com.gxl.shark.resources.conn.ZookeeperConnectionManager.java Source code

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Here is the source code for com.gxl.shark.resources.conn.ZookeeperConnectionManager.java

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/*
 * Copyright 2015-2101 gaoxianglong
 *
 * 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.gxl.shark.resources.conn;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import javax.annotation.Resource;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.Watcher.Event.KeeperState;
import org.apache.zookeeper.ZooKeeper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.gxl.shark.exception.ResourceException;
import com.gxl.shark.resources.register.zookeeper.node.RegisterNode;

/**
 * ?,zookeeper?session?
 * 
 * @author gaoxianglong
 * 
 * @version 1.3.7
 */
public class ZookeeperConnectionManager {
    private String zk_address;
    private int zk_session_timeout;
    private CountDownLatch countDownLatch;
    private ZooKeeper zk_client;
    private String nodePath;
    @Resource(name = "registerDataSourceNode")
    private RegisterNode registerNode;
    private Logger logger = LoggerFactory.getLogger(ZookeeperConnectionManager.class);

    private ZookeeperConnectionManager(String zk_address, int zk_session_timeout, DataSourceBean dataSourceBean) {
        this(zk_address, zk_session_timeout, dataSourceBean.getNodePath());
    }

    private ZookeeperConnectionManager(String zk_address, int zk_session_timeout, String nodePath) {
        this.zk_address = zk_address;
        this.zk_session_timeout = zk_session_timeout;
        this.nodePath = nodePath;
        countDownLatch = new CountDownLatch(1);
    }

    /**
     * ?
     *
     * @author JohnGao
     */
    @SuppressWarnings("unused")
    private void init() {
        connection();
    }

    /**
     * zookeeper
     * 
     * @author JohnGao
     */
    private void connection() {
        try {
            zk_client = new ZooKeeper(zk_address, zk_session_timeout, new Watcher() {
                @Override
                public void process(WatchedEvent event) {
                    final KeeperState STATE = event.getState();
                    final String VALUE = "zookeeper?[" + zk_address + "]";
                    switch (STATE) {
                    case SyncConnected:
                        countDownLatch.countDown();
                        logger.info(VALUE + "?");
                        break;
                    case Disconnected:
                        logger.warn(VALUE + "?");
                        break;
                    case Expired:
                        logger.error(VALUE + "??");
                        break;
                    case AuthFailed:
                        logger.error(VALUE + "?ACL?");
                    default:
                        break;
                    }
                }
            });
            countDownLatch.await();
            /* ?? */
            registerNode.register(zk_client, nodePath);
        } catch (IOException e) {
            throw new ResourceException("zookeeper?[" + e.toString() + "]");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}