/**
* 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.ipc;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import java.nio.ByteBuffer;
import org.apache.hadoop.hbase.io.ByteBufferPool;
import org.apache.hadoop.hbase.ipc.RpcServer.CallCleanup;
import org.apache.hadoop.hbase.nio.ByteBuff;
import org.apache.hadoop.hbase.nio.MultiByteBuff;
import org.apache.hadoop.hbase.nio.SingleByteBuff;
import org.apache.hadoop.hbase.testclassification.RPCTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.util.Pair;
import org.junit.Test;
import org.junit.experimental.categories.Category;
@Category({ RPCTests.class, SmallTests.class })
public class TestRpcServer {
@Test
public void testAllocateByteBuffToReadInto() throws Exception {
int maxBuffersInPool = 10;
ByteBufferPool pool = new ByteBufferPool(6 * 1024, maxBuffersInPool);
initPoolWithAllBuffers(pool, maxBuffersInPool);
ByteBuff buff = null;
Pair<ByteBuff, CallCleanup> pair;
// When the request size is less than 1/6th of the pool buffer size. We should use on demand
// created on heap Buffer
pair = RpcServer.allocateByteBuffToReadInto(pool, RpcServer.getMinSizeForReservoirUse(pool),
200);
buff = pair.getFirst();
assertTrue(buff.hasArray());
assertEquals(maxBuffersInPool, pool.getQueueSize());
assertNull(pair.getSecond());
// When the request size is > 1/6th of the pool buffer size.
pair = RpcServer.allocateByteBuffToReadInto(pool, RpcServer.getMinSizeForReservoirUse(pool),
1024);
buff = pair.getFirst();
assertFalse(buff.hasArray());
assertEquals(maxBuffersInPool - 1, pool.getQueueSize());
assertNotNull(pair.getSecond());
pair.getSecond().run();// CallCleanup#run should put back the BB to pool.
assertEquals(maxBuffersInPool, pool.getQueueSize());
// Request size> pool buffer size
pair = RpcServer.allocateByteBuffToReadInto(pool, RpcServer.getMinSizeForReservoirUse(pool),
7 * 1024);
buff = pair.getFirst();
assertFalse(buff.hasArray());
assertTrue(buff instanceof MultiByteBuff);
ByteBuffer[] bbs = ((MultiByteBuff) buff).getEnclosingByteBuffers();
assertEquals(2, bbs.length);
assertTrue(bbs[0].isDirect());
assertTrue(bbs[1].isDirect());
assertEquals(6 * 1024, bbs[0].limit());
assertEquals(1024, bbs[1].limit());
assertEquals(maxBuffersInPool - 2, pool.getQueueSize());
assertNotNull(pair.getSecond());
pair.getSecond().run();// CallCleanup#run should put back the BB to pool.
assertEquals(maxBuffersInPool, pool.getQueueSize());
pair = RpcServer.allocateByteBuffToReadInto(pool, RpcServer.getMinSizeForReservoirUse(pool),
6 * 1024 + 200);
buff = pair.getFirst();
assertFalse(buff.hasArray());
assertTrue(buff instanceof MultiByteBuff);
bbs = ((MultiByteBuff) buff).getEnclosingByteBuffers();
assertEquals(2, bbs.length);
assertTrue(bbs[0].isDirect());
assertFalse(bbs[1].isDirect());
assertEquals(6 * 1024, bbs[0].limit());
assertEquals(200, bbs[1].limit());
assertEquals(maxBuffersInPool - 1, pool.getQueueSize());
assertNotNull(pair.getSecond());
pair.getSecond().run();// CallCleanup#run should put back the BB to pool.
assertEquals(maxBuffersInPool, pool.getQueueSize());
ByteBuffer[] buffers = new ByteBuffer[maxBuffersInPool - 1];
for (int i = 0; i < maxBuffersInPool - 1; i++) {
buffers[i] = pool.getBuffer();
}
pair = RpcServer.allocateByteBuffToReadInto(pool, RpcServer.getMinSizeForReservoirUse(pool),
20 * 1024);
buff = pair.getFirst();
assertFalse(buff.hasArray());
assertTrue(buff instanceof MultiByteBuff);
bbs = ((MultiByteBuff) buff).getEnclosingByteBuffers();
assertEquals(2, bbs.length);
assertTrue(bbs[0].isDirect());
assertFalse(bbs[1].isDirect());
assertEquals(6 * 1024, bbs[0].limit());
assertEquals(14 * 1024, bbs[1].limit());
assertEquals(0, pool.getQueueSize());
assertNotNull(pair.getSecond());
pair.getSecond().run();// CallCleanup#run should put back the BB to pool.
assertEquals(1, pool.getQueueSize());
pool.getBuffer();
pair = RpcServer.allocateByteBuffToReadInto(pool, RpcServer.getMinSizeForReservoirUse(pool),
7 * 1024);
buff = pair.getFirst();
assertTrue(buff.hasArray());
assertTrue(buff instanceof SingleByteBuff);
assertEquals(7 * 1024, ((SingleByteBuff) buff).getEnclosingByteBuffer().limit());
assertNull(pair.getSecond());
}
private void initPoolWithAllBuffers(ByteBufferPool pool, int maxBuffersInPool) {
ByteBuffer[] buffers = new ByteBuffer[maxBuffersInPool];
// Just call getBuffer() on pool 'maxBuffersInPool' so as to init all buffers and then put back
// all. Makes pool with max #buffers.
for (int i = 0; i < maxBuffersInPool; i++) {
buffers[i] = pool.getBuffer();
}
for (ByteBuffer buf : buffers) {
pool.putbackBuffer(buf);
}
}
}