CODEWITHSUNDEEP
javalogginglog4j2
Hassan
Hassan

Reputation: 930

How to log the second argument in log4j

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.

Upvotes: 8

Views: 30163

Answers (2)

Remko Popma
Remko Popma

Reputation: 36754

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

Upvotes: 5

Hassan
Hassan

Reputation: 930

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);

Upvotes: 17

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