Solved

Webflow Partial Rendering - Transition Evaluate not completed before rendering happens

Posted on 2008-10-07
2
1,786 Views
Last Modified: 2008-10-07
Hi,

I am having an issue with Spring Webflow.

I have a view that contains a standard h:datatable component. In the webflow xml, I define a transition that runs a method to refresh the list dependant on some filter values. The result is assigned to the viewScoped property in the original view. There is then a <render> tag with a fragment of the datatable.

The issue arises in when i hit the transition, i can see the method specified in the evaluate tag being called, and i can see it call the webservice that populates the list given to the datatable. However, the function is still mid way through its call (i halted it on the server hosting the service) - but the page still renders even though the function is still running to re-populate the list.

This gives the impression that the page filter and refresh is always once request cycle behind.

Code Snippets included. Any help is most appreciated.
From the flow.xml :

<view-state id="cashBatchListView" view="cashBatchList.xhtml" model="webapp">

	

<on-entry>

<evaluate expression="inwardCashService.retrieveBatchesForFilter(webapp, messageContext)" result="viewScope.batchHeaders" result-type="dataModel" />

</on-entry>

		

<transition on="applyFilter">			

<evaluate expression="inwardCashService.retrieveBatchesForFilter(webapp, messageContext)" result="viewScope.batchHeaders" result-type="dataModel" />	

<render fragments="cashBatchDataTableForm:batchListTable"/>

</transition>

</view-state>
 

From the facelet....

<h:dataTable id="batchListTable" styleClass="summary" 

value="#{batchHeaders}" var="bh" 

rendered="#{batchHeaders.rowCount > 0}">
 

From the backing bean ...

public List<BatchHeader> retrieveBatchesForFilter(InwardCashWebParamService webParam, MessageContext messageContext) {

						

ArrayList<BatchHeader> bhArray = new ArrayList<BatchHeader>();

		

try {

Getrecordstodisplayintype input2 = new Getrecordstodisplayintype();
 

// Set params omitted from snippet

			

System.out.println("Doing WebService ... ");

Record[] bhs = icp.getrecordstodisplay(input2);

System.out.println("returned from WebService ... ");

			

for (int x=0;x<bhs.length;x++)

{

BatchHeader bh = new BatchHeader();

// set up a item for list omitted from Snippet

 bhArray.add(bh);

 }				

} catch (Throwable error) {

System.out.println("Throwing Error:" + error.getMessage());	

throw new RuntimeException(error);

}

		

List<BatchHeader> bhList = bhArray;

return bhList;

}

Open in new window

0
Comment
Question by:ProgrammingSmurf
  • 2
2 Comments
 
LVL 1

Author Comment

by:ProgrammingSmurf
ID: 22659242
Additional:

I do not hit a throwable error, i can see the service complete normally ... but by this time, the web page is already rendered.
0
 
LVL 1

Accepted Solution

by:
ProgrammingSmurf earned 0 total points
ID: 22659941
Solved:

I had a link to apply the filter:
<sf:commandLink id="applySubset" value="Apply Subset" action="applyFilter" processIds="*" onchange="submit()"/>

I dont know why exactly it is firing, but the on change was submitting the form, and at the same time, the back end was calling the web service - i removed the onchange=-"submit()" and everything works fine.

Sorry for wasting your time.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
eclipse compiler vs Installed JREs option 3 73
JList custom Cell Renderer refresh 15 53
stackato and cloud 4 64
Way to decrease size of apk file 9 40
For customizing the look of your lightweight component and making it look opaque like it was made of plastic.  This tip assumes your component to be of rectangular shape and completely opaque.   (CODE)
INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

948 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now