topic Modify context variable permanently in Talend Studio

Modify context variable permanently

Anonymous — Mon, 23 Apr 2018 16:20:26 GMT

Hi,

Is it possible to modify a context variable within a job, so I can use the newest value of the context variable the next time I run the job?

I would like to use this feature to store the last time the job has run btw.

Thanks.

Re: Modify context variable permanently

TRF — Mon, 23 Apr 2018 16:23:46 GMT

Use tContextDump to overwrite the context file with the current values for all the context variables.

Re: Modify context variable permanently

Anonymous — Mon, 23 Apr 2018 16:39:33 GMT

A context file? I'am new to Talend so I don't really know what a context file is, I'am just using the view under my job for setting the context variables and I preferer to keep it this way so I don't have to create other seperate files on my computer.

Re: Modify context variable permanently

TRF — Mon, 23 Apr 2018 16:53:56 GMT

This view is usefull only when running jobs from the Studio.

As soon as you'll run the jobs from the command line or a scheduler, you'll have to manage 1 or more context files which can be overwritten at runtime bt the jobs.

During the development cycle, it's a good practice to use a context file to avoid any surprrise after job deployment.

Have a look to the documentation or search for "implicit context" or something like that.

Re: Modify context variable permanently

Anonymous — Tue, 24 Apr 2018 15:40:41 GMT

I tried to override the context variable with a tJava but when i use a tContextDump it stills printing the old value in the file. How I can overcome this?

Re: Modify context variable permanently

TRF — Tue, 24 Apr 2018 16:20:06 GMT

Share your job design and tJava piece of code

Re: Modify context variable permanently

Anonymous — Wed, 21 Nov 2018 18:52:41 GMT

I have tried tcontextDump with tjavaRow and tContextLoad.
The log is succesfull but after running the job the context variable does not get updated...

The idea is to store in the context variable the last time the job run in order to load only the delta

Re: Modify context variable permanently

Anonymous — Wed, 21 Nov 2018 18:54:54 GMT

The code of tJavaRow is the following:

output_row.key = input_row.key;
output_row.value = input_row.value;
if(output_row.key.contains("date"))
{
output_row.value = "Hello";
}