cronus

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.