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How to read variable (xml) from workflowEvent

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kaushal13
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kaushal13
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28-09-2017

In workflow event , there xml variable which contains data.

I want to read those data to get some info out of it . How can i parse this data because when i try to check in event schema this variable is not present because data is not stored in data schema.

Thanks,

Kaushalevent_variable_xml.JPG

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MarcelSzimonisz
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02-10-2017

Hello,

You can access them by instance.vars. ...

instance.vars.CELL_OFFSET

Marcel

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kaushal13
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02-10-2017

Thanks Marcel for pointing how to use it , I guess instance variable in java script ,  can you please help with one example so i can explore further.  Thanks Schema_variables.JPG

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MarcelSzimonisz
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02-10-2017

Hello Kaushal,

You can consider them as global variables which can be used not only by downstreem activities but anywhere in in the wf instance see more below:

JavaScript scripts and templates

How to use an instance variable in a workflow Split activity

PS:

1316122_pastedImage_1.png

1316153_pastedImage_2.png

- you can also pass them from one runtime to another of the same wf

Marcel

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kaushal13
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02-10-2017

thanks for example. I am able to get the variable accessible in another activity of workflow.  but i can access these variable value if its static or one. how to read variable against the each column below is example:

1. there is variable element (xml) in workflowevent against each activity

2. when i read variable under each values its remain same for each instance.

event_variable_xml.JPG

output i want to retrieve

Event id , Cell_offest

39664368  72057.....

419..., 720....

JavaScript to get the data:

var query = xtk.queryDef.create(

    <queryDef schema={vars.targetSchema} operation="select" distinct = "true">

      <select>

        <node expr="@activity"/>

      </select>

    </queryDef>

  );

  var resul = query.ExecuteQuery();

  for each(var r in resul)

{

       logInfo( "Activity name " + r.@activity + " Schema Name : " + vars.schema);

}

logInfo:

02/10/2017 16:36:31 js Activity name fileExport Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name extract2 Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name queryEvents Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name writer22 Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name lock Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name extract Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name writer2 Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name delivery2 Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name schedule Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name query Schema Name : xtk:workflowEvent

02/10/2017 16:36:31 js Activity name start Schema Name : xtk:workflowEvent

if changing to  instance.vars.schema, all data appears as null

02/10/2017 16:41:32 js Activity name start4 Schema Name : undefined

02/10/2017 16:41:32 js Activity name fileExport Schema Name : undefined

02/10/2017 16:41:32 js Activity name extract2 Schema Name : undefined

02/10/2017 16:41:32 js Activity name queryEvents Schema Name : undefined

02/10/2017 16:41:32 js Activity name writer22 Schema Name : undefined

02/10/2017 16:41:32 js Activity name lock Schema Name : undefined

02/10/2017 16:41:32 js Activity name extract Schema Name : undefined

02/10/2017 16:41:32 js Activity name writer2 Schema Name : undefined

02/10/2017 16:41:32 js Activity name delivery2 Schema Name : undefined

02/10/2017 16:41:32 js Activity name schedule Schema Name : undefined

02/10/2017 16:41:32 js Activity name query Schema Name : undefined

02/10/2017 16:41:32 js Activity name start Schema Name : undefined

02/10/2017 16:41:32 js Activity name signal Schema Name : undefined

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MarcelSzimonisz
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03-10-2017

Hello Kaushal,

-why you need to use xtkQuerDef? You can access current workflow instance, event,task ... variables by eg typing instance.vars.CELL_OFFSET... what ever is created by developer or by any activity, event automatically.

-why targetSchema is undefined? because i presume your only activity in wf is javascript activity you need to have any of query activities

--> read group, query, rdbms, file import ... to have this variable initialized in vars.tergetSchema

1316647_pastedImage_0.png

1316742_pastedImage_2.png

1316741_pastedImage_1.png

Without query activity you get undefined

1316743_pastedImage_3.png

1316744_pastedImage_4.png

PS:

Bytheway you have helped me too. Where have you found vars.targetingSchema I was looking for variable that holds temp table schema name and had to get this information differently

Marcel

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MarcelSzimonisz
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03-10-2017

just found out query does not initialize the vars.targetSchema.. so far readGroup it is doing and enrichment that i have used and they work