Configure log4j 2 using xml - java

I'd like to have log messages shown in three ways:
- on console
- on a single file log/logs/log.log file
- on a monthly changed file of the kind log/logs/log-201610.log
I wrote this configuration (using other questions here and several sources I can't find):
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<Console name="console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss,SSS} [%t] %-5level %logger{36} - %msg%n" />
</Console>
<File name="basic" fileName="log/log.log">
<PatternLayout
pattern="%d{dd/MM/yy HH:mm:ss,SSS} [%t] %-5level %logger{36} - %msg%n" />
</File>
<RollingFile name="RollingFile" fileName="log/logs/app.log"
filePattern="log/logs/log-%d{yyyyMM}.log">
<PatternLayout>
<Pattern>"%d{HH:mm:ss,SSS} [%t] %-5level %logger{36} - %m%n"</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
</Policies>
</RollingFile>
</Appenders>
<Loggers>
<Root level="ALL">
<AppenderRef ref="console" />
</Root>
<Logger name="sistema" level="ALL" additivity="true">
<AppenderRef ref="basic" />
</Logger>
<Logger name="sistemabis" level="ALL" additivity="true">
<AppenderRef ref="RollingFile" />
</Logger>
</Loggers>
</Configuration>
It seems to work properly (doesn't give errors), but I get an empty file in log/logs/app.log . In my file dependencies.xml I have this:
<dependency org="org.apache.logging.log4j" name="log4j-api" rev="2.5" transitive="false"/>
<dependency org="org.apache.logging.log4j" name="log4j-core" rev="2.5" transitive="false"/>
but I am afraid I'm still missing something.
Most likely, one day I'll remove the logging on the single full file (so I need to be able to distinguish among appenders). No size bound is needed.
Where am I wrong?
EDIT: according to what I read in comments, I edited to show the situa

According to comments, I modified dependencies and replaced some lines in the configuration file:
<Pattern>%d{dd/MM/yy HH:mm:ss,SSS} [%t] %-5level %logger{36} - %msg%n</Pattern>
<Logger name="sistema" level="ALL" additivity="true"> <!-- name è il nome del pacchetto radice da cui prendere. -->
<AppenderRef ref="basic" />
<AppenderRef ref="RollingFile" />
</Logger>
It seems to work properly. On 1 November, I'll know more about this.

