BookKeeperClientFactoryImpl.java

/**
 * Copyright 2016 Yahoo 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.yahoo.pulsar.broker;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

import org.apache.bookkeeper.client.BookKeeper;
import org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicy;
import org.apache.bookkeeper.conf.ClientConfiguration;
import org.apache.bookkeeper.meta.HierarchicalLedgerManagerFactory;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooKeeper;

import com.yahoo.pulsar.zookeeper.ZkBookieRackAffinityMapping;
import com.yahoo.pulsar.zookeeper.ZkIsolatedBookieEnsemblePlacementPolicy;
import com.yahoo.pulsar.zookeeper.ZooKeeperCache;

public class BookKeeperClientFactoryImpl implements BookKeeperClientFactory {

    private ZooKeeperCache rackawarePolicyZkCache;
    private ZooKeeperCache clientIsolationZkCache;
    
    @Override
    public BookKeeper create(ServiceConfiguration conf, ZooKeeper zkClient) throws IOException {
        ClientConfiguration bkConf = new ClientConfiguration();

        if (conf.getBookkeeperClientAuthenticationPlugin() != null
                && conf.getBookkeeperClientAuthenticationPlugin().trim().length() > 0) {
            bkConf.setClientAuthProviderFactoryClass(conf.getBookkeeperClientAuthenticationPlugin());
            bkConf.setProperty(conf.getBookkeeperClientAuthenticationParametersName(),
                    conf.getBookkeeperClientAuthenticationParameters());
        }

        bkConf.setThrottleValue(0);
        bkConf.setAddEntryTimeout((int) conf.getBookkeeperClientTimeoutInSeconds());
        bkConf.setReadEntryTimeout((int) conf.getBookkeeperClientTimeoutInSeconds());
        bkConf.setSpeculativeReadTimeout(conf.getBookkeeperClientSpeculativeReadTimeoutInMillis());
        bkConf.setNumChannelsPerBookie(16);
        bkConf.setUseV2WireProtocol(true);
        bkConf.setLedgerManagerFactoryClassName(HierarchicalLedgerManagerFactory.class.getName());
        if (conf.isBookkeeperClientHealthCheckEnabled()) {
            bkConf.enableBookieHealthCheck();
            bkConf.setBookieHealthCheckInterval(conf.getBookkeeperHealthCheckIntervalSec(), TimeUnit.SECONDS);
            bkConf.setBookieErrorThresholdPerInterval(conf.getBookkeeperClientHealthCheckErrorThresholdPerInterval());
            bkConf.setBookieQuarantineTime((int) conf.getBookkeeperClientHealthCheckQuarantineTimeInSeconds(),
                    TimeUnit.SECONDS);
        }

        if (conf.isBookkeeperClientRackawarePolicyEnabled()) {
            bkConf.setEnsemblePlacementPolicy(RackawareEnsemblePlacementPolicy.class);
            bkConf.setProperty(RackawareEnsemblePlacementPolicy.REPP_DNS_RESOLVER_CLASS,
                    ZkBookieRackAffinityMapping.class.getName());
            this.rackawarePolicyZkCache = new ZooKeeperCache(zkClient) {
            };
            bkConf.setProperty(ZooKeeperCache.ZK_CACHE_INSTANCE, this.rackawarePolicyZkCache);
        }

        if (conf.getBookkeeperClientIsolationGroups() != null && !conf.getBookkeeperClientIsolationGroups().isEmpty()) {
            bkConf.setEnsemblePlacementPolicy(ZkIsolatedBookieEnsemblePlacementPolicy.class);
            bkConf.setProperty(ZkIsolatedBookieEnsemblePlacementPolicy.ISOLATION_BOOKIE_GROUPS,
                    conf.getBookkeeperClientIsolationGroups());
            if (bkConf.getProperty(ZooKeeperCache.ZK_CACHE_INSTANCE) == null) {
                this.clientIsolationZkCache = new ZooKeeperCache(zkClient) {
                };
                bkConf.setProperty(ZooKeeperCache.ZK_CACHE_INSTANCE, this.clientIsolationZkCache);
            }
        }

        try {
            return new BookKeeper(bkConf, zkClient);
        } catch (InterruptedException | KeeperException e) {
            throw new IOException(e);
        }
    }
    
    public void close() {
        if (this.rackawarePolicyZkCache != null) {
            this.rackawarePolicyZkCache.stop();
        }
        if (this.clientIsolationZkCache != null) {
            this.clientIsolationZkCache.stop();
        }
    }
}