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When my spring web app shuts down, is there an event I can wireup to somehow that I can perform some cleanup code to empty out some pools etc.
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In the Spring Boot Document, they said that 'Each SpringApplication will register a shutdown hook with the JVM to ensure that the ApplicationContext is closed gracefully on exit. ' When I click ctrl+c on the shell command, the application can be shutdown gracefully.
registerShutdownHook() method in Spring In Java programming language you can create shutdown hooks, where you create a new thread and provide logic that is executed when the JVM is shutting down. Then you can register your thread class instance as a shutdown hook to the VM using Runtime.
Spring Boot Actuator comes with many production-ready features which include /shutdown endpoint. By default, all /shutdown endpoint is not enabled in the Actuator. To use this endpoint in our application, we should include spring-boot-starter-actuator starter and enable this endpoint in our application.
You Could use the following
destroy-method as @amir75 recommends
@PreDestroy annotation
Implement DisposableBean and override destroy method.
All the deatails about these can be found at Disposable Callbacks.
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