com.datatorrent.lib.io.fs.AbstractThroughputFileInputOperatorTest.java Source code

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Here is the source code for com.datatorrent.lib.io.fs.AbstractThroughputFileInputOperatorTest.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 com.datatorrent.lib.io.fs;

import java.io.IOException;
import java.util.Collections;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import org.apache.commons.lang.mutable.MutableLong;

import com.datatorrent.api.Partitioner.Partition;
import com.datatorrent.api.Stats.OperatorStats;
import com.datatorrent.api.StatsListener.BatchedOperatorStats;
import com.datatorrent.api.StatsListener.Response;
import com.datatorrent.lib.counters.BasicCounters;
import com.datatorrent.lib.io.fs.AbstractFileInputOperator.FailedFile;
import com.datatorrent.lib.io.fs.AbstractFileInputOperator.FileCounters;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.when;

public class AbstractThroughputFileInputOperatorTest {
    private AbstractThroughputFileInputOperator<String> underTest;
    @Mock
    private Partition<AbstractFileInputOperator<String>> mockPartition;
    @Mock
    private BatchedOperatorStats mockBatchStats;
    @Mock
    private OperatorStats mockOperatorStats;
    @Mock
    private BasicCounters<MutableLong> fileCountersMock;
    @Mock
    private MutableLong fileCounterMock;

    @Before
    public void setup() {
        underTest = new ThroughputFileInputOperator();
        MockitoAnnotations.initMocks(this);

        when(mockPartition.getPartitionedInstance()).thenReturn(underTest);
    }

    @Test
    public void testInitialPartitioning() {
        underTest.setPartitionCount(4);
        underTest.setPreferredMaxPendingFilesPerOperator(6);

        for (int i = 0; i < 74; i++) {
            underTest.pendingFiles.add("file-" + i);
        }

        int partitioncount = underTest.getNewPartitionCount(Collections.singleton(mockPartition), null);
        Assert.assertEquals(4, partitioncount);
    }

    @Test
    public void testProcessStats() throws Exception {
        underTest.setPartitionCount(4);
        underTest.setPreferredMaxPendingFilesPerOperator(10);

        for (int i = 0; i < 21; i++) {
            underTest.pendingFiles.add("file-" + i);
        }

        mockOperatorStats.counters = fileCountersMock;
        when(mockPartition.getStats()).thenReturn(mockBatchStats);
        when(mockBatchStats.getLastWindowedStats()).thenReturn(Collections.singletonList(mockOperatorStats));
        when(fileCountersMock.getCounter(any(FileCounters.class))).thenReturn(fileCounterMock);
        when(fileCounterMock.getValue()).thenReturn(20L);

        Response response = underTest.processStats(mockBatchStats);

        Assert.assertTrue(response.repartitionRequired);
    }

    @Test
    public void testRepartitionNotRequired() {
        underTest.setPartitionCount(4);
        underTest.setPreferredMaxPendingFilesPerOperator(10);
        underTest.setRepartitionInterval(60 * 1000);
        underTest.lastRepartition = System.currentTimeMillis();

        for (int i = 0; i < 10; i++) {
            underTest.pendingFiles.add("file-" + i);
        }

        mockOperatorStats.counters = fileCountersMock;
        when(mockPartition.getStats()).thenReturn(mockBatchStats);
        when(mockBatchStats.getLastWindowedStats()).thenReturn(Collections.singletonList(mockOperatorStats));
        when(fileCountersMock.getCounter(any(FileCounters.class))).thenReturn(fileCounterMock);
        when(fileCounterMock.getValue()).thenReturn(10L);

        Response response = underTest.processStats(mockBatchStats);

        Assert.assertFalse(response.repartitionRequired);
    }

    @Test
    public void testRepartitioningForPendingFiles() {
        underTest.setPartitionCount(4);
        underTest.setPreferredMaxPendingFilesPerOperator(10);

        for (int i = 0; i < 21; i++) {
            underTest.pendingFiles.add("file-" + i);
        }

        when(mockPartition.getStats()).thenReturn(mockBatchStats);
        int partitioncount = underTest.getNewPartitionCount(Collections.singleton(mockPartition), null);
        Assert.assertEquals(3, partitioncount);
    }

    @Test
    public void testRepartitioningForFailedFiles() {
        underTest.setPartitionCount(6);
        underTest.setPreferredMaxPendingFilesPerOperator(6);

        for (int i = 0; i < 21; i++) {
            underTest.failedFiles.add(new FailedFile("file-" + i, 0));
        }

        when(mockPartition.getStats()).thenReturn(mockBatchStats);
        int partitioncount = underTest.getNewPartitionCount(Collections.singleton(mockPartition), null);
        Assert.assertEquals(4, partitioncount);
    }

    @Test
    public void testRepartitioningForUnfinishedFiles() {
        underTest.setPartitionCount(5);
        underTest.setPreferredMaxPendingFilesPerOperator(3);

        for (int i = 0; i < 21; i++) {
            underTest.pendingFiles.add("file-" + i);
        }

        when(mockPartition.getStats()).thenReturn(mockBatchStats);
        int partitioncount = underTest.getNewPartitionCount(Collections.singleton(mockPartition), null);
        Assert.assertEquals(5, partitioncount);
    }

    public static class ThroughputFileInputOperator extends AbstractThroughputFileInputOperator<String> {
        @Override
        protected String readEntity() throws IOException {
            return "testData";
        }

        @Override
        protected void emit(String tuple) {
        }
    }
}