svn commit: r1308751 - in /ofbiz/trunk/framework: images/webapp/images/selectall.js webapp/src/org/ofbiz/webapp/control/RequestHandler.java

Author: jleroux
Date: Tue Apr  3 08:41:06 2012
New Revision: 1308751

URL: http://svn.apache.org/viewvc?rev=1308751&view=rev
Log:
A patch from Deepak Dixit for "Auto-completer request should be async." https://issues.apache.org/jira/browse/OFBIZ-4780

Currently auto-completer uses sync call to prepare auto-completer source (result list).
Due to this user can't perform any other operation on lookup field and user should have to wait until response came.
In general, synchronous requests should never be used because they tend to block the execution of anything else on the page (or even the entire browser UI), which isn't good.
Also ajax-loader image not display on google chrome browser due to sync request.

Need to use async request for auto-completer.

Modified:
    ofbiz/trunk/framework/images/webapp/images/selectall.js
    ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/control/RequestHandler.java

Modified: ofbiz/trunk/framework/images/webapp/images/selectall.js
URL: http://svn.apache.org/viewvc/ofbiz/trunk/framework/images/webapp/images/selectall.js?rev=1308751&r1=1308750&r2=1308751&view=diff
==============================================================================
--- ofbiz/trunk/framework/images/webapp/images/selectall.js (original)
+++ ofbiz/trunk/framework/images/webapp/images/selectall.js Tue Apr  3 08:41:06 2012
@@ -17,6 +17,9 @@
  * under the License.
  */
 
+//Define global variable to store last auto-completer request object (jqXHR).
+var LAST_AUTOCOMP_REF = null;
+
 // Check Box Select/Toggle Functions for Select/Toggle All
 
 function toggle(e) {
@@ -412,8 +415,15 @@ function ajaxAutoCompleter(areaCsvString
                 jQuery.ajax({
                     url: url,
                     type: "post",
-                    async: false,
                     data: {term : request.term},
+                    beforeSend: function (jqXHR, settings) {
+                        //If LAST_AUTOCOMP_REF is not null means an existing ajax auto-completer request is in progress, so need to abort them to prevent inconsistent behavior of autocompleter
+                        if (LAST_AUTOCOMP_REF != null) {
+                            var oldRef = LAST_AUTOCOMP_REF;
+                            oldRef.abort();
+                        }
+                        LAST_AUTOCOMP_REF= jqXHR;
+                    },
                     success: function(data) {
                      // reset the autocomp field
                      autocomp = undefined;

Modified: ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/control/RequestHandler.java
URL: http://svn.apache.org/viewvc/ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/control/RequestHandler.java?rev=1308751&r1=1308750&r2=1308751&view=diff
==============================================================================
--- ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/control/RequestHandler.java (original)
+++ ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/control/RequestHandler.java Tue Apr  3 08:41:06 2012
@@ -872,7 +872,14 @@ public class RequestHandler {
         try {
             resp.flushBuffer();
         } catch (java.io.IOException e) {
-            throw new RequestHandlerException("Error flushing response buffer", e);
+            /*If request is an ajax request and user calls abort() method for on ajax request then skip throwing of RequestHandlerException .
+             Specially its done for async ajax auto completer call, if we call abort() method on ajax request then its showing broken pipe exception on console,
+             because request is aborted by client (browser).*/
+            if (!"XMLHttpRequest".equals(req.getHeader("X-Requested-With"))) {
+                throw new RequestHandlerException("Error flushing response buffer", e);
+            } else {
+                if (Debug.verboseOn()) Debug.logVerbose("Skip Request Handler Exception for ajax request.", module);
+            }
         }
 
         String vname = (String) req.getAttribute("_CURRENT_VIEW_");