Spring Cloud Task provides the ability to emit events through a Spring Cloud Stream channel when the task is run through a Spring Cloud Stream channel. A task listener is used to publish the TaskExecution on a message channel named task-events. This feature is autowired into any task that has spring-cloud-stream, spring-cloud-stream-<binder>, and a defined task on its classpath.

	Note
	To disable the event emitting listener, set the spring.cloud.task.events.enabled property to false.

With the appropriate classpath defined, the following task emits the TaskExecution as an event on the task-events channel (at both the start and the end of the task):

@SpringBootApplication
public class TaskEventsApplication {

	public static void main(String[] args) {
		SpringApplication.run(TaskEventsApplication.class, args);
	}

	@Configuration
	public static class TaskConfiguration {

		@Bean
		public CommandLineRunner commandLineRunner() {
			return new CommandLineRunner() {
				@Override
				public void run(String... args) throws Exception {
					System.out.println("The CommandLineRunner was executed");
				}
			};
		}
	}
}

	Note
	A binder implementation is also required to be on the classpath.

	Note
	A sample task event application can be found in the samples module of the Spring Cloud Task Project, here.