CODEWITHSUNDEEP
javalogginglog4j2xinclude
user3093295
user3093295

Reputation: 153

How to use multiple configuration files for Log4j2?

I am writing Java code that tests a Java library. The library includes its own Log4j2 configuration as part of the distribution.

I would like to use Log4j2 in my test code without modifying the library's configuration.

Is there a way to have a separate Log4j2 configuration for my test code?

This is all running as command-line Java, no servers or web involvement at all.

EDIT

What I want is to be able to configure loggers, appenders, etc for the test code to use, and at the same time have the library code use its own separate configuration file for its logging.

The idea is to use Log4j2 in my test code, but without having to change the library's configuration file. Since the library configuration file is part of the library's distribution, I don't want to change it for testing.

Upvotes: 13

Views: 24192

Answers (7)

zendu
zendu

Reputation: 1235

Log4j2 supports "Composite Configuration" which exactly matches your requirement. All you need to do is provide path to multiple files in log4j.configurationFile property. This can be passed from command line or added to log4j2.component.properties file in your application.

References

Upvotes: 9

user14305911
user14305911

Reputation: 1

first configure application.yaml file
spring:
  profiles:
    active: dev

---
spring:
  message: running in the dev profile    //just to output the message in the log
  profiles: dev
logging.config: classpath:log4j2-dev.xml

---
spring:
  profiles: prod
logging.config: classpath:log4j2-prod.xml



and create these similar files in your classpath
* log4j2-dev.xml
* log4j2-prod.xml

Upvotes: 0

Jose G. Mejía
Jose G. Mejía

Reputation: 41

To use multiple configuration files, depending on the environment you must set the.

for example:

if (env.equals("DEV")) {
 setConfigFile("log4j2-dev.xml");
}

public static void setConfigFile(String logConfigFile) {
        File file = new File(logConfigFile);
        LoggerContext context = (org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false);
        context.setConfigLocation(file.toURI());
    }

Upvotes: 0

Vadim Leyzerovich
Vadim Leyzerovich

Reputation: 1

Referencing https://logging.apache.org/log4j/2.x/manual/configuration.html states that you can add multiple comma separated files under log4j2.configurationFile property.

Upvotes: 0

habeeb
habeeb

Reputation: 1

Correct format for using an alternate XML file to log4j2.xml:

java -Dlog4j.configurationFile=./location/log4j2-custom.xml

Assuming ./location/log4j2-custom.xml exists and is the new XML to replace log4j2.xml in this run

See: https://github.com/kamalcph/Log4j2Examples/blob/master/src/main/java/in/co/nmsworks/log4j2/examples/CompositeConfigurationExample.java

Upvotes: 0

loknath
loknath

Reputation: 1372

There are two step you can try to solve for your issue

  • Create your own configuration file with your custom name(eg: xyz.properties/.xml)
  • You must add the following line to your java runtime command

cmd> java -Dlog4j.configuration=location/xyz.properties

If you use diffent name for configuration rather log4j.properties/.xml file you need to configure that file at runtime by above command for more info have a look here..

Upvotes: 3

Remko Popma
Remko Popma

Reputation: 36844

This may be helpful:

  • Log4j2 will first look for log4j2-test.xml in the classpath
  • if that file is not found, it will look for log4j2.xml in the classpath

So one option is to copy the library's configuration (log4j2.xml) to log4j2-test.xml and add your own configuration to log4j2-test.xml.

Furthermore, Log4j2 supports XInclude in XML configuration, so you could use that feature to avoid duplicating the library's configuration in your log4j2-test.xml.

Upvotes: 10

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