topic Re: How to get an instence of a component in tjava in Talend Studio

How to get an instence of a component in tjava

Anonymous — Thu, 27 Apr 2017 13:51:06 GMT

I want ask if there is way to get an instance of a component if a job(ex:tmap , tmysqlinput) in tjava code and then manipulate it manually using code

Help please

Re: How to get an instence of a component in tjava

TRF — Thu, 27 Apr 2017 16:18:41 GMT

Very hazardous. Looking at the generated Java code will give you some answers (I think so).
In fact, accessing to some objects properties is possible (there is blogs and articles about this) but changing anything seems to be dangerous (IMHO).

Re: How to get an instence of a component in tjava

Anonymous — Thu, 27 Apr 2017 16:30:20 GMT

hi TRF

thank you again for your answer

would you mind giving me some example or links on how can i access to object properties

actually i want to find a way on how can i add with javacode some column to a csv file structure

thank you

Re: How to get an instence of a component in tjava

TRF — Thu, 27 Apr 2017 17:20:21 GMT

Well, I don't want give you bad information regarding this little bit tricky subject.

May be a guy as @rhall can give you good directions or advices.

Also Bekwam's blog may help you.

Regards,

Re: How to get an instence of a component in tjava

Anonymous — Thu, 27 Apr 2017 19:35:59 GMT

You don't have total control over other components at runtime, but you can take some control. An example of this is switching Connections (DB and FTP, for example) at runtime. This tutorial shows how this is achieved by using Java (https://www.rilhia.com/quicktips/quick-tip-dynamically-change-db-connection). As @TRF suggests, it is not necessarily the safest thing to be trying. But sometimes it can actually be quite useful. However this is not really documented anywhere and would probably be considered "hacking". Remember to look at the code that is generated. If you can read Java, you will learn a lot.

Re: How to get an instence of a component in tjava

Anonymous — Thu, 27 Apr 2017 20:34:51 GMT

rhall2_0

thank you very much for your explanation