did not find property 'enabled' (OnPropertyCondition)

Matched:

- @ConditionalOnClass found required class 'org.springframework.jmx.export.MBeanExporter' (OnClassCondition)

JndiConnectionFactoryAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.jms.core.JmsTemplate' (OnClassCondition)

JndiDataSourceAutoConfiguration:

Did not match:

- @ConditionalOnProperty (spring.datasource.jndi-name) did not find property 'jndi-name' (OnPropertyCondition)

Matched:

- @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType' (OnClassCondition)

JndiJtaConfiguration:

Did not match:

- @ConditionalOnJndi JNDI environment is not available (OnJndiCondition)

Matched:

- @ConditionalOnClass found required class 'org.springframework.transaction.jta.JtaTransactionManager' (OnClassCondition)

JooqAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.jooq.DSLContext' (OnClassCondition)

JsonbAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.json.bind.Jsonb' (OnClassCondition)

JsonbHttpMessageConvertersConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.json.bind.Jsonb' (OnClassCondition)

KafkaAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.kafka.core.KafkaTemplate' (OnClassCondition)

LdapAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.ldap.core.ContextSource' (OnClassCondition)

LdapRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.ldap.repository.LdapRepository' (OnClassCondition)

LiquibaseAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'liquibase.change.DatabaseChange' (OnClassCondition)

MailSenderAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.mail.internet.MimeMessage' (OnClassCondition)

MailSenderValidatorAutoConfiguration:

Did not match:

- @ConditionalOnSingleCandidate did not find required type 'org.springframework.mail.javamail.JavaMailSenderImpl' (OnBeanCondition)

MessageSourceAutoConfiguration:

Did not match:

- ResourceBundle did not find bundle with basename messages (MessageSourceAutoConfiguration.ResourceBundleCondition)

MongoAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.mongodb.client.MongoClient' (OnClassCondition)

MongoDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.mongodb.client.MongoClient' (OnClassCondition)

MongoReactiveAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.mongodb.reactivestreams.client.MongoClient' (OnClassCondition)

MongoReactiveDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.mongodb.reactivestreams.client.MongoClient' (OnClassCondition)

MongoReactiveRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.mongodb.reactivestreams.client.MongoClient' (OnClassCondition)

MongoRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.mongodb.client.MongoClient' (OnClassCondition)

MustacheAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.samskivert.mustache.Mustache' (OnClassCondition)

Neo4jDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.neo4j.ogm.session.SessionFactory' (OnClassCondition)

Neo4jRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.neo4j.ogm.session.Neo4jSession' (OnClassCondition)

OAuth2ClientAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.security.oauth2.client.registration.ClientRegistration' (OnClassCondition)

Oauth2ResourceServerConfiguration.JwtConfiguration:

Did not match:

- @ConditionalOnClass did not find required classes 'org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken', 'org.springframework.security.oauth2.jwt.JwtDecoder' (OnClassCondition)

Oauth2ResourceServerConfiguration.OpaqueTokenConfiguration:

Did not match:

- @ConditionalOnClass did not find required classes 'org.springframework.security.oauth2.server.resource.BearerTokenAuthenticationToken', 'org.springframework.security.oauth2.server.resource.introspection.OpaqueTokenIntrospector' (OnClassCondition)

ProjectInfoAutoConfiguration#buildProperties:

Did not match:

- @ConditionalOnResource did not find resource '${spring.info.build.location:classpath:META-INF/build-info.properties}' (OnResourceCondition)

ProjectInfoAutoConfiguration#gitProperties:

Did not match:

- GitResource did not find git info at classpath:git.properties (ProjectInfoAutoConfiguration.GitResourceAvailableCondition)

QuartzAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.quartz.Scheduler' (OnClassCondition)

R2dbcAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'io.r2dbc.spi.ConnectionFactory' (OnClassCondition)

R2dbcDataAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.r2dbc.core.DatabaseClient' (OnClassCondition)

R2dbcRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'io.r2dbc.spi.ConnectionFactory' (OnClassCondition)

