com.liferay.portal.messaging.proxy.MessagingProxyAdvice.java Source code

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Here is the source code for com.liferay.portal.messaging.proxy.MessagingProxyAdvice.java

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/**
 * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.messaging.proxy;

import com.liferay.portal.kernel.messaging.Message;
import com.liferay.portal.kernel.messaging.proxy.BaseProxyBean;
import com.liferay.portal.kernel.messaging.proxy.ProxyRequest;
import com.liferay.portal.kernel.messaging.proxy.ProxyResponse;
import com.liferay.portal.kernel.messaging.sender.SingleDestinationMessageSender;
import com.liferay.portal.kernel.messaging.sender.SingleDestinationSynchronousMessageSender;
import com.liferay.util.aspectj.AspectJUtil;

import java.util.Map;

import org.aspectj.lang.ProceedingJoinPoint;

/**
 * @author Michael C. Han
 * @author Brian Wing Shun Chan
 * @author Shuyang Zhou
 */
public class MessagingProxyAdvice {

    public Object invoke(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {

        Message message = new Message();

        ProxyRequest proxyRequest = createProxyRequest(proceedingJoinPoint);

        message.setPayload(proxyRequest);

        Map<String, Object> messageValues = MessageValuesThreadLocal.getValues();

        if (!messageValues.isEmpty()) {
            for (String key : messageValues.keySet()) {
                message.put(key, messageValues.get(key));
            }
        }

        BaseProxyBean baseProxyBean = (BaseProxyBean) proceedingJoinPoint.getTarget();

        if (proxyRequest.isSynchronous() || ProxyModeThreadLocal.isForceSync()) {

            return doInvokeSynchronous(message, baseProxyBean);
        } else {
            doInvokeAsynchronous(message, baseProxyBean);

            return null;
        }
    }

    protected ProxyRequest createProxyRequest(ProceedingJoinPoint proceedingJoinPoint) throws Exception {

        return new ProxyRequest(AspectJUtil.getMethod(proceedingJoinPoint), proceedingJoinPoint.getArgs());
    }

    protected void doInvokeAsynchronous(Message message, BaseProxyBean baseProxyBean) {

        SingleDestinationMessageSender messageSender = baseProxyBean.getSingleDestinationMessageSender();

        if (messageSender == null) {
            throw new IllegalStateException("Asynchronous message sender was not configured properly for "
                    + baseProxyBean.getClass().getName());
        }

        messageSender.send(message);
    }

    protected Object doInvokeSynchronous(Message message, BaseProxyBean baseProxyBean) throws Exception {

        SingleDestinationSynchronousMessageSender messageSender = baseProxyBean
                .getSingleDestinationSynchronousMessageSender();

        if (messageSender == null) {
            throw new IllegalStateException("Synchronous message sender was not configured properly for "
                    + baseProxyBean.getClass().getName());
        }

        ProxyResponse proxyResponse = (ProxyResponse) messageSender.send(message);

        if (proxyResponse == null) {
            return null;
        } else if (proxyResponse.hasError()) {
            throw proxyResponse.getException();
        } else {
            return proxyResponse.getResult();
        }
    }

}