topic Re: User Defined routines in Talend Studio

User Defined routines

Soumya_M — Fri, 15 Nov 2024 22:13:53 GMT

Hello,

I've created a user routine under Global routines wizard, when i create this routine, it is supposed to appear in tmap >expression builder > User defined list. But is not appearing in the list, can anyone help me out with this one ?

Re: User Defined routines

jlolling — Mon, 02 Jan 2023 10:11:55 GMT

Talend has its own mechanism for setup comments and a kind of JavaDoc to use it in the expression builder as template suggestion.

The problem is the {Category} tag. Please type here your class name - a Talend routine is simply a Java class with static methods.

Here an example:

/**

* returns the first not empty string

* {Category} StringUtil

* {talendTypes} String

* {param} string("testMe1","testMe2") strings: String.

* {example} coalesce(" test","hans"," TEST ","Tata") # "test"

public static String coalesce(String... strings) {

for (String s : strings) {

if (s != null) {

s = s.trim();

if (isEmpty(s) == false) {

return s;

}

return null;

}

Re: User Defined routines

jlolling — Mon, 02 Jan 2023 10:13:38 GMT

If you want to see some more examples, take a look at my library: https://github.com/jlolling/talend_routines

Thats my library of Talend routines I have collected over many years.

Re: User Defined routines

zjing — Wed, 04 Jan 2023 17:13:17 GMT

hello ,

could you share you code above your method?

Re: User Defined routines

jlolling — Wed, 04 Jan 2023 17:48:24 GMT

Take a look into my provided examples above. You will find tons of code!

My example here is from the class StringUtil - also part of my routine library (see github link)