I have a huge code base which serves info requests about colleges. There is a base framework code, and we have some separate packages for college1, college2, etc.,
Whenever there is a request for some info about college X, both framework code and college specific code both are triggered. I want to see logs generated for all requests for Company X to go to one location, and company Y to go to one location.
How do I use JUL or apache's logging.properties file to achieve this ? How do I ensure logs written by common framework libraries for company X go to one location, and logs written by common framework libraries for company Y go to some other location ?
I would have an xml file that contain the appenders to specify what packages go into what log file.
You can then load the xml file in your application entry point. Below is an example I have used in my current project
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- appenders -->
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out" />
<param name="threshold" value="error" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%t] %p %c - %m%n" />
</layout>
</appender>
<appender name="codebaseXAppender" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="codebaseX.log" />
<param name="MaxFileSize" value="10MB" />
<param name="MaxBackupIndex" value="10"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%t] %d %p %c - %m%n"/>
</layout>
</appender>
<appender name="codebaseYAppender" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="codebaseY.log" />
<param name="MaxFileSize" value="10MB" />
<param name="MaxBackupIndex" value="10"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%t] %d %p %c - %m%n"/>
</layout>
</appender>
<!-- Root Logger -->
<root>
<priority value="error" />
<appender-ref ref="console" />
</root>
<!-- Application logger -->
<logger name="com.codebasePackageX" additivity="true">
<level value="info" />
<appender-ref ref="codebaseXAppender" />
</logger>
<!-- Application logger -->
<logger name="com.codebasePackageY" additivity="true">
<level value="info" />
<appender-ref ref="codebaseYAppender" />
</logger>
</log4j:configuration>
Related
Okay, this is driving me nuts. I have an app that uses log4j 1.2.16, my configuration file is properly picked up and log4j writes to the file that I want, BUT it only logs error level.
Code:
import org.apache.log4j.Logger;
- (... code omitted)
private static final Logger LOGGER = Logger.getLogger(PostLoginController.class);
LOGGER.debug("TOTO debug");
LOGGER.info("TOTO Info");
LOGGER.warn("TOTO warn");
LOGGER.error("TOTO error");
XML:
<appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/jboss/jboss-eap-6.4/standalone/log/myLogFile.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p [%t:%c] : %m%n"/>
</layout>
</appender>
<!-- Root Logger -->
<root>
<priority value ="debug" />
<appender-ref ref="fileAppender"/>
</root>
When my app runs myLogFile is created and I can see the error log in it, but not the other ones:
2019-06-06 19:37:31 ERROR [http-/0.0.0.0:8080-2:my.classpath.PostLoginController] : TOTO error
Any idea what's wrong here?
You have to use like this for logging debug to error.
<log4j:configuration debug="false">
<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
<param name="target" value="System.out" />
<param name="threshold" value="debug" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p [%c{1}] - %m%n" />
</layout>
</appender>
<appender name="fileAppender" class="org.apache.log4j.FileAppender">
<param name="file" value="/jboss/jboss-eap-6.4/standalone/log/myLogFile.log"/>
<param name="append" value="false" />
<param name="threshold" value="debug" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p [%c{1}] - %m%n" />
</layout>
</appender>
<root>
<priority value="info" />
<appender-ref ref="default.console" />
<appender-ref ref="default.file" />
</root>
</log4j:configuration>
Okay, figured it out. I had to add
<category name="my.classpath">
<priority value="all" />
<appender-ref ref="fileAppender" />
</category>
because somehow the rootLogger level can't be altered.
I want to create two log file.
Because my project has two modules and log each module in separate log files.
