Compose AsyncRequest and AsyncResponse

[alalag1]

Motivation

We are always using AsyncRequest and AsyncResponse in pairs, but AsyncRequest and AsyncResponse are always separated into two parameters.

Which means

• The parameters spec is always too long
• It is not clear that AsyncRequest and AsyncResponse is in the same lifecycle
  

  esa-restlight/restlight-core/src/main/java/esa/restlight/core/handler/HandlerInvoker.java

  Line 36 in ce8fe48

  Object invoke(AsyncRequest request, AsyncResponse response, Object[] args) throws Throwable;

Improvement

Using a composed interface(or class) to present a REQUEST.

public interface RequestContext {
    
    AsyncRequest request();
    
    AsyncResponse response();

    // other functions
}

Advantages

• The parameters spec would be short
• It is easy to know that AsyncRequest and AsyncResponse is in the same lifecycle
• It is easy to add more context for a REQUEST