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To enable the asynchronous processing, add the @EnableAsync annotation to the configuration class. The @EnableAsync annotation switches on Spring's ability to run @Async methods in a background thread pool.
Simply put, annotating a method of a bean with @Async will make it execute in a separate thread. In other words, the caller will not wait for the completion of the called method. One interesting aspect in Spring is that the event support in the framework also has support for async processing if necessary.
Never use @Async on top of a private method. In runtime, it will not able to create a proxy and, therefore, not work.
Here @EnableAsync is used for enabling asynchronous processing with Java Spring Boot Configuration and switches Spring's ability to run @Async methods. The @Async Methods run in the background thread pool without interruption other parallel processes.
Can the Spring @Async annotation be used on interface methods (so all implementations of that interface will implicitly have @Async on that method) or can it only be used on concrete classes?
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