storm-server/src/main/java/org/apache/storm/testing/InProcessZookeeper.java

/**
 * 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 org.apache.storm.testing;

import org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory;
import org.apache.storm.zookeeper.Zookeeper;

/**
 * A local Zookeeper instance available for testing.
 * ```java
 * try (InProcessZookeeper zk = new InProcessZookeeper) {
 *   // Run Tests...
 * }
 * ```
 */
public class InProcessZookeeper implements AutoCloseable {

    private final TmpPath zkTmp;
    private final NIOServerCnxnFactory zookeeper;

    public InProcessZookeeper() throws Exception {
        zkTmp = new TmpPath();
        zookeeper = Zookeeper.mkInprocessZookeeper(zkTmp.getPath(), null);
    }

    /**
     * Get port.
     * @return the port ZK is listening on (localhost)
     */
    public long getPort() {
        return zookeeper.getLocalPort();
    }

    @Override
    public void close() throws Exception {
        Zookeeper.shutdownInprocessZookeeper(zookeeper);
        zkTmp.close();
    }

}