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Simplified render phase logic.

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This commit is contained in:
Erwin Vervaet
2007-04-03 14:54:43 +00:00
parent 4b433ce0b4
commit 277f3925a1
1 changed files with 22 additions and 23 deletions
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45
spring-webflow/src/main/java/org/springframework/webflow/executor/mvc/PortletFlowController.java
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@@ -157,35 +157,29 @@ public class PortletFlowController extends AbstractController implements Initial
protected ModelAndView handleRenderRequestInternal(RenderRequest request, RenderResponse response) throws Exception {
PortletExternalContext context = new PortletExternalContext(getPortletContext(), request, response);
if (argumentHandler.isFlowExecutionKeyPresent(context)) {
// this is a request to render an active flow execution -- extract its key
String flowExecutionKey = argumentHandler.extractFlowExecutionKey(context);
// look for a cached response instruction in the session put there
// by the action request phase as part of an "active view" forward
ResponseInstruction responseInstruction = extractActionResponseInstruction(request);
if (responseInstruction == null) {
// no response instruction found, simply refresh the current
// view state of the flow execution (happens when the "refresh" browser button is clicked)
// look for a cached response instruction in the session put there
// by the action request phase
// the response instruction could be an "active application view" rendered
// from a view-state or a "confirmation view" rendered by an end-state
ResponseInstruction responseInstruction = extractActionResponseInstruction(request);
if (responseInstruction != null) {
// found: convert the cached response instruction to model and view for rendering
return toModelAndView(responseInstruction);
}
else {
if (argumentHandler.isFlowExecutionKeyPresent(context)) {
// this is a request to render an active flow execution -- extract its key
String flowExecutionKey = argumentHandler.extractFlowExecutionKey(context);
// simply refresh the current view state of the flow execution (happens
// when the "refresh" browser button is clicked)
return toModelAndView(flowExecutor.refresh(flowExecutionKey, context));
}
else {
// found: convert the cached response instruction to model and view for rendering
return toModelAndView(responseInstruction);
}
}
else {
// this is either a "launch" flow request or a "confirmation view" render request
// first look for the cached "confirmation view" response instruction
ResponseInstruction responseInstruction = extractActionResponseInstruction(request);
if (responseInstruction == null) {
// no response instruction found in session - launch a new flow execution
// launch a new flow execution
String flowId = argumentHandler.extractFlowId(context);
return toModelAndView(flowExecutor.launch(flowId, context));
}
else {
// found: convert the cached confirmation response instruction to model and view for rendering
return toModelAndView(responseInstruction);
}
}
}
@@ -252,6 +246,11 @@ public class PortletFlowController extends AbstractController implements Initial
* Expose given response instruction to the render phase by putting it in the session.
*/
private void exposeToRenderPhase(ResponseInstruction responseInstruction, ActionRequest request) {
// there are 2 reasons why we need to put the ResponseInstruction in the session
// and we can't just rely on flow execution 'refresh' during the portlet render phase:
// 1 - a ResponseInstruction rendered from an end-state cannot be refreshed
// ("confirmation view")
// 2 - to make the initial contents of request scope available to the view
PortletSession session = request.getPortletSession(false);
Assert.notNull(session, "A PortletSession is required");
session.setAttribute(RESPONSE_INSTRUCTION_SESSION_ATTRIBUTE, responseInstruction);