java - Log4j 和 Jboss。如何显示我的 log.Debug ("Debug") 消息？

Question

我正在尝试启动我的 jBoss 服务器 (v4.2) 以运行并显示我所有的 log.debug 消息。我需要通过编辑 jboss 配置来实现这一点。 不是通过应用程序以编程方式。

我的 jboss-log4.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<!-- ===================================================================== -->
<!--                                                                       -->
<!--  Log4j Configuration                                                  -->
<!--                                                                       -->
<!-- ===================================================================== -->

<!-- $Id: jboss-log4j.xml 62403 2007-04-18 15:26:43Z dimitris@jboss.org $ -->

<!--
   | For more configuration infromation and examples see the Jakarta Log4j
   | owebsite: http://jakarta.apache.org/log4j
 -->

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">

   <!-- ================================= -->
   <!-- Preserve messages in a local file -->
   <!-- ================================= -->

   <!-- A time/date based rolling appender -->
   <appender name="FILE" class="org.jboss.logging.appender.DailyRollingFileAppender">
      <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
      <param name="File" value="${jboss.server.log.dir}/server.log"/>
      <param name="Append" value="false"/>

      <!-- Rollover at midnight each day -->
      <param name="DatePattern" value="'.'yyyy-MM-dd"/>

      <!-- Rollover at the top of each hour
      <param name="DatePattern" value="'.'yyyy-MM-dd-HH"/>
      -->

      <layout class="org.apache.log4j.PatternLayout">
         <!-- The default pattern: Date Priority [Category] Message\n -->
         <param name="ConversionPattern" value="%d %-5p [%c] %m%n"/>

         <!-- The full pattern: Date MS Priority [Category] (Thread:NDC) Message\n
         <param name="ConversionPattern" value="%d %-5r %-5p [%c] (%t:%x) %m%n"/>
          -->
      </layout>
   </appender>

   <!-- A size based file rolling appender
   <appender name="FILE" class="org.jboss.logging.appender.RollingFileAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="File" value="${jboss.server.log.dir}/server.log"/>
     <param name="Append" value="false"/>
     <param name="MaxFileSize" value="500KB"/>
     <param name="MaxBackupIndex" value="1"/>

     <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="%d %-5p [%c] %m%n"/>
     </layout>      
   </appender>
   -->

   <!-- ============================== -->
   <!-- Append messages to the console -->
   <!-- ============================== -->

   <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
      <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
      <param name="Target" value="System.out"/>
      <param name="Threshold" value="DEBUG"/>

      <layout class="org.apache.log4j.PatternLayout">
         <!-- The default pattern: Date Priority [Category] Message\n -->
         <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}] %m%n"/>
      </layout>
   </appender>

   <!-- ====================== -->
   <!-- More Appender examples -->
   <!-- ====================== -->

   <!-- Buffer events and log them asynchronously
   <appender name="ASYNC" class="org.apache.log4j.AsyncAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <appender-ref ref="FILE"/>
     <appender-ref ref="CONSOLE"/>
     <appender-ref ref="SMTP"/>
   </appender>
   -->

   <!-- EMail events to an administrator
   <appender name="SMTP" class="org.apache.log4j.net.SMTPAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="Threshold" value="ERROR"/>
     <param name="To" value="admin@myhost.domain.com"/>
     <param name="From" value="nobody@myhost.domain.com"/>
     <param name="Subject" value="JBoss Sever Errors"/>
     <param name="SMTPHost" value="localhost"/>
     <param name="BufferSize" value="10"/>
     <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="[%d{ABSOLUTE},%c{1}] %m%n"/>
     </layout>
   </appender>
   -->

   <!-- Syslog events
   <appender name="SYSLOG" class="org.apache.log4j.net.SyslogAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="Facility" value="LOCAL7"/>
     <param name="FacilityPrinting" value="true"/>
     <param name="SyslogHost" value="localhost"/>
     <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="[%d{ABSOLUTE},%c{1}] %m%n"/>
     </layout>
   </appender>
   -->

   <!-- Log events to JMS (requires a topic to be created)
   <appender name="JMS" class="org.apache.log4j.net.JMSAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="Threshold" value="ERROR"/>
     <param name="TopicConnectionFactoryBindingName" value="java:/ConnectionFactory"/>
     <param name="TopicBindingName" value="topic/MyErrorsTopic"/>
   </appender>
   -->

   <!-- Log events through SNMP
   <appender name="TRAP_LOG" class="org.apache.log4j.ext.SNMPTrapAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="ImplementationClassName" value="org.apache.log4j.ext.JoeSNMPTrapSender"/>
     <param name="ManagementHost" value="127.0.0.1"/>
     <param name="ManagementHostTrapListenPort" value="162"/>
     <param name="EnterpriseOID" value="1.3.6.1.4.1.24.0"/>
     <param name="LocalIPAddress" value="127.0.0.1"/>
     <param name="LocalTrapSendPort" value="161"/>
     <param name="GenericTrapType" value="6"/>
     <param name="SpecificTrapType" value="12345678"/>
     <param name="CommunityString" value="public"/>
     <param name="ForwardStackTraceWithTrap" value="true"/>
     <param name="Threshold" value="DEBUG"/>
     <param name="ApplicationTrapOID" value="1.3.6.1.4.1.24.12.10.22.64"/>
     <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d,%p,[%t],[%c],%m%n"/>
     </layout>
   </appender>
   -->

   <!--  Emit events as JMX notifications
   <appender name="JMX" class="org.jboss.monitor.services.JMXNotificationAppender">
      <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>

      <param name="Threshold" value="WARN"/>
      <param name="ObjectName" value="jboss.system:service=Logging,type=JMXNotificationAppender"/>

