spring-boot-quartz-demo

Goal of this demo is to run quartz in a spring-boot application using HikariCP connection provider and JobStoreTX.

Problems encountered:

When specifically setting the jobStore in properties, it still switches to JobStoreCMT during runtime if datasource is set

//Java
schedulerFactory.setDataSource(dataSource);

//Properties
org.quartz.jobStore.class=org.quartz.impl.jdbcjobstore.JobStoreTX

When datasource is not set, it switches to C3P0 by default and the application will fail with

java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource

since I don't have it as a dependency. By default quartz runs using C3P0 connection provider which has some problems with it's dependencies, see https://stackoverflow.com/questions/49022204/system-cant-find-mchange-commons-java-0-2-11

In order to use JobStoreTX and HikariCP as a connection provider one needs to dive into the source code of quartz since there is little to no documentation on this matter. Regardless, the solutions turned out to be quite simple.

• Remove the schedulerFactory.setDataSource(dataSource); from java code

• Define a separate datasource for quartz

    spring.quartz.properties.org.quartz.jobStore.dataSource=myDS
    spring.quartz.properties.org.quartz.dataSource.quartzDS.driver=org.h2.Driver
    spring.quartz.properties.org.quartz.dataSource.quartzDS.URL=jdbc:h2:mem:test
    spring.quartz.properties.org.quartz.dataSource.quartzDS.user=sa
    spring.quartz.properties.org.quartz.dataSource.quartzDS.password=
    spring.quartz.properties.org.quartz.dataSource.quartzDS.maxConnections=1
  

• Define HikariCP as the datasource provider

    spring.quartz.properties.org.quartz.dataSource.quartzDS.provider=hikaricp
  

This will trigger a condition in org.quartz.impl.StdSchedulerFactory that initializes org.quartz.utils.HikariCpPoolingConnectionProvider as a connection provider

When the application is running you can access H2 console via

http://localhost:8080/h2-console