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/**
 * Copyright (c) 2011-2013, kidzhou 周磊 ([email protected])
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.janeluo.jfinalplus.plugin.jms;

import com.jfinal.log.Log;
import org.apache.activemq.ActiveMQConnectionFactory;

import javax.jms.*;
import java.io.Serializable;
import java.util.concurrent.TimeUnit;

public class TopicPublisher {

    protected final Log logger = Log.getLog(getClass());

    protected String serverUrl;
    protected String username;
    protected String password;
    protected String topicName;
    protected int reConnectTimes;
    protected int reConnectInterval;

    private Connection connection;
    private Session session;
    private Destination destination;
    private MessageProducer producer;

    public TopicPublisher(String serverUrl, String username, String password, String topicName) {
        this.serverUrl = serverUrl;
        this.username = username;
        this.password = password;
        this.topicName = topicName;
        initConnection();
    }

    public TopicPublisher(String serverUrl, String username, String password, String topicName, int reConnectTimes,
            int reConnectInterval) {
        this(serverUrl, username, password, topicName);
        this.reConnectTimes = reConnectTimes;
        this.reConnectInterval = reConnectInterval;
    }

    private void initConnection() {
        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(serverUrl);
        try {
            connection = factory.createConnection(username, password);
            connection.start();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            destination = session.createTopic(topicName);
            producer = session.createProducer(destination);
            producer.setTimeToLive(10L);
        } catch (JMSException e) {
            logger.error("init publisher error", e);
        }
    }

    public boolean publishMessage(Serializable object, int msgType) {
        try {
            if (session == null) {
                if (!reConnect()) {
                    logger.debug("cant connected to JMS server");
                    return false;
                }
            }
            logger.debug("publish message, msg_type:" + msgType);
            ObjectMessage om = session.createObjectMessage(object);
            om.setIntProperty(JMSConstants.JMS_MESSAGE_TYPE, msgType);
            producer.send(om);
        } catch (JMSException e) {
            logger.error("publish message error", e);
            return false;
        }
        return true;
    }

    private boolean reConnect() {
        int times = reConnectTimes;
        while (times-- > 0) {
            logger.debug("reConnectTimes" + times);
            initConnection();
            if (session != null) {
                return true;
            }
            try {
                TimeUnit.MINUTES.sleep(reConnectInterval);
            } catch (InterruptedException e) {
                logger.error(e.getMessage(), e);
            }
        }
        return false;
    }

    public void closeConnection() {
        if (producer != null) {
            try {
                producer.close();
            } catch (JMSException e) {
                logger.error(e.getMessage(), e);
            }
        }
        if (session != null) {
            try {
                session.close();
            } catch (JMSException e) {
                logger.error(e.getMessage(), e);
            }
        }
        if (connection != null) {
            try {
                connection.close();
            } catch (JMSException e) {
                logger.error(e.getMessage(), e);
            }
        }
    }
}