Author: ceki Date: Mon Nov 10 21:55:17 2008 New Revision: 1956 Added: logback/trunk/logback-site/src/site/pages/css/sitePrint.css - copied, changed from r1954, /logback/trunk/logback-site/src/site/pages/css/print.css Removed: logback/trunk/logback-site/src/site/pages/css/print.css Modified: logback/trunk/logback-site/src/site/pages/manual/appenders.html logback/trunk/logback-site/src/site/pages/manual/architecture.html logback/trunk/logback-site/src/site/pages/manual/contextSelector.html logback/trunk/logback-site/src/site/pages/manual/filters.html logback/trunk/logback-site/src/site/pages/manual/introduction.html logback/trunk/logback-site/src/site/pages/manual/jmxConfig.html logback/trunk/logback-site/src/site/pages/manual/joran.html logback/trunk/logback-site/src/site/pages/manual/layouts.html logback/trunk/logback-site/src/site/pages/manual/mdc.html Log: - for some reason print.css file gets clobbered by Maven. Consequently, renaming print.css as sitePrint.css. - updating references Copied: logback/trunk/logback-site/src/site/pages/css/sitePrint.css (from r1954, /logback/trunk/logback-site/src/site/pages/css/print.css) ============================================================================== --- /logback/trunk/logback-site/src/site/pages/css/print.css (original) +++ logback/trunk/logback-site/src/site/pages/css/sitePrint.css Mon Nov 10 21:55:17 2008 @@ -1,10 +1,7 @@ -/* - * Print css. - * -*/ + body { margin: 0px; - padding: 0px 0px 2px 0px; + padding: 100px 0px 2px 0px; line-height: 1.3em; font-size: 12px; } @@ -12,6 +9,7 @@ #left, #right { width: 0px; height: 0px; + dispay: none; visibility:hidden; } @@ -20,13 +18,6 @@ margin-left: 0px; /*was: 197*/ } -pre { - white-space: pre-wrap; /* css-3 */ - white-space: -moz-pre-wrap !important; /* Mozilla, since 1999 */ - white-space: -pre-wrap; /* Opera 4-6 */ - white-space: -o-pre-wrap; /* Opera 7 */ - word-wrap: break-word; /* Internet Explorer 5.5+ */ -} table.bodyTable td { vertical-align: text-top; @@ -38,14 +29,3 @@ } -.source { - background:#eee; - border-top: 1px solid #DDDDDD; - border-bottom: 1px solid #DDDDDD; - font-family: Courier, "MS Courier New", Prestige, Everson Monocourrier, monospace; - padding-bottom: 0.5ex; - padding-top: 0.5ex; - padding-left: 1ex; - white-space: pre; -} - Modified: logback/trunk/logback-site/src/site/pages/manual/appenders.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/appenders.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/appenders.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter 4: Appenders</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css" /> </head> <body> Modified: logback/trunk/logback-site/src/site/pages/manual/architecture.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/architecture.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/architecture.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter 2: Architecture</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css" /> </head> <body> Modified: logback/trunk/logback-site/src/site/pages/manual/contextSelector.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/contextSelector.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/contextSelector.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter 8: Context Selector</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css" /> </head> <body> @@ -46,21 +46,18 @@ <h3>Introduction</h3> - <p> - When working with several Web applications, all running on one - server, the multiplications of <code>LoggerContext</code> objects - might reveal itself a tricky issue. + <p>When working with multiple Web applications, all running on the + same server, the multiplication of <code>LoggerContext</code> + objects can be tricky. </p> - - - <p>Logback provides a simple yet powerful way of dealing with - multiple contexts, without corruption of data, nor collusion - between context instances. + <p>Logback provides a mechanism for dealing with multiple + contexts, without corruption of data, nor collision between logger + context instances. </p> <p>One thing we know is that JNDI environments are - independent. Thus setting environment variables in each + independent. Thus, setting environment variables in each application will allow a given component to know which application it is dealing with at the moment. This is basically the mechanism that uses logback to provide easy access to the right Modified: logback/trunk/logback-site/src/site/pages/manual/filters.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/filters.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/filters.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter 6: Filters</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css" /> </head> <body> Modified: logback/trunk/logback-site/src/site/pages/manual/introduction.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/introduction.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/introduction.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter 1: Introduction</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css"/> </head> <body> Modified: logback/trunk/logback-site/src/site/pages/manual/jmxConfig.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/jmxConfig.