org.apache.carbondata.sdk.file.ConcurrentSdkWriterTest.java Source code

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Here is the source code for org.apache.carbondata.sdk.file.ConcurrentSdkWriterTest.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.carbondata.sdk.file;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import org.apache.carbondata.core.metadata.datatype.DataTypes;

import org.apache.commons.io.FileUtils;
import org.junit.Assert;
import org.junit.Test;

/**
 * multi-thread Test suite for {@link CSVCarbonWriter}
 */
public class ConcurrentSdkWriterTest {

    private static final int recordsPerItr = 10;
    private static final short numOfThreads = 4;

    @Test
    public void testWriteFiles() throws IOException {
        String path = "./testWriteFiles";
        FileUtils.deleteDirectory(new File(path));

        Field[] fields = new Field[2];
        fields[0] = new Field("name", DataTypes.STRING);
        fields[1] = new Field("age", DataTypes.INT);

        ExecutorService executorService = Executors.newFixedThreadPool(numOfThreads);
        try {
            CarbonWriterBuilder builder = CarbonWriter.builder().outputPath(path).withThreadSafe(numOfThreads);
            CarbonWriter writer = builder.withCsvInput(new Schema(fields)).writtenBy("ConcurrentSdkWriterTest")
                    .build();
            // write in multi-thread
            for (int i = 0; i < numOfThreads; i++) {
                executorService.submit(new WriteLogic(writer));
            }
            executorService.shutdown();
            executorService.awaitTermination(2, TimeUnit.HOURS);
            writer.close();
        } catch (Exception e) {
            e.printStackTrace();
            Assert.fail(e.getMessage());
        }

        // read the files and verify the count
        CarbonReader reader;
        try {
            reader = CarbonReader.builder(path, "_temp1121").projection(new String[] { "name", "age" }).build();
            int i = 0;
            while (reader.hasNext()) {
                Object[] row = (Object[]) reader.readNextRow();
                i++;
            }
            Assert.assertEquals(i, numOfThreads * recordsPerItr);
            reader.close();
        } catch (InterruptedException e) {
            e.printStackTrace();
            Assert.fail(e.getMessage());
        }

        FileUtils.deleteDirectory(new File(path));
    }

    class WriteLogic implements Runnable {
        CarbonWriter writer;

        WriteLogic(CarbonWriter writer) {
            this.writer = writer;
        }

        @Override
        public void run() {
            try {
                for (int i = 0; i < recordsPerItr; i++) {
                    writer.write(
                            new String[] { "robot" + (i % 10), String.valueOf(i), String.valueOf((double) i / 2) });
                }
            } catch (IOException e) {
                e.printStackTrace();
                Assert.fail(e.getMessage());
            }
        }
    }

}