| /** |
| * 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.hadoop.mapred.nativetask.buffer; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.io.DataInputBuffer; |
| import org.apache.hadoop.mapred.RawKeyValueIterator; |
| import org.apache.hadoop.mapred.RecordWriter; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapred.nativetask.DataReceiver; |
| import org.apache.hadoop.mapred.nativetask.NativeDataSource; |
| import org.apache.hadoop.mapred.nativetask.NativeDataTarget; |
| import org.apache.hadoop.mapred.nativetask.handlers.BufferPullee; |
| import org.apache.hadoop.mapred.nativetask.handlers.BufferPuller; |
| import org.apache.hadoop.mapred.nativetask.handlers.BufferPushee; |
| import org.apache.hadoop.mapred.nativetask.handlers.BufferPusher; |
| import org.apache.hadoop.mapred.nativetask.handlers.IDataLoader; |
| import org.apache.hadoop.mapred.nativetask.testutil.TestInput; |
| import org.apache.hadoop.mapred.nativetask.testutil.TestInput.KV; |
| import org.apache.hadoop.mapred.nativetask.util.ReadWriteBuffer; |
| import org.apache.hadoop.util.Progress; |
| |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| @SuppressWarnings({ "rawtypes", "unchecked"}) |
| public class TestBufferPushPull { |
| |
| public static int BUFFER_LENGTH = 100; // 100 bytes |
| public static int INPUT_KV_COUNT = 1000; |
| private KV<BytesWritable, BytesWritable>[] dataInput; |
| |
| @Before |
| public void setUp() { |
| this.dataInput = TestInput.getMapInputs(INPUT_KV_COUNT); |
| } |
| |
| @Test |
| public void testPush() throws Exception { |
| final byte[] buff = new byte[BUFFER_LENGTH]; |
| |
| final InputBuffer input = new InputBuffer(buff); |
| |
| final OutputBuffer out = new OutputBuffer(buff); |
| |
| final Class<BytesWritable> iKClass = BytesWritable.class; |
| final Class<BytesWritable> iVClass = BytesWritable.class; |
| |
| final RecordWriterForPush writer = new RecordWriterForPush() { |
| @Override |
| public void write(BytesWritable key, BytesWritable value) throws IOException { |
| final KV expect = dataInput[count++]; |
| Assert.assertEquals(expect.key.toString(), key.toString()); |
| Assert.assertEquals(expect.value.toString(), value.toString()); |
| } |
| }; |
| |
| final BufferPushee pushee = new BufferPushee(iKClass, iVClass, writer); |
| |
| final PushTarget handler = new PushTarget(out) { |
| |
| @Override |
| public void sendData() throws IOException { |
| final int outputLength = out.length(); |
| input.rewind(0, outputLength); |
| out.rewind(); |
| pushee.collect(input); |
| } |
| }; |
| |
| final BufferPusher pusher = new BufferPusher(iKClass, iVClass, handler); |
| |
| writer.reset(); |
| for (int i = 0; i < INPUT_KV_COUNT; i++) { |
| pusher.collect(dataInput[i].key, dataInput[i].value); |
| } |
| pusher.close(); |
| pushee.close(); |
| } |
| |
| @Test |
| public void testPull() throws Exception { |
| final byte[] buff = new byte[BUFFER_LENGTH]; |
| |
| final InputBuffer input = new InputBuffer(buff); |
| |
| final OutputBuffer out = new OutputBuffer(buff); |
| |
| final Class<BytesWritable> iKClass = BytesWritable.class; |
| final Class<BytesWritable> iVClass = BytesWritable.class; |
| |
| final NativeHandlerForPull handler = new NativeHandlerForPull(input, out); |
| |
| final KeyValueIterator iter = new KeyValueIterator(); |
| final BufferPullee pullee = new BufferPullee(iKClass, iVClass, iter, handler); |
| handler.setDataLoader(pullee); |
| |
| final BufferPuller puller = new BufferPuller(handler); |
| handler.setDataReceiver(puller); |
| |
| int count = 0; |
| |
