topic Re: throw new Error in Alfresco workflow in Alfresco Archive

throw new Error in Alfresco workflow

irenailievska — Tue, 12 Jan 2016 13:10:28 GMT

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="

Re: throw new Error in Alfresco workflow

muralidharand — Wed, 13 Jan 2016 14:05:20 GMT

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

 alert('welcome'); ‍

will not show.

Re: throw new Error in Alfresco workflow

irenailievska — Thu, 14 Jan 2016 10:41:49 GMT

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) ?

Re: throw new Error in Alfresco workflow

darkredd — Thu, 14 Jan 2016 13:45:16 GMT

Hi,

Use the method in this way and it should work:

throw(message)‍

that will throw a popup on your screen.

Re: throw new Error in Alfresco workflow

irenailievska — Fri, 15 Jan 2016 08:32:22 GMT

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?

Re: throw new Error in Alfresco workflow

muralidharand — Sat, 16 Jan 2016 10:16:46 GMT

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>

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Hope this helps you.

Thanks,
Murali.

Re: throw new Error in Alfresco workflow

irenailievska — Mon, 18 Jan 2016 10:49:28 GMT

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?

Re: throw new Error in Alfresco workflow

muralidharand — Tue, 19 Jan 2016 06:11:34 GMT

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

Re: throw new Error in Alfresco workflow

darkredd — Tue, 19 Jan 2016 07:31:18 GMT

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.

Re: throw new Error in Alfresco workflow

muralidharand — Fri, 22 Jan 2016 17:56:19 GMT

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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Re: throw new Error in Alfresco workflow

irenailievska — Mon, 25 Jan 2016 14:04:23 GMT

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

Re: throw new Error in Alfresco workflow

darkredd — Tue, 26 Jan 2016 08:25:47 GMT

Hi Irena,

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

Re: throw new Error in Alfresco workflow

irenailievska — Tue, 26 Jan 2016 08:37:52 GMT

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

Re: throw new Error in Alfresco workflow

muralidharand — Thu, 28 Jan 2016 04:23:59 GMT

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

Re: throw new Error in Alfresco workflow

irenailievska — Thu, 28 Jan 2016 07:51:06 GMT

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

Re: throw new Error in Alfresco workflow

muralidharand — Thu, 28 Jan 2016 18:40:01 GMT

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.

Re: throw new Error in Alfresco workflow

irenailievska — Mon, 01 Feb 2016 12:11:04 GMT

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

Re: throw new Error in Alfresco workflow

muralidharand — Mon, 01 Feb 2016 16:08:47 GMT

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

Re: throw new Error in Alfresco workflow

irenailievska — Tue, 02 Feb 2016 09:06:00 GMT

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.

Re: throw new Error in Alfresco workflow

krutik_jayswal — Thu, 15 Feb 2018 13:43:16 GMT

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.