      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d %-5p [%c] %m"/>
      </layout>
   </appender>
   -->

   <!-- ================ -->
   <!-- Limit categories -->
   <!-- ================ -->

   <!-- Limit the org.apache category to INFO as its DEBUG is verbose -->
   <category name="org.apache">
      <priority value="DEBUG"/>
   </category>

   <!-- Limit the org.jboss.serial (jboss-serialization) to INFO as its DEBUG is verbose -->
   <category name="org.jboss.serial">
      <priority value="DEBUG"/>
   </category>

   <!-- Limit the org.jgroups category to WARN as its INFO is verbose -->
   <category name="org.jgroups">
      <priority value="DEBUG"/>
   </category>

   <!-- Limit the jacorb category to WARN as its INFO is verbose -->
   <category name="jacorb">
      <priority value="DEBUG"/>
   </category>

   <!-- Limit JBoss categories -->
   <category name="org.jboss">
      <priority value="DEBUG"/>
   </category>


   <!-- Limit the JSR77 categories -->
   <category name="org.jboss.management">
      <priority value="DEBUG"/>
   </category>

   <!-- Enable JBossWS message tracing -->
   <category name="jbossws.SOAPMessage">
    <priority value="TRACE"/>
   </category>


   <!-- Decrease the priority threshold for the org.jboss.varia category
   <category name="org.jboss.varia">
     <priority value="DEBUG"/>
   </category>
   -->

   <!-- Show the evolution of the DataSource pool in the logs [inUse/Available/Max]
   <category name="org.jboss.resource.connectionmanager.JBossManagedConnectionPool">
     <priority value="TRACE"/>
   </category>
   -->

   <!--
      | An example of enabling the custom TRACE level priority that is used
      | by the JBoss internals to diagnose low level details. This example
      | turns on TRACE level msgs for the org.jboss.ejb.plugins package and its
      | subpackages. This will produce A LOT of logging output.
      |
      | Note: since jboss AS 4.2.x, the trace level is supported natively by
      | log4j, so although the custom org.jboss.logging.XLevel priority will
      | still work, there is no need to use it. The two examples that follow
      | will both enable trace logging.
   <category name="org.jboss.system">
     <priority value="TRACE" class="org.jboss.logging.XLevel"/>
   </category>
   <category name="org.jboss.ejb.plugins">
     <priority value="TRACE"/>
   </category>
   -->

   <!--
       | Logs these events to SNMP:
           - server starts/stops
           - cluster evolution (node death/startup)
           - When an EJB archive is deployed (and associated verified messages)
           - When an EAR archive is deployed

   <category name="org.jboss.system.server.Server">
     <priority value="INFO" />
     <appender-ref ref="TRAP_LOG"/>
   </category>

   <category name="org.jboss.ha.framework.interfaces.HAPartition.lifecycle">
     <priority value="INFO" />
     <appender-ref ref="TRAP_LOG"/>
   </category>

   <category name="org.jboss.deployment.MainDeployer">
     <priority value="ERROR" />
     <appender-ref ref="TRAP_LOG"/>
   </category>

   <category name="org.jboss.ejb.EJBDeployer">
     <priority value="INFO" />
     <appender-ref ref="TRAP_LOG"/>
   </category>

   <category name="org.jboss.deployment.EARDeployer">
     <priority value="INFO" />
     <appender-ref ref="TRAP_LOG"/>
   </category>

   -->

   <!-- ======================= -->
   <!-- Setup the Root category -->
   <!-- ======================= -->

   <root>
      <appender-ref ref="CONSOLE"/>
      <appender-ref ref="FILE"/>
   </root>

   <!-- Clustering logging -->
   <!-- Uncomment the following to redirect the org.jgroups and
      org.jboss.ha categories to a cluster.log file.

   <appender name="CLUSTER" class="org.jboss.logging.appender.RollingFileAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="File" value="${jboss.server.log.dir}/cluster.log"/>
     <param name="Append" value="false"/>
     <param name="MaxFileSize" value="500KB"/>
     <param name="MaxBackupIndex" value="1"/>

     <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="%d %-5p [%c] %m%n"/>
     </layout>
   </appender>
   <category name="org.jgroups">
     <priority value="DEBUG" />
     <appender-ref ref="CLUSTER"/>
   </category>
   <category name="org.jboss.ha">
     <priority value="DEBUG" />
     <appender-ref ref="CLUSTER"/>
   </category>
   -->

</log4j:configuration>

我正在测试的页面

private static final Logger log = Logger.getLogger(ServerLogsController.class
  .getName());

@GET
  @Path("/testDebug")
  public String testDebug(@Context final ServletContext context)
  {
    log.error("This is an error which always shows!");
    log.debug("This is a debug message");

    return "Test Debug Page";
  }

Answer 1

我可以想到两种方法来让调试消息显示在这里:

1) 您可以在 xml 文件中为 ServerLogsController 添加一个新条目以显示 DEBUG 消息。

<category name="package.for.ServerLogsController">
    <priority value="DEBUG" />
    <appender-ref ref="CONSOLE"/>
    <appender-ref ref="FILE"/>
</category>

将 package.for.ServerLogsController 替换为正确的包名称。请注意，您还可以将其设置为仅 package.for，该目录下的所有文件都将记录为 @DEBUG 级别。此设置将覆盖第二个项目符号中提到的根行为(即，如果根设置为 DEBUG 但 package.for.ServerLogsController 设置为 ERROR，您将看不到来自 package.for.ServerLogsController 的 DEBUG 消息。

2) 在根包上设置调试

<root>
    <priority value="DEBUG"/>
    <appender-ref ref="CONSOLE"/>
    <appender-ref ref="FILE"/>
</root>

这将使所有包在 DEBUG 级别登录，除非被包特别覆盖。