How to log the second argument in log4j

19,075

Solution 1

Though I was expecting some better solution, but this seems to be the only one available.

LogManager.getLogger(SomeName.class.getName()).info("Message: {}, Detail: {}", message, detail);

Solution 2

LogManager.getLogger().info(
    "The {} is that {}, there are more {},"
 + " not necessarily in a message + details {}.",
    "reason", "often", "parameters", "relationship");
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Hassan
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Hassan

Like to learn new things, currently doing masters and writing code.

Updated on June 22, 2022

Comments

  • Hassan
    Hassan almost 2 years

    I am trying to use log4j for the first time and I have configured it correctly, I just wanted to know how can I print the details of the argument passed as second parameter:

    LogManager.getLogger(SomeName.class.getName()).info(message, detail);
    

    and my configuration appender is:

    <File name="file1" fileName="output.log">
        <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
    </File>
    

    I think there should be some switch within the pattern after %msg if I want to log the detail there. But I am not sure what or how.