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/jmxConfig.html Mon Nov 10 21:55:17 2008 @@ -1,24 +1,23 @@ <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/2000/REC-xhtml1-20000126/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> -<head> -<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> -<title>JMX Configuration</title> -<link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> - -</head> -<body> - <script> - prefix='../'; - </script> - <script src="../templates/header.js"></script> - <div id="left"> - <script src="../templates/left.js"></script> - </div> - <div id="right"> - <script src="index_menu.js"></script> - </div> - <div id="content"> + <head> + <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> + <link rel="stylesheet" type="text/css" href="../css/site.css" media="screen" /> + <link rel="stylesheet" type="text/css" href="../css/sitePrint.css" media="print" /> + <title>JMX Configuration</title> + </head> + <body> + <script type="text/javascript"> + prefix='../'; + </script> + <script src="../templates/header.js" type="text/javascript"></script> + <div id="left"> + <script src="../templates/left.js" type="text/javascript"></script> + </div> + <div id="right"> + <script src="index_menu.js" type="text/javascript"></script> + </div> + <div id="content"> <h2>JMX Configurator</h2> @@ -63,6 +62,9 @@ in the figure below: </p> + <p><a name="jmxConfigurator" href="#jmxConfigurator">Screen-shot + of <code>JMXConfigurator</code> viewed in + <code>jconsole</code></a></p> <img src="images/chapter9/jmxConfigurator.gif" alt="jmxConfigurator"/> <p>Thus, you can</p> @@ -90,7 +92,95 @@ <img src="images/chapter9/statusList.gif" alt="statusList.gif"/> + <h3><a name="leak" href="#leak">Avoiding memory leaks</a></h3> + <p>If your application is deployed in a web-server or an + application server, the registration of an + <code>JMXConfigurator</code> instance creates a reference from the + system class loader into your application which will prevent it + from being garbage collected when it is stopped or re-deployed, + resulting in a severe memory leak.</p> + + <p>Thus, unless your application is standalone java application, + you MUST unregister the <code>JMXConfigurator</code> instance from + the JVM's Mbeans server. Invoking the <code>reset</code>() method + of the appropriate <code>LoggerContext</code> will automatically + unregister any JMXConfigurator instance. A good place to reset the + logger context is in the the <code>contextDestroyed</code>() + method of a + <code>javax.servlet.ServletContextListener</code>. Here is sample + code:</p> + + <p class="source">import javax.servlet.ServletContextEvent; +import javax.servlet.ServletContextListener; + +import org.slf4j.LoggerFactory; +import ch.qos.logback.classic.LoggerContext; + +public class MyContextListener implements ServletContextListener { + + public void contextDestroyed(ServletContextEvent sce) { + <b>LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();</b> + <b>lc.reset();</b> + } + + public void contextInitialized(ServletContextEvent sce) { + } +} </p> + + + + + + + <!-- ============ Multiple web-applications ================== --> + + + <h2> + <a name="multiple" href="#multiple"><code>JMXConfigurator</code> + with multiple web-applications</a> + </h2> + + <p>If you deploy multiple web-applications in the same server, + then, and assuming you have not overriden the default <a + href="contextSelector.html">context selector</a>, and assuming you + have placed a copy of <em>logback-*.jar</em> and + <em>slf4j-api.jar</em> under the <em>WEB-INF/lib</em> folder of + each web-application, by default each <code>JMXConfigurator</code> + instance will be registered under the same name, that is, + "ch.qos.logback.classic:Name=default,Type=ch.qos.logback.classic.jmx.JMXConfigurator". In + other words, by default the various <code>JMXConfigurator</code> + instances associated with the logger contexts in each of your + web-applications will collide. + </p> + + <p>To avoid such undesirable collisions, you can instruct each + <code>JMXConfigurator</code> instance to have a different name by + setting the "contextName" attribute of the + <code><jmxConfigurator></code> element in the logback + configuration file. + </p> + + <p>For example, if you deploy two web-applications named "Koala" + and "Wombat", then you would write in Koala's logback + configuration + </p> + + <p class="source"><jmxConfigurator <b>contextName="Koala"</b> /></p> + + <p>and in Wombat logback configuration file, you would write:</p> + + <p class="source"><jmxConfigurator <b>contextName="Womcat"</b> /></p> + + <p>In jconsole's MBeans panel, you would two distinct + <code>JMXConfigurator</code> instances:</p> + + <img src="images/chapter9/multiple.gif" alt="multiple.gif"/> + + <p>You may fully control the name under which JMXConfigurator is + registered with MBeans server with the help of the "objectName" + attribute of <code><jmxConfigurator></code> element.</p> + <!-- ============ JMX enabling your server ================== --> <h3> @@ -107,8 +197,8 @@ href="http://tomcat.apache.org/tomcat-6.0-doc/monitoring.html">Tomcat</a> and <a href="http://docs.codehaus.org/display/JETTY/JMX">Jetty</a>. In - this document, we very briefly describe the required steps for - Tomcat and Jetty. + this document, we briefly describe the required configuration + steps for Tomcat and Jetty. </p> <!