After that ,I have to log each module logging data independently .i have Single Log4j file.when i use appender -ref inside the root then i can achive but at that time aop or java logging cant appear in that file only manualy logger msg shown there
Try Something like :
<log4j:configuration>
<appender name="fileAppender1" class="org.apache.log4j.RollingFileAppender">
<param name="Threshold" value="ALL" />
<param name="MaxFileSize" value="3KB" />
<param name="MaxBackupIndex" value="10" />
<param name="File" value="F:/logs/Testing/Project_moduleOne.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{MMM-dd-yyyy HH:mm:ss:SSS} %-5p %m%n" />
</layout>
</appender>
<appender name="fileAppender2" class="org.apache.log4j.RollingFileAppender">
<param name="Threshold" value="ALL" />
<param name="MaxFileSize" value="3KB" />
<param name="MaxBackupIndex" value="10" />
<param name="File" value="F:/logs/PAD_Testing/Project_moduleTwo.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{MMM-dd-yyyy HH:mm:ss:SSS} %-5p %m%n" />
</layout>
</appender>
<!--sets the priority log level for org.springframework -->
<logger name="com.sp.logger1" additivity="false">
<appender ref="fileAppender1"/>
</logger>
<logger name="com.sp.logger2" additivity="false">
<appender ref="fileAppender2" />
</logger>
<!--sets the default priority log level -->
<root>
<priority value="all"></priority>
<appender-ref ref="fileAppender1" />
<appender-ref ref="fileAppender2" />
</root>
</log4j:configuration>
I am using log4j 1.2 and I want to achieve the following behaviour:
I want to be able to log from all classes in the package. The log should be written in a detailed version (including info and debug messages) to a file, but I want to receive a short version (errors and fatals) as String.
From the documentation I guessed that I probably have to define two different logger instances which are ancestors or each other and assign appenders to them. But I neither know the details nor do I know if this is the intended way to achieve this behaviour.
Can somebody please give me a hint?
Define only one logger which you affect two file appenders: one with level error and the other with the debug level. The level filtering will be done in the appender.
<appender name="DebugAppender" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="logs/debug.log" />
<param name="MaxBackupIndex" value="5" />
<param name="MaxFileSize" value="5MB" />
<param name="threshold" value="debug" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %t %-5p %c - %m%n" />
</layout>
</appender>
<appender name="ErrorAppender" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="logs/error.log" />
<param name="MaxBackupIndex" value="5" />
<param name="MaxFileSize" value="5MB" />
<param name="threshold" value="error" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %t %-5p %c - %m%n" />
</layout>
</appender>
<logger name="mylogger">
<level value="debug" />
<appender-ref ref="DebugAppender" />
<appender-ref ref="ErrorAppender" />
</logger>
You should be able to use the same logger and just apply a filter to the handlers, i.e. set the log level for the console handler (which I assume you mean with "as String") to ERROR.
I have a service class that import and parse files from an ftp server.
This task can be executed from a Spring controller when the user choose a specific action.
The same service is used by a scheduled task (TimerTask) that everyday at a specific time do the same.
I would separate logging for user / scheduled execution into different files:
logs/scheduledImport.log
logs/userImport.log
Is it possible with Log4j?
Of course. First you must define 2 different file appenders.
<appender name="default.file" class="org.apache.log4j.FileAppender">
<param name="file" value="/log/userImport.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p [%c{1}] - %m%n" />
</layout>
</appender>
<appender name="another.file" class="org.apache.log4j.FileAppender">
<param name="file" value="/log/scheduledImport.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %-5p [%c{1}] - %m%n" />
</layout>
</appender>
Then you define your loggers:
<logger name="com.foo.UserService" additivity="false">
<level value="debug" />
<appender-ref ref="default.file" />
</logger>
<logger name="com.foo.ScheduledService" additivity="false">
<level value="debug" />
<appender-ref ref="another.file" />
</logger>
You can use different loggger instances. In this case you can apply different settings (output file) for each logger.
Is there a way to specify a pattern for an original filename?
I essentially want to do the following:
<param name="file" value="%d{yyyy/MM/dd HH:mm:ss}: %m%n_testlog.log"/>
How would I go about doing this?
I have a daily rolling log but I do it a little differently, using TimeBasedRollingPolicy from log4j extras:
<log4j:configuration debug="true">
<appender name="roll" class="org.apache.log4j.rolling.RollingFileAppender">
<param name="append" value="true" />
<param name="encoding" value="UTF-8" />
<!-- The active file to log to -->
<param name="file" value="/location/to/log/current.log />
<rollingPolicy class="org.apache.log4j.rolling.TimeBasedRollingPolicy">
<param name="FileNamePattern"
value="/location/to/log/archive/oldLog-%d{yyyy-MM-dd}.log" />
</rollingPolicy>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{DATE} %5p %c{2} - %m%n" />
</layout>
</appender>
<logger name="mypackage">
<level value="debug" />
<appender-ref ref="roll" />
</logger>
</log4j:configuration>
The above is in my code, which I based on this entry at the log4j Wiki.
Paul
I'm not sure this would help you:
<param name="File" value="Info"/>
<param name="DatePattern" value="yyyy-MM-dd-HH-mm-ss'_testlog.log'"/>