Related

Log4j does not print to console nor write to file

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class AzulMain {
private static final Logger LOGGER = LogManager.getLogger(AzulMain.class.getName());
public static void main(String[] args){
LOGGER.info("Maybe my first Logger works?");
}
}
The imports work fine. I use these jar-files:
log4j-1.2-api-2.17.2.jar
log4j-api.2.17.2.jar
log4j-core-2.17.2.jar
And this is how my XML-file (log4j2.xml) looks. It is in the same folder as my AzulMain:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn">
<Properties>
<Property name="log-path">log/${date:yyyy-MM-dd HH-mm-ss-SSS}</Property>
<Property name="archive">${log-path}/archive</Property>
</Properties>
<Appenders>
<Console name="Console-Appender" target="SYSTEM_OUT">
<PatternLayout>
<pattern>
%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n
</pattern>
</PatternLayout>
</Console>
<File name="File-Appender-AzulMain" fileName="${log-path}/Azul.log">
<PatternLayout>
<pattern>
%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n
</pattern>
</PatternLayout>
</File>
<RollingFile name="RollingFile-Appender"
fileName="${log-path}/rollingfile.log"
filePattern="${archive}/rollingfile.log.%d{yyyy-MM-dd#HH-mm}.gz">
<PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
<Policies>
<TimeBasedTriggeringPolicy/>
<SizeBasedTriggeringPolicy size="30 MB"/>
</Policies>
<DefaultRolloverStrategy max="30"/>
</RollingFile>
</Appenders>
<Loggers>
<Logger name="AzulMain" level="trace" additivity="false">
<AppenderRef ref="File-Appender-AzulMain" level="all"/>
<AppenderRef ref="Console-Appender" level="info"/>
</Logger>
<Root level="debug" additivity="false">
<AppenderRef ref="Console-Appender"/>
</Root>
</Loggers>
</Configuration>
When I use JavaUtilLogger everything works quite fine so far, I can make it create a file and print to console, however, with log4j nothing works.
I tested deleting the XML file and adding BasicConfigurator.configure() into my main-method, but it still didn't work. If I start my main-method all I get is:
Process finished with exit code 0
What is strange to me is that when I use the command java -Dlog4j.debug -cp AzulMain, it does not show me my configuration as I would expect it, but just what seems to be a very generic help message.
It is my first time, I am using a logger. Does anyone know what the problem might be?
Update:
This helped me as a first step:
BasicConfigurator replacement in log4j2
I deleted the XML-file and used the new
Configurator.initialize(new DefaultConfiguration());
Configurator.setRootLevel(Level.INFO);
And now it works at least in so far as it prints to the console. However, I am still not able to make it use the log4j2.xml file. I tried naming it log4j2-test.xml, too. (Source) It did not make a difference.
Now it works. This is how I did it.
I set up a new project, with just a main-class and added a new xml-file with a file logger only at first, then added a logger to the console, too. I deleted cache in IntelliJ and deleted the Configurator-lines in the code.
This is the new XML-file log4j2.xml that made it work:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn">
<Properties>
<Property name="basePath">log/${date:yyyy-MM-dd HH-mm-ss-SSS}</Property>
</Properties>
<!-- File Logger -->
<Appenders>
<!-- Console appender configuration -->
<Console name="Console-Appender" target="SYSTEM_OUT">
<PatternLayout>
<pattern>
%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n
</pattern>>
</PatternLayout>
</Console>
<RollingFile name="fileLogger"
fileName="${basePath}/Azul.log"
filePattern="${basePath}/app-%d{yyyy-MM-dd}.log">
<PatternLayout>
<pattern>[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n
</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true" />
<SizeBasedTriggeringPolicy size="10MB" />
</Policies>
<!-- Max 10 files will be created everyday -->
<DefaultRolloverStrategy max="10">
<Delete basePath="${basePath}" maxDepth="10">
<!-- Delete all files older than 30 days -->
<IfLastModified age="30d" />
</Delete>
</DefaultRolloverStrategy>
</RollingFile>
</Appenders>
<Loggers>
<Root level="info" additivity="false">
<appender-ref ref="fileLogger" />
<appender-ref ref="Console-Appender" level="info"/>
</Root>
</Loggers>
</Configuration>
It seems to me to have been a mistake somewhere in the xml-file that I just couldn't figure out where it is.

