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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

Code Block
XML
XML

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

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Info
titleNote

You can configure the Mediator using XML. Click on "switch to source view" in the "Mediator" window.

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Example

Code Block
XML
XML

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

In the above configuration, the 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.

Code Block
XML
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.

Code Block
languagejava
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;
   }
}
Excerpt
hiddentrue

Description of the Spring Mediator in WSO2 ESB.

For more examples, see Mediating with Spring.