jjournal
Java API for reading systemd-journald logfiles
Overview
libjournal-java-reader is a library for accessing systemd-journals from Java.
It is implemented as a JNR wrapper for the standard C systemd-library interface.
Dependencies
- JNR FFI
- JDK 8
Getting Started
Maven
For use with Java 8+
The maven artifact vector is
<dependency>
<groupId>org.metabit.platform.interfacing</groupId>
<artifactId>jjournal</artifactId>
<version>0.3.0</version>
</depencency>
Prerequisites
The runtime system has to have libsystemd installed and accessible via Java library path.
Examples
import org.metabit.platform.interfacing.jjournal.Journal;
...
// print messages for most recent minute from the journal of the current user
Instant now = Instant.now();
Instant oneMinuteAgo = now.minusSeconds(60);
try (Journal journal = new Journal(EnumSet.of(OpenFlags.CURRENT_USER)))
{
journal.foreachInTimerange(oneMinuteAgo,now,jj ->
{
final String msg = jj.readMessageField();
System.err.println(msg);
});
}
Deployment
Make sure libsystemd is installed and accessible via Java library path on the runtime system the code is executed on.
(e.g. apt-get install libsystemd0)
