org.apache.drill.exec.rpc.data.DataConnectionCreator.java Source code

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Here is the source code for org.apache.drill.exec.rpc.data.DataConnectionCreator.java

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/**
 * 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.data;

import java.io.Closeable;
import java.util.concurrent.ConcurrentMap;

import org.apache.drill.exec.exception.DrillbitStartupException;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
import org.apache.drill.exec.proto.ExecProtos.FragmentHandle;
import org.apache.drill.exec.rpc.control.WorkEventBus;
import org.apache.drill.exec.server.BootStrapContext;

import com.google.common.collect.Maps;
import com.google.common.io.Closeables;

/**
 * Manages a connection for each endpoint.
 */
public class DataConnectionCreator implements Closeable {
    static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DataConnectionCreator.class);

    private volatile DataServer server;
    private final BootStrapContext context;
    private final WorkEventBus workBus;
    private final DataResponseHandler dataHandler;
    private final boolean allowPortHunting;
    private ConcurrentMap<DrillbitEndpoint, DataConnectionManager> connectionManager = Maps.newConcurrentMap();

    public DataConnectionCreator(BootStrapContext context, WorkEventBus workBus, DataResponseHandler dataHandler,
            boolean allowPortHunting) {
        super();
        this.context = context;
        this.workBus = workBus;
        this.dataHandler = dataHandler;
        this.allowPortHunting = allowPortHunting;
    }

    public DrillbitEndpoint start(DrillbitEndpoint partialEndpoint) throws DrillbitStartupException {
        server = new DataServer(context, workBus, dataHandler);
        int port = server.bind(partialEndpoint.getControlPort() + 1, allowPortHunting);
        DrillbitEndpoint completeEndpoint = partialEndpoint.toBuilder().setDataPort(port).build();
        return completeEndpoint;
    }

    public DataTunnel getTunnel(DrillbitEndpoint endpoint) {
        DataConnectionManager newManager = new DataConnectionManager(endpoint, context);
        DataConnectionManager oldManager = connectionManager.putIfAbsent(endpoint, newManager);
        if (oldManager != null) {
            newManager = oldManager;
        }
        return new DataTunnel(newManager);
    }

    public void close() {
        Closeables.closeQuietly(server);
    }

}