content: /*
   * 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.carbondata.core.metadata.datatype.Field;
  
  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());
        }
      }
    }
  
  }
  