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This article mainly introduces SpringMVC asynchronous processing example analysis, the article is very detailed, has a certain reference value, interested friends must read!

asynchronous processing demo

To enable asynchronous return,@EnableAsync needs to be turned on. In the following code, DeferredResult is used for asynchronous processing.

When the request comes in, first create the DeferredResult object and set the timeout to 60 seconds. Then specify the callback for DeferredResult on asynchronous completion and wait timeout. Synchronous processing simply creates an asynchronous any and returns DeferredResult. In this way, Spring MVC will not immediately return a response to the client after processing the request, but will wait for DeferredResult processing to complete. If DeferredResult is not processed within 60 seconds, a timeout is triggered and a response is returned to the client.

@RequestMapping (value = "/async/demo")public DeferredResult async(){ //Create DeferredResult, set timeout 60s DeferredResult = new DeferredResult((long)60 * 1000); String uuid = UUID.randomUUID().toString(); Runnable callback = () -> manager.remove (deferredResult, uuid); //Set callback for completion and timeout deferredResult.onCompletion(callback); deferredResult.onTimeout(callback); //Create asynchronous task manager.addAsyncTask(deferredResult, uuid); //Synchronous return DeferredResult return deferredResult;}

For asynchronous tasks, you need to hold a DeferredResult object. At the end of asynchronous processing, you need to manually call DeferredResult.setResult to complete the output. When setResult is called, the data output is written to the client and an asynchronous completion event is triggered to execute the callback.

task.getDeferredResult().setResult(ConfigJsonUtils.toJsonString(map)); The above is "SpringMVC asynchronous processing sample analysis" All the contents of this article, thank you for reading! Hope to share the content to help everyone, more relevant knowledge, welcome to pay attention to the industry information channel!

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