![]() In practice, this bean could be whatever you wanted. Here, I’m injecting a simple bean to prove I got a message. I found better results using the ContextRefreshedEvent. I ran into some issues with getting the event listeners set up properly in the Spring Boot Context. But in testing it out, this was not the case. Reading about the Spring Boot Events, I thought the event I would like to use is ApplicationPreparedEvent. I often want to use a startup event to seed data for tests, so in this case, I need the database connection to be set up. If you’re using Spring Boot, you do have additional events to select from. This event has been around since the beginning of the Spring Framework. Traditionally under Spring Framework, we can use the ContextRefreshedEvent. Under the scenario we want to do something on startup we have two events we can consider using. This event is useful for error logging or alerting. This event is published when the Spring Boot Application fails to start. At this point, the Spring Beans are loaded, configured and ready for use. This event is published when the Spring Context is fully prepared but not refreshed. This event is published when the Spring Boot Application is starting up and is first available for inspection and modification. The Spring Context is running but may change later in the lifecycle. This event is published early in the startup of a Spring Application. Spring Boot introduces several new events on top of the events available in the core Spring Framework. This event is similar to the ContextStoppedEvent, but in this case, the Context cannot be re-started. It can be handy for doing cleanup work, like closing connections. In practice, you will not use this event very often. This event is published when the Spring Context is stopped. This event is published when the Spring Context is started. This event is published whenever the Spring Context is started or refreshed. The Spring Framework comes out of the box with a number of events, and you’re able to extend the event functionality for your own purposes. It does, however, have events that we can subscribe to and functionally accomplish the same thing. The Spring Framework itself does not have the concept for a bootstrap file like Grails does. ![]() It can be a very convenient way to seed an H2 database with startup values. ![]() I frequently use this to setup expected data, or to create test data for integration / functional tests. This will run at startup of the Spring container. One of the things I love about the Grails environment is that it comes with a handy oovy file. ![]()
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