1. 把 D:\jboss-4.0.5.GA\server\default\conf 里面的 log4j.xml 改名為 jboss-log4j.xml
2. 編輯 D:\jboss-4.0.5.GA\server\default\conf 里面的 jboss-service.xml 找到
<!-- ==================================================================== -->
<!-- Log4j Initialization -->
<!-- ==================================================================== -->
<mbean code="org.jboss.logging.Log4jService"
name="jboss.system:type=Log4jService,service=Logging"
xmbean-dd="resource:xmdesc/Log4jService-xmbean.xml">
<attribute name="ConfigurationURL">resource:log4j.xml</attribute>
<!-- Set the org.apache.log4j.helpers.LogLog.setQuiteMode. As of log4j1.2.8
this needs to be set to avoid a possible deadlock on exception at the
appender level. See bug#696819.
-->
<attribute name="Log4jQuietMode">true</attribute>
<!-- How frequently in seconds the ConfigurationURL is checked for changes -->
<attribute name="RefreshPeriod">60</attribute>
</mbean>
把 resource:log4j.xml 改為 resource:jboss-log4j.xml
3. 在自己的應用程序的 WEB-INF 目錄中添加一個 jboss-web.xml 內容如下
<?xml version="1.0" encoding="UTF-8"?>
<jboss-web>
<class-loading java2ClassLoadingCompliance="false">
<loader-repository>
ConfigTest:loader=ConfigTest.war
<loader-repository-config>java2ParentDelegation=false
</loader-repository-config>
</loader-repository>
</class-loading>
</jboss-web>
4. 把 log4j.jar 加到 build-path 中
5. 在自己的應用程序的 WEB-INF 目錄中添加一個 log4j.properties 內容如下：
#Global variable definition
LOG_LEVEL=DEBUG
LOG_FILE1=D:/jboss-4.0.5.GA/server/default/log/configtest1.log
LOG_FILE2=D:/jboss-4.0.5.GA/server/default/log/configtest2.log
# com.microsoft Logger
log4j.logger.org.stephencat.test=${LOG_LEVEL}, logfile1
log4j.additivity.org.stephencat.test=false
# com.microsoft Logger
log4j.logger.org.stephencat.cat=${LOG_LEVEL}, logfile2
log4j.additivity.org.stephencat.cat=false
# Console Appender Definition
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%-5p %c(%t) %x:%m%n
#log4j.appender.stdout.layout.ConversionPattern=%-5p:[%d{MM/dd HH:mm:ss,SSS}] %c(%t) %x:%m%n
# File Appender Definition
log4j.appender.logfile1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.logfile1.File=${LOG_FILE1}
log4j.appender.logfile1.DatePattern='.'yyyy-MM-dd
log4j.appender.logfile1.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile1.layout.ConversionPattern=%-5p:[%d{ISO8601}] %c(%t) %x:%m%n
# File Appender Definition
log4j.appender.logfile2=org.apache.log4j.DailyRollingFileAppender
log4j.appender.logfile2.File=${LOG_FILE2}
log4j.appender.logfile2.DatePattern='.'yyyy-MM-dd
log4j.appender.logfile2.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile2.layout.ConversionPattern=%-5p:[%d{ISO8601}] %c(%t) %x:%m%n
這里分別定義了兩個命名控件：
logfile1 對應命名空間（Java 代碼中的 package）org.stephencat.test.*
logfile2 對應命名空間 org.stephencat.cat.*
6. 建立一個用于初始化的 InitServlet ，配置如下方法：
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init(ServletConfig config) throws ServletException {
// Put your code here
String isRelativePosition = config.getInitParameter("relativePosition");
String logConfiguration = config.getInitParameter("logConfiguration");
String root = "";
if(isRelativePosition.equals("true")){
root = config.getServletContext().getRealPath("/");
}
PropertyConfigurator.configure(root + logConfiguration);
}
在 web.xml 配置這個 Servlet 的初始化參數（聲明 log4j.properties 的位置）和啟動優先級：
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>InitServlet</servlet-name>
<servlet-class>org.stephencat.test.InitServlet</servlet-class>
<init-param>
<param-name>relativePosition</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>logConfiguration</param-name>
<param-value>WEB-INF/log4j.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
7. 在 org.stephencat.test.TestServlet （映射為 /test）中加入：
static Logger log = Logger.getLogger(TestServlet.class.getName());
8. 在 org.stephencat.cat.Test2Servlet（映射為 /test2）中加入：
static Logger log = Logger.getLogger(Test2Servlet.class.getName());
9. 重新啟動 JBoss ，會出現如下錯誤消息：
11:53:21,549 ERROR [STDERR] log4j:ERROR A "org.jboss.logging.appender.FileAppend
er" object is not assignable to a "org.apache.log4j.Appender" variable.
11:53:21,549 ERROR [STDERR] log4j:ERROR The class "org.apache.log4j.Appender" wa
s loaded by
11:53:21,549 ERROR [STDERR] log4j:ERROR [WebappClassLoader
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
java.net.FactoryURLClassLoader@dcc4e2
] whereas object of type
11:53:21,549 ERROR [STDERR] log4j:ERROR "org.jboss.logging.appender.FileAppender
" was loaded by [org.jboss.system.server.NoAnnotationURLClassLoader@a97b0b].
11:53:21,549 ERROR [STDERR] log4j:ERROR Could not instantiate appender named "FI
LE".
這是因為自己的 log4j.jar 與 JBoss 的 log4jService 有點沖突，但這段錯誤消息實際上可以忽略
10. 訪問以下網址：
http://localhost/..../testhttp://localhost/..../test2將分別在以下日志文件中輸出日志內容：
D:/jboss-4.0.5.GA/server/default/log/configtest1.log
D:/jboss-4.0.5.GA/server/default/log/configtest2.log
文件名和物理路徑可在 log4j.properties 中修改。
posted on 2007-07-20 16:44
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