ApplicationEventMulticaster not initialized - call 'refresh' before multicast events

Question

I try to implement ehcache for my application, but when I try to call the server, I get the following error -

 java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: WebApplicationContext for namespace 'dispatcher-servlet': startup date [Thu Apr 16 14:37:53 IST 2015]; root of context hierarchy at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:344) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:331) at org.springframework.web.servlet.FrameworkServlet.publishRequestHandledEvent(FrameworkServlet.java:1061) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:996) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) at javax.servlet.http.HttpServlet.service(HttpServlet.java:620) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Unknown Source) 

The steps I took are

STEP1 - created ehcache.xml file under /src/main/resources , as seen below -

 <?xml version="1.0" encoding="UTF-8"?> <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="true" monitoring="autodetect" dynamicConfig="true"> <diskStore path="java.io.tmpdir" /> <cache name="movieFindCache" maxEntriesLocalHeap="10000" maxEntriesLocalDisk="1000" eternal="false" diskSpoolBufferSizeMB="20" timeToIdleSeconds="300" timeToLiveSeconds="600" memoryStoreEvictionPolicy="LFU" transactionalMode="off"> <persistence strategy="localTempSwap" /> </cache> </ehcache> 

STEP2 - added the following to appconfig.java

 @Bean public CacheManager getEhCacheManager(){ return new EhCacheCacheManager(getEhCacheFactory().getObject()); } @Bean public EhCacheManagerFactoryBean getEhCacheFactory(){ EhCacheManagerFactoryBean factoryBean = new EhCacheManagerFactoryBean(); factoryBean.setConfigLocation(new ClassPathResource("ehcache.xml")); factoryBean.setShared(true); return factoryBean; } 

STEP3 - added the following to webappinitializer.java , which is called at startup

 AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext(); ctx.register(AppConfig.class); ctx.register(HibernateConfiguration.class); ctx.setServletContext(servletContext); Dynamic dynamic = servletContext.addServlet("dispatcher", new DispatcherServlet(ctx)); dynamic.setLoadOnStartup(1); 

STEP4 - pom.xml contains -

 <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>4.0.6.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>4.0.6.RELEASE</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.3.8.Final</version> </dependency> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> <version>2.9.0</version> </dependency> <!-- Optional, to log stuff --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.0.13</version> </dependency> <!-- Spring caching framework inside this --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.1.4.RELEASE</version> </dependency> <!-- Support for Ehcache and others --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>4.1.4.RELEASE</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-osgi</artifactId> <version>4.3.8.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-envers</artifactId> <version>4.3.8.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-c3p0</artifactId> <version>4.3.8.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-proxool</artifactId> <version>4.3.8.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-infinispan</artifactId> <version>4.3.8.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>4.3.8.Final</version> </dependency> 

I can not understand the root cause of the above error. Any help is appreciated.

Answer 1

This is pretty stupid, but my problem was that I placed the @SpringBootApplication class (namely App, Application, WebApplication in most projects) inside the default package. Consequently, everything was in complete disarray.

I'm not sure why this exact error appeared, but moving the application class to the package necessarily fixed it.

Answer 2

The idea of ​​spring-boot is that all configurations are done automatically with spring.

In this case, use the following POM.

  <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.2.3.RELEASE</version> </parent> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> <version>2.9.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> </dependencies> 

Add the following application.properties properties to the src / main / resources application.

 spring.datasource.url=jdbc:mysql://localhost:3306/soschema spring.datasource.username=root spring.datasource.password=root123 spring.datasource.driver-class-name=com.mysql.jdbc.Driver # Specify the DBMS spring.jpa.database = MYSQL # Show or not log for each sql query spring.jpa.show-sql = true # Hibernate settings are prefixed with spring.jpa.hibernate.* spring.jpa.hibernate.ddl-auto = update spring.jpa.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect spring.jpa.hibernate.naming_strategy = org.hibernate.cfg.ImprovedNamingStrategy 

Add the Appconfig file,

 package org.arunm.ehcacheconfig; import org.springframework.cache.CacheManager; import org.springframework.cache.ehcache.EhCacheCacheManager; import org.springframework.cache.ehcache.EhCacheManagerFactoryBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.io.ClassPathResource; @Configuration public class AppConfig { @Bean public CacheManager getEhCacheManager(){ return new EhCacheCacheManager(getEhCacheFactory().getObject()); } @Bean public EhCacheManagerFactoryBean getEhCacheFactory(){ EhCacheManagerFactoryBean factoryBean = new EhCacheManagerFactoryBean(); factoryBean.setConfigLocation(new ClassPathResource("ehcache.xml")); factoryBean.setShared(true); return factoryBean; } } 

Add a top level class with the following code,

 package org.ehcachetest; import java.util.Arrays; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.ComponentScan; /** * Hello world! * */ @EnableAutoConfiguration @ComponentScan public class App { public static void main( String[] args ) { ApplicationContext ctx = SpringApplication.run(App.class, args); String[] beanNames = ctx.getBeanDefinitionNames(); Arrays.sort(beanNames); for (String beanName : beanNames) { System.out.println(beanName); } } } 

If you run the application in the main method, you will find that spring automatically created sessionFactory, TransactionManager, etc. for you. There is no need for any manual configuration, which means that there is no need to add a supervisor, sleep configuration, etc. Everything is driven by spring.