| /** |
| * 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.distributedlog.service.announcer; |
| |
| import com.twitter.common.zookeeper.Group; |
| import com.twitter.common.zookeeper.ServerSet; |
| import org.apache.distributedlog.client.serverset.DLZkServerSet; |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.net.UnknownHostException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * ServerSet based announcer. |
| */ |
| public class ServerSetAnnouncer implements Announcer { |
| |
| private static final Logger logger = LoggerFactory.getLogger(ServerSetAnnouncer.class); |
| |
| final String localAddr; |
| final InetSocketAddress serviceEndpoint; |
| final Map<String, InetSocketAddress> additionalEndpoints; |
| final int shardId; |
| |
| // ServerSet |
| DLZkServerSet zkServerSet; |
| |
| // Service Status |
| ServerSet.EndpointStatus serviceStatus = null; |
| |
| /** |
| * Announce server infos. |
| * |
| * @param servicePort |
| * service port |
| * @param statsPort |
| * stats port |
| * @param shardId |
| * shard id |
| */ |
| public ServerSetAnnouncer(URI uri, |
| int servicePort, |
| int statsPort, |
| int shardId) throws UnknownHostException { |
| this.shardId = shardId; |
| this.localAddr = InetAddress.getLocalHost().getHostAddress(); |
| // service endpoint |
| this.serviceEndpoint = new InetSocketAddress(localAddr, servicePort); |
| // stats endpoint |
| InetSocketAddress statsEndpoint = new InetSocketAddress(localAddr, statsPort); |
| this.additionalEndpoints = new HashMap<String, InetSocketAddress>(); |
| this.additionalEndpoints.put("aurora", statsEndpoint); |
| this.additionalEndpoints.put("stats", statsEndpoint); |
| this.additionalEndpoints.put("service", serviceEndpoint); |
| this.additionalEndpoints.put("thrift", serviceEndpoint); |
| |
| // Create zookeeper and server set |
| this.zkServerSet = DLZkServerSet.of(uri, 60000); |
| } |
| |
| @Override |
| public synchronized void announce() throws IOException { |
| try { |
| serviceStatus = |
| zkServerSet.getServerSet().join(serviceEndpoint, additionalEndpoints, shardId); |
| } catch (Group.JoinException e) { |
| throw new IOException("Failed to announce service : ", e); |
| } catch (InterruptedException e) { |
| logger.warn("Interrupted on announcing service : ", e); |
| Thread.currentThread().interrupt(); |
| } |
| } |
| |
| @Override |
| public synchronized void unannounce() throws IOException { |
| if (null == serviceStatus) { |
| logger.warn("No service to unannounce."); |
| return; |
| } |
| try { |
| serviceStatus.leave(); |
| } catch (ServerSet.UpdateException e) { |
| throw new IOException("Failed to unannounce service : ", e); |
| } |
| } |
| |
| @Override |
| public void close() { |
| zkServerSet.close(); |
| } |
| } |