log4j - write to file name as the logger name

I am trying to write my log into different files depending on the logger name...
is it even possible?
how I can use the logger name in the target file name?
this is the XML file I use:
<Configuration status="info">
<Properties>
<Property name="log-path" value="logs/"/>
<Property name="file-name" value="server"/>
<Property name="file-type" value=".log"/>
</Properties>
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
</Console>
<RollingFile name="File" fileName="${log-path}${file-name}${file-type}"
filePattern="${file-name}-%d{yyyy.MM.dd_HH.mm.ss}-%i.log">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
<SizeBasedTriggeringPolicy size="1 MB"/>
</RollingFile>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="File"/>
<AppenderRef ref="Console"/>
</Root>
</Loggers>
i have tried to use: <Property name="file-name" value="%logger"/> like in the use in PatternLayout and <Property name="file-name" value="%c{10}"/> witout secssus...
You can't do it like that with the RollingFileAppender. The appender receives log events as configured by your <Loggers> block, if log4j sends it log events with different LoggerNames they will be appended to whatever file is open. A RollingFileAppender writes to one file at a time and rolls when the configured policy tells it to.
You could write to different files by setting up multiple Loggers that target different appenders. Like this:
<Configuration status="info">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
</Console>
<RollingFile name="FileA"
filePattern="/tmp/A-%d{yyyy.MM.dd_HH.mm.ss}-%i.log">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
<SizeBasedTriggeringPolicy size="1 MB"/>
</RollingFile>
<RollingFile name="FileB"
filePattern="/tmp/B-%d{yyyy.MM.dd_HH.mm.ss}-%i.log">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
<SizeBasedTriggeringPolicy size="1 MB"/>
</RollingFile>
</Appenders>
<Loggers>
<Logger name="org.example.App" level="info" additivity="false">
<AppenderRef ref="FileA"/>
</Logger>
<Logger name="org.example.App2" level="info" additivity="false">
<AppenderRef ref="FileB"/>
</Logger>
<Root level="info">
<AppenderRef ref="Console"/>
</Root>
</Loggers>
</Configuration>
To route each event to a different RollingFileAppender based on some pattern you can use a RoutingAppender.
The RoutingAppender evaluates LogEvents and then routes them to a subordinate Appender. The target Appender may be an appender previously configured and may be referenced by its name or the Appender can be dynamically created as needed. The RoutingAppender should be configured after any Appenders it references to allow it to shut down properly.
You can also configure a RoutingAppender with scripts: you can run a script when the appender starts and when a route is chosen for an log event.
Here is how you could route based on LoggerName:
<Configuration status="info">
<Properties>
<Property name="log-path" value="logs/"/>
<Property name="file-name" value="server"/>
<Property name="file-type" value=".log"/>
</Properties>
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
</Console>
<Routing name="Routing">
<Routes pattern="$${event:Logger}">
<Route>
<RollingFile name="Rolling-${event:Logger}" fileName="${log-path}${file-name}-${event:Logger}${file-type}"
filePattern="${file-name}-%d{yyyy.MM.dd_HH.mm.ss}-%i-${event:Logger}.log">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
<SizeBasedTriggeringPolicy size="1 MB"/>
</RollingFile>
</Route>
</Routes>
</Routing>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="Routing"/>
<AppenderRef ref="Console"/>
</Root>
</Loggers>
</Configuration>
Also, out of interest, if you really want to you can implement your own Appender that does whatever you want with the LogEvent.
Here's a very rough start. It's an Appender that creates a RollingFileAppender per LoggerName. It only works if you use a SizeBasedTriggeringPolicy. You should be able to drop a class like that into your project and use XML like:
<Configuration status="info">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
</Console>
<FilePerLoggerNameAppender name="File"
filePattern="/tmp/log-%d{yyyy.MM.dd_HH.mm.ss}-%i-$LOGGER$.log">
<PatternLayout pattern="%d{dd.MM.yyyy HH:mm:ss.SSS} %-5level %logger - %msg%n"/>
<SizeBasedTriggeringPolicy size="1 MB"/>
</FilePerLoggerNameAppender>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="File"/>
<AppenderRef ref="Console"/>
</Root>
</Loggers>
</Configuration>
and see log files created with $LOGGER$ replaced with your logger names.

Log4j2: not write into file

I added Log4j2 into my project
implementation 'org.springframework.boot:spring-boot-starter-log4j2'
and added next properties:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO">
<Appenders>
<Console name="Console" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="%clr{%d{yyyy-MM-dd HH:mm:ss.SSS}}{faint} %clr{%5p} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n%xwEx"/>
<!-- Крутое, но бесцветное логирование-->
<!-- <PatternLayout pattern="%highlight{%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36}.%M():%L - %msg%n}{FATAL=red blink, ERROR=red, WARN=yellow bold, INFO=black, DEBUG=green bold, TRACE=blue}"/>-->
</Console>
<RollingFile name="File" fileName="C:/Users/Mi/output.log" filePattern="logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz" immediateFlush="true">
<PatternLayout>
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="10 MB" />
</Policies>
</RollingFile>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="Console"/>
</Root>
<Logger name="org.apache.logging.log4j.filelogger" level="info" additivity="false">
<AppenderRef ref="File"/>
</Logger>
</Loggers>
</Configuration>
App write logs to console, but not in file. As I wait, app shall write logs into file by url C:/Users/Mi/output.log, it creates automatically, I can't delete it while app is wotking, but there no logs. Please advice, what to do.
You are only logging stuff from org.apache.logging.log4j.filelogger package into the "File" appender. The Logger name property is the package/class reference
You should do something like this to get logging to file instead of console:
<Root level="info">
<AppenderRef ref="File"/>
</Root>
If you want console and file do:
<Root level="info">
<AppenderRef ref="File"/>
<AppenderRef ref="Console"/>
</Root>

