Many organizations need enterprise level clustered application to maintain high availability or perform non-stop jobs. Quartz Scheduler is an excellent option to assist on this.
Quartz Scheduler is a Java-based open source library which is freely available under Apache license 2.0. The latest version is 2.2.3. It requires two components for job scheduling, trigger and job.
Trigger can be cron-expression based time. Job can be the Java implementation of Quartz job interface. Quartz Scheduler manages triggers and jobs through database tables. With the download pack, Quartz offers database schema scripts for 22 databases, from Oracle, SQL Server, MySQL to PostgreSQL, etc.
Quartz Scheduler has a bold feature: supporting clustered instances in master-master mode...
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