[slf4j-dev] [GIT] SLF4J: Simple Logging Facade for Java branch, master, updated. 7a7cf32a3e2a9e5bdc4809f5c6a4e9cc0b120ee0

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- Log -----------------------------------------------------------------
http://git.qos.ch/gitweb/?p=slf4j.git;a=commit;h=7a7cf32a3e2a9e5bdc4809f5c6a4e9cc0b120ee0
http://github.com/ceki/slf4j/commit/7a7cf32a3e2a9e5bdc4809f5c6a4e9cc0b120ee0

commit 7a7cf32a3e2a9e5bdc4809f5c6a4e9cc0b120ee0
Author: Ceki Gulcu <ceki at qos.ch>
Date:   Mon Aug 24 14:32:37 2009 +0200

    - updated javadocs.
    
     Added blurb about the performance impact of JUL to SLF4J translation.
     Other indentation changes
    
    - edited legacy.html.
    
      Usage instructions for SLF4JBridgeHandler are found in the javadocs of
      SLF4JBridgeHandler.
    
    - updated .gitignore file

diff --git a/jul-to-slf4j/src/test/java/org/slf4j/bridge/SLF4JBridgeHandlerPerfTest.java b/jul-to-slf4j/src/test/java/org/slf4j/bridge/SLF4JBridgeHandlerPerfTest.java
new file mode 100644
index 0000000..0933696
--- /dev/null
+++ b/jul-to-slf4j/src/test/java/org/slf4j/bridge/SLF4JBridgeHandlerPerfTest.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2004-2008 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 junit.framework.TestCase;
+
+import org.apache.log4j.FileAppender;
+import org.apache.log4j.PatternLayout;
+import org.slf4j.LoggerFactory;
+
+public class SLF4JBridgeHandlerPerfTest extends TestCase {
+
+  static String LOGGER_NAME = "yay";
+  static int RUN_LENGTH = 100*1000;
+
+  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;
+
+  public SLF4JBridgeHandlerPerfTest(String arg0) {
+    super(arg0);
+  }
+
+  protected void setUp() throws Exception {
+    super.setUp();
+    fileAppender = new FileAppender(new PatternLayout("%r [%t] %p %c %x - %m%n"), "target/test-output/toto.log");
+
+    existingHandlers = julRootLogger.getHandlers();
+    for (int i = 0; i < existingHandlers.length; i++) {
+      julRootLogger.removeHandler(existingHandlers[i]);
+    }
+    log4jRoot = org.apache.log4j.Logger.getRootLogger();
+    log4jRoot.addAppender(fileAppender);
+  }
+
+  protected void tearDown() throws Exception {
+    super.tearDown();
+    SLF4JBridgeHandler.uninstall();
+    fileAppender.close();
+    log4jRoot.getLoggerRepository().resetConfiguration();
+    for (int i = 0; i < existingHandlers.length; i++) {
+      julRootLogger.addHandler(existingHandlers[i]);
+    }
+  }
+
+  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;
+  }
+  
+  public void testPerf() {
+    SLF4JBridgeHandler.install();
+    //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));
+  }
+}

-----------------------------------------------------------------------

Summary of changes:
 .../slf4j/bridge/SLF4JBridgeHandlerPerfTest.java   |  109 ++++++++++++++++++++
 1 files changed, 109 insertions(+), 0 deletions(-)
 create mode 100644 jul-to-slf4j/src/test/java/org/slf4j/bridge/SLF4JBridgeHandlerPerfTest.java


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