Differences

This shows you the differences between two versions of the page.

--- otm:ordering_of_messages:fifo [2011/06/27 08:21]
aspectscript
+++ otm:ordering_of_messages:fifo [2012/02/06 21:16] (current)
aspectscript
@@ Line 1: / Line 1: @@
+====== The FIFO strategy ======
 A mashup application is created from the combination of information retrieved from different servers, //e.g.// Housing Maps. Programmers have to overcome the issue of creating an incorrect Web page due to an arbitrary (and unexpected) order of server responses. For instance, consider a Web page that is created with two Ajax requests. If the second server response is processed before the first server response, the Web page is created incorrectly. A **FIFO** strategy, which processes the server responses in the same order as the Ajax requests are sent, ensures that the Web page is always created correctly.
@@ Line 11: / Line 13: @@
 </html>
-The Fifo strategy is implemented as a TM advice, which is a JavaScript function, that is executed every time a response is retrieved:
+The FIFO strategy is implemented as a piece of advice, which is a JavaScript function, that is executed every time a server response is received:
 <code javascript>
 var FIFO = function(jp){
-  var request = jp . target ;
+  var request = jp.target;
   if (this.idServerRespExpected != request.idServerResp){
-    this.jpsQueue.push(jp) ;
+    this.jpsQueue.push(jp);
   }
   else{
-    jp.proceed ( ) ;
+    jp.proceed();
     this.idServerRespExpected = request.idServerResp + 1;
    // executing jp proceeds that can be executed now
-   this.idServerRespExpected =this.jpsQueue.execRecEarlyJPs( this . idServerRespExpected ) ;
+   this.idServerRespExpected =this.jpsQueue.execRecEarlyJPs(this.idServerRespExpected);
   }
 }
 </code>
-Go back the [[otm/ordering_of_messages|the parent page]] web page.
+Go back the [[otm/ordering_of_messages|the parent Web page]].