Java EE documentation 327 page Two snippet code summary

The first code is not an asynchronous process, the service program receives a parameter from the request, and then takes the information based on the parameter from the database or the Web page, then these resources are slow, causing the blocking operation, the service program uses the results obtained from the resource to cause the response.

The second code is an asynchronous process, and Request.startasync () causes the request to be in an asynchronous process through Acontext.start (new Runnable () {...}) Enter a new line, use the inner class run () to execute the new line, the inner class has the read request parameters and the entry of the asynchronous environment to write the response, and then use complete () to send the response to the client.

Java EE documentation 327 page Two snippet code summary