Omnicron

Simple, fast, zero-dependency Cron expression evaluator for Java 8.

Features:

• Check if a date matches against a Cron expression;
• Compute next and previous execution dates of some Cron expression.

Design choices:

• 0 0 * * * won't match DST gap
• 0 23 * * * will match DST overlap twice

In other words, a cron expression will only match exactly what its values explicitly say.

Usage

Omnicron is available through Maven Central repository, just add the following dependency to your pom.xml file:

<dependency>
    <groupId>net.intelie.omnicron</groupId>
    <artifactId>omnicron</artifactId>
    <version>0.1</version>
</dependency>

Then, you can use it like that:

Cron cron = new Cron("*/5 * * * *");
ZonedDateTime date = ZonedDateTime.now();

System.out.println("Next execution: " + cron.next(date));
System.out.println("Prev execution: " + cron.prev(date));