curator-master/curator-test/src/main/java/org/apache/curator/test/TestingQuorumPeerMain.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.curator.test;

import java.lang.reflect.Field;
import java.nio.channels.ServerSocketChannel;
import org.apache.zookeeper.server.ServerCnxnFactory;
import org.apache.zookeeper.server.quorum.QuorumPeer;
import org.apache.zookeeper.server.quorum.QuorumPeerMain;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

class TestingQuorumPeerMain extends QuorumPeerMain implements ZooKeeperMainFace {
    private static final Logger log = LoggerFactory.getLogger(TestingQuorumPeerMain.class);
    private volatile boolean isClosed = false;

    @Override
    public void kill() {
        try {
            if (quorumPeer != null) {
                Field cnxnFactoryField = QuorumPeer.class.getDeclaredField("cnxnFactory");
                cnxnFactoryField.setAccessible(true);
                ServerCnxnFactory cnxnFactory = (ServerCnxnFactory) cnxnFactoryField.get(quorumPeer);
                Compatibility.serverCnxnFactoryCloseAll(cnxnFactory);

                Field ssField = cnxnFactory.getClass().getDeclaredField("ss");
                ssField.setAccessible(true);
                ServerSocketChannel ss = (ServerSocketChannel) ssField.get(cnxnFactory);
                ss.close();
            }
            close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void close() {
        if ((quorumPeer != null) && !isClosed) {
            isClosed = true;
            quorumPeer.shutdown();
        }
    }

    private void blockUntilStarted() {
        long startTime = System.currentTimeMillis();
        while ((quorumPeer == null) && ((System.currentTimeMillis() - startTime) <= TestingZooKeeperMain.MAX_WAIT_MS)) {
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
                break;
            }
        }
        if (quorumPeer == null) {
            throw new FailedServerStartException("quorumPeer never got set");
        }
    }

    @Override
    public void start(QuorumPeerConfigBuilder configBuilder) {
        new Thread(() -> {
                    try {
                        runFromConfig(configBuilder.buildConfig());
                    } catch (Exception e) {
                        log.error(
                                "From testing server (random state: {}) for instance: {}",
                                configBuilder.isFromRandom(),
                                configBuilder.getInstanceSpec(),
                                e);
                    }
                })
                .start();

        blockUntilStarted();
    }

    @Override
    public int getClientPort() {
        return quorumPeer == null ? -1 : quorumPeer.getClientPort();
    }
}
