gobblin.writer.ThrottleWriterTest.java Source code

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Here is the source code for gobblin.writer.ThrottleWriterTest.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 gobblin.writer;

import static org.mockito.Mockito.*;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

import gobblin.configuration.ConfigurationKeys;
import gobblin.configuration.State;
import gobblin.writer.ThrottleWriter.ThrottleType;
import gobblin.util.FinalState;

import org.apache.commons.lang3.mutable.MutableLong;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.testng.Assert;
import org.testng.annotations.Test;

import com.google.common.base.Stopwatch;

@Test(groups = { "gobblin.writer" })
public class ThrottleWriterTest {

    public void testThrottleQps() throws IOException {
        DataWriter<Void> writer = mock(DataWriter.class);
        int parallelism = 2;
        int qps = 4;
        DataWriter<Void> throttleWriter = setup(writer, parallelism, qps, ThrottleType.QPS);

        int count = 0;
        long duration = 10L;
        Stopwatch stopwatch = Stopwatch.createStarted();
        while (stopwatch.elapsed(TimeUnit.SECONDS) <= duration) {
            throttleWriter.write(null);
            count++;
        }

        int expected = (int) (qps * duration);
        Assert.assertTrue(count <= expected + qps * 2,
                "Request too high " + count + " , QPS " + qps + " for duration " + duration + " second ");
        Assert.assertTrue(count >= expected - qps * 2,
                "Request too low " + count + " , QPS " + qps + " for duration " + duration + " second ");
    }

    public void testThrottleBytes() throws IOException {
        DataWriter<Void> writer = mock(DataWriter.class);
        final MutableLong mockBytes = new MutableLong();
        when(writer.bytesWritten()).thenAnswer(new Answer<Long>() {
            @Override
            public Long answer(InvocationOnMock invocation) throws Throwable {
                mockBytes.add(1L); //Delta bytes
                return mockBytes.getValue();
            }
        });

        int parallelism = 2;
        int bps = 2;
        DataWriter<Void> throttleWriter = setup(writer, parallelism, bps, ThrottleType.Bytes);

        int count = 0;
        long duration = 10L;
        Stopwatch stopwatch = Stopwatch.createStarted();
        while (stopwatch.elapsed(TimeUnit.SECONDS) <= duration) {
            throttleWriter.write(null);
            count++;
        }

        int expected = (int) (bps * duration);
        Assert.assertTrue(count <= expected + bps * 2);
        Assert.assertTrue(count >= expected - bps * 2);
    }

    public void testGetFinalState() throws IOException {
        PartitionedDataWriter writer = mock(PartitionedDataWriter.class);
        when(writer.getFinalState()).thenReturn(new State());

        int parallelism = 2;
        int qps = 4;
        DataWriter<Void> throttleWriter = setup(writer, parallelism, qps, ThrottleType.QPS);

        State state = ((FinalState) throttleWriter).getFinalState();

        verify(writer, times(1)).getFinalState();
        Assert.assertTrue(state.contains(ThrottleWriter.THROTTLED_TIME_KEY));
    }

    private DataWriter<Void> setup(DataWriter<Void> writer, int parallelism, int rate, ThrottleType type)
            throws IOException {
        State state = new State();

        state.appendToSetProp(ThrottleWriter.WRITER_LIMIT_RATE_LIMIT_KEY, Integer.toString(rate * parallelism));
        state.appendToSetProp(ThrottleWriter.WRITER_THROTTLE_TYPE_KEY, type.name());

        state.appendToSetProp(ConfigurationKeys.TASK_EXECUTOR_THREADPOOL_SIZE_KEY, Integer.toString(parallelism));
        state.appendToSetProp(ConfigurationKeys.SOURCE_MAX_NUMBER_OF_PARTITIONS, Integer.toString(parallelism));

        DataWriterWrapperBuilder<Void> builder = new DataWriterWrapperBuilder<>(writer, state);
        return builder.build();
    }
}