| /* |
| * 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 java.io.File; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.logging.log4j.Level; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.core.categories.PerformanceTests; |
| import org.apache.logging.log4j.core.junit.LoggerContextRule; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.junit.rules.RuleChain; |
| import org.junit.rules.TestRule; |
| import org.junit.runner.Description; |
| import org.junit.runners.model.Statement; |
| |
| /** |
| * |
| */ |
| @Category(PerformanceTests.class) |
| public class ThreadedTest { |
| private static final String DIR = "target/threaded"; |
| private static final String CONFIG = "log4j-threaded.xml"; |
| private static final int LOOP_CNT = 25; |
| private static final int THREADS = 4; |
| private static final AtomicInteger counter = new AtomicInteger(0); |
| private static final LoggerContextRule context = new LoggerContextRule(CONFIG); |
| |
| private final Logger logger = context.getLogger(ThreadedTest.class.getName()); |
| private volatile Level lvl = Level.DEBUG; |
| |
| // this would look pretty sweet with lambdas |
| @ClassRule |
| public static RuleChain chain = RuleChain.outerRule(new TestRule() { |
| @Override |
| public Statement apply(final Statement base, final Description description) { |
| return new Statement() { |
| @Override |
| public void evaluate() throws Throwable { |
| deleteDir(); |
| try { |
| base.evaluate(); |
| } finally { |
| deleteDir(); |
| } |
| } |
| }; |
| } |
| }).around(context); |
| |
| @Test |
| public void testDeadlock() throws Exception { |
| final ExecutorService pool = Executors.newFixedThreadPool(THREADS * 2); |
| final State state = new State(); |
| for (int count=0; count < THREADS; ++count) { |
| pool.execute(new LoggingRunnable(state)); |
| pool.execute(new StateSettingRunnable(state)); |
| } |
| Thread.sleep(250); |
| pool.shutdown(); |
| System.out.println("Counter = " + counter); |
| } |
| |
| public class LoggingRunnable implements Runnable { |
| private final State state; |
| |
| public LoggingRunnable(final State state) { |
| this.state = state; |
| } |
| @Override |
| public void run() { |
| for (int i=0; i < LOOP_CNT; ++i) { |
| logger.debug(state); |
| } |
| } |
| } |
| public class StateSettingRunnable implements Runnable { |
| private final State state; |
| |
| public StateSettingRunnable(final State state) { |
| this.state = state; |
| } |
| @Override |
| public void run() { |
| for (int i=0; i < LOOP_CNT*4; ++i) { |
| Thread.yield(); |
| state.setState(); |
| } |
| } |
| } |
| |
| private static void deleteDir() { |
| final File dir = new File(DIR); |
| if (dir.exists()) { |
| final File[] files = dir.listFiles(); |
| for (final File file : files) { |
| file.delete(); |
| } |
| dir.delete(); |
| } |
| } |
| |
| class State { |
| |
| synchronized void setState() { |
| // Something takes a long time here |
| logger.debug("hello world"); |
| } |
| |
| synchronized Object getState() { |
| return counter.incrementAndGet(); |
| } |
| |
| @Override |
| public String toString() { |
| return "state=" + getState(); |
| } |
| } |
| } |