tForeach

Creates a loop on a list for an iterate link.

tForeach Standard properties

These properties are used to configure tForeach running in the Standard Job framework.

The Standard
tForeach component belongs to the Orchestration family.

The component in this framework is available in all Talend
products.

Basic settings

Values	Use the [+] button to add rows to the Values table. Then click on the fields to enter the list values to be iterated upon, between double quotation marks.

Advanced settings

tStatCatcher Statistics	Select this check box to collect the log data at a component level.

Global Variables

Global Variables	ERROR_MESSAGE: the error message generated by the component when an error occurs. This is an After variable and it returns a string. This variable functions only if the Die on error check box is cleared, if the component has this check box. CURRENT_VALUE: the value currently iterated upon. This is a Flow variable and it returns a string. A Flow variable functions during the execution of a component while an After variable functions after the execution of the component. To fill up a field or expression with a variable, press Ctrl + Space to access the variable list and choose the variable to use from it. For further information about variables, see Talend Studio User Guide.

ERROR_MESSAGE: the error message generated by the
component when an error occurs. This is an After variable and it returns a string. This
variable functions only if the Die on error check box is
cleared, if the component has this check box.

CURRENT_VALUE: the value currently iterated upon. This is
a Flow variable and it returns a string.

A Flow variable functions during the execution of a component while an After variable
functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl +
Space to access the variable list and choose the variable to use from it.

For further information about variables, see
Talend Studio

User Guide.

Usage

Usage rule	tForeach is an input component and requires an Iterate link to connect it to another component.

Iterating on a list and retrieving the values

This scenario describes a two component Job in which a list is created and iterated upon in a
tForeach component. The values are then retrieved
in a tJava component.

Setting up the Job

Drop a tForeach and a tJava component onto the design workspace.
Link tForeach to tJava using a Row >
Iterate connection.

Configuring the components

Double-click tForeach to open its
Basic settings view:
Click the [+] button to add as many rows
to the Values list as required.
Click on the Value fields to enter the
list values, between double quotation marks.
Double-click tJava to open its
Basic settings view:
Enter the following Java code in the Code area:
System.out.println(globalMap.get("tForeach_1_CURRENT_VALUE")+"_out");

Saving and executing the Job

Press Ctrl+S to save
your Job.
Press F6 to execute the
Job.

The tJava run view displays the list values
retrieved from tForeach, each one suffixed
with _out:

Document get from Talend https://help.talend.com

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Docs 7.x

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tForeach – Docs for ESB 7.x