topic Project level vars in Talend Studio

Project level vars

pthomas — Tue, 25 Mar 2025 17:29:13 GMT

I have a few values that persist across jobs... or at least their need does. In Talend, how can I make a project level value that can be called by any job that needs it?

eg. bob = "some guid value based on a subscription"

I need bob's value every time I call an api to bob's api list. And bob has a lot of apis! If my subscription changes, then I have to update every flow where bob's guid value is used.

Re: Project level vars

quentin-vigne — Wed, 26 Mar 2025 10:03:03 GMT

Hello @pthomas

For that use I recommend the use of context variable ! On the left side of the Talend Designer, there is a category called "contexts"

Create a new context with your needs.
For example a context_api with variable such has "url".

When needed just import the context from the context tab below the designer and call it in your components with the value context.context_api_url like this :

- Quentin

Re: Project level vars

pthomas — Wed, 26 Mar 2025 12:19:06 GMT

Context vars seem to only exist within a job. Is there anything that can be written once and used in many jobs?

Re: Project level vars

quentin-vigne — Wed, 26 Mar 2025 13:13:51 GMT

I can confirm that context once created from the context category (on the left side of the designer) are available from any job.

Here is a screenshot (sorry if it's in french)

This is below the job list. Create a context group and you can use everywhere in your projetct.

- Quentin.

Re: Project level vars

pthomas — Wed, 26 Mar 2025 16:52:53 GMT

Got it thanks. I've seen context within a job but missed the left side folder.

So creating a context on the left, I can then add that to context each job in the "job context" and only have to change a value in 1 place.

Re: Project level vars

quentin-vigne — Thu, 27 Mar 2025 08:03:11 GMT

Yes, exactly.

For example we use context for an API call to create a ticket if the job failed.

Since this API call is in every job we needed to add it to a context and if it change we only have to edit the context, all of the jobs will then use the new values of the context.

- Quentin