Simple question (BUT URGENT!!) about ZSCRIPT

asked 2008-11-05 08:28:01 +0800

ziccardi
321 ● 7

updated 2008-11-05 08:32:03 +0800

Hi all.

Why, when I try to access the arg variable, I get the following error?

attempt to resolve method: get() on undefined variable or class name: arg

My zul file is as follows:

Thanks!

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answered 2008-11-05 09:12:16 +0800

ziccardi
321 ● 7

Hi all.
Even if I try to access the window this way, I get the same error:

It says wid is not defined...

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answered 2008-11-05 10:06:24 +0800

ziccardi
321 ● 7

Noone has been able to give an hint....
I solved it with a workaround: I access the components using Path.getComponent("path/to/the/component"), and I access
the args through the Executions object.

Regards.

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answered 2008-11-06 14:08:56 +0800

henrichen
3869 ● 2
ZK Team

That is weird. Can you give complete sample codes?

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answered 2008-11-06 16:16:27 +0800

ziccardi
321 ● 7

I tried to replicate the problem in another simple app, but it seems it works in other scenarious.

One of the ZUL pages that do not works is the following:

<?page id="testZul" title=" New ZUL Title" cacheable="false" 
	language="xul/html" zscriptLanguage="Java" contentType="text/html;charset=UTF-8"?>

<?link rel="stylesheet"  type="text/css" href="..."?>

<zk xmlns="http://www.zkoss.org/2005/zul"
	xmlns:h="http://www.w3.org/1999/xhtml" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://www.zkoss.org/2005/zul http://www.zkoss.org/2005/zul/zul.xsd">

<window title="Apertura Pratica" id="wid" width="300px">

<zscript>

	import org.jbpm.JbpmConfiguration;
	import org.jbpm.JbpmContext;
	import org.jbpm.context.exe.ContextInstance;
	import org.jbpm.db.GraphSession;
	import org.jbpm.graph.def.Node;
	import org.jbpm.graph.exe.ProcessInstance;
	import org.jbpm.graph.exe.Token;
	import org.zkoss.zul.Label;
	import org.zkoss.zul.Row;
	import org.zkoss.zul.RowRenderer;
	import org.jbpm.taskmgmt.exe.TaskInstance;
	
	//Long lTaskID = Executions.getCurrent().getArg().get("ID");
	Long lTaskID = arg.get("ID");
	Long lProcessID = null;
	JbpmContext jbpmContext = null;

	List vFiles = new ArrayList();
	String sSocieta = "";
	
	
	try
	{
		jbpmContext =  JbpmConfiguration.getInstance().createJbpmContext();
		//Prelevo il process id
		TaskInstance ti = jbpmContext.getTaskInstance(lTaskID.longValue());
		ProcessInstance pi = ti.getProcessInstance();
		lProcessID = new Long(pi.getId());
		//////////////////////////////
				
		List v = (List) pi.getContextInstance().getVariable("AP_FILES");
		sSocieta = (String) pi.getContextInstance().getVariable("SOCIETA");
		if (v != null)
			vFiles = v;
		if (sSocieta == null)
			sSocieta = "";
		
		//alert(pi);
	}
	finally
	{
		if (jbpmContext != null)
			jbpmContext.close();
	}
</zscript>

	<vbox>
		<grid>
		   <rows>
		   		<row>
					Nome Societa' :
					<textbox id="societa" text="${sSocieta}"/>
				</row>
			</rows>
		</grid>
		Lista Documenti allegati: 
		<grid id="fileList">
			<columns>
				<column label="Nome File"/>
			</columns>
		</grid>

		<zscript>
			Grid g = Path.getComponent("/wid/fileList");
			g.setModel(new SimpleListModel(vFiles));
		
			void onSave()
			{
				Window w = (Window) Path.getComponent("/wid");
				Textbox txtSocieta = (Textbox) Path.getComponent("/wid/societa");
				