R2dbcTransactionManagerAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.r2dbc.connectionfactory.R2dbcTransactionManager' (OnClassCondition)

RSocketMessagingAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'io.rsocket.RSocketFactory' (OnClassCondition)

RSocketRequesterAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'io.rsocket.RSocketFactory' (OnClassCondition)

RSocketSecurityAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.security.rsocket.core.SecuritySocketAcceptorInterceptor' (OnClassCondition)

RSocketServerAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'io.rsocket.core.RSocketServer' (OnClassCondition)

RSocketStrategiesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'io.netty.buffer.PooledByteBufAllocator' (OnClassCondition)

RabbitAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.rabbitmq.client.Channel' (OnClassCondition)

ReactiveElasticsearchRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.elasticsearch.client.reactive.ReactiveElasticsearchClient' (OnClassCondition)

ReactiveElasticsearchRestClientAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'reactor.netty.http.client.HttpClient' (OnClassCondition)

ReactiveOAuth2ClientAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'reactor.core.publisher.Flux' (OnClassCondition)

ReactiveOAuth2ResourceServerAutoConfiguration:

Did not match:

- @ConditionalOnWebApplication did not find reactive web application classes (OnWebApplicationCondition)

ReactiveSecurityAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'reactor.core.publisher.Flux' (OnClassCondition)

ReactiveUserDetailsServiceAutoConfiguration:

Did not match:

- AnyNestedCondition 0 matched 2 did not; NestedCondition on ReactiveUserDetailsServiceAutoConfiguration.ReactiveUserDetailsServiceCondition.ReactiveWebApplicationCondition did not find reactive web application classes; NestedCondition on ReactiveUserDetailsServiceAutoConfiguration.ReactiveUserDetailsServiceCondition.RSocketSecurityEnabledCondition @ConditionalOnBean (types: org.springframework.messaging.rsocket.annotation.support.RSocketMessageHandler; SearchStrategy: all) did not find any beans of type org.springframework.messaging.rsocket.annotation.support.RSocketMessageHandler (ReactiveUserDetailsServiceAutoConfiguration.ReactiveUserDetailsServiceCondition)

Matched:

- @ConditionalOnClass found required class 'org.springframework.security.authentication.ReactiveAuthenticationManager' (OnClassCondition)

ReactiveWebServerFactoryAutoConfiguration:

Did not match:

- @ConditionalOnWebApplication did not find reactive web application classes (OnWebApplicationCondition)

RedisAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.redis.core.RedisOperations' (OnClassCondition)

RedisCacheConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.redis.connection.RedisConnectionFactory' (OnClassCondition)

RedisReactiveAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'reactor.core.publisher.Flux' (OnClassCondition)

RedisRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.redis.repository.configuration.EnableRedisRepositories' (OnClassCondition)

RemoteDevToolsAutoConfiguration:

Did not match:

- @ConditionalOnProperty (spring.devtools.remote.secret) did not find property 'secret' (OnPropertyCondition)

Matched:

- @ConditionalOnClass found required classes 'javax.servlet.Filter', 'org.springframework.http.server.ServerHttpRequest' (OnClassCondition)

RepositoryRestMvcAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration' (OnClassCondition)

Saml2RelyingPartyAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.security.saml2.provider.service.registration.RelyingPartyRegistrationRepository' (OnClassCondition)

SecurityDataConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.security.data.repository.query.SecurityEvaluationContextExtension' (OnClassCondition)

SendGridAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.sendgrid.SendGrid' (OnClassCondition)

ServletWebServerFactoryAutoConfiguration#forwardedHeaderFilter:

Did not match:

- @ConditionalOnProperty (server.forward-headers-strategy=framework) did not find property 'server.forward-headers-strategy' (OnPropertyCondition)

ServletWebServerFactoryConfiguration.EmbeddedJetty:

Did not match:

- @ConditionalOnClass did not find required classes 'org.eclipse.jetty.server.Server', 'org.eclipse.jetty.util.Loader', 'org.eclipse.jetty.webapp.WebAppContext' (OnClassCondition)