Apache Log4j2 package specific logging using log4j2.xml

I am using log4j2. But the problem that I am facing is that it logs all logs. I want to ... log from specific package to a specific file & other package to another file. I am using log4j2.xml for configuration.
Please can someone help?
log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Loggers>
<Root level="DEBUG" additivity="false">
<AppenderRef level="DEBUG" ref="CONSOLE" />
<AppenderRef level="DEBUG" ref="fileAppender" />
</Root>
<Logger name="com.pkg.test.logging.method" level="DEBUG"
additivity="false">
<Appender-ref ref="fileAppender" level="DEBUG" />
</Logger>
</Loggers>
<Appenders>
<Console name="CONSOLE" target="SYSTEM_OUT">
<PatternLayout
pattern="%highlight{[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1}: %L - %msg%n%throwable}" />
</Console>
<RollingFile name="fileAppender" fileName="./log.log"
filePattern="./log-%d{yyyy-MM-dd}.log">
<PatternLayout
pattern="%highlight{[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1}: %L - %msg%n}" />
<Policies>
<TimeBasedTriggeringPolicy interval="1"
modulate="true" />
</Policies>
</RollingFile>
</Appenders>
Just answered the question.
log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Loggers>
<Root level="DEBUG" additivity="false">
<AppenderRef level="DEBUG" ref="CONSOLE" />
</Root>
<Logger name="com.pkg.test.logging.method" level="DEBUG"
additivity="false">
<Appender-ref ref="fileAppender" level="DEBUG" />
</Logger>
</Loggers>
<Appenders>
<Console name="CONSOLE" target="SYSTEM_OUT">
<PatternLayout
pattern="%highlight{[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1}: %L - %msg%n%throwable}" />
</Console>
<RollingFile name="fileAppender" fileName="./log.log"
filePattern="./log-%d{yyyy-MM-dd}.log">
<PatternLayout
pattern="%highlight{[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1}: %L - %msg%n}" />
<Policies>
<TimeBasedTriggeringPolicy interval="1"
modulate="true" />
</Policies>
</RollingFile>
</Appenders>
Removed the <AppenderRef level="DEBUG" ref="fileAppender" /> from root logger. Thus it started logging logs based on packages.
From Log4J Manual:
Adding a specific logger for a class: (you can refer to packages here too)
<Logger name="org.apache.logging.log4j.test2" level="debug" additivity="false">
<AppenderRef ref="File"/>
</Logger>
Adding a specific appender:
<Appender type="File" name="File" fileName="${filename}">
<Layout type="PatternLayout">
<Pattern>%d %p %C{1.} [%t] %m%n</Pattern>
</Layout>
</Appender>
The <Loggers> section of the config looks correct. But, if all other logs not belonging to the expected package is also getting logged, it is the Root logger which is responsible for these logs, and not the package level logger. It may not be active because of the way you are creating the logger instance in your code. E.g: If one is using slf4j to create the logger instance, then this is how we would need to create the logger instance:
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
Logger logger = LoggerFactory.getLogger(Test.class);
If one gets the logger instance using - Logger logger = LoggerFactory.getLogger("Test") then, the config will not work as expected.
Also, another answer mentioned that the solution was to remove the fileAppender that the package logger was using from the root logger. This, in fact, is not a problem. You are free to use the same appenders in root and package level logger. My answer in context of log4j-api 2.14.1

Log4j 2 logging in the wrong appender

I'm working with log4j 2, version 2.4 on Jboss 6.4, my log4j2.xml is in WEB-INF/classes placed. I can deploy my war without errors about my log4j config, and I can log properly in my RollingFile name="myLog", but something I can't understand is why appear the info's logs for "myLog" in my console appender
private static final Logger loggerBatch = LogManager.getLogger("my.test");
loggerBatch.info("test log");
Config:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</Console>
<RollingFile name="myLog" fileName="C:\\Workarea\\my.log"
filePattern="C:\\Workarea\\myLog-%d{dd-MM-yyyy}-%i.log"
append="true">
<PatternLayout>
<Pattern>%d %p %c [%t] %m%n</Pattern>
</PatternLayout>
<Policies>
<SizeBasedTriggeringPolicy size="5MB"/>
</Policies>
<DefaultRolloverStrategy max="5"/>
</RollingFile>
</Appenders>
<Loggers>
<Logger name="my.test">
<AppenderRef ref="myLog" level ="info"/>
</Logger>
<Root level="debug">
<AppenderRef ref="Console" />
</Root>
<Root level="error">
<AppenderRef ref="Console" />
</Root>
<Root level="info">
<AppenderRef ref="Console" />
</Root>
</Loggers>
</Configuration>
In addition to Andrey's answer you have declared 3 root loggers. There can only be one. Which one of the definitions will win is undefined.
Check your additivity settings. This will fix the issue
<Logger name="my.test" additivity="false">

Categories