| /** |
| * 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 com.twitter.distributedlog.client.serverset; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.net.HostAndPort; |
| import com.twitter.common.quantity.Amount; |
| import com.twitter.common.quantity.Time; |
| import com.twitter.common.zookeeper.ServerSet; |
| import com.twitter.common.zookeeper.ServerSets; |
| import com.twitter.common.zookeeper.ZooKeeperClient; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.zookeeper.ZooDefs; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A wrapper over zookeeper client and its server set. |
| */ |
| public class DLZkServerSet { |
| |
| private static final Logger logger = LoggerFactory.getLogger(DLZkServerSet.class); |
| |
| static final String ZNODE_WRITE_PROXY = ".write_proxy"; |
| |
| private static String getZKServersFromDLUri(URI uri) { |
| return uri.getAuthority().replace(";", ","); |
| } |
| |
| private static Iterable<InetSocketAddress> getZkAddresses(URI uri) { |
| String zkServers = getZKServersFromDLUri(uri); |
| String[] zkServerList = StringUtils.split(zkServers, ','); |
| ImmutableList.Builder<InetSocketAddress> builder = ImmutableList.builder(); |
| for (String zkServer : zkServerList) { |
| HostAndPort hostAndPort = HostAndPort.fromString(zkServer).withDefaultPort(2181); |
| builder.add(InetSocketAddress.createUnresolved( |
| hostAndPort.getHostText(), |
| hostAndPort.getPort())); |
| } |
| return builder.build(); |
| } |
| |
| public static DLZkServerSet of(URI uri, |
| int zkSessionTimeoutMs) { |
| // Create zookeeper and server set |
| String zkPath = uri.getPath() + "/" + ZNODE_WRITE_PROXY; |
| Iterable<InetSocketAddress> zkAddresses = getZkAddresses(uri); |
| ZooKeeperClient zkClient = |
| new ZooKeeperClient(Amount.of(zkSessionTimeoutMs, Time.MILLISECONDS), zkAddresses); |
| ServerSet serverSet = ServerSets.create(zkClient, ZooDefs.Ids.OPEN_ACL_UNSAFE, zkPath); |
| return new DLZkServerSet(zkClient, serverSet); |
| } |
| |
| private final ZooKeeperClient zkClient; |
| private final ServerSet zkServerSet; |
| |
| public DLZkServerSet(ZooKeeperClient zkClient, |
| ServerSet zkServerSet) { |
| this.zkClient = zkClient; |
| this.zkServerSet = zkServerSet; |
| } |
| |
| public ZooKeeperClient getZkClient() { |
| return zkClient; |
| } |
| |
| public ServerSet getServerSet() { |
| return zkServerSet; |
| } |
| |
| public void close() { |
| zkClient.close(); |
| } |
| } |