Job aggregator
##Description.
The system starts on schedule. The launch period is specified in the settings - app.properties. The first site will be career.habr.com. It has a section https://career.habr.com/vacancies/java_developer. He will work with him. The program should read all vacancies related to Java and write them to the database. Access to the interface will be through the REST API.
###Quartz. Quartz is a richly featured, open source job scheduling library that can be integrated within virtually any Java application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing tens, hundreds, or even tens-of-thousands of jobs; jobs whose tasks are defined as standard Java components that may execute virtually anything you may program them to do. The Quartz Scheduler includes many enterprise-class features, such as support for JTA transactions and clustering.
Quartz is freely usable, licensed under the Apache 2.0 license.