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throw new Error in Alfresco workflow

irenailievska

I want to throw error in a custom alfreso workflow, but just as a popup message to the user that he entered something wrong.
I tried to do this

<activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string><![CDATA[
            …………………….
            var message = 'IT LIVES';
            throw message;]]></activiti:string>
          </activiti:field>
        </activiti:taskListener>
‍‍‍‍‍‍‍‍‍‍

I tried doing this also

…
throw new Error("some text");
…
‍‍‍‍‍

Since I am writing here it means it didn't work.
Please can somebody help me?
Just a simple alert window doesn't help me if the user submits the action after all. I need something to stop the user from continuing the process if the data he entered is not correct.

Thanks in advance,
Irena

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Comments

muralidharand

ScriptTaskListener code runs in Server and not in the browser side.
So, if you call

 alert('welcome'); ‍

will not show.

irenailievska

OK it makes sense… I know that the code runs on server side, just wanted to try anything. Do you perhaps know how to throw an error message (popup) ?

darkredd

Hi,

Use the method in this way and it should work:

throw(message)‍

that will throw a popup on your screen.

irenailievska

Exception while invoking TaskListener: 00150013 Failed to execute supplied script ….
It looks like that throw expects to get something else. I tried adding message as you suggested but it doesn't work.
I am putting this code inside the workflow definition. Maybe I am supposed to put it somewhere else?

muralidharand

Hi,

You have to use

 throw new Error("") ‍

to error message to the user.
Here is the code snippet to throw error message to user.

<serviceTask id="alfrescoScripttask1" name="Validate input params" activiti:class="org.alfresco.repo.workflow.activiti.script.AlfrescoScriptDelegate">
      <extensionElements>
        <activiti:field name="script">
          <activiti:string>
        <![CDATA[if (bpm_package.children.length == 0 )
        {
          throw new Error ("No workflow folder found.Please select one.");
        }
        if (bpm_package.children.length > 1 )
        {
          throw new Error ("More than one workflow attachments found, Please select only one workflow folder.");
        }
]]></activiti:string>
        </activiti:field>
      </extensionElements>
</serviceTask>

‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Hope this helps you.

Thanks,
Murali.

irenailievska

Does it have to be a service task in order to throw new Error? I tried doing the same thing, but in an User Task.
I need to throw the error when the user makes a choice in the workflow - when he completes a task. This is so in order to not let the user task to continue if the info entered is wrong. So I tried throwing error in the complete event of the user task.
Is this possible?

muralidharand

I haven't tried at the user task completion. Anyway, let me take a look and will come back to you.

darkredd

Hi,

I use it with a user task, though as a supplied script. I write a separate script and embed it to the user task, that way I do not have to redeploy the bpm every time I make changes.
Try using the "throw" in a independent script.

muralidharand

I tested with simple user task and it is working me, means throwing the error message.
If you use the service task, it is failed, I believe , the current task will not be completed and goes back to prev. task. I am not sure what happen if you update some values in the system.


<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
  <process id="myDemoProcess" name="My Demo Process" isExecutable="true">
    <startEvent id="startevent1" name="Start"></startEvent>
    <userTask id="usertask1" name="User Task" activiti:assignee="admin">
      <extensionElements>
        <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string><![CDATA[throw new Error ("called");]]></activiti:string>
          </activiti:field>
        </activiti:taskListener>
      </extensionElements>
    </userTask>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow2" sourceRef="usertask1" targetRef="endevent1"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_myDemoProcess">
    <bpmndi:BPMNPlane bpmnElement="myDemoProcess" id="BPMNPlane_myDemoProcess">
      <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="210.0" y="200.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
        <omgdc:Bounds height="55.0" width="105.0" x="290.0" y="190.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="440.0" y="200.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="245.0" y="217.0"></omgdi:waypoint>
        <omgdi:waypoint x="290.0" y="217.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="395.0" y="217.0"></omgdi:waypoint>
        <omgdi:waypoint x="440.0" y="217.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>


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irenailievska

I tried the same thing. I don't know what is wrong. The error that I get is shown on the error.png file that I attached. I don't know. Maybe I need to set something somewhere?
This is very important for my project and I am stuck with this

.
Thank you people for trying to help

Irena

error_2.PNG

darkredd

Hi Irena,

Please attach your bpm file so we can plug it into our environment to debug for you.

irenailievska

I just removed the throw error part. You can try to put it any where. Can you just tell me if I am supposed to set it somewhere else so I can throw an error? Maybe in some file…
Thank you

fullProcess_0.txt.zip

muralidharand

Hi,
I'm able to see the error message.Refer the attached.

error_2_0.PNG

irenailievska

But that error is not what I need. I need to have the message (ex."The values you entered are not correct") in the popup instead of the generic code.
This is the problem I have

muralidharand

Here I'm throwing error message as "called", you can change this message as per you wish.

<activiti:string><![CDATA[throw new Error ("called");]]></activiti:string>
‍‍‍

<activiti:string><![CDATA[throw new Error ("The values you entered are not correct");]]></activiti:string>
‍‍‍

Please let me know, If I understood your question wrongly.

irenailievska

Thanks

. I would have to manage like this…. I thought that I might be able to have only the message I want instead of org.activiti.engine.ActivitiException: Exception while invoking TaskListener: Exception while invoking TaskListener: 01010014 Failed to execute supplied script: 01010013 Error: The values you entered are not correct .
But I will do it like this.
Thank you and all the others that helped

muralidharand

Sadly,you can't get rid out of alfresco / activiti namespace.

irenailievska

I have one more issue - I use the way you suggested and it works, but I need to check if a checkbox is checked or not.
So when at the beginning the box is not checked it throws the error as it should, but if I check it after the throwing of the error it still throws the error - like it can't catch the change I made.
Is there some way to catch the change I made?
Thank you

************* EDIT ****************
I found my error - I was checking if the checkbox value was true or false but with 'true' and needed to exclude the single quotes.

krutik_jayswal

When alfresco is rendering the workflow form , it is rendering the transition button using the activiti-transition.js file.Basically this buttons are doing nothing more but submitting the workflow form.

This is how the flow is going when we submit a workflow form.

activiti-transition is submiting the workflow form.
Using a function named as submitForm which resides inside alfresco.js, it is invoking an submit event of form
Inside the forms-runtime.js file there is one function named as _submitInvoked(handles the submit event of form), which is responsible for making an ajax call and submitting the workflow form.If there is error while submitting , it will display the error which is from backend.

So the best to customize the error pop up is to change activiti-transition.ftl and activiti-transition.js file , to make an ajax call and handle the response as we want.

activiti-transition.js file has a function named as onClick: function ActivitiTransitions_onClick(e, p_obj).What it does is , it converts the form element in json object and finally submit that form.Below is line which is responsible for this.

Alfresco.util.submitForm(p_obj.getForm());

Inside this activiti-transition.js file if we do all this things manually and handle the server response, we will be able to handle the error message ultimately.