| /* |
| * 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.reef.io.network.naming; |
| |
| import org.apache.reef.io.network.naming.exception.NamingRuntimeException; |
| import org.apache.reef.io.network.naming.parameters.*; |
| import org.apache.reef.io.network.naming.serialization.NamingLookupResponse; |
| import org.apache.reef.io.network.naming.serialization.NamingMessage; |
| import org.apache.reef.io.network.naming.serialization.NamingRegisterResponse; |
| import org.apache.reef.tang.annotations.Parameter; |
| import org.apache.reef.wake.EventHandler; |
| import org.apache.reef.wake.Identifier; |
| import org.apache.reef.wake.IdentifierFactory; |
| import org.apache.reef.wake.impl.SyncStage; |
| import org.apache.reef.wake.remote.Codec; |
| import org.apache.reef.wake.remote.address.LocalAddressProvider; |
| import org.apache.reef.wake.remote.impl.TransportEvent; |
| import org.apache.reef.wake.remote.transport.Transport; |
| import org.apache.reef.wake.remote.transport.TransportFactory; |
| |
| import javax.inject.Inject; |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Naming client looking up remote server. |
| */ |
| public final class NameClient implements NameResolver { |
| private static final Logger LOG = Logger.getLogger(NameClient.class.getName()); |
| |
| private NameLookupClient lookupClient; |
| private NameRegistryClient registryClient; |
| private Transport transport; |
| |
| /** |
| * Constructs a naming client. |
| * |
| * @param serverAddr a server address |
| * @param serverPort a server port number |
| * @param timeout timeout in ms |
| * @param factory an identifier factory |
| * @param retryCount the number of retries |
| * @param retryTimeout retry timeout |
| * @param localAddressProvider a local address provider |
| * @param tpFactory transport factory |
| */ |
| @Inject |
| @SuppressWarnings("deprecation") |
| private NameClient( |
| @Parameter(NameResolverNameServerAddr.class) final String serverAddr, |
| @Parameter(NameResolverNameServerPort.class) final int serverPort, |
| @Parameter(NameResolverCacheTimeout.class) final long timeout, |
| @Parameter(NameResolverIdentifierFactory.class) final IdentifierFactory factory, |
| @Parameter(NameResolverRetryCount.class) final int retryCount, |
| @Parameter(NameResolverRetryTimeout.class) final int retryTimeout, |
| final LocalAddressProvider localAddressProvider, |
| final TransportFactory tpFactory) { |
| |
| final BlockingQueue<NamingLookupResponse> replyLookupQueue = new LinkedBlockingQueue<>(); |
| final BlockingQueue<NamingRegisterResponse> replyRegisterQueue = new LinkedBlockingQueue<>(); |
| final Codec<NamingMessage> codec = NamingCodecFactory.createFullCodec(factory); |
| |
| this.transport = tpFactory.newInstance(localAddressProvider.getLocalAddress(), 0, |
| new SyncStage<>(new NamingClientEventHandler( |
| new NamingResponseHandler(replyLookupQueue, replyRegisterQueue), codec)), |
| null, retryCount, retryTimeout); |
| |
| this.lookupClient = new NameLookupClient(serverAddr, serverPort, timeout, factory, |
| retryCount, retryTimeout, replyLookupQueue, this.transport); |
| |
| this.registryClient = new NameRegistryClient(serverAddr, serverPort, timeout, |
| factory, replyRegisterQueue, this.transport); |
| } |
| |
| /** |
| * Registers an (identifier, address) mapping. |
| * |
| * @param id an identifier |
| * @param addr an Internet socket address |
| */ |
| @Override |
| public void register(final Identifier id, final InetSocketAddress addr) |
| throws Exception { |
| LOG.log(Level.FINE, "Register {0} : {1}", new Object[]{id, addr}); |
| this.registryClient.register(id, addr); |
| } |
| |
| /** |
| * Unregisters an identifier. |
| * |
| * @param id an identifier |
| */ |
| @Override |
| public void unregister(final Identifier id) throws IOException { |
| this.registryClient.unregister(id); |
| } |
| |
| /** |
| * Finds an address for an identifier. |
| * |
| * @param id an identifier |
| * @return an Internet socket address |
| */ |
| @Override |
| public InetSocketAddress lookup(final Identifier id) throws Exception { |
| return this.lookupClient.lookup(id); |
| } |
| |
| /** |
| * Retrieves an address for an identifier remotely. |
| * |
| * @param id an identifier |
| * @return an Internet socket address |
| * @throws Exception |
| */ |
| public InetSocketAddress remoteLookup(final Identifier id) throws Exception { |
| return this.lookupClient.remoteLookup(id); |
| } |
| |
| /** |
| * Closes resources. |
| */ |
| @Override |
| public void close() throws Exception { |
| |
| if (this.lookupClient != null) { |
| this.lookupClient.close(); |
| } |
| |
| if (this.registryClient != null) { |
| this.registryClient.close(); |
| } |
| |
| if (this.transport != null) { |
| this.transport.close(); |
| } |
| } |
| } |
| |
| /** |
| * Naming client transport event handler. |
| */ |
| class NamingClientEventHandler implements EventHandler<TransportEvent> { |
| |
| private static final Logger LOG = Logger.getLogger(NamingClientEventHandler.class.getName()); |
| |
| private final EventHandler<NamingMessage> handler; |
| private final Codec<NamingMessage> codec; |
| |
| NamingClientEventHandler( |
| final EventHandler<NamingMessage> handler, final Codec<NamingMessage> codec) { |
| this.handler = handler; |
| this.codec = codec; |
| } |
| |
| @Override |
| public void onNext(final TransportEvent value) { |
| LOG.log(Level.FINE, "Transport: ", value); |
| this.handler.onNext(this.codec.decode(value.getData())); |
| } |
| } |
| |
| /** |
| * Naming response message handler. |
| */ |
| class NamingResponseHandler implements EventHandler<NamingMessage> { |
| private static final Logger LOG = Logger.getLogger(NamingResponseHandler.class.getName()); |
| |
| private final BlockingQueue<NamingLookupResponse> replyLookupQueue; |
| private final BlockingQueue<NamingRegisterResponse> replyRegisterQueue; |
| |
| NamingResponseHandler(final BlockingQueue<NamingLookupResponse> replyLookupQueue, |
| final BlockingQueue<NamingRegisterResponse> replyRegisterQueue) { |
| this.replyLookupQueue = replyLookupQueue; |
| this.replyRegisterQueue = replyRegisterQueue; |
| } |
| |
| @Override |
| public void onNext(final NamingMessage value) { |
| if (value instanceof NamingLookupResponse) { |
| if (!replyLookupQueue.offer((NamingLookupResponse) value)) { |
| LOG.log(Level.FINEST, "Element {0} was not added to the queue", value); |
| } |
| } else if (value instanceof NamingRegisterResponse) { |
| if (!replyRegisterQueue.offer((NamingRegisterResponse) value)) { |
| LOG.log(Level.FINEST, "Element {0} was not added to the queue", value); |
| } |
| } else { |
| throw new NamingRuntimeException("Unknown naming response message"); |
| } |
| |
| } |
| |
| } |