SCA Spring in Weblogic 10.3.2 & Soa Suite 11g

With Weblogic 10.3.2 ( part of Patch Set 1 of Fusion Middleware R1 ) Oracle released a preview of SCA Spring. For more info about this announcement see the blog of Raghav.
This is great news because everything what works in SCA Spring can be used without any problem in Soa Suite 11g. With Patch Set 2 SCA Spring will be supported in WLS or Soa Suite. For a Soa Suite Spring example see this blog of Clemens

To test this I made a small example based on the blog of Clemens. In this test I will call a logging webservice and this service will pass the call to a passthrough bean which has a reference to an logging EJB service which calls a logging bean and this bean has an other bean injected which does the output.

First deploy the weblogic-sca war as a library to the WLS server, you can find this war in wlserver_10.3/common/deployable-libraries/ folder and is called weblogic-sca-1.0.war

Create in JDeveloper a new web project ( no need for ADF ) . We don't need the spring jar or add some config in the web.xml ( this can be empty , don't need to add spring listener )

Add a library reference in your webapp to the weblogic-sca library, Do this in the weblogic.xml or weblogic-application.xml file

<?xml version = '1.0' encoding = 'windows-1252'?>
<weblogic-web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://www.bea.com/ns/weblogic/weblogic-web-app http://www.bea.com/ns/weblogic/weblogic-web-app/1.0/weblogic-web-app.xsd"
                 xmlns="http://www.bea.com/ns/weblogic/weblogic-web-app">
   <library-ref>
       <library-name>weblogic-sca</library-name>
   </library-ref>
</weblogic-web-app>

Create a spring from jdeveloper and call this file spring-context.xml and put this in META-INF/jsca folder ( in the src folder )
When you got experience with Apache Tuscany then this spring configuration is not so difficult.

<?xml version="1.0" encoding="windows-1252" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:sca="http://xmlns.oracle.com/weblogic/weblogic-sca"
      xmlns:wlsb="http://xmlns.oracle.com/weblogic/weblogic-sca-binding"
      xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://xmlns.oracle.com/weblogic/weblogic-sca http://xmlns.oracle.com/weblogic/weblogic-sca/1.0/weblogic-sca.xsd http://xmlns.oracle.com/weblogic/weblogic-sca-binding http://xmlns.oracle.com/weblogic/weblogic-sca-binding/1.0/weblogic-sca-binding.xsd">
 <!--Spring 2.5 Bean defintions go here-->
 <sca:service target="loggerPassThrough" name="LogServiceWS"
              type="nl.whitehorses.wls.sca.spring.ILoggerComponent">
   <wlsb:binding.ws xmlns="http://xmlns.oracle.com/sca/1.0"
               name="LoggerService_WS" uri="/LoggerService_Uri"
               port="LoggerService_PORT"/>
 </sca:service>

 <sca:reference name="loggerEJBReference"
 type="nl.whitehorses.wls.sca.spring.ILoggerComponent">
   <wlsb:binding.ejb uri="LoggerService_EJB30_JNDI" />
 </sca:reference>

 <bean class="nl.whitehorses.wls.sca.spring.LoggerPassThrough" name="loggerPassThrough">
    <property name="reference" ref="loggerEJBReference" />
 </bean>

 <sca:service target="logger" name="LogServiceEJB"
              type="nl.whitehorses.wls.sca.spring.ILoggerComponent">
   <wlsb:binding.ejb uri="LoggerService_EJB30_JNDI" remote="true"
                     name="LoggerService_EJB"/>
 </sca:service>

 <bean class="nl.whitehorses.wls.sca.spring.LoggerComponentImpl" name="logger">
    <property name="output" ref="loggerOutput" />
 </bean>

 <bean id="loggerOutput" class="nl.whitehorses.wls.sca.spring.LoggerOutput"></bean>

</beans>

Now we need to create a logger interface, this will be use by the WS & EJB services and references.

package nl.whitehorses.wls.sca.spring;

public interface ILoggerComponent
{
   
    /**
     * Log a message, including the originating component, its instance id and
     * a message.
     * @param pComponentName the name of the component that sends this log msg
     * @param pInstanceId the instanceId of the component instance
     * @param pMessage the message to be logged
     */
    public void log (String pComponentName,
                     String pInstanceId, String pMessage);
}

Create a passthrough class this will pass on the logger call to the ejb service.

package nl.whitehorses.wls.sca.spring;

public class LoggerPassThrough implements ILoggerComponent {
    public LoggerPassThrough() {
        super();
    }

    @Override
    public void log(String pComponentName, String pInstanceId,
                    String pMessage)  {
    
       reference.log(pComponentName, pInstanceId, pMessage);
    }

    private ILoggerComponent reference;

    public void setReference(ILoggerComponent reference) {
        this.reference = reference;
    }

    public ILoggerComponent getReference() {
        return reference;
    }

}

Create the logger implementation class.

package nl.whitehorses.wls.sca.spring;

public class LoggerComponentImpl implements ILoggerComponent {
    public LoggerComponentImpl() {
        super();
    }

    @Override
    public void log(String pComponentName, String pInstanceId,
                    String pMessage)  {
       output.logToConsole(pComponentName, pInstanceId, pMessage);
    }

    private LoggerOutput output;

    public void setOutput(LoggerOutput output) {
        this.output = output;
    }

    public LoggerOutput getOutput() {
        return output;
    }
}

The last class prints the console output

package nl.whitehorses.wls.sca.spring;

public class LoggerOutput {
    public LoggerOutput() {
        super();
    }
    
    public void logToConsole(String pComponentName, String pInstanceId,  String pMessage)
    {
        StringBuffer logBuffer = new StringBuffer ();
        logBuffer.append("[").append(pComponentName).append("] [Instance: ").
            append(pInstanceId).append("] ").append(pMessage);
        
        System.out.println(logBuffer.toString());
    }
}

Deploy the web application the weblogic server and use soapui to test the service. The wsdl url is in my case http://laptopedwin.wh.lan:7001/WlsSpring-ScaSpring-context-root/LoggerService_Uri?WSDL or make a EJB test client and use this ILoggerComponent logger = (ILoggerComponent)context.lookup("LoggerService_EJB30_JNDI");

Here you can download my code on github https://github.com/biemond/jdev11g_examples/tree/master/WlsSpring