ServletWebServerFactoryConfiguration.EmbeddedUndertow:

Did not match:

- @ConditionalOnClass did not find required classes 'io.undertow.Undertow', 'org.xnio.SslClientAuthMode' (OnClassCondition)

SessionAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.session.Session' (OnClassCondition)

SolrAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.apache.solr.client.solrj.impl.CloudSolrClient' (OnClassCondition)

SolrRepositoriesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.apache.solr.client.solrj.SolrClient' (OnClassCondition)

SpringApplicationAdminJmxAutoConfiguration:

Did not match:

- @ConditionalOnProperty (spring.application.admin.enabled=true) did not find property 'enabled' (OnPropertyCondition)

SpringBootWebSecurityConfiguration:

Did not match:

- @ConditionalOnMissingBean (types: org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; SearchStrategy: all) found beans of type 'org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter' securityConfig (OnBeanCondition)

Matched:

- @ConditionalOnClass found required class 'org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

TaskSchedulingAutoConfiguration#taskScheduler:

Did not match:

- @ConditionalOnBean (names: org.springframework.context.annotation.internalScheduledAnnotationProcessor; SearchStrategy: all) did not find any beans named org.springframework.context.annotation.internalScheduledAnnotationProcessor (OnBeanCondition)

ThymeleafAutoConfiguration.DataAttributeDialectConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'com.github.mxab.thymeleaf.extras.dataattribute.dialect.DataAttributeDialect' (OnClassCondition)

ThymeleafAutoConfiguration.ThymeleafReactiveConfiguration:

Did not match:

- did not find reactive web application classes (OnWebApplicationCondition)

ThymeleafAutoConfiguration.ThymeleafSecurityDialectConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.thymeleaf.extras.springsecurity5.dialect.SpringSecurityDialect' (OnClassCondition)

ThymeleafAutoConfiguration.ThymeleafWebFluxConfiguration:

Did not match:

- did not find reactive web application classes (OnWebApplicationCondition)

ThymeleafAutoConfiguration.ThymeleafWebLayoutConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'nz.net.ultraq.thymeleaf.LayoutDialect' (OnClassCondition)

ThymeleafAutoConfiguration.ThymeleafWebMvcConfiguration#resourceUrlEncodingFilter:

Did not match:

- @ConditionalOnEnabledResourceChain did not find class org.webjars.WebJarAssetLocator (OnEnabledResourceChainCondition)

TransactionAutoConfiguration#transactionalOperator:

Did not match:

- @ConditionalOnSingleCandidate (types: org.springframework.transaction.ReactiveTransactionManager; SearchStrategy: all) did not find any beans (OnBeanCondition)

TransactionAutoConfiguration.EnableTransactionManagementConfiguration.JdkDynamicAutoProxyConfiguration:

Did not match:

- @ConditionalOnProperty (spring.aop.proxy-target-class=false) did not find property 'proxy-target-class' (OnPropertyCondition)

ValidationAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'javax.validation.executable.ExecutableValidator' (OnClassCondition)

WebClientAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.web.reactive.function.client.WebClient' (OnClassCondition)

WebFluxAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.web.reactive.config.WebFluxConfigurer' (OnClassCondition)

WebMvcAutoConfiguration:

Did not match:

- @ConditionalOnMissingBean (types: org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; SearchStrategy: all) found beans of type 'org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport' applicationConfig (OnBeanCondition)

Matched:

- @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.springframework.web.servlet.DispatcherServlet', 'org.springframework.web.servlet.config.annotation.WebMvcConfigurer' (OnClassCondition)

- found 'session' scope (OnWebApplicationCondition)

WebMvcAutoConfiguration.ResourceChainCustomizerConfiguration:

Did not match:

- @ConditionalOnEnabledResourceChain did not find class org.webjars.WebJarAssetLocator (OnEnabledResourceChainCondition)

- Ancestor org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration did not match (ConditionEvaluationReport.AncestorsMatchedCondition)

WebServiceTemplateAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.oxm.Marshaller' (OnClassCondition)

WebServicesAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.ws.transport.http.MessageDispatcherServlet' (OnClassCondition)

WebSocketMessagingAutoConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer' (OnClassCondition)

WebSocketReactiveAutoConfiguration:

Did not match:

- @ConditionalOnWebApplication did not find reactive web application classes (OnWebApplicationCondition)

WebSocketServletAutoConfiguration.JettyWebSocketConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer' (OnClassCondition)

WebSocketServletAutoConfiguration.UndertowWebSocketConfiguration:

Did not match:

- @ConditionalOnClass did not find required class 'io.undertow.websockets.jsr.Bootstrap' (OnClassCondition)

XADataSourceAutoConfiguration:

Did not match:

- @ConditionalOnBean (types: org.springframework.boot.jdbc.XADataSourceWrapper; SearchStrategy: all) did not find any beans of type org.springframework.boot.jdbc.XADataSourceWrapper (OnBeanCondition)

Matched:

- @ConditionalOnClass found required classes 'javax.sql.DataSource', 'javax.transaction.TransactionManager', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType' (OnClassCondition)

Exclusions:

-----------

None

Unconditional classes:

----------------------

org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration

org.springframework.boot.autoconfigure.context.LifecycleAutoConfiguration

org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration

org.springframework.boot.autoconfigure.availability.ApplicationAvailabilityAutoConfiguration

org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration

2020-07-03 15:17:37.303 INFO 25196 --- [ restartedMain] c.y.roombooking.RoomBookingApplication : Started RoomBookingApplication in 6.171 seconds (JVM running for 6.841)

2020-07-03 15:17:37.306 DEBUG 25196 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Creating new Restarter for thread Thread[main,5,main]

2020-07-03 15:17:37.306 DEBUG 25196 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Immediately restarting application

2020-07-03 15:17:37.306 DEBUG 25196 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Created RestartClassLoader org.springframework.boot.devtools.restart.classloader.RestartClassLoader@771b888

2020-07-03 15:17:37.306 DEBUG 25196 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Starting application com.ynz.roombooking.RoomBookingApplication with URLs [file:/C:/Users/zhaoy/IdeaProjects/room-booking/target/classes/]

Tuesday, 26 May 2020

Command-line Runner vs Application Runner

They both may be useful for writing init, admin tasks.

We use Command-line runner interface to wrap a set of work, and bring it into the Spring boot, and let it is carried out immediately after the application context is all up and running. We may inject application arguments into a command-line run method. We may have more than one command-line runner in one spring boot application and their orders can be controlled by an annotation @Order. Otherwise, Spring will select a default order for them.

ApplicationRunner is a cousin of Command-line runner.

Tuesday, 14 April 2020

Polymorphism

Polymorphism is the ability of an object to take on many forms. In OOP polymorphism is implemented by the Inheritance.

In Java, any class is polymorphic. Any class Is-A Object, meanwhile IS-A form of itself. At least, a class has two forms.

An abstract class, a superclass, or an interface, may have different forms due to their derivatives. A derivative may have many different forms.

Virtual method refers to a method is a method that is overridden by a child class. Its implementation is determined by its run time implementation instance.

Saturday, 11 April 2020

Spring Mvc

Spring Web MVC

Spring web MVC is built on the servlet API and has been included in the Spring framework from the very beginning. The formal name, "Spring Web MVC", comes from the name of its source module(spring-webmvc), but it is more commonly known as "Spring MVC"

Servlet means Server Component. Here, the let means component.

Spring MVC follows the front controller pattern, which stands for the core of the framework. It accepts the Http requests from the clients and mapping them to the corresponding handlers(controllers), which are also servlets.

DispatcherServlet

Spring MVC is designed around the front controller. It is a central servlet, i.e. dispatcher servlet, which provides a shared algorithm for request processing. However, actual works are performed by configurable delegators. This model is flexible and supports diverse workflows.

DispatcherServlet works like web.xml to mapping the request to its handler. Meaning that web.xml defines the mapping to locate the resource.

