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Send watchdog notifications to systemd

Lib for java daemons to send keep-alive messages to refresh the systemd watchdog timestamp using the native interface. Or you can use this project to do it using the /usr/bin/systemd-notify utility.

Use the version 1.1 build artifact.

	<groupId>org.tricorder</groupId>
	<artifactId>java-sysd-notify-watchdog</artifactId>
	<version>1.1</version>

Simple Usage

	SysDNotifier() notifier = new SysDNotifier();
 	notifier.start();

Advanced Usage

	SysDNotifier notifier = new SysDNotifier();
	notifier.setAuditor(new Auditor() {
		@Override
		public boolean allGood() {				
			//Do more extensive internal checking of the process, if ok, return true.
			//Returning false will have the effect of suppressing the keep-alive 
			//message, causing systemd to kill and restart the process. 
			return true;
		}
	});
	notifier.start();

.service file layout

[Unit]
Description=My Service

[Service]
#PIDFile=/tmp/my-service.pid
Environment=LD_PRELOAD=/usr/lib64/libsystemd-daemon.so
ExecStart=/usr/lib/jvm/java-1.8.0/bin/java -jar /usr/local/bin/my-service.jar
WatchdogSec=500
Restart=on-failure

[Install]
WantedBy=multi-user.target