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https://issues.apache.org/jira/browse/WICKET-4661?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jan Riehn updated WICKET-4661:
------------------------------
Attachment: wicket-4661.patch
possible solution as patch
> Ajax channel busy flag not properly cleared upon SUCCESSFUL callback
> executions
> -------------------------------------------------------------------------------
>
> Key: WICKET-4661
> URL: https://issues.apache.org/jira/browse/WICKET-4661
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 6.0.0-beta3
> Reporter: Christian Oldiges
> Attachments: wicket-4661.patch
>
>
> The error is triggered if a custom AjaxChannel is defined using code like
> this in an AjaxEventbehavior:
> {noformat}
> @Override
> protected void updateAjaxAttributes(AjaxRequestAttributes
> attributes) {
> super.updateAjaxAttributes(attributes);
> attributes.setChannel(new AjaxChannel("mychannel",
> Type.DROP));
> }
> {noformat}
> Note: The channel type does NOT matter. Neither DROP nor QUEUE work.
> My guess is, the fact the a named ajax channel is used results in the client
> side re-using the JavaScript Wicket.Channel instances.
> In a re-used instance, the busy flag needs to be properly cleared after
> successfully executing an ajax call and its callback which is NOT done in the
> currently implemented code:
> {noformat}
> schedule: function (callback) {
> if (this.busy === false) {
> this.busy = true;
> try {
> return callback();
> } catch (exception) {
> this.busy = false;
> Wicket.Log.error("An error occurred
> while executing Ajax request:" + exception);
> }
> } else {
> Wicket.Log.info("Channel busy - postponing...");
> {noformat}
> A better, working solution would be:
> {noformat}
> schedule: function (callback) {
> if (this.busy === false) {
> this.busy = true;
> try {
> var callbackResult = callback();
> this.busy = false;
> return callbackResult;
> } catch (exception) {
> this.busy = false;
> Wicket.Log.error("An error occurred
> while executing Ajax request:" + exception);
> }
> } else {
> Wicket.Log.info("Channel busy - postponing...");
> {noformat}
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