Is it possible to write the System.out (OutputStream) directly to a log file like in the "old" log4j?
I only find solutions for log4j, not log4j2
thanks for any help!
It is quite easy using log4j2-iostreams
module. Let's say we want to send all messages from System.out
to a logger with name system.out
with log level INFO
:
System.setOut(
IoBuilder.forLogger(LogManager.getLogger("system.out"))
.setLevel(Level.INFO)
.buildPrintStream()
);
System.out.println("Lorem ipsum");
with the following log4j2.properties
appender.console.type = Console
appender.console.name = STDOUT
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = %d [%p] %c - %m%n
rootLogger.level = info
rootLogger.appenderRef.stdout.ref = STDOUT
we should see the following output in the console:
2017-10-28 12:38:22,623 [INFO] system.out - Lorem ipsum
The upcoming 2.1 release contains a new log4j-iostreams module which can do this and more. Should be out soon.
If you're in a hurry you can check out the latest source from master and build the 2.1 snapshot.
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