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add reference for clarity

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Jörg Prante 2020-06-08 11:27:28 +02:00
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[![Build Status](https://travis-ci.org/jprante/systemd-journal-appender.png?branch=master)](https://travis-ci.org/jprante/systemd-journal)
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## Reading systemd-journal from Java
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The implementation use bridj.
The work is based on https://github.com/bartlinga/systemd-journal which is unreleased.
## Log4j2 systemd-journal appender
This is a modified version of https://github.com/bwaldvogel/log4j-systemd-journal-appender
where all the warm applause and admiration should go to.
The documentation is reproduced here for reference.
This [Log4j][log4j] appender logs event meta data such as timestamp, logger name, exception stacktrace,
[ThreadContext (MDC)][thread-context] or the thread name to [fields][systemd-journal-fields]
in [systemd journal][systemd-journal].
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`journalctl CODE_FUNC=testMessageWithMDC THREAD_NAME=main` will only show messages that are logged from the Java main thread in a method called `testMessageWithMDC`.
## Bridj or JNA
## Bridj or JNA?
As you noted, I use both bridj and JNA. But only one is necessary. The only reason for this is that it works.
As you noted, I use both bridj and JNA. But only one is necessary.
bridj looks easier and more powerful, but is getting old. I am considering a fork of bridj and implement a log4j2 appender for bridj, or porting the API methods `sd_journal_open`, `sd_journal_add_match`, etc. to JNA.
The only reason for this is that it works.
Bridj looks easier and more powerful, but is getting old. I am considering a fork of bridj and implement a log4j2 appender based on bridj, or porting the API methods `sd_journal_open`, `sd_journal_add_match`, etc. to JNA.
Feel free to submit patches.

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Modified version of https://github.com/bwaldvogel/log4j-systemd-journal-appender

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A systemd-journal Java API, based on https://github.com/bartlinga/systemd-journal