DeliveryWork.java

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package connector;

import java.lang.reflect.Method;

import javax.resource.spi.endpoint.MessageEndpoint;
import javax.resource.spi.work.Work;

/**
 * 
 * @author Qingqing Ouyang
 */
public class DeliveryWork implements Work {

    private MessageEndpoint ep;
    private int num;
    private String op;
    private boolean keepCount;
    private static int counter = 0;

    public DeliveryWork(MessageEndpoint ep, int numOfMessages, String op) {
        this.ep = ep;
        this.num = numOfMessages;
        this.op = op;
        this.keepCount = false;
    }

    public DeliveryWork(MessageEndpoint ep, int numOfMessages, String op,
            boolean keepCount) {
        this.ep = ep;
        this.num = numOfMessages;
        this.op = op;
        this.keepCount = keepCount;
    }

    public void run() {

        debug("ENTER...");

        try {
            // Method onMessage = getOnMessageMethod();
            // ep.beforeDelivery(onMessage);

            if (!keepCount) {
                for (int i = 0; i < num; i++) {
                    String msgId = String.valueOf(i);
                    String msgBody = "This is message " + msgId;
                    String msg = msgId + ":" + msgBody + ":" + op;
                    ((MyMessageListener) ep).onMessage(msg);
                }
            } else {
                for (int i = 0; i < num; i++) {
                    String msgId = String.valueOf(i + counter);
                    String msgBody = "This is message " + msgId;
                    String msg = msgId + ":" + msgBody + ":" + op;
                    ((MyMessageListener) ep).onMessage(msg);
                }
                counter = counter + num;
            }

            // ep.afterDelivery();

        } catch (Exception ex) {
            ex.printStackTrace();
        }

        debug("LEAVE...");
    }

    public void release() {
    }

    public String toString() {
        return op;
    }

    private Method getOnMessageMethod() {

        Method onMessageMethod = null;
        try {
            Class msgListenerClass = connector.MyMessageListener.class;
            Class[] paramTypes = { java.lang.String.class };
            onMessageMethod = msgListenerClass.getMethod("onMessage",
                    paramTypes);

        } catch (NoSuchMethodException ex) {
            ex.printStackTrace();
        }
        return onMessageMethod;
    }

    private void debug(String mesg) {
        System.out.println("DeliveryWork[" + op + "] --> " + mesg);
    }
}