Traditionally, the developer needs to tell Spring container to bootstrap a servlet dispatcher by implements WebApplicationInitializer, where we may tell the container to instantiate a dispatcher servlet in the highest priority, meanwhile designating a specific WebApplicationContext, for instance, an AnnotationConfigWebApplicatoinContext. WebApplicationInitializer implementations are detected automatically, so you may package them within the application as you see fit.

 public class MyWebAppInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext container) {
      XmlWebApplicationContext appContext = new XmlWebApplicationContext();
      appContext.setConfigLocation("/WEB-INF/spring/dispatcher-config.xml");

      ServletRegistration.Dynamic dispatcher =
        container.addServlet("dispatcher", new DispatcherServlet(appContext));
      dispatcher.setLoadOnStartup(1);
      dispatcher.addMapping("/");
    }

 }

In the above, WEB-INF/web.xml was replaced with code in the form of a WebApplicationInitializer, but the actual dispatcher-config.xml Spring configuration remained XML-based. This can be configured in a 100% code-based approach.

 public class MyWebAppInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext container) {
      // Create the 'root' Spring application context
      AnnotationConfigWebApplicationContext rootContext =
        new AnnotationConfigWebApplicationContext();
      rootContext.register(AppConfig.class);

      // Manage the lifecycle of the root application context
      container.addListener(new ContextLoaderListener(rootContext));

      // Create the dispatcher servlet's Spring application context
      AnnotationConfigWebApplicationContext dispatcherContext =
        new AnnotationConfigWebApplicationContext();
      dispatcherContext.register(DispatcherConfig.class);

      // Register and map the dispatcher servlet
      ServletRegistration.Dynamic dispatcher =
        container.addServlet("dispatcher", new DispatcherServlet(dispatcherContext));
      dispatcher.setLoadOnStartup(1);
      dispatcher.addMapping("/");
    }

 }

In the Spring boot, the dispatcher servlet doesn't need to be initialized but auto-generated by the Spring container.

Whatever the ApplicationConfig is required, it extends from WebMvcConfiguartionSupport, which implements ApplicationContextAware and ServletContextAware. Because the Aware interface, Application context will transfer back its instance to the WebAMvcConfigurationSupport. This is the main class providing the configuration behind the MVC java config. It is typically imported by adding @EnableWebMvc to an application @Configuation class.

Within ApplicationConfig, we need to define InternalResourceViewResolver, which declares ①viewClass=org.thymeleaf.spring5.view;②prefix=/resource/templates/ ;③ suffix =.html
They are all resources but located inside the project. That is why it is called Internal resources. The view class is dependent on which view technique is applied in the project; the prefix is put before the logic view name, and the suffix is put after the logic view name; so that they together form a directory tree.

InternalResourceViewResolver is the most popular view-resolver, but there are other variants.

Special bean types:

HandlerMapping: maps request to the handler.
HandlerAdapter: invokes a handler.
HandlerExceptionResolver: helps with exception handling.
ViewResolver: helps resolve views.
LocaleResolver: helps for l10n and i18n support.
ThemeResolver: helps with stylized look and feel

Java-Based config:

We can now do completely in Java what used to be done in web.xml and Spring bean definition XML files.

Web application initializer
Root application context configuration
Dispatcher no.1 config: /main/*
Dispatcher no.2 config:/api/*

Controller

Controller Types: @Controller and @RestController
@RestController only return @ResponseBody; but@Controller returns view(a logical string) and model.

Controller methods decorated by @RestMapping are handlers, which response the request from the clients.

Request mapping by:

URI pattern with @PathVariable
@RequestParameter and parameter condition
@ModelAttribute: binding form fields to the java POJO attributes

Method input arguments:

25 supported

Method return values:

15 supported

Data Binding

Collecting data from view fields and binding them into java object, or in another way around, the java data model that is fetched from the controller, and then presented on the view (Html and JSP page)

From a view to a controller:

@ModelAttributes can be used at the method level or method parameter level.

When @ModelAttributes used at the method level. it is always called before any request handler(controller method decorated by a request mapping); meaning that, any model required has to be created before any request handler that can be carried out. This is used to instantiate models and giving them default values.

