com.ery.estorm.zk.ZKAssign.java Source code

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Here is the source code for com.ery.estorm.zk.ZKAssign.java

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/**
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.ery.estorm.zk;

import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.data.Stat;

public class ZKAssign {
    private static final Log LOG = LogFactory.getLog(ZKAssign.class);

    public static String getNodePath(ZooKeeperWatcher zkw, String nodeName) {
        return ZKUtil.joinZNode(zkw.estormNodeZNode, nodeName);
    }

    public static String getNodeName(ZooKeeperWatcher zkw, String nodeName) {
        return nodeName.substring(zkw.estormNodeZNode.length() + 1);
    }

    public static String getTopologyPath(ZooKeeperWatcher zkw, String topName) {
        return ZKUtil.joinZNode(zkw.estormTopologyZNode, topName);
    }

    public static String getTopologyName(ZooKeeperWatcher zkw, String path) {
        return path.substring(zkw.estormTopologyZNode.length() + 1);
    }

    public static String getBakMasterServerPath(ZooKeeperWatcher zkw, String master) {
        return ZKUtil.joinZNode(zkw.estormBackupMasterAddressesZNode, master);
    }

    public static String getBakMasterServerName(ZooKeeperWatcher zkw, String path) {
        return path.substring(zkw.estormBackupMasterAddressesZNode.length() + 1);
    }

    public static byte[] getData(ZooKeeperWatcher zkw, String pathOrRegionName)
            throws KeeperException, IOException {
        String node = getPath(zkw, pathOrRegionName);
        return ZKUtil.getDataAndWatch(zkw, node);
    }

    public static byte[] getDataAndWatch(ZooKeeperWatcher zkw, String pathOrRegionName, Stat stat)
            throws KeeperException, IOException {
        String node = getPath(zkw, pathOrRegionName);
        return ZKUtil.getDataAndWatch(zkw, node, stat);
    }

    public static byte[] getDataNoWatch(ZooKeeperWatcher zkw, String pathOrRegionName, Stat stat)
            throws KeeperException, IOException {
        String node = getPath(zkw, pathOrRegionName);
        return ZKUtil.getDataNoWatch(zkw, node, stat);
    }

    /**
     * @param zkw
     * @param pathOrRegionName
     * @return Path to znode
     */
    public static String getPath(final ZooKeeperWatcher zkw, final String pathOrRegionName) {
        return pathOrRegionName.startsWith("/") ? pathOrRegionName : getNodeName(zkw, pathOrRegionName);
    }

}