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package com.sun.enterprise.connectors.inflow;
import com.sun.ejb.MessageBeanListener;
import com.sun.ejb.MessageBeanProtocolManager;
import com.sun.enterprise.J2EETransactionManager;
import com.sun.enterprise.Switch;
import com.sun.enterprise.connectors.ConnectorConstants;
import com.sun.logging.LogDomains;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.enterprise.Switch;
import com.sun.enterprise.admin.monitor.callflow.*;
/**
* This class handles the implementation of two interfaces:
* 1) javax.resource.spi.endpoint.MessageEndpoint;
* 2) any message listener type (e.g. javax.jms.MessageListener,
* OR javax.xml.messaging.OnewayListener)
*
* @author Qingqing Ouyang
*/
public final class MessageEndpointInvocationHandler
implements InvocationHandler {
private MessageBeanListener listener_;
private boolean beforeDeliveryCalled = false;
private boolean throwTransactedExceptions_ = true;
private MessageBeanProtocolManager messageBeanPM_;
private static final String MESSAGE_ENDPOINT
= "javax.resource.spi.endpoint.MessageEndpoint";
private static final String THROW_TRANSACTED_EXCEPTIONS_PROP
= "resourceadapter.throw.transacted.exceptions";
private static final Logger logger =
LogDomains.getLogger(LogDomains.RSR_LOGGER);
private final Agent callFlowAgent = Switch.getSwitch().getCallFlowAgent();
/**
* Constructs a MessageEndpointInvocationHandler.
*
* @param listener <code>MessageBeanListener</code> to deliver messages.
* @param pm Protocol object to MDB container.
*/
public MessageEndpointInvocationHandler(MessageBeanListener listener,
MessageBeanProtocolManager pm) {
this.listener_ = listener;
this.messageBeanPM_ = pm;
throwTransactedExceptions_ =
ConnectorConstants.THROW_TRANSACTED_EXCEPTIONS;
if( throwTransactedExceptions_ != true ) {
logger.info(ConnectorConstants.THROW_TRANSACTED_EXCEPTIONS_PROP +
" set to false");
}
}
/**
* Invokes the method
*
* @param proxy Object
* @param method <code>Method</code> to be executed.
* @param args Arguments
* @throws Throwable.
*/
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
// NOTE : be careful with "args" parameter. It is null
// if method signature has 0 arguments.
String methodClassName = method.getDeclaringClass().getName();
String methodName = method.getName();
Object returnValue = null;
if (logger.isLoggable(Level.FINEST)) {
String msg = "Invoking method [" + methodName
+ "] from class [" + methodClassName + "]";
logger.log(Level.FINEST, msg);
}
// delegate the beforeDelivery and afterDelivery calls
// to the MDB container
if (MESSAGE_ENDPOINT.equals(methodClassName)) {
if ("beforeDelivery".equals(methodName)) {
Method onMessageMethod = (Method) args[0];
beforeDeliveryCalled = true;
listener_.beforeMessageDelivery(onMessageMethod, false);
} else if ("afterDelivery".equals(methodName)) {
beforeDeliveryCalled = false; //reset
listener_.afterMessageDelivery();
} else if ("release".equals(methodName)) {
messageBeanPM_.destroyMessageBeanListener(listener_);
} else {
logger.log(Level.SEVERE, "endpointfactory.method_not_defined",
new Object[] {methodName, MESSAGE_ENDPOINT});
throw new RuntimeException(methodName);
}
} else if ("java.lang.Object".equals(methodClassName)) {
returnValue = invokeJavaObjectMethod(this, method, args);
} else { //the rest are considered methods for message delivery
//RA did not call beforeDelivery, handle it here
if (!beforeDeliveryCalled) {
J2EETransactionManager txManager =
Switch.getSwitch().getTransactionManager();
boolean txImported = (txManager.getTransaction() != null);
listener_.beforeMessageDelivery(method, txImported);
}
try {
//returnValue = listener_.deliverMessage(method, args);
// Notify Call Flow Agent.
try{
callFlowAgent.requestStart(
RequestType.REMOTE_ASYNC_MESSAGE);
callFlowAgent.startTime(
ContainerTypeOrApplicationType.EJB_CONTAINER);
// This is an opportunity to provide callerIPAddress and
// remote user name. But since this information is not
// currently available. So, we don't call
// callFlowAgent.setRequestInfo().
} catch (Exception ex){
logger.log(Level.WARNING, "Call Flow Agent threw exception" + ex);
}
returnValue = listener_.deliverMessage(args);
} catch (Throwable ex) {
if( messageBeanPM_.isDeliveryTransacted(method) ) {
if( throwTransactedExceptions_ ) {
throw ex;
} else {
logger.log(Level.INFO, "Resource adapter eating " +
" transacted exception", ex);
}
} else {
throw ex;
}
} finally {
// Send end notification to call flow agent
try{
callFlowAgent.endTime();
callFlowAgent.requestEnd();
} catch (Exception ex){
logger.log(Level.WARNING, "Call Flow Agent threw exception" + ex);
}
//assume that if the RA didn't call beforeDelivery, it
//would not call afterDelivery. o.w. it will be hard to
//to determine when to pair the afterDelivery call.
if (!beforeDeliveryCalled) {
listener_.afterMessageDelivery();
}
beforeDeliveryCalled = false;
}
}
return returnValue;
}
/**
* This is the same implementation in
* com.sun.ejb.container.InvocationHandlerUtil
* Need to abstract out at some point.
*/
private Object invokeJavaObjectMethod(
InvocationHandler handler, Method method, Object[] args)
throws RuntimeException {
Object returnValue = null;
// Can only be one of :
// boolean java.lang.Object.equals(Object)
// int java.lang.Object.hashCode()
// String java.lang.Object.toString()
//
// Optimize by comparing as few characters as possible.
switch( method.getName().charAt(0) ) {
case 'e' :
Object other = Proxy.isProxyClass(args[0].getClass()) ?
Proxy.getInvocationHandler(args[0]) : args[0];
returnValue = new Boolean(handler.equals(other));
break;
case 'h' :
returnValue = new Integer(handler.hashCode());
break;
case 't' :
returnValue = handler.toString();
break;
default :
throw new RuntimeException(method.getName());
}
return returnValue;
}
}
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