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The Spring Mediator exposes a spring bean as a mediator. The Spring Mediator creates an instance of a mediator, which is managed by Spring. This Spring bean must implement the Mediator interface for it to act as a Mediator.

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Syntax

<spring:spring bean="exampleBean" key="string"/>

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Example

<spring:spring bean="springtest" key="conf/sample/resources/spring/springsample.xml"/>

In the above configuration, spring XML is in the registry and it can be looked up using the registry key conf/sample/resources/spring/springsample.xml. This spring XML (i.e springsample.xml) must contain a bean with the name springtest. The following figure shows an example that can be used as the registry resource - springsample.xml.

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="springtest" class="org.apache.synapse.mediators.spring.SpringTestBean" singleton="false">
<property name="testProperty" value="100"/>
</bean>
</beans>

Also, you need to build the JAR file of the following Spring Bean class and place it in the <ESB_HOME>/repository/components/lib/ directory.

package org.apache.synapse.mediators.spring;

import org.apache.synapse.MessageContext;
import org.apache.synapse.mediators.AbstractMediator;

public class SpringTestBean extends AbstractMediator{
   private String testProperty;

   public void setTestProperty(String testProperty){
      this.testProperty = testProperty;
   }

   public boolean mediate(MessageContext mc) {
            // Do somthing useful..
            // Note the access to the Synapse Message context
            return true;
   }
}

For more examples, see Mediating with Spring.