| /* |
| * 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.logging.log4j.core; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.core.config.ConfigurationFactory; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileReader; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.hamcrest.Matchers.containsString; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertTrue; |
| |
| public class EventParameterMemoryLeakTest { |
| |
| @BeforeClass |
| public static void beforeClass() { |
| System.setProperty("log4j2.enable.threadlocals", "true"); |
| System.setProperty("log4j2.enable.direct.encoders", "true"); |
| System.setProperty("log4j2.is.webapp", "false"); |
| System.setProperty(ConfigurationFactory.CONFIGURATION_FILE_PROPERTY, "EventParameterMemoryLeakTest.xml"); |
| } |
| |
| @Test |
| @SuppressWarnings("UnusedAssignment") // parameter set to null to allow garbage collection |
| public void testParametersAreNotLeaked() throws Exception { |
| final File file = new File("target", "EventParameterMemoryLeakTest.log"); |
| assertTrue("Deleted old file before test", !file.exists() || file.delete()); |
| |
| final Logger log = LogManager.getLogger("com.foo.Bar"); |
| CountDownLatch latch = new CountDownLatch(1); |
| Object parameter = new ParameterObject("paramValue", latch); |
| log.info("Message with parameter {}", parameter); |
| log.info(parameter); |
| log.info("test", new ObjectThrowable(parameter)); |
| log.info("test {}", "hello", new ObjectThrowable(parameter)); |
| parameter = null; |
| CoreLoggerContexts.stopLoggerContext(file); |
| final BufferedReader reader = new BufferedReader(new FileReader(file)); |
| final String line1 = reader.readLine(); |
| final String line2 = reader.readLine(); |
| final String line3 = reader.readLine(); |
| final String line4 = reader.readLine(); |
| final String line5 = reader.readLine(); |
| reader.close(); |
| file.delete(); |
| assertThat(line1, containsString("Message with parameter paramValue")); |
| assertThat(line2, containsString("paramValue")); |
| assertThat(line3, containsString("paramValue")); |
| assertThat(line4, containsString("paramValue")); |
| assertNull("Expected only three lines", line5); |
| GarbageCollectionHelper gcHelper = new GarbageCollectionHelper(); |
| gcHelper.run(); |
| try { |
| assertTrue("Parameter should have been garbage collected", latch.await(30, TimeUnit.SECONDS)); |
| } finally { |
| gcHelper.close(); |
| } |
| } |
| |
| private static final class ParameterObject { |
| private final String value; |
| private final CountDownLatch latch; |
| ParameterObject(String value, CountDownLatch latch) { |
| this.value = value; |
| this.latch = latch; |
| } |
| |
| @Override |
| public String toString() { |
| return value; |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| latch.countDown(); |
| super.finalize(); |
| } |
| } |
| |
| private static final class ObjectThrowable extends RuntimeException { |
| private final Object object; |
| |
| ObjectThrowable(Object object) { |
| super(String.valueOf(object)); |
| this.object = object; |
| } |
| |
| @Override |
| public String toString() { |
| return "ObjectThrowable " + object; |
| } |
| } |
| } |