Java tutorial
/** * 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.drill.exec.rpc.bit; import java.util.concurrent.ConcurrentMap; import org.apache.drill.exec.ExecConstants; import org.apache.drill.exec.exception.DrillbitStartupException; import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint; import org.apache.drill.exec.server.BootStrapContext; import org.apache.drill.exec.work.batch.BitComHandler; import org.apache.drill.exec.work.fragment.IncomingFragmentHandler; import com.google.common.collect.Maps; import com.google.common.io.Closeables; /** * Manages communication tunnels between nodes. */ public class BitComImpl implements BitCom { static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(BitComImpl.class); private final ListenerPool listeners; private volatile BitServer server; private final BitComHandler handler; private final BootStrapContext context; private final ConnectionManagerRegistry connectionRegistry; public BitComImpl(BootStrapContext context, BitComHandler handler) { super(); this.handler = handler; this.context = context; this.listeners = new ListenerPool(8); this.connectionRegistry = new ConnectionManagerRegistry(handler, context, listeners); } @Override public DrillbitEndpoint start(DrillbitEndpoint partialEndpoint) throws InterruptedException, DrillbitStartupException { server = new BitServer(handler, context, connectionRegistry, listeners); int port = context.getConfig().getInt(ExecConstants.INITIAL_BIT_PORT); port = server.bind(port); DrillbitEndpoint completeEndpoint = partialEndpoint.toBuilder().setBitPort(port).build(); connectionRegistry.setEndpoint(completeEndpoint); return completeEndpoint; } public ListenerPool getListeners() { return listeners; } @Override public BitTunnel getTunnel(DrillbitEndpoint endpoint) { return new BitTunnel(endpoint, connectionRegistry.getConnectionManager(endpoint)); } @Override public void registerIncomingBatchHandler(IncomingFragmentHandler handler) { this.handler.registerIncomingFragmentHandler(handler); } public void close() { Closeables.closeQuietly(server); for (BitConnectionManager bt : connectionRegistry) { bt.close(); } } }