| /* |
| * 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.appender; |
| |
| import org.apache.logging.log4j.Level; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.core.async.DefaultAsyncQueueFullPolicy; |
| import org.apache.logging.log4j.core.async.EventRoute; |
| import org.apache.logging.log4j.core.junit.LoggerContextSource; |
| import org.apache.logging.log4j.core.junit.Named; |
| import org.apache.logging.log4j.test.appender.BlockingAppender; |
| import org.junit.jupiter.api.AfterEach; |
| import org.junit.jupiter.api.Test; |
| |
| import java.lang.reflect.Field; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| |
| /** |
| * Tests the AsyncAppender (LOG4J2-1080) event routing logic: |
| * <pre> |
| * If not BLOCKING, then offer the event to the queue and send to error appender if queue full. |
| * If BLOCKING, then (LOG4J2-471) |
| * if queue full (non-blocking call to queue.offer(event) failed) then |
| * if thread==backgroundThread delegate to event router |
| * else queue.add(event) // blocking call |
| * </pre> |
| */ |
| @LoggerContextSource("log4j-asynch-queue-full.xml") |
| public class AsyncAppenderQueueFullPolicyTest { |
| |
| private final BlockingAppender blockingAppender; |
| private final AsyncAppender asyncAppender; |
| private final CountingAsyncQueueFullPolicy policy; |
| |
| public AsyncAppenderQueueFullPolicyTest( |
| @Named("Block") final BlockingAppender blockingAppender, @Named("Async") final AsyncAppender asyncAppender) |
| throws Exception { |
| this.blockingAppender = blockingAppender; |
| this.asyncAppender = asyncAppender; |
| final Field field = AsyncAppender.class.getDeclaredField("asyncQueueFullPolicy"); |
| field.setAccessible(true); |
| policy = new CountingAsyncQueueFullPolicy(); |
| field.set(asyncAppender, policy); |
| policy.queueFull.set(0L); |
| } |
| |
| @AfterEach |
| public void after() { |
| blockingAppender.running = false; |
| policy.queueFull.set(0L); |
| } |
| |
| @Test |
| public void testRouter() throws Exception { |
| final Logger logger = LogManager.getLogger(AsyncAppenderQueueFullPolicyTest.class); |
| |
| assertEquals(4, asyncAppender.getQueueCapacity()); |
| logger.error("event 1 - gets taken off the queue"); |
| logger.warn("event 2"); |
| logger.info("event 3"); |
| logger.info("event 4"); |
| while (asyncAppender.getQueueRemainingCapacity() == 0) { |
| Thread.yield(); // wait until background thread takes one element off the queue |
| } |
| logger.info("event 5 - now the queue is full"); |
| assertEquals(0, asyncAppender.getQueueRemainingCapacity(), "queue remaining capacity"); |
| assertEquals(0, policy.queueFull.get(), "EventRouter invocations"); |
| |
| final Thread release = new Thread("AsyncAppenderReleaser") { |
| @Override |
| public void run() { |
| while (policy.queueFull.get() == 0) { |
| try { |
| Thread.sleep(10L); |
| } catch (final InterruptedException ignored) { |
| //ignored |
| } |
| } |
| blockingAppender.running = false; |
| } |
| }; |
| release.setDaemon(true); |
| release.start(); |
| logger.fatal("this blocks until queue space available"); |
| assertEquals(1, policy.queueFull.get()); |
| } |
| |
| public static class CountingAsyncQueueFullPolicy extends DefaultAsyncQueueFullPolicy { |
| AtomicLong queueFull = new AtomicLong(); |
| @Override |
| public EventRoute getRoute(final long backgroundThreadId, final Level level) { |
| queueFull.incrementAndGet(); |
| return EventRoute.ENQUEUE; |
| } |
| } |
| } |