When @ModelAtrtributes used at the method parameter level, a form of a view can be bound into a java POJO model.

From controller to view:

The model can supply attributes used for rendering views. To provide a view with usable data, we simply add this data to its Model object. It is used as a Map, storing the data with a key. The Model can be directly injected from the controller method argument.

Data Validation:

Data could be polluted in the views as reaching the controllers. so it needs to be validated.

Spring validator interface for application-specific objects.
JSR 380(javax.validation) bean validation API is the standard. It goes well with Spring 5.1.

Using annotations to add validation rules on java bean attributes. Then the Spring framework will do validation for us.

Using annotation @Valid to Enable validation in the Controller method argument. The validation result is contained a BindingResult parameter, which must be declared immediately after the validated target.

Data Converter

For Http requests, string-based values are extracted from the request including request parameters, path variables, request headers, and cookie values. They may need to be converted to the target type of the method parameter or field they are expected to.

method parameters and type conversion

Binder methods:

Data transferred from the view normally in strings. @ModelAttribute can do field-to-attribute binding, mapping a string to string. In a case, binding a string to a specific java type, we have to declare a binder-method, which is used to register an object conversion or formating within a controller or globally across a group of controllers.

@InitBinderpublic void initBinder(WebDataBinder binder){
    binder.registerCustomEditor(Date.class, "dateOfBirth",

    new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true));}

@InitBinder method is applied to the request parameter data, URI variables, and form beans
customizing data binding with @InitBinder

Bind request parameters(that is, form or query data) to an object(model)
Convert String-based request values(request parameters, path variables, headers, cookies, and others) to the target type of controller method arguments.
Format model object values as String values when rendering HTML forms.

Exception Handling

Handled by DispatcherServlet
Delegates to handlerExceptionResolver beans
What does exception handling mean in an application

Implementations for exception handling:

ExceptionHandlerExceptionResolver: define exception handler methods in controllers
SimpleMappingExceptionResolver: map each exception class with an error page
DefaultHandlerExceptionResolver: default which maps exceptions to error codes
ResponseStatusExceptionResolver: resloves customer exceptions using @ResponseStatus

Handling exception locally in a controller scope.
@ExceptionHandler modifies a method that should be invoked to handle an exception.

@ExceptionHandler({FileSystemException.class, RemoteException.class}) public ResponseEntity handle(IOException ex) { // ... }

Handling exception globally in a controller advice class.
Applying globally and across all @RequestMapping methods when defined with an @ControllerAdvice class or @RestContollerAdvice.

Annotating Business Exceptions with @ResponseStatus
A business exception can be annotated with @ResponseStatus. When the exception is raised, the ResponseStatusExceptionResolver handles it by setting the status of the response accordingly. By default, the DispatherServlet registers the ResponseStatusExceptionResolver and it is available for use.

Controller advice:

It is an aspect implementation relating to common concerns of controllers. If applying @ExceptionHandler, @ModelAttribute, and @InitBinder globally across all controllers, then you need to declare then within the class decorated with @ControllerAdvice or @RestControllerAdvice.

The controller advice class is applied on every request, every controller; meanwhile, it allows to specify certain types of controllers(@Controller or @RestController), only for certain packages, or specific controllers. @ControllerAdvice(assignableTypes={A.class,B.class}).

On startup, the infrastructure classes for @RequestMapping and @ExceptionHandler methods detect Spring beans annotated with @ControllerAdvice and then apply their methods at runtime. Global @ExceptionHandler methods (from a @ControllerAdvice) are applied after local ones (from the @Controller). By contrast, global @ModelAttribute and @InitBinder methods are applied before local ones.

Async Request Processing

The request may be blocked due to a heavy task, which takes a long time to process. Async request processing use Thread-1 to response Http Request thread, subsequently it uses Thread-2, which is A task executor thread in a thread pool, to handle the blocking task. The controller returns Callable or DeferredResult.

Set the Mvc async processing flag to be true, so as to enable the async processing. Spring boot enables async-request processing by default. So, we don't need concern about this.

