org.apache.htrace.impl.TestPackedBuffer.java Source code

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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.htrace.impl;

import java.nio.ByteBuffer;
import java.util.Random;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.htrace.core.Span;
import org.apache.htrace.util.TestUtil;
import org.junit.Assert;
import org.junit.Test;
import org.msgpack.core.MessagePack;
import org.msgpack.core.MessageUnpacker;

public class TestPackedBuffer {
    private static final Log LOG = LogFactory.getLog(TestPackedBuffer.class);

    @Test(timeout = 60000)
    public void testWriteReqFrame() throws Exception {
        byte[] arr = new byte[PackedBuffer.HRPC_REQ_FRAME_LENGTH];
        ByteBuffer bb = ByteBuffer.wrap(arr);
        PackedBuffer buf = new PackedBuffer(bb);
        PackedBuffer.writeReqFrame(bb, 1, 123, 456);
        Assert.assertEquals(PackedBuffer.HRPC_REQ_FRAME_LENGTH, bb.position());
        Assert.assertEquals("48 54 52 43 " + "01 00 00 00 " + "7b 00 00 00 00 00 00 00 " + "c8 01 00 00",
                buf.toHexString());
    }

    @Test(timeout = 60000)
    public void testPackSpans() throws Exception {
        Random rand = new Random(123);
        byte[] arr = new byte[16384];
        ByteBuffer bb = ByteBuffer.wrap(arr);
        bb.limit(bb.capacity());
        PackedBuffer buf = new PackedBuffer(bb);
        final int NUM_TEST_SPANS = 5;
        Span[] spans = new Span[NUM_TEST_SPANS];
        for (int i = 0; i < NUM_TEST_SPANS; i++) {
            spans[i] = TestUtil.randomSpan(rand);
        }
        for (int i = 0; i < NUM_TEST_SPANS; i++) {
            buf.writeSpan(spans[i]);
        }
        LOG.info("wrote " + buf.toHexString());
        MessagePack msgpack = new MessagePack(PackedBuffer.MSGPACK_CONF);
        MessageUnpacker unpacker = msgpack.newUnpacker(arr, 0, bb.position());
        Span[] respans = new Span[NUM_TEST_SPANS];
        for (int i = 0; i < NUM_TEST_SPANS; i++) {
            respans[i] = PackedBuffer.readSpan(unpacker);
        }
        for (int i = 0; i < NUM_TEST_SPANS; i++) {
            Assert.assertEquals("Failed to read back span " + i, spans[i].toJson(), respans[i].toJson());
        }
    }
}