一简介
官网
http://www.quartz-scheduler.org/
What is the Quartz Job Scheduling Library?
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.
二 代码解析
开启分布式
org.quartz.jobStore.class=org.quartz.impl.jdbcjobstore.JobStoreTX
org.quartz.jobStore.isClustered=true
启动过程
QuartzScheduler.start
QuartzSchedulerResources.getJobStore
StdSchedulerFactory.instantiate (org.quartz.jobStore.class)
JobStoreSupport.setLockHandler (org.quartz.jobStore.lockHandler.class)
JobStoreSupport.initialize
setLockHandler (StdRowLockSemaphore)
JobStoreSupport.schedulerStarted
ClusterManager.initialize
run
manage
doCheckin
clusterCheckIn
Semaphore.obtainLock
StdRowLockSemaphore.executeSQL (select for update and insert)
clusterRecover
signalSchedulingChangeImmediately
SchedulerSignaler.signalSchedulingChange
QuartzSchedulerThread.signalSchedulingChange
QuartzSchedulerThread.run
JobStore.acquireNextTriggers
JobStore.triggersFired
各种建表语句地址：https://gitlab.com/quartz-scheduler/quartz/-/tree/master/quartz-core/src/main/resources/org/quartz/impl/jdbcjobstore