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This article introduces the relevant knowledge of "what are the implementation steps of SpringBoot automatic configuration Quartz". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Dependent information

In the springboot2.x version, the initial dependency of spring-boot-starter-quartz emerged, which provides a lot of rich features.

1.1 original dependency information

When introducing the quartz framework before, the dependency information that must be introduced is:

Org.quartz-scheduler quartz 2.3.2 org.springframework spring-context-support org.springframework spring-tx

Dependency management information in the project's maven after the dependency is introduced

1.2 New dependencies

Replace the original three types of dependency information with new spring-boot-starter-quartz dependencies:

Org.springframework.boot spring-boot-starter-quartz

Dependency information of project maven management after dependency introduction

1.3 dependence on change

As you can see, using one starter dependency after springBoot2.0 is equivalent to introducing three dependency information, and spring-boot-starter-quartz is essentially the same as introducing three dependency information.

two。 New dependent use

2.1 default configuration is available

After using the new dependency information, it is completely feasible for the original configuration method, such as the original quartz usage process:

Define the task implementation Job, and override the execute () method in it to add the executed task

Configure the Quartz configuration class, and inject Job, Trigger, Scheduler objects into the configuration class

Start a timing task using the @ EnableScheduling annotation on the configuration class or startup class

The configured scheduled tasks are automatically performed when the project is started.

The implementation effect of the project is completely consistent with the new dependency support.

2.2 use automatic configuration

When it comes to the changes brought about by the starter dependency after springboot2.0, the most important thing is that the automatic configuration of quartz is encapsulated in the package.

The quartz-related autoconfiguration classes are supported in springboot's autoconfigure autoconfiguration class package, as follows

QuartzAutoConfiguration, the automatic configuration class, which automatically initializes the configuration scheduler class, data source information, and data storage types, etc.

QuartzProperties, configuration file class, for quartz configuration information, use unified application.yml/properties management, jar package provides a QuartzProperties class specifically used to obtain configuration information related to quartz in the configuration file.

This class is stored in the org.springframework.boot.autoconfigure.quartz springboot automatic configuration package to get the configuration that starts with "spring.quartz" in the configuration file.

QuartzDataSourceInitializer, initialize the data source operation, and directly use the data source configuration of the spingboot project

JobStoreType, an enumerated class that defines the quartz datastore type, with two values of MEMORY/JDBC

SchedulerFactoryBeanCustomizer, the functional interface, which can be implemented to customize the scheduler class configuration.

Use the automatic configuration class process

Use starter dependency information

Use application.yml/properties to uniformly manage quartz configuration

Remove the automatic configuration class marked with @ Configuration, otherwise the configuration class will replace the automatic configuration

2.3 configuration Information:

Configure data persistence in the application.yml file:

Server: port: 8082spring: datasource: url: jdbc:mysql://10.35.219.24:3306/test282?autoReconnect=true&useUnicode=true&characterEncoding=utf-8 username: mysql password: Dh3236@db! Driver-class-name: com.mysql.cj.jdbc.Driver quartz: # related attributes configure properties: org: quartz: scheduler: instanceName: clusteredScheduler instanceId: AUTO jobStore: class: org.quartz.impl.jdbcjobstore.JobStoreTX driverDelegateClass: org.quartz.impl.jdbcjobstore.StdJDBCDelegate tablePrefix: QRTZ_ isClustered : true clusterCheckinInterval: 10000 useProperties: false threadPool: class: org.quartz.simpl.SimpleThreadPool threadCount: 15 threadPriority: 5 threadsInheritContextClassLoaderOfInitializingThread: true # Database method job-store-type: jdbc

The field job-store-typ of database storage method can be set to jdbc or memory. If you need to set it to memory to store in memory, you need to change jobStore.class to memory type and remove other configuration information under jonStore. Otherwise, an error will be started.

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