-- ================ Configuring Jetty ================== --> @@ -116,11 +206,11 @@ <h4>Enabling JMX in Jetty (tested under JDK 1.5 and JDK 1.6)</h4> <p>The following has been tested under JDK 1.5 and 1.6. Under JDK - 1.6 and later, your server is already JMX enabled by default and - you can, but do not need to, follow the steps discussed below. - Under JDK 1.5, adding JMX support in Jetty requires a number of - additions to the <em>$JETTY_HOME/etc/jetty.xml</em> configuration - file. Here are the elements that need to be added: + 1.6 and later, your server is JMX enabled by default and you can, + but do not need to, follow the steps discussed below. Under JDK + 1.5, adding JMX support in Jetty requires a number of additions to + the <em>$JETTY_HOME/etc/jetty.xml</em> configuration file. Here + are the elements that need to be added: </p> <p class="source"><Call id="MBeanServer" class="java.lang.management.ManagementFactory" @@ -137,34 +227,42 @@ </Call> </Get> </p> - <p>If you wish to access the MBeans exposed by Jetty with - jconsole, then you need start jetty with the - "com.sun.management.jmxremote" system property. + <p>If you wish to access the MBeans exposed by Jetty via the + <code>jconsole</code> application, then you need start jetty after + having set the "com.sun.management.jmxremote" java system + property. </p> - <p>For a standalone version of Jetty, this translates to </p> + <p>For a standalone version of Jetty, this translates to: </p> <p class="source">java <b>-Dcom.sun.management.jmxremote</b> -jar start.jar [config files]</p> <p>And if you wish to launch jetty as a Maven plugin, then you need set the "com.sun.management.jmxremote" system property via - the <code>MAVEN_OPTS</code> shell variable, as follows + the <code>MAVEN_OPTS</code> shell variable: </p> <p class="source"><b>MAVEN_OPTS="-Dcom.sun.management.jmxremote</b>" mvn jetty:run</p> - <p>You can then access via <code>jconsole</code>.</p> + <p>You can then access the MBeans exposed by Jetty as well as + logback's <code>JMXConfigurator</code> via + <code>jconsole</code>.</p> <img src="images/chapter9/jconsole15_jetty.gif" alt="jconsole15_jetty.gif"/> + <p>After you are connected, you should be able to access + <code>JMXXConfigurator</code> as shown in the <a + href="#jmxConfigurator">screenshot</a> above.</p> + <h4>MX4J with Jetty (tested under JDK 1.5 and 1.6)</h4> - <p>Assuming you have already downloaded <a + <p>Ig you wish to acces <code>JMXConfigurator</code> via MX4J's + HTTP interface and assuming you have already downloaded <a href="http://mx4j.sourceforge.net/">MX4J</a>, you then need to - modify the jetty configuration file by adding an instruction to - set the management port. + modify the jetty configuration file discussed previously by adding + an instruction to set the management port. </p> <p class="source"><Call id="MBeanServer" @@ -214,6 +312,11 @@ <p class="source"><a href="http://localhost:8082/">http://localhost:8082/</a></p> + <p>Below is a screen shot view of the MX4J interface.</p> + + <img src="images/chapter9/mx4j_jetty.gif" alt="mx4j_jetty.gif"/> + + <!-- ================ Tomcat ================== --> <h4>Configuring JMX for Tomcat (tested under JDK 1.5 and 1.6)</h4> @@ -227,17 +330,21 @@ <p class="source">CATALINA_OPTS="-Dcom.sun.management.jmxremote"</p> - <p>Once started with these options, Tomcat's JMX compoenents can - be accessed with <code>jconsole</code> by issuing the following - command in a shell: + <p>Once started with these options, Mbeans exposed by Tomcat as + well logback's <code>JMXConfigurator</code> can be accessed with + <code>jconsole</code> by issuing the following command in a shell: </p> <p class="source">jconsole</p> <img src="images/chapter9/jconsole15_tomcat.gif" alt="jconsole15_tomcat.gif"/> + <p>After you are connected, you should be able to access + <code>JMXXConfigurator</code> as shown in the <a + href="#jmxConfigurator">screenshot</a> above.</p> + - <h4>MX4J with Tomcat</h4> + <h4>MX4J with Tomcat (tested under JDK 1.5 and 1.6)</h4> <p>You might prefer to access JMX components via a web-based interface provided by MX4J. In that case, here are the required @@ -276,6 +383,9 @@ <p class="source"><a href="http://localhost:8082">http://localhost:8082/</a></p> + <p>Below is a screen shot view of the MX4J interface.</p> + + <img src="images/chapter9/mx4j_tomcat.gif" alt="mx4j_tomcat.gif"/> Modified: logback/trunk/logback-site/src/site/pages/manual/joran.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/joran.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/joran.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter3: Logback configuration & Joran</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css" /> </head> Modified: logback/trunk/logback-site/src/site/pages/manual/layouts.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/layouts.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/layouts.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter 5: Layouts</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css" /> </head> <body> Modified: logback/trunk/logback-site/src/site/pages/manual/mdc.html ============================================================================== --- logback/trunk/logback-site/src/site/pages/manual/mdc.html (original) +++ logback/trunk/logback-site/src/site/pages/manual/mdc.html Mon Nov 10 21:55:17 2008 @@ -4,7 +4,7 @@ <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>Chapter 7: Diagnostic Context</title> <link rel="stylesheet" type="text/css" media="screen" href="../css/site.css" /> -<link rel="stylesheet" type="text/css" media="print" href="../css/print.css" /> +<link rel="stylesheet" type="text/css" media="print" href="../css/sitePrint.css" /> </head> <body>