org.apache.bookkeeper.meta.zk.ZKMetadataClientDriver Maven / Gradle / Ivy

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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 org.apache.bookkeeper.meta.zk;

import java.util.Optional;
import java.util.concurrent.ScheduledExecutorService;
import lombok.extern.slf4j.Slf4j;
import org.apache.bookkeeper.conf.ClientConfiguration;
import org.apache.bookkeeper.discover.RegistrationClient;
import org.apache.bookkeeper.discover.ZKRegistrationClient;
import org.apache.bookkeeper.meta.MetadataClientDriver;
import org.apache.bookkeeper.meta.MetadataDrivers;
import org.apache.bookkeeper.meta.exceptions.MetadataException;
import org.apache.bookkeeper.stats.StatsLogger;
import org.apache.bookkeeper.zookeeper.BoundExponentialBackoffRetryPolicy;
import org.apache.zookeeper.Watcher.Event.EventType;
import org.apache.zookeeper.Watcher.Event.KeeperState;

/**
 * ZooKeeper based metadata client driver.
 */
@Slf4j
public class ZKMetadataClientDriver
    extends ZKMetadataDriverBase
    implements MetadataClientDriver {

    // register myself to driver manager
    static {
        MetadataDrivers.registerClientDriver(
            SCHEME, ZKMetadataClientDriver.class);
    }

    ClientConfiguration clientConf;
    ScheduledExecutorService scheduler;
    RegistrationClient regClient;
    boolean bookieAddressTracking = true;

    @Override
    public synchronized MetadataClientDriver initialize(ClientConfiguration conf,
                                                        ScheduledExecutorService scheduler,
                                                        StatsLogger statsLogger,

                                                        Optional