Passing data from tJavaRow to tJava in Talend

Question

I'm using Talend for an integration, I'm wondering it is it possible to pass data from tJavaRow to tJava components.

For example:

tJavaRow component:

String check = input_row.foo;

if( check.contains("Yes")){
    String ret  = "OK";
    return ret; 
}

tJava component:

System.out.println(ret);

Is there a way to print ret, which is a result of a computation of a previous component inside a next component?

Answer 1

The solution is to use the globalMap or a tSetGlobalMap

globalMap.put("ret", ret);

and recover it with

globalMap.get("ret");

/!\ IMPORTANT /!\

But note that if you use a tJava in a main flow like

tRowGenerator > row1 > tJava > row2> tLogRow

• tRowGenerator generating 10 rows for 1 to 10
• tJava like System.out.println("foo");
• tLogRow print the numeric value

The output will be

foo
1
2
3
4
5
6
7
8
9
10

The code in tJava is only executed once before the first row is even generated. Checking the generated code, you can see

System.out.println("foo");
....
for(int i = 0; i < 10; i++){
    logrow.print(i);
}