org.apache.hadoop.hbase.codec.CodecPerformance.java Source code

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Here is the source code for org.apache.hadoop.hbase.codec.CodecPerformance.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 org.apache.hadoop.hbase.codec;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.codec.CellCodec;
import org.apache.hadoop.hbase.codec.Codec;
import org.apache.hadoop.hbase.codec.KeyValueCodec;
import org.apache.hadoop.hbase.codec.MessageCodec;
import org.apache.hadoop.hbase.io.CellOutputStream;
import org.apache.hadoop.hbase.util.Bytes;

/**
 * Do basic codec performance eval.
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class CodecPerformance {
    public static final Log LOG = LogFactory.getLog(CodecPerformance.class);

    static Cell[] getCells(final int howMany) {
        Cell[] cells = new Cell[howMany];
        for (int i = 0; i < howMany; i++) {
            byte[] index = Bytes.toBytes(i);
            KeyValue kv = new KeyValue(index, Bytes.toBytes("f"), index, index);
            cells[i] = kv;
        }
        return cells;
    }

    static int getRoughSize(final Cell[] cells) {
        int size = 0;
        for (Cell c : cells) {
            size += c.getRowLength() + c.getFamilyLength() + c.getQualifierLength() + c.getValueLength();
            size += Bytes.SIZEOF_LONG + Bytes.SIZEOF_BYTE;
        }
        return size;
    }

    static byte[] runEncoderTest(final int index, final int initialBufferSize, final ByteArrayOutputStream baos,
            final CellOutputStream encoder, final Cell[] cells) throws IOException {
        long startTime = System.currentTimeMillis();
        for (int i = 0; i < cells.length; i++) {
            encoder.write(cells[i]);
        }
        encoder.flush();
        LOG.info("" + index + " encoded count=" + cells.length + " in " + (System.currentTimeMillis() - startTime)
                + "ms for encoder " + encoder);
        // Ensure we did not have to grow the backing buffer.
        assertTrue(baos.size() < initialBufferSize);
        return baos.toByteArray();
    }

    static Cell[] runDecoderTest(final int index, final int count, final CellScanner decoder) throws IOException {
        Cell[] cells = new Cell[count];
        long startTime = System.currentTimeMillis();
        for (int i = 0; decoder.advance(); i++) {
            cells[i] = decoder.current();
        }
        LOG.info("" + index + " decoded count=" + cells.length + " in " + (System.currentTimeMillis() - startTime)
                + "ms for decoder " + decoder);
        // Ensure we did not have to grow the backing buffer.
        assertTrue(cells.length == count);
        return cells;
    }

    static void verifyCells(final Cell[] input, final Cell[] output) {
        assertEquals(input.length, output.length);
        for (int i = 0; i < input.length; i++) {
            input[i].equals(output[i]);
        }
    }

    static void doCodec(final Codec codec, final Cell[] cells, final int cycles, final int count,
            final int initialBufferSize) throws IOException {
        byte[] bytes = null;
        Cell[] cellsDecoded = null;
        for (int i = 0; i < cycles; i++) {
            ByteArrayOutputStream baos = new ByteArrayOutputStream(initialBufferSize);
            Codec.Encoder encoder = codec.getEncoder(baos);
            bytes = runEncoderTest(i, initialBufferSize, baos, encoder, cells);
        }
        for (int i = 0; i < cycles; i++) {
            ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
            Codec.Decoder decoder = codec.getDecoder(bais);
            cellsDecoded = CodecPerformance.runDecoderTest(i, count, decoder);
        }
        verifyCells(cells, cellsDecoded);
    }

    public static void main(String[] args) throws IOException {
        // How many Cells to encode/decode on each cycle.
        final int count = 100000;
        // How many times to do an operation; repeat gives hotspot chance to warm up.
        final int cycles = 30;

        Cell[] cells = getCells(count);
        int size = getRoughSize(cells);
        int initialBufferSize = 2 * size; // Multiply by 2 to ensure we don't have to grow buffer

        // Test KeyValue codec.
        doCodec(new KeyValueCodec(), cells, cycles, count, initialBufferSize);
        doCodec(new CellCodec(), cells, cycles, count, initialBufferSize);
        doCodec(new MessageCodec(), cells, cycles, count, initialBufferSize);
    }
}