Colin Zhang created LOG4J2-2970:
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Summary: Adding String return type of each log method
Key: LOG4J2-2970
URL: https://issues.apache.org/jira/browse/LOG4J2-2970
Project: Log4j 2
Issue Type: New Feature
Components: API
Affects Versions: 2.13.3
Reporter: Colin Zhang
In many industry system, we need to log the error in the log and then throw a
new exception with the same message. The logger will populate the message with
markers and variables.
But we need to manually populated it again by string + again when construct the
exception message. This is an anti-pattern.
Please take below snippet as example:
{quote}
{code:java}
// code placeholder
{code}
log.error("The number of records is {} which exceed the threshold {}", num,
threshold);
throw new ValidationException("The number of record is " + num + " which exceed
the threshold " + threshold);
{quote}
This is really bad since all the logging API are void.
If the API can return populated message, the code would turn into this:
{quote}
{code:java}
// code placeholder
{code}
String error = log.error("The number of records is {} which exceed the
threshold {}", num, threshold);
throw new ValidationException(error);
{quote}
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