Beehive Integration in WebLogic Server 9.1

Code Samples for Annotation Overrides

This appendix contains the complete code for the files used or referred to in Annotation Overrides.

MyControl.java

package controls; 

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import org.apache.beehive.controls.api.bean.AnnotationMemberTypes;
import org.apache.beehive.controls.api.bean.ControlInterface;

import org.apache.beehive.controls.api.bean.AnnotationMemberTypes.Date;
import org.apache.beehive.controls.api.bean.AnnotationMemberTypes.Decimal;
import org.apache.beehive.controls.api.bean.AnnotationMemberTypes.Optional;

import org.apache.beehive.controls.api.properties.PropertySet;
import weblogic.controls.annotations.RequiresEncryption;

@ControlInterface
public interface MyControl
{
  public String getAnnotationValue();
}

MyControlImp.java

package controls; 

import java.lang.reflect.Method;
import java.io.Serializable;
import org.apache.beehive.controls.api.bean.ControlImplementation;

import org.apache.beehive.controls.api.bean.Extensible;
import org.apache.beehive.controls.api.bean.ControlBean;
import org.apache.beehive.controls.api.context.Context;
import org.apache.beehive.controls.api.context.ControlBeanContext;

@ControlImplementation
public class MyControlImpl implements MyControl, Extensible, Serializable
{
    @Context
    ControlBeanContext ctx;
    
    public String getAnnotationValue() {

        // This is a key part. The control framework will make sure
        // that the precendence is followed when look up annotation
        // values for MyAnnotation
        MyAnnotation myAnnotation =
            ctx.getControlPropertySet(MyAnnotation.class);

        return myAnnotation.value();
    }
    
    public Object invoke(Method method, Object[] args) throws Throwable
    {
        // Control Extension not defined for simplicity
        return null;
    }
}

MyAnnotation.java

package controls; 

import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import org.apache.beehive.controls.api.properties.PropertySet;
import org.apache.beehive.controls.api.bean.AnnotationConstraints.AllowExternalOverride;

@PropertySet(externalConfig=true)
@AllowExternalOverride
@Retention(RetentionPolicy.RUNTIME)
public @interface MyAnnotation
{
    String value() default "DEFAULT";
}

MyJcx.java

package controls; 

import org.apache.beehive.controls.api.bean.ControlExtension;

@ControlExtension
@MyAnnotation("OnClassDecl")
public interface MyJcx extends MyControl
{
}

HelloService.java

/**
 * This class demonstrates the use of an override-able annotation
 * on a control instance. The field "_jcxBean" was declared with
 * MyAnnotation, which has an initial value of "Overriden@Field".
 * During runtime, the sayHello() method will actually return a
 * value that has been externally overriden via a deployment plan.
 *
 * There is no code change required for this class in order to
 * obtain a new externally-configured value.
 */
package service;

import javax.jws.WebService;
import javax.jws.WebMethod;
import javax.jws.soap.SOAPBinding;

import weblogic.jws.WLHttpTransport;
import org.apache.beehive.controls.api.bean.Control;
import controls.*;

@WebService(name="Hello")
@SOAPBinding(style=SOAPBinding.Style.RPC, use=SOAPBinding.Use.ENCODED)
@WLHttpTransport(contextPath="helloJWS", serviceUri="HelloService")        
public class HelloService
{
    @Control()
    @MyAnnotation("Overriden@Field")        
    protected MyJcxBean _jcxBean;

    @WebMethod
    public String sayHello()
    {
        return _jcxBean.getAnnotationValue();
    }
}