| /** |
| * |
| * 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.bookkeeper.bookie.storage.ldb; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNull; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.Unpooled; |
| import io.netty.buffer.UnpooledByteBufAllocator; |
| |
| import org.junit.Test; |
| |
| /** |
| * Unit test for {@link ReadCache}. |
| */ |
| public class ReadCacheTest { |
| |
| @Test |
| public void simple() { |
| ReadCache cache = new ReadCache(UnpooledByteBufAllocator.DEFAULT, 10 * 1024); |
| |
| assertEquals(0, cache.count()); |
| assertEquals(0, cache.size()); |
| |
| ByteBuf entry = Unpooled.wrappedBuffer(new byte[1024]); |
| cache.put(1, 0, entry); |
| |
| assertEquals(1, cache.count()); |
| assertEquals(1024, cache.size()); |
| |
| assertEquals(entry, cache.get(1, 0)); |
| assertNull(cache.get(1, 1)); |
| |
| for (int i = 1; i < 10; i++) { |
| cache.put(1, i, entry); |
| } |
| |
| assertEquals(10, cache.count()); |
| assertEquals(10 * 1024, cache.size()); |
| |
| cache.put(1, 10, entry); |
| |
| // First half of entries will have been evicted |
| for (int i = 0; i < 5; i++) { |
| assertNull(cache.get(1, i)); |
| } |
| |
| for (int i = 5; i < 11; i++) { |
| assertEquals(entry, cache.get(1, i)); |
| } |
| |
| cache.close(); |
| } |
| |
| @Test |
| public void emptyCache() { |
| ReadCache cache = new ReadCache(UnpooledByteBufAllocator.DEFAULT, 10 * 1024); |
| |
| assertEquals(0, cache.count()); |
| assertEquals(0, cache.size()); |
| assertEquals(null, cache.get(0, 0)); |
| |
| cache.close(); |
| } |
| |
| @Test |
| public void multipleSegments() { |
| // Test with multiple smaller segments |
| ReadCache cache = new ReadCache(UnpooledByteBufAllocator.DEFAULT, 10 * 1024, 2 * 1024); |
| |
| assertEquals(0, cache.count()); |
| assertEquals(0, cache.size()); |
| |
| for (int i = 0; i < 10; i++) { |
| ByteBuf entry = Unpooled.wrappedBuffer(new byte[1024]); |
| entry.setInt(0, i); |
| cache.put(1, i, entry); |
| } |
| |
| for (int i = 0; i < 10; i++) { |
| ByteBuf res = cache.get(1, i); |
| assertEquals(1, res.refCnt()); |
| |
| assertEquals(1024, res.readableBytes()); |
| assertEquals(i, res.getInt(0)); |
| } |
| |
| assertEquals(10, cache.count()); |
| assertEquals(10 * 1024, cache.size()); |
| |
| // Putting one more entry, should trigger the 1st segment rollover |
| ByteBuf entry = Unpooled.wrappedBuffer(new byte[1024]); |
| cache.put(2, 0, entry); |
| |
| assertEquals(9, cache.count()); |
| assertEquals(9 * 1024, cache.size()); |
| |
| cache.close(); |
| } |
| } |