/**
* 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 InterruptedException, 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, FragmentHandle handle) {
DataConnectionManager newManager = new DataConnectionManager(handle, endpoint, context);
DataConnectionManager oldManager = connectionManager.putIfAbsent(endpoint, newManager);
if(oldManager != null){
newManager = oldManager;
}
return new DataTunnel(newManager);
}
public void close() {
Closeables.closeQuietly(server);
}
}