/**
* 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.avro;
import org.apache.avro.generic.GenericDatumWriter;
import org.apache.avro.io.BinaryEncoder;
import org.apache.avro.io.BlockingBinaryEncoder;
import org.apache.avro.io.DatumWriter;
import org.apache.avro.io.Encoder;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* 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 Encoder bufOut = new BlockingBinaryEncoder(buffer);
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 = Schema.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<Object>();
dout.setSchema(sch);
Encoder vout = new BinaryEncoder(out);
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();
}
}