org.apache.hadoop.thriftfs.ThriftPluginServer.java Source code

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Here is the source code for org.apache.hadoop.thriftfs.ThriftPluginServer.java

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/**
 * Licensed to Cloudera, Inc. under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Cloudera, Inc. 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.hadoop.thriftfs;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.concurrent.TimeUnit;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import org.apache.thrift.TProcessorFactory;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.transport.TServerSocket;
import org.apache.thrift.transport.TServerTransport;
import org.apache.thrift.transport.TTransportFactory;

/**
 * Thrift HDFS plug-in base class.
 */
public class ThriftPluginServer implements Configurable, Runnable {

    protected Configuration conf;
    private SanerThreadPoolServer server;

    protected int port;

    private InetSocketAddress address;

    private TProcessorFactory processorFactory;

    static final Log LOG = LogFactory.getLog(ThriftPluginServer.class);

    static final int SOCKET_READ_TIMEOUT = 2000; // 2sec

    static {
        Configuration.addDefaultResource("thriftfs-default.xml");
        Configuration.addDefaultResource("thriftfs-site.xml");
    }

    public ThriftPluginServer(InetSocketAddress address, TProcessorFactory processorFactory) {
        //options = new TThreadPoolServer.Options();
        port = address.getPort();
        this.address = address;
        this.processorFactory = processorFactory;
    }

    /**
     * Start processing requests.
     * 
     * @throws IllegalStateException if the server has already been started.
     * @throws IOException on network errors.
     */
    public void start() throws IOException {
        String hostname = address.getAddress().getHostAddress();

        synchronized (this) {
            if (server != null) {
                throw new IllegalStateException("Thrift server already started");
            }
            LOG.info("Starting Thrift server");
            ServerSocket sock = new ServerSocket();
            sock.setReuseAddress(true);
            if (port == 0) {
                sock.bind(null);
                address = new InetSocketAddress(hostname, sock.getLocalPort());
                port = address.getPort();
            } else {
                sock.bind(address);
            }
            TServerTransport transport = new TServerSocket(sock, SOCKET_READ_TIMEOUT);
            SanerThreadPoolServer.Options options = new SanerThreadPoolServer.Options();
            options.minWorkerThreads = conf.getInt("dfs.thrift.threads.min", 5);
            options.maxWorkerThreads = conf.getInt("dfs.thrift.threads.max", 20);
            options.stopTimeoutVal = conf.getInt("dfs.thrift.timeout", 60);
            options.stopTimeoutUnit = TimeUnit.SECONDS;
            options.queueSize = conf.getInt("dfs.thrift.queue.size", 4 * options.maxWorkerThreads);

            server = new SanerThreadPoolServer(processorFactory, transport, new TTransportFactory(),
                    new TTransportFactory(), new TBinaryProtocol.Factory(), new TBinaryProtocol.Factory(), options);
        }

        Thread t = new Thread(this);
        t.start();
        LOG.info("Thrift server listening on " + hostname + ":" + port);
    }

    /** Stop processing requests. */
    public void stop() {
        synchronized (this) {
            if (server != null) {
                LOG.info("Stopping Thrift server");
                server.stop();
                LOG.info("Thrift stopped");
                server = null;
                port = -1;
            }
        }
    }

    public void close() {
        stop();
    }

    public void run() {
        server.serve();
    }

    public Configuration getConf() {
        return conf;
    }

    public void setConf(Configuration conf) {
        this.conf = conf;
    }

    public int getPort() {
        return port;
    }
}