| /* |
| * 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.cassandra.utils.concurrent; |
| |
| import org.junit.Test; |
| |
| import junit.framework.Assert; |
| import org.apache.cassandra.utils.ObjectSizes; |
| |
| public class RefCountedTest |
| { |
| |
| private static final class Tidier implements RefCounted.Tidy |
| { |
| boolean tidied; |
| |
| public void tidy() |
| { |
| tidied = true; |
| } |
| |
| public String name() |
| { |
| return "test tidy"; |
| } |
| } |
| |
| @Test |
| public void testLeak() throws InterruptedException |
| { |
| Tidier tidier = new Tidier(); |
| Ref<?> obj = new Ref(null, tidier); |
| obj.tryRef(); |
| obj.release(); |
| System.gc(); |
| System.gc(); |
| Thread.sleep(1000); |
| Assert.assertTrue(tidier.tidied); |
| } |
| |
| @Test |
| public void testSeriousLeak() throws InterruptedException |
| { |
| Tidier tidier = new Tidier(); |
| new Ref(null, tidier); |
| System.gc(); |
| System.gc(); |
| System.gc(); |
| System.gc(); |
| Thread.sleep(1000); |
| Assert.assertTrue(tidier.tidied); |
| } |
| |
| @Test |
| public void testDoubleRelease() throws InterruptedException |
| { |
| Tidier tidier = null; |
| try |
| { |
| tidier = new Tidier(); |
| Ref<?> obj = new Ref(null, tidier); |
| obj.release(); |
| obj.release(); |
| Assert.assertTrue(false); |
| } |
| catch (Exception e) |
| { |
| } |
| } |
| |
| @Test |
| public void testMemoryLeak() |
| { |
| Tidier tidier = new Tidier(); |
| Ref<Object> ref = new Ref(null, tidier); |
| long initialSize = ObjectSizes.measureDeep(ref); |
| for (int i = 0 ; i < 1000 ; i++) |
| ref.ref().release(); |
| long finalSize = ObjectSizes.measureDeep(ref); |
| if (finalSize > initialSize * 2) |
| throw new AssertionError(); |
| ref.release(); |
| } |
| } |