com.facebook.zookeeper.mock.MockZkConnectionManager.java Source code

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Here is the source code for com.facebook.zookeeper.mock.MockZkConnectionManager.java

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/*
 * Copyright (C) 2012 Facebook, Inc.
 *
 * 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.facebook.zookeeper.mock;

import com.facebook.zookeeper.ZooKeeperFactory;
import com.facebook.zookeeper.ZooKeeperIface;
import com.facebook.zookeeper.connection.ZkConnectionManager;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;

import java.util.ArrayList;
import java.util.List;

public class MockZkConnectionManager implements ZkConnectionManager {
    private final ZooKeeperFactory zooKeeperFactory;
    private ZooKeeperIface zk;
    private final List<Watcher> watchers = new ArrayList<Watcher>();
    private boolean isShutdown = false;

    public MockZkConnectionManager(ZooKeeperFactory zooKeeperFactory) {
        this.zooKeeperFactory = zooKeeperFactory;
        refreshClient();
    }

    public void refreshClient() {
        try {
            if (zk != null) {
                zk.close();
            }
            zk = zooKeeperFactory.create(new Watcher() {
                @Override
                public void process(WatchedEvent event) {
                    for (Watcher watcher : watchers) {
                        watcher.process(event);
                    }
                }
            });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public ZooKeeperIface getClient() throws InterruptedException {
        if (isShutdown) {
            throw new IllegalStateException("Already shutdown");
        }
        return zk;
    }

    @Override
    public ZooKeeper.States registerWatcher(Watcher watcher) {
        watchers.add(watcher);
        return zk.getState();
    }

    @Override
    public void shutdown() throws InterruptedException {
        if (isShutdown) {
            throw new IllegalStateException("Multiple shutdowns");
        }
        isShutdown = true;
    }
}