| /** |
| * 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.hama.bsp.message; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.Map; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hama.Constants; |
| import org.apache.hama.bsp.BSPMessageBundle; |
| import org.apache.hama.bsp.BSPPeer; |
| import org.apache.hama.bsp.BSPPeerImpl; |
| import org.apache.hama.bsp.TaskAttemptID; |
| import org.apache.hama.bsp.message.compress.BSPCompressedBundle; |
| import org.apache.hama.ipc.HamaRPCProtocolVersion; |
| import org.apache.hama.ipc.RPC; |
| import org.apache.hama.ipc.RPC.Server; |
| import org.apache.hama.util.LRUCache; |
| |
| /** |
| * Implementation of the {@link HadoopMessageManager}. |
| * |
| */ |
| public final class HadoopMessageManagerImpl<M extends Writable> extends |
| CompressableMessageManager<M> implements HadoopMessageManager<M> { |
| |
| private static final Log LOG = LogFactory |
| .getLog(HadoopMessageManagerImpl.class); |
| |
| private Server server; |
| |
| private LRUCache<InetSocketAddress, HadoopMessageManager<M>> peersLRUCache = null; |
| |
| @SuppressWarnings("serial") |
| @Override |
| public final void init(TaskAttemptID attemptId, BSPPeer<?, ?, ?, ?, M> peer, |
| Configuration conf, InetSocketAddress peerAddress) { |
| super.init(attemptId, peer, conf, peerAddress); |
| super.initCompression(conf); |
| startRPCServer(conf, peerAddress); |
| peersLRUCache = new LRUCache<InetSocketAddress, HadoopMessageManager<M>>( |
| maxCachedConnections) { |
| @Override |
| protected final boolean removeEldestEntry( |
| Map.Entry<InetSocketAddress, HadoopMessageManager<M>> eldest) { |
| if (size() > this.capacity) { |
| HadoopMessageManager<M> proxy = eldest.getValue(); |
| RPC.stopProxy(proxy); |
| return true; |
| } |
| return false; |
| } |
| }; |
| } |
| |
| private final void startRPCServer(Configuration conf, |
| InetSocketAddress peerAddress) { |
| try { |
| String bindAddress = conf.get(Constants.PEER_HOST, |
| Constants.DEFAULT_PEER_HOST); |
| InetSocketAddress selfAddress = new InetSocketAddress(bindAddress, 0); |
| |
| this.server = RPC.getServer(this, selfAddress.getHostName(), |
| selfAddress.getPort(), conf); |
| server.start(); |
| |
| LOG.info(" BSPPeer address:" + server.getListenerAddress().getHostName() |
| + " port:" + server.getListenerAddress().getPort()); |
| } catch (IOException e) { |
| LOG.error("Fail to start RPC server!", e); |
| throw new RuntimeException("RPC Server could not be launched!"); |
| } |
| } |
| |
| @Override |
| public final void close() { |
| super.close(); |
| if (server != null) { |
| server.stop(); |
| } |
| } |
| |
| @Override |
| public final void transfer(InetSocketAddress addr, BSPMessageBundle<M> bundle) |
| throws IOException { |
| HadoopMessageManager<M> bspPeerConnection = this.getBSPPeerConnection(addr); |
| if (bspPeerConnection == null) { |
| throw new IllegalArgumentException("Can not find " + addr.toString() |
| + " to transfer messages to!"); |
| } else { |
| if (compressor != null |
| && (bundle.getApproximateSize() > conf.getLong( |
| "hama.messenger.compression.threshold", 1048576))) { |
| |
| BSPCompressedBundle compMsgBundle = compressor.compressBundle(bundle); |
| bspPeerConnection.put(compMsgBundle); |
| peer.incrementCounter(BSPPeerImpl.PeerCounter.COMPRESSED_MESSAGES, 1L); |
| } else { |
| bspPeerConnection.put(bundle); |
| } |
| } |
| } |
| |
| /** |
| * @param addr, socket address to which BSP Peer Connection will be |
| * established |
| * @return BSP Peer Connection, tried to return cached connection, else |
| * returns a new connection and caches it |
| * @throws IOException |
| */ |
| @SuppressWarnings("unchecked") |
| protected final HadoopMessageManager<M> getBSPPeerConnection( |
| InetSocketAddress addr) throws IOException { |
| HadoopMessageManager<M> bspPeerConnection; |
| if (!peersLRUCache.containsKey(addr)) { |
| bspPeerConnection = (HadoopMessageManager<M>) RPC.getProxy( |
| HadoopMessageManager.class, HamaRPCProtocolVersion.versionID, addr, |
| this.conf); |
| peersLRUCache.put(addr, bspPeerConnection); |
| } else { |
| bspPeerConnection = peersLRUCache.get(addr); |
| } |
| return bspPeerConnection; |
| } |
| |
| @Override |
| public final void put(M msg) throws IOException { |
| loopBackMessage(msg); |
| } |
| |
| @Override |
| public final void put(BSPMessageBundle<M> messages) throws IOException { |
| loopBackMessages(messages); |
| } |
| |
| @Override |
| public final void put(BSPCompressedBundle compMsgBundle) throws IOException { |
| BSPMessageBundle<M> bundle = compressor.decompressBundle(compMsgBundle); |
| loopBackMessages(bundle); |
| } |
| |
| @Override |
| public final long getProtocolVersion(String arg0, long arg1) |
| throws IOException { |
| return versionID; |
| } |
| |
| @Override |
| public InetSocketAddress getListenerAddress() { |
| if (this.server != null) { |
| return this.server.getListenerAddress(); |
| } |
| return null; |
| } |
| } |