ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events

Question

I am trying to implement ehcache for my application but when try invoking the server, getting the following error -

java.lang.IllegalStateException         


        

Answer 1

The idea behind spring-boot is that all the configurations are done automatically by spring.

In you case use the following POM.

 
        org.springframework.boot
        spring-boot-starter-parent
        1.2.3.RELEASE
    

     
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

  
    
      junit
      junit
      3.8.1
      test
    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
           org.springframework
           spring-context-support
        
        
           org.springframework
           spring-context-support
        
        
            mysql
            mysql-connector-java
            runtime
        
        
        net.sf.ehcache
        ehcache
        2.9.0
    
    
            org.springframework.boot
            spring-boot-starter-data-jpa
        
  

Add the following application.properties in your src/main/resources.

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 App the main method you will find that spring has automatically created the sessionFactory, TransactionManager etc for you. There is no need for any manual configuration which means there is no need to add the dispatcherservlet, your hibernate config etc. Everything is managed by spring.