| /* |
| * 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.naming.NameAssignment; |
| import org.apache.reef.io.network.naming.serialization.*; |
| import org.apache.reef.tang.Injector; |
| import org.apache.reef.tang.Tang; |
| import org.apache.reef.tang.annotations.Parameter; |
| import org.apache.reef.tang.exceptions.InjectionException; |
| import org.apache.reef.wake.EventHandler; |
| import org.apache.reef.wake.Identifier; |
| import org.apache.reef.wake.IdentifierFactory; |
| import org.apache.reef.wake.impl.MultiEventHandler; |
| import org.apache.reef.wake.impl.SyncStage; |
| import org.apache.reef.wake.remote.Codec; |
| import org.apache.reef.wake.remote.RemoteConfiguration; |
| import org.apache.reef.wake.remote.address.LocalAddressProvider; |
| import org.apache.reef.wake.remote.impl.TransportEvent; |
| import org.apache.reef.wake.remote.ports.TcpPortProvider; |
| import org.apache.reef.wake.remote.transport.Transport; |
| import org.apache.reef.wake.remote.transport.netty.NettyMessagingTransport; |
| import org.apache.reef.webserver.ReefEventStateManager; |
| |
| import javax.inject.Inject; |
| import java.net.InetSocketAddress; |
| import java.util.*; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Naming server implementation. |
| */ |
| public final class NameServerImpl implements NameServer { |
| |
| private static final String UNKNOWN_HOST_NAME = "##UNKNOWN##"; |
| private static final Logger LOG = Logger.getLogger(NameServer.class.getName()); |
| |
| private final Transport transport; |
| private final Map<Identifier, InetSocketAddress> idToAddrMap; |
| private final ReefEventStateManager reefEventStateManager; |
| private final int port; |
| private final LocalAddressProvider localAddressProvider; |
| |
| /** |
| * @param port a listening port number |
| * @param factory an identifier factory |
| * @param localAddressProvider a local address provider |
| * Constructs a name server |
| */ |
| @Inject |
| private NameServerImpl( |
| @Parameter(RemoteConfiguration.HostAddress.class) final String hostAddress, |
| @Parameter(NameServerParameters.NameServerPort.class) final int port, |
| @Parameter(NameServerParameters.NameServerIdentifierFactory.class) final IdentifierFactory factory, |
| final TcpPortProvider portProvider, |
| final LocalAddressProvider localAddressProvider) { |
| |
| final Injector injector = Tang.Factory.getTang().newInjector(); |
| |
| this.localAddressProvider = localAddressProvider; |
| this.reefEventStateManager = null; |
| final Codec<NamingMessage> codec = NamingCodecFactory.createFullCodec(factory); |
| final EventHandler<NamingMessage> handler = createEventHandler(codec); |
| |
| String host = UNKNOWN_HOST_NAME.equals(hostAddress) ? localAddressProvider.getLocalAddress() : hostAddress; |
| injector.bindVolatileParameter(RemoteConfiguration.HostAddress.class, host); |
| injector.bindVolatileParameter(RemoteConfiguration.Port.class, port); |
| injector.bindVolatileInstance(TcpPortProvider.class, portProvider); |
| injector.bindVolatileParameter(RemoteConfiguration.RemoteServerStage.class, |
| new SyncStage<>(new NamingServerHandler(handler, codec))); |
| |
| try { |
| this.transport = injector.getInstance(NettyMessagingTransport.class); |
| } catch (final InjectionException e) { |
| throw new RuntimeException(e); |
| } |
| |
| this.port = transport.getListeningPort(); |
| this.idToAddrMap = Collections.synchronizedMap(new HashMap<Identifier, InetSocketAddress>()); |
| |
| LOG.log(Level.FINE, "NameServer starting, listening at port {0}", this.port); |
| } |
| |
| private EventHandler<NamingMessage> createEventHandler(final Codec<NamingMessage> codec) { |
| |
| final Map<Class<? extends NamingMessage>, EventHandler<? extends NamingMessage>> |
| clazzToHandlerMap = new HashMap<>(); |
| |
| clazzToHandlerMap.put(NamingLookupRequest.class, new NamingLookupRequestHandler(this, codec)); |
| clazzToHandlerMap.put(NamingRegisterRequest.class, new NamingRegisterRequestHandler(this, codec)); |
| clazzToHandlerMap.put(NamingUnregisterRequest.class, new NamingUnregisterRequestHandler(this)); |
| final EventHandler<NamingMessage> handler = new MultiEventHandler<>(clazzToHandlerMap); |
| |
| return handler; |
| } |
| /** |
| * Gets port. |
| */ |
| @Override |
| public int getPort() { |
| return port; |
| } |
| |
| /** |
| * Closes resources. |
| */ |
| @Override |
