JarCastingcronus
What's this?
cronus is a lightweight cron Java library. It accepts Vixie Cron syntax for specifying patterns. cronus uses JSR 311 and requires Java 8 or higher.
Building
cronus uses Apache Maven which it is beyond the scope to detail. The super simple quick start is:
mvn test
Use
<dependency>
<groupId>com.addthis</groupId>
<artifactId>cronus</artifactId>
<version>latest-and-greatest</version>
</dependency>
You can either install locally, or releases will eventually make their way to maven central.
Example
// Create a scheduler with one execution thread
CronScheduler scheduler = new CronScheduler.Builder(1).build();
// Create a pattern that runs every minute
Future<?> future = scheduler.schedule(CronPattern.build("* * * * *"),
() -> System.out.println("hello world"), false);
// Scheduled patterns do not execute until scheduler is started up
scheduler.start();
for(int i = 0; i < 70; i++) {
Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
System.out.print(i + " ");
}
// Future can be cancelled
future.cancel(false);
for(int i = 0; i < 50; i++) {
Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
System.out.print(i + " ");
}
scheduler.stop();
Versioning
It's x.y.z where:
- x: something major happened
- y: next release
- z: bug fix only
License
cronus is released under the Apache License Version 2.0. See Apache or the LICENSE for details.
