| /** |
| * Copyright (c) 2004-2011 QOS.ch |
| * All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| */ |
| package org.slf4j.bridge; |
| |
| import java.util.logging.Handler; |
| import java.util.logging.LogManager; |
| |
| import org.apache.log4j.FileAppender; |
| import org.apache.log4j.PatternLayout; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.slf4j.LoggerFactory; |
| |
| public class SLF4JBridgeHandlerPerfTest { |
| |
| static String LOGGER_NAME = "yay"; |
| static int RUN_LENGTH = 100 * 1000; |
| |
| // set to false to test enabled logging performance |
| boolean disabledLogger = true; |
| |
| FileAppender fileAppender; |
| org.apache.log4j.Logger log4jRoot; |
| java.util.logging.Logger julRootLogger = LogManager.getLogManager().getLogger(""); |
| |
| java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger(LOGGER_NAME); |
| org.slf4j.Logger slf4jLogger = LoggerFactory.getLogger(LOGGER_NAME); |
| |
| Handler[] existingHandlers; |
| |
| @Before |
| public void setUp() throws Exception { |
| fileAppender = new FileAppender(new PatternLayout("%r [%t] %p %c %x - %m%n"), "target/test-output/toto.log"); |
| |
| existingHandlers = julRootLogger.getHandlers(); |
| for (Handler existingHandler : existingHandlers) { |
| julRootLogger.removeHandler(existingHandler); |
| } |
| log4jRoot = org.apache.log4j.Logger.getRootLogger(); |
| log4jRoot.addAppender(fileAppender); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| SLF4JBridgeHandler.uninstall(); |
| fileAppender.close(); |
| log4jRoot.getLoggerRepository().resetConfiguration(); |
| for (Handler existingHandler : existingHandlers) { |
| julRootLogger.addHandler(existingHandler); |
| } |
| } |
| |
| double julLoggerLoop() { |
| long start = System.nanoTime(); |
| for (int i = 0; i < RUN_LENGTH; i++) { |
| julLogger.info("jul"); |
| } |
| long end = System.nanoTime(); |
| return (end - start) * 1.0 / RUN_LENGTH; |
| } |
| |
| double slf4jLoggerLoop() { |
| long start = System.nanoTime(); |
| for (int i = 0; i < RUN_LENGTH; i++) { |
| slf4jLogger.info("slf4j"); |
| } |
| long end = System.nanoTime(); |
| return (end - start) * 1.0 / RUN_LENGTH; |
| } |
| |
| @Test |
| public void testPerf() { |
| SLF4JBridgeHandler.install(); |
| |
| if (disabledLogger) { |
| log4jRoot.setLevel(org.apache.log4j.Level.ERROR); |
| } |
| julLoggerLoop(); |
| double julAvg = julLoggerLoop(); |
| System.out.println("Average cost per call (JUL->SLF4J->log4j): " + julAvg + " nanos"); |
| |
| slf4jLoggerLoop(); |
| double slf4jAvg = slf4jLoggerLoop(); |
| System.out.println("Average cost per call (SLF4J->log4j): " + slf4jAvg + " nanos"); |
| System.out.println("Ratio " + (julAvg / slf4jAvg)); |
| } |
| } |