/**
* 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.hadoop.hbase.io;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.nio.ByteBuffer;
import java.util.List;
import org.apache.hadoop.hbase.testclassification.IOTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.util.ByteBufferUtils;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.Test;
import org.junit.experimental.categories.Category;
@Category({ IOTests.class, SmallTests.class })
public class TestByteBufferListOutputStream {
@Test
public void testWrites() throws Exception {
ByteBufferPool pool = new ByteBufferPool(10, 3);
ByteBufferListOutputStream bbos = new ByteBufferListOutputStream(pool);
bbos.write(2);// Write a byte
bbos.writeInt(100);// Write an int
byte[] b = Bytes.toBytes("row123");// 6 bytes
bbos.write(b);
// Just use the 3rd BB from pool so that pabos, on request, wont get one
ByteBuffer bb1 = pool.getBuffer();
ByteBuffer bb = ByteBuffer.wrap(Bytes.toBytes("row123_cf1_q1"));// 13 bytes
bbos.write(bb, 0, bb.capacity());
pool.putbackBuffer(bb1);
bbos.writeInt(123);
bbos.writeInt(124);
assertEquals(0, pool.getQueueSize());
List<ByteBuffer> allBufs = bbos.getByteBuffers();
assertEquals(4, allBufs.size());
assertEquals(3, bbos.bufsFromPool.size());
ByteBuffer b1 = allBufs.get(0);
assertEquals(10, b1.remaining());
assertEquals(2, b1.get());
assertEquals(100, b1.getInt());
byte[] bActual = new byte[b.length];
b1.get(bActual, 0, 5);//5 bytes in 1st BB
ByteBuffer b2 = allBufs.get(1);
assertEquals(10, b2.remaining());
b2.get(bActual, 5, 1);// Remaining 1 byte in 2nd BB
assertTrue(Bytes.equals(b, bActual));
bActual = new byte[bb.capacity()];
b2.get(bActual, 0, 9);
ByteBuffer b3 = allBufs.get(2);
assertEquals(8, b3.remaining());
b3.get(bActual, 9, 4);
assertTrue(ByteBufferUtils.equals(bb, 0, bb.capacity(), bActual, 0, bActual.length));
assertEquals(123, b3.getInt());
ByteBuffer b4 = allBufs.get(3);
assertEquals(4, b4.remaining());
assertEquals(124, b4.getInt());
bbos.releaseResources();
assertEquals(3, pool.getQueueSize());
}
}