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

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Here is the source code for org.apache.hadoop.thriftfs.ThriftServerContext.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.OutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.Random;
import java.util.StringTokenizer;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.util.LineReader;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TSocket;

/**
 * Represents the context of a Thrift service
 */
public class ThriftServerContext {
    private final TTransport transport;
    private final String clientName;

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

    private static Random random = new Random();

    public ThriftServerContext(TTransport transport) {
        this.transport = transport;
        this.clientName = assignClientName();
    }

    /**
     * Tries to get the client name for a given Thrift transport.
     * 
     * @param t the Thrift transport
     * @return The client name, if 'transport' was a socket, or
     *         "unknown-client:<random number>" otherwise.
     */
    private String assignClientName() {
        Socket sock = getTransportSocket();
        if (sock != null) {
            return sock.getInetAddress().getHostAddress() + ":" + sock.getPort();
        }
        return "unknown-client:" + random.nextLong();
    }

    public String getClientName() {
        return this.clientName;
    }

    /**
     * Tries to get the Socket out of a Thrift transport.
     *
     * @param t the Thrift transport
     * @return the socket, or null if the transport was non-socket type.
     */
    private Socket getTransportSocket() {
        if (TSocket.class.isAssignableFrom(transport.getClass())) {
            return ((TSocket) transport).getSocket();
        }
        return null;
    }
}