| public void close() throws Exception { |
| transport.close(); |
| } |
| |
| /** |
| * Registers an (identifier, address) mapping locally. |
| * |
| * @param id an identifier |
| * @param addr an Internet socket address |
| */ |
| @Override |
| public void register(final Identifier id, final InetSocketAddress addr) { |
| LOG.log(Level.FINE, "id: " + id + " addr: " + addr); |
| idToAddrMap.put(id, addr); |
| } |
| |
| /** |
| * Unregisters an identifier locally. |
| * |
| * @param id an identifier |
| */ |
| @Override |
| public void unregister(final Identifier id) { |
| LOG.log(Level.FINE, "id: " + id); |
| idToAddrMap.remove(id); |
| } |
| |
| /** |
| * Finds an address for an identifier locally. |
| * |
| * @param id an identifier |
| * @return an Internet socket address |
| */ |
| @Override |
| public InetSocketAddress lookup(final Identifier id) { |
| LOG.log(Level.FINE, "id: {0}", id); |
| return idToAddrMap.get(id); |
| } |
| |
| /** |
| * Finds addresses for identifiers locally. |
| * |
| * @param identifiers an iterable of identifiers |
| * @return a list of name assignments |
| */ |
| @Override |
| public List<NameAssignment> lookup(final Iterable<Identifier> identifiers) { |
| LOG.log(Level.FINE, "identifiers"); |
| final List<NameAssignment> nas = new ArrayList<>(); |
| for (final Identifier id : identifiers) { |
| final InetSocketAddress addr = idToAddrMap.get(id); |
| LOG.log(Level.FINEST, "id : {0} addr: {1}", new Object[]{id, addr}); |
| if (addr != null) { |
| nas.add(new NameAssignmentTuple(id, addr)); |
| } |
| } |
| return nas; |
| } |
| |
| private String getNameServerId() { |
| return this.localAddressProvider.getLocalAddress() + ":" + getPort(); |
| } |
| } |
| |
| /** |
| * Naming server transport event handler that invokes a specific naming message handler. |
| */ |
| class NamingServerHandler implements EventHandler<TransportEvent> { |
| |
| private final Codec<NamingMessage> codec; |
| private final EventHandler<NamingMessage> handler; |
| |
| NamingServerHandler(final EventHandler<NamingMessage> handler, final Codec<NamingMessage> codec) { |
| this.codec = codec; |
| this.handler = handler; |
| } |
| |
| @Override |
| public void onNext(final TransportEvent value) { |
| final byte[] data = value.getData(); |
| final NamingMessage message = codec.decode(data); |
| message.setLink(value.getLink()); |
| handler.onNext(message); |
| } |
| } |
| |
| /** |
| * Naming lookup request handler. |
| */ |
| class NamingLookupRequestHandler implements EventHandler<NamingLookupRequest> { |
| |
| private static final Logger LOG = Logger.getLogger(NamingLookupRequestHandler.class.getName()); |
| |
| |
| private final NameServer server; |
| private final Codec<NamingMessage> codec; |
| |
| NamingLookupRequestHandler(final NameServer server, final Codec<NamingMessage> codec) { |
| this.server = server; |
| this.codec = codec; |
| } |
| |
| @Override |
| public void onNext(final NamingLookupRequest value) { |
| final List<NameAssignment> nas = server.lookup(value.getIdentifiers()); |
| final byte[] resp = codec.encode(new NamingLookupResponse(nas)); |
| value.getLink().write(resp); |
| } |
| } |
| |
| /** |
| * Naming register request handler. |
| */ |
| class NamingRegisterRequestHandler implements EventHandler<NamingRegisterRequest> { |
| |
| private static final Logger LOG = Logger.getLogger(NamingRegisterRequestHandler.class.getName()); |
| |
| |
| private final NameServer server; |
| private final Codec<NamingMessage> codec; |
| |
| NamingRegisterRequestHandler(final NameServer server, final Codec<NamingMessage> codec) { |
| this.server = server; |
| this.codec = codec; |
| } |
| |
| @Override |
| public void onNext(final NamingRegisterRequest value) { |
| server.register(value.getNameAssignment().getIdentifier(), value.getNameAssignment().getAddress()); |
| final byte[] resp = codec.encode(new NamingRegisterResponse(value)); |
| value.getLink().write(resp); |
| } |
| } |
| |
| /** |
| * Naming unregister request handler. |
| */ |
| class NamingUnregisterRequestHandler implements EventHandler<NamingUnregisterRequest> { |
| |
| private final NameServer server; |
| |
| NamingUnregisterRequestHandler(final NameServer server) { |
| this.server = server; |
| } |
| |
| @Override |
| public void onNext(final NamingUnregisterRequest value) { |
| server.unregister(value.getIdentifier()); |
| } |
| } |