Configuring async processing in web-mvc-configuration: ➊ declare async task executor bean; ❷ set task executor within the asyncSupportConfigurer.

@Override

protected void configureAsyncSupport(AsyncSupportConfigurer asyncSupportConfigurer) {
    asyncSupportConfigurer.setDefaultTimeout(10000);

    asyncSupportConfigurer.setTaskExecutor(mvcAsyncTaskExecutor());}

@Bean

public AsyncTaskExecutor mvcAsyncTaskExecutor() {
    ThreadPoolTaskExecutor threadPoolTaskExecutor = new ThreadPoolTaskExecutor();

    threadPoolTaskExecutor.setThreadNamePrefix("hplusapp-thread-");

    return threadPoolTaskExecutor;}

View Resolver

The view resolver provides a mapping between view names and actual views. The controller returns a view name in a string. According to the name, view resolver picks up the view template from a pre-defined folder, and then return to the client as an HTTP response.

There are many types of view resolvers:

InternalResourceViewResolver is used to pick up the JSP template in a correct folder in the project.
this is used to map a view name to its JSPs.

Employing a properties file to resolve views, which is done by a ResourceBundleViewResolver.
Meaning that defining all view names and map it to the correct JSPs in a properties file.

XmlViewResolver: implementation of ViewResolver that accepts a configuration file written in XML with the same DTD as Spring's XML bean factories.

VelocityViewResolver/FreeMarkerViewResolver
Convenient subclass of UrlBasedViewResolver that supports FreeMarkerView and custom subclasses of them.

Interceptor

The concept of interceptions in Spring MVC is very similar to the filter components in the Servlet JSP API, which is used for pre- and post-processing of the request.

Built-in and customer interceptors

ThemChangeTnterceptor
LocalChangeInterceptor
Custom interceptors should extend HandlerInterceptorAdaper

Custom interceptors need to be registered in WebConfig class that implements
WebMvcConfigurerSupport

@Overrideprotected void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(new LoggingInterceptor()).addPathPatterns("/*");

    registry.addInterceptor(new ThemeChangeInterceptor());}

Session

A session may link several controllers.

@SessoinAttributes (used in class level)

Themes

An application may have different themes. A theme stands for a different feel and a look of the view, which is defined by different CSS, images, icon ket, and font kit etc.

Define theme using org.springframework.ui.context.ThemeSource.
The default implementation is ResourceBundleThemeSource.
ThemeResolver decides which theme to use

CookieThemeResolver
SessionThemeResolver
FixedThemeResolver

Create theme properties file under the resource folder.
In ApplicationConfig, register ThemChangeInterceptor and creating bean ThemeResolver.
Used to refer themed keys from .properties file on the JSP.

L10n and i18n

Problem: common label or message may be fetched from a central place. Language may be presented differently in different countries.

LocaleResolver into play
Default implementation: AcceptHeaderLocaleResolver
Add message properties files for different locales on the classpath.

In spring boot defines messages-langShortName.properties
language short name is here i8n code
fx: for Swedish, its short name is 'sv', and then the name for 'properties' file should be
messages-sv.properties

Creating message property files, key-value standing for the same label but different languages.
Note:
In IntelliJ, finding File Encoding file, making sure default property file encoding is UTF-8, and also

including the 'Global encoding' and 'Project encoding'.

Chrome: settings: language. order preference of language

LocalResolver and CookieLocaleInterceptor
default key = 'locale'

Rest Controller

Access resource on the web; return data (ResponseEntity); MVC controller return view name;

Injecting Custom Arguments

When using Spring MVC you can add certain arguments to your controllers and the framework injects those arguments for you, fx: HttpServletRequest, Model, Locale, OutputStream etc.

Spring MVC provides us with an interface designed to allow us to inject parameters to our controller methods: HandlerMethodArgumentResolver.

Injecting custom method arguments
Inject your custom method argument in Spring MVC using HandlerMethodArgumentResolver

References:

Using Http Session With Spring Based Web Applications

Spring WebApplicationInitializer tutorial

Sunday, 22 December 2019

JVM Memory Management

Escaping Reference

Java passing variable to a method by a copy of variable or a copy of the reference that points to the object located in the heap. If exposing a reference, meaning that the instance may be musted unexpectedly. thus we need to escape reference.

