[jboss-user] [JBoss Seam] - Re: Request4Advice: Defining ProcessInstance Var's in Pagefl

[mgombocz]

To whom it may concern.

So, here's a solution (a few hours of sleep helped...):

First of all here's my pageflow where I initialize and update two process variables named "totalPages" and "currentPage":
<pageflow-definition name="createUser">
  | 	<event type="process-start" >
  | 		<script>
  | 			<expression>
  | 				int total = 2;
  | 				int current = 1;
  | 			</expression>
  | 			<variable name="totalPages" mapped-name="total" access="write" />
  | 			<variable name="currentPage" mapped-name="current" access="write" />
  | 		</script>
  | 	</event>
  | 
  | 	<start-page name="createUser" view-id="/editUser.xhtml">
  | 		<redirect />
  | 
  | 		<transition name="cancel" to="cancelled" />
  | 		<transition name="save" to="evaluate">
  | 		</transition>
  | 	</start-page>
  | 
  | 	<decision name="evaluate"
  | 		expression="#{userManager.usernameUnique}">
  | 
  | 		<transition name="true" to="enterRoles">
  | 			<action expression="#{userManager.save}" />
  | 			<script>
  | 				<expression>
  | 					current++;
  | 				</expression>
  | 				<variable name="currentPage" mapped-name="current" access="read,write" />
  | 			</script>
  | 		</transition>
  | 
  | 		<transition name="false" to="createUser" />
  | 	</decision>
  | 
  | 	<page name="enterRoles" view-id="/editUserRoles.xhtml">
  | 		<redirect />
  | 
  | 		<transition name="save" to="finished">
  | 			<action expression="#{userManager.flush}" />
  | 		</transition>
  | 
  | 		<transition name="previous" to="createUser">
  | 			<script>
  | 				<expression>
  | 					current--;
  | 				</expression>
  | 				<variable name="currentPage" mapped-name="current" access="read,write" />
  | 			</script>
  | 		</transition>
  | 
  | 		<transition name="cancel" to="cancelled" />
  | 	</page>
  | 
  | 	<page name="finished" view-id="/showUser.xhtml">
  | 		<redirect />
  | 		<end-conversation />
  | 	</page>
  | 
  | 	<page name="cancelled" view-id="/searchUser.xhtml">
  | 		<redirect />
  | 		<end-conversation />
  | 	</page>
  | 
  | </pageflow-definition>

These two variables can then be accessed in the views via:
#{pageflow.processInstance.contextInstance.variables['currentPage']}
  | #{pageflow.processInstance.contextInstance.variables['totalPages']}

For whatever reason using context variable "processInstance" directly does not work, like
#{processInstance.contextInstance.variables['currentPage']}
  | 

Cheers.

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