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
   *
   *     https://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.avro;
  
  import java.io.ByteArrayOutputStream;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  
  import org.apache.avro.generic.GenericDatumWriter;
  import org.apache.avro.io.DatumWriter;
  import org.apache.avro.io.Encoder;
  import org.apache.avro.io.EncoderFactory;
  import org.apache.avro.util.RandomData;
  
  /**
   * Generates file with objects of a specific schema(that doesn't contain nesting
   * of arrays and maps) with random data. This is only for testing. Generated
   * file contains the count of objects of the specified schema followed by
   * objects serialized using BlockingBinaryEncoder. No other metadata is written
   * to the file. See interoptests.py for more details(interoptests.py reads the
   * file generated here and validates the contents).
   */
  public class GenerateBlockingData {
    private static final int SYNC_INTERVAL = 1000;
    private static ByteArrayOutputStream buffer = new ByteArrayOutputStream(2 * SYNC_INTERVAL);
  
    private static EncoderFactory factory = EncoderFactory.get();
    private static Encoder bufOut = EncoderFactory.get().blockingBinaryEncoder(buffer, null);
    private static int blockCount;
  
    private static void writeBlock(Encoder vout, FileOutputStream out) throws IOException {
      vout.writeLong(blockCount);
      bufOut.flush();
      buffer.writeTo(out);
      buffer.reset();
      blockCount = 0;
    }
  
    public static void main(String[] args) throws Exception {
      if (args.length != 3) {
        System.out.println("Usage: GenerateBlockingData <schemafile> <outputfile> <count>");
        System.exit(-1);
      }
  
      Schema sch = new Schema.Parser().parse(new File(args[0]));
      File outputFile = new File(args[1]);
      int numObjects = Integer.parseInt(args[2]);
  
      FileOutputStream out = new FileOutputStream(outputFile, false);
      DatumWriter<Object> dout = new GenericDatumWriter<>();
      dout.setSchema(sch);
      Encoder vout = factory.directBinaryEncoder(out, null);
      vout.writeLong(numObjects); // metadata:the count of objects in the file
  
      for (Object datum : new RandomData(sch, numObjects)) {
        dout.write(datum, bufOut);
        blockCount++;
        if (buffer.size() >= SYNC_INTERVAL) {
          writeBlock(vout, out);
        }
      }
      if (blockCount > 0) {
        writeBlock(vout, out);
      }
      out.flush();
      out.close();
    }
  }
  