Garbage
Stack: reference; (stack overflow exception)
Heap: instance (running out memory exception)

when an instance in heap has no reference pointing to it, then this instance is eligible garbage.

Analysing Tool
Goto JDK bin folder, find the application 'jvisualvm' and run it.
It is a visualizing tool to show heap memory (used and unused).

The curve used heap memory may indicate the trend of memory leak.

Garbage Collection Process

java may automatically free memory as objects are not used any more.
it is called 'mark and sweep', consisting of two processes; 1) marking instances that need to be retained and 2) then sweeping those that no needed any more.

Before implementing this process, all threads need to be stopped. (this is the downside of GC)
After that, Checking the references on the stack; marking the instance it is pointing to, and the instances it depends on.

Heap Generations

For solving GC freezing(all threads need to be stopped as carrying out GC.)
Heap memory is classified into the young generation and the old generation.
If an object survives from a GC, then its life cycle may last until the end of the application.

the new object is created in the young generation space. (minor collection)
the surviving object is copied into the olde generation space. (major collection)

PermGen and MetaData

Java 6
Heap memory:
the young generation, old generation, and permanent generation(string and class metadata)

Java 7
the string is moved to the old generation.

From Java 8
class metadata is moved to a separate space, called metaspace, which is not part of heap memory any more. meaning that it has no size limitation any more.

Tunning JVM
setting up the max heap size: -Xmx512m; start heap size: -Xms125m
java doc shows default heap size = 256mb

Before java 8, PermGen has been removed from java 8
Max PermGen Size: -XX=256M

-verbose:gc print out to console when a GC takes place
-Xmn256m set young generation size
-XX:HeapDumpOnOutOfMemory creating a heap dump file.

different type of garbage collector
-XX:+UseSerialGC serial: using a single thread :
-XX:+UseParrelGC parallel: using multiple threads
-XX:+UseConcMarkSweepGC
-XX:+UseG1GC

Sunday, 13 October 2019

Could not extract response: no suitable HttpMessageConverter found for response type [class dk.enettet.evu.core.model.Address] and content type [application/octet-stream]

Could not extract response: no suitable HttpMessageConverter found for response type [class dk.enettet.evu.core.model.Address] and content type [application/octet-stream]
org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class dk.enettet.evu.core.model.Address] and content type [application/octet-stream]
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:121)
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:994)
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:977)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:737)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:670)
at org.springframework.web.client.RestTemplate.getForEntity(RestTemplate.java:338)
at org.springframework.boot.test.web.client.TestRestTemplate.getForEntity(TestRestTemplate.java:275)
at dk.enettet.evu.security.AuthenticationAndAuthorisationTest.given a wrong username but a right password resulting in an authentication failure(AuthenticationAndAuthorisationTest.kt:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:532)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:171)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:167)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:114)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$4(NodeTestTask.java:108)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$4(NodeTestTask.java:112)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$4(NodeTestTask.java:112)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:98)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:74)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:102)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:82)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:78)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
at com.sun.proxy.$Proxy2.stop(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.stop(TestWorker.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:175)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:157)
at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
at java.lang.Thread.run(Thread.java:748)

MockMvc: testing from the server side, simulated servlet dispatcher, but not a container.

RestTemplate: testing like from client side;

TestRestTemplate:

For my case, the error is due to the response entity data type is not correctly defined; so it confused the json converter. It received an object type A, but it is required to be converted to type B. So it may throw this specific exception.

@Testfun `given right username and password, but not allowed to access this resource, resulting in an authorisation failure`() {
    val response: ResponseEntity = testTemplate.withBasicAuth("testName1", "test1")
            .getForEntity(resource, String::class.java)
    assertThat(response.statusCode, `is`(HttpStatus.FORBIDDEN))
}

@Testfun `given right username and password, but allowed to access the resource, resulting in an ok status`() {
    val response: ResponseEntity