it.crs4.pydoop.mapreduce.pipes.CommonStub.java Source code

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Here is the source code for it.crs4.pydoop.mapreduce.pipes.CommonStub.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 it.crs4.pydoop.mapreduce.pipes;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

import javax.crypto.SecretKey;

import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableUtils;
import org.apache.hadoop.mapreduce.security.SecureShuffleUtils;
import org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager;

public class CommonStub {

    protected Socket socket = null;
    protected DataInputStream dataInput;
    protected DataOutputStream dataOut;

    protected String createDigest(byte[] password, String data) throws IOException {
        SecretKey key = JobTokenSecretManager.createSecretKey(password);

        return SecureShuffleUtils.hashFromString(data, key);

    }

    protected void readObject(Writable obj, DataInputStream inStream) throws IOException {
        int numBytes = WritableUtils.readVInt(inStream);
        byte[] buffer;
        // For BytesWritable and Text, use the specified length to set the length
        // this causes the "obvious" translations to work. So that if you emit
        // a string "abc" from C++, it shows up as "abc".
        if (obj instanceof BytesWritable) {
            buffer = new byte[numBytes];
            inStream.readFully(buffer);
            ((BytesWritable) obj).set(buffer, 0, numBytes);
        } else if (obj instanceof Text) {
            buffer = new byte[numBytes];
            inStream.readFully(buffer);
            ((Text) obj).set(buffer);
        } else {
            obj.readFields(inStream);
        }
    }

    protected void writeObject(Writable obj, DataOutputStream stream) throws IOException {
        // For Text and BytesWritable, encode them directly, so that they end up
        // in C++ as the natural translations.
        System.err.println("obj: " + obj);

        DataOutputBuffer buffer = new DataOutputBuffer();
        if (obj instanceof Text) {
            Text t = (Text) obj;
            int len = t.getLength();
            WritableUtils.writeVLong(stream, len);
            stream.flush();

            stream.write(t.getBytes(), 0, len);
            stream.flush();
            System.err.println("len: " + len);

        } else if (obj instanceof BytesWritable) {
            BytesWritable b = (BytesWritable) obj;
            int len = b.getLength();
            WritableUtils.writeVLong(stream, len);
            stream.write(b.getBytes(), 0, len);
            System.err.println("len: " + len);
        } else {
            buffer.reset();
            obj.write(buffer);
            int length = buffer.getLength();
            WritableUtils.writeVInt(stream, length);
            stream.write(buffer.getData(), 0, length);
            System.err.println("len: " + length);
        }
        stream.flush();

    }

    protected void initSoket() throws Exception {
        int port = Integer.parseInt(System.getenv("mapreduce.pipes.command.port"));

        System.err.println("port:" + port);

        java.net.InetAddress address = java.net.InetAddress.getLocalHost();

        socket = new Socket(address.getHostName(), port);
        InputStream input = socket.getInputStream();
        OutputStream output = socket.getOutputStream();

        System.err.println("ready to read");
        // try to read
        dataInput = new DataInputStream(input);

        WritableUtils.readVInt(dataInput);

        String str = Text.readString(dataInput);

        Text.readString(dataInput);

        dataOut = new DataOutputStream(output);
        WritableUtils.writeVInt(dataOut, 57);
        String s = createDigest("password".getBytes(), str);

        Text.writeString(dataOut, s);

        // start
        WritableUtils.readVInt(dataInput);
        int cuttentAnswer = WritableUtils.readVInt(dataInput);
        System.out.println("CURRENT_PROTOCOL_VERSION:" + cuttentAnswer);

        // get configuration
        // should be MessageType.SET_JOB_CONF.code
        WritableUtils.readVInt(dataInput);

        // array length

        int j = WritableUtils.readVInt(dataInput);
        for (int i = 0; i < j; i++) {
            Text.readString(dataInput);
            i++;
            Text.readString(dataInput);
        }
    }

    protected void closeSoket() {
        if (socket != null) {
            try {
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}