				JbpmContext jbpmContext = null;

				try
				{	
					jbpmContext =  JbpmConfiguration.getInstance().createJbpmContext();
					//GraphSession graphSession = jbpmContext.getGraphSession();
					ProcessInstance pi = jbpmContext.getProcessInstance(lProcessID.longValue());
					//List v = (List) pi.getContextInstance().getVariable("AP_FILES");
					//if (v != null)
					//	vFiles = v;
					
					pi.getContextInstance().setVariable("AP_FILES", vFiles);
					pi.getContextInstance().setVariable("SOCIETA", txtSocieta.getText());
					
					jbpmContext.save(pi);
					
				}
				finally
				{
					if (jbpmContext != null)
						jbpmContext.close();
				}

				w.detach();
			}

			void onValidate()
			{
				Window w = (Window) Path.getComponent("/wid");
				Textbox txtSocieta = (Textbox) Path.getComponent("/wid/societa");
				
				JbpmContext jbpmContext = null;

				try
				{	
					jbpmContext =  JbpmConfiguration.getInstance().createJbpmContext();
					//GraphSession graphSession = jbpmContext.getGraphSession();
					ProcessInstance pi = jbpmContext.getProcessInstance(lProcessID.longValue());
					//List v = (List) pi.getContextInstance().getVariable("AP_FILES");
					//if (v != null)
					//	vFiles = v;
					
					pi.getContextInstance().setVariable("AP_FILES", vFiles);
					pi.getContextInstance().setVariable("SOCIETA", txtSocieta.getText());
					
					
					TaskInstance ti = jbpmContext.getTaskInstance(lTaskID.longValue());
					ti.end("validazione");
					
					jbpmContext.save(pi);
					
				}
				finally
				{
					if (jbpmContext != null)
						jbpmContext.close();
				}

				w.detach();
			}
			
		</zscript>
		
		<button label="Allega Nuovo File">
			<attribute name="onClick">
			{
				Object media = Fileupload.get();
				if (media != null)
				{	
					String s = media.getName();
					vFiles.add(s);
					Grid g = Path.getComponent("/wid/fileList");
					g.setModel(new SimpleListModel(vFiles));
				}
			}
			</attribute>
		</button>
		
		<hbox>
			<button label="Salva Modifiche" onClick="onSave()"/>
			<button label="Invia in approvazione" onClick="onValidate()"/>
		</hbox>


	</vbox>
	
	
</window>
</zk>

My application works like this:
I have a workflow, managed through JBPM.
I want all the pages to be embedded inside the workflow, so that I can change the workflow, without the need to change the WEB application.

I solved it this way: inside the workflow package (the .par archive), I put all the pages needed to handle the workflow step.

Than, as on enter event of each step, I create a variable that holds the content of the zul page.

In my web application, I simply ask the flow item to give me the source of the zul page needed to handle itself. Then I create the page with Executions.createComponentDirectly.

The code that creates the page, is:

        private Window createPage(Long lProcessID)
	{
		JbpmContext jbpmContext = null;
		
		try
		{
			jbpmContext =  JbpmConfiguration.getInstance().createJbpmContext();
			//GraphSession graphSession = jbpmContext.getGraphSession();
			TaskInstance ti = jbpmContext.getTaskInstance(lProcessID.longValue());
			
			ProcessInstance pi = ti.getProcessInstance();
			//ProcessInstance pi = jbpmContext.getProcessInstance();
			//ProcessInstance pi = (ProcessInstance) graphSession.findProcessInstances().get(0);
			String sPage = (String) pi.getContextInstance().getVariable("PAGE");
			
			Map args = new HashMap();
			args.put("ID", lProcessID);
			
			return (Window) Executions.createComponentsDirectly(sPage, "zul", null, args);
			
		}
		finally
		{
			if (jbpmContext != null)
				jbpmContext.close();
		}
	}

Thank you.