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The following section describes how to configure and manage the Trace Service:
The trace service is based on Log4J. Each Network Gatekeeper service maintain its own log file, named <service name>.log and each service instance writes its log file to the local file system of the server on which it executes. The trace service writes log files in the directory $DOMAIN_HOME/servers/<server name>/trace.
For basic tracing, the root logger rootAT maintains the trace file defaultAT.log
and the root logger rootNT maintains the trace file defaultNT.log
.
Below is a list of attributes and operations for configuration and maintenance for basic tracing:
In addition to basic tracing, context tracing generates log messages filtered on the context of a request, for example a certain service provider or application. New context trace files can be added, and context filters and context categories can be applied to these files. Context categories can be added to the context trace file in order to log messages from one or more Network Gatekeeper services. For example, to log messages from the budget service and the SMPP plug-in to a context trace file, the context categories for these are added to the context trace file. Context trace filters narrow the generated log messages to requests that match a given context filter. A context filter has pre-defined filter types that defines what to filter on. For a given filter type, the value to match is defined. This is used for tracing on individual service providers, applications and so on.
The workflow for defining a context trace file is:
Below is a list of attributes and operations for configuration and maintenance for context tracing:
Managed object: Container ServicesTraceService
MBean: com.bea.wlcp.wlng.log.management.TraceServiceMBean
Below is a list of attributes and operations for configuration and maintenance:
Specifies whether trace should be enabled or not.
Adds a Log4J context category.
addContextCategory(Identifier: String, Category: String)
Adds one of the pre-defined filter types to the appender with the identified name.
The filter is a name-value pair, where the type identifies the filter type to use, and the value is the value of the filter.
All trace information that matches the filter is written to the context trace file.
When the trace service receives information about a request, it checks if the request matches the context filter. If it matches, the trace information is written to file. All filters must match for the trace to be written.
To add a filter that matches all requests from service provider ID SP1, the type shall be defined as SERVICE_PROVIDER and the value shall be set to SP1.
To add a filter that matches all requests from application ID APP1, the type shall be defined as APPLICATION and the value shall be set to APP1.
addContextFilter(identifier: String, type: String, value: String)
Allows adding named appender to named loggers. Each Network Gatekeeper service has a default FileAppender that outputs to a file with the same name as the Network Gatekeeper service.
attachAppender(LoggerName: String, AppenderName: String)
Creates a new context trace file.
createContextTrac
eFile(Identifier : String,Category: String, Threshold: String)
Creates a new root context trace file. Adds a context trace file under root trace directory and associates it with the root logger
createRootContextTraceFile(Identifier: String)
Flushes trace buffers to file. This method has effect only on FileAppenders or subclasses.
removeContextTraceFile(Identifier: String)
Resets all filters associated with a context trace file.
resetContextFilters(Identifier: String)
Rotates log files. This will invoke the rollOver() method on all registered RollingFileAppenders.
There is a set of Log4J Dynamic MBeans shipped with Network Gatekeeper that come by default with appenders. One Log4J hierarchies is defined and displayed in the following entries in the Network Gatekeeper management console under Log4J:
To the default hierarchy, the logger rootDefault is connected, also displayed in the list:
Additional loggers can be added, and additional appenders can be added to the loggers. It is possible to change both the priority of the logger and the appender to use. Parameters for the loggers and appenders can be configured.
A set of default appenders are defined:
Note: | The Log4J attributes are dynamic and not persisted. |
To persist Log4J settings, use the configuration file:
$DOMAIN_HOME/log4j/log4jconfig.xml
Trace configuration for Network Tier servers is performed via the Network Gatekeeper Administration Console, in <Server Name>Log4J. For Access Tier servers, there is no management attributes or operations exposed in the Network Gatekeeper Administration Console. This configuration must be done directly on the MBeans using a JMX-based management console such as JConsole or using WLST.
For example, if using WLST, connect to the MBean server as described in WebLogic Scripting Tool (WSLT) and change to the custom tree where Network Gatekeeper MBeans are located. Change to the Log4J directory: cd(
'log4J
')
The settings for the Access Tier servers can be changed in the following directories:
For example, to change the trace level for the Access Tier servers for the appender log4j:appender=defaultAT to WARN:
In addition to using the Log4J MBeans, trace can be configured using the file:
$DOMAIN_HOME/log4j/log4jconfig.xml
The file contains by default an empty skeleton.
The settings define in this file are updated every 30th second.
The ordering of the elements must be taken into account. Appenders must be declared before categories.
When using appenders that writes to file, the files are stored in $DOMAIN_HOME
.
Below is an example where the following named appenders are declared:
The all use the same class, org.apache.log4j.FileAppender
.
Each appender writes to a file which name is given in the <param name="File" value="<File name>"/>
element. The appenders also use the same layout class, org.apache.log4j.PatternLayou
t, and ConversionPattern.
The appenders are used by a set of categories, where the name attribute defines which class to trace. The categories also define which Log4J priority that shall be logged.
In the example, the following services are logged:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">
<appender name="MyRootLogger" class="org.apache.log4j.FileAppender">
<param name="File" value="A1.log"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%t %-5p %c{2} - %m%n"/>
</layout>
</appender>
<appender name="MyMultimediaMessagingWarningLogger" class="org.apache.log4j.FileAppender">
<param name="File" value="MMS_WARN.log"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%t %-5p %c{2} - %m%n"/>
</layout>
</appender>
<appender name="MyAccountContainerLogger" class="org.apache.log4j.FileAppender">
<param name="File" value="Account.log"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</layout>
</appender>
<category name="org.apache.log4j.xml">
<priority value="info"/>
</category>
<!-- log for a certain service... -->
<category name="com.bea.wlcp.wlng.account">
<priority value="DEBUG"/>
<appender-ref ref="MyAccountContainerLogger"/>
</category>
<!-- end log for a certain service... -->
<!-- log for a certain service... -->
<category name="com.bea.wlcp.wlng.plugin.multimediamessaging">
<priority value="WARN"/>
<appender-ref ref="MyMultimediaMessagingWarningLogger"/>
</category>
<!-- end log for a certain service... -->
<root>
<priority value="debug"/>
<appender-ref ref="MyRootLogger"/>
</root>
</log4j:configuration>
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