| while (puller.next()) { |
| final DataInputBuffer key = puller.getKey(); |
| final DataInputBuffer value = puller.getValue(); |
| |
| final BytesWritable keyBytes = new BytesWritable(); |
| final BytesWritable valueBytes = new BytesWritable(); |
| |
| keyBytes.readFields(key); |
| valueBytes.readFields(value); |
| |
| Assert.assertEquals(dataInput[count].key.toString(), keyBytes.toString()); |
| Assert.assertEquals(dataInput[count].value.toString(), valueBytes.toString()); |
| |
| count++; |
| } |
| |
| puller.close(); |
| pullee.close(); |
| } |
| |
| public abstract class PushTarget implements NativeDataTarget { |
| OutputBuffer out; |
| |
| PushTarget(OutputBuffer out) { |
| this.out = out; |
| } |
| |
| @Override |
| public abstract void sendData() throws IOException; |
| |
| @Override |
| public void finishSendData() throws IOException { |
| sendData(); |
| } |
| |
| @Override |
| public OutputBuffer getOutputBuffer() { |
| return out; |
| } |
| } |
| |
| public abstract class RecordWriterForPush implements RecordWriter<BytesWritable, BytesWritable> { |
| |
| protected int count = 0; |
| |
| RecordWriterForPush() { |
| } |
| |
| @Override |
| public abstract void write(BytesWritable key, BytesWritable value) throws IOException; |
| |
| @Override |
| public void close(Reporter reporter) throws IOException { |
| } |
| |
| public void reset() { |
| count = 0; |
| } |
| }; |
| |
| public static class NativeHandlerForPull implements NativeDataSource, NativeDataTarget { |
| |
| InputBuffer in; |
| private final OutputBuffer out; |
| |
| private IDataLoader dataLoader; |
| private DataReceiver dataReceiver; |
| |
| public NativeHandlerForPull(InputBuffer input, OutputBuffer out) { |
| this.in = input; |
| this.out = out; |
| } |
| |
| @Override |
| public InputBuffer getInputBuffer() { |
| return in; |
| } |
| |
| @Override |
| public void setDataReceiver(DataReceiver handler) { |
| this.dataReceiver = handler; |
| } |
| |
| @Override |
| public void loadData() throws IOException { |
| final int size = dataLoader.load(); |
| } |
| |
| public void setDataLoader(IDataLoader dataLoader) { |
| this.dataLoader = dataLoader; |
| } |
| |
| @Override |
| public void sendData() throws IOException { |
| final int len = out.length(); |
| out.rewind(); |
| in.rewind(0, len); |
| dataReceiver.receiveData(); |
| } |
| |
| @Override |
| public void finishSendData() throws IOException { |
| dataReceiver.receiveData(); |
| } |
| |
| @Override |
| public OutputBuffer getOutputBuffer() { |
| return this.out; |
| } |
| } |
| |
| public class KeyValueIterator implements RawKeyValueIterator { |
| int count = 0; |
| BytesWritable key; |
| BytesWritable value; |
| |
| @Override |
| public DataInputBuffer getKey() throws IOException { |
| return convert(key); |
| } |
| |
| @Override |
| public DataInputBuffer getValue() throws IOException { |
| return convert(value); |
| } |
| |
| private DataInputBuffer convert(BytesWritable b) throws IOException { |
| final ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| b.write(new DataOutputStream(out)); |
| final byte[] array = out.toByteArray(); |
| final DataInputBuffer result = new DataInputBuffer(); |
| result.reset(array, array.length); |
| return result; |
| } |
| |
| @Override |
| public boolean next() throws IOException { |
| if (count < INPUT_KV_COUNT) { |
| key = dataInput[count].key; |
| value = dataInput[count].key; |
| count++; |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| } |
| |
| @Override |
| public Progress getProgress() { |
| return null; |
| } |
| }; |
| } |