tSetGlobalVar

tSetGlobalVar properties

Component family	Custom Code
Function	tSetGlobalVar allows you to define and set global variables in GUI.
Purpose	tSetGlobalVar facilitates the process of defining global variables.
Basic settings	Variables	This table contains two columns. Key: Name of the variable to be called in the code. Value: Value assigned to this variable.
Advanced settings	tStatCatcher Statistics	Select this check box to gather the Job processing metadata at a Job level as well as at each component level.
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. 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	This component is generally used as a one-component subjob.
Log4j	The activity of this component can be logged using the log4j feature. For more information on this feature, see Talend Studio User Guide. For more information on the log4j logging levels, see the Apache documentation at http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html.
Limitation	Knowledge of Java language is required.

Scenario: Printing out the content of a global variable

This scenario is a simple Job that prints out the value of a global variable defined
in the tSetGlobalVar component.

Setting up the Job

Drop the following components from the Palette onto the design workspace: tSetGlobalVar and tJava.
Connect the tSetGlobalVar component to the
tJava component using a Trigger > OnSubjobOk connection.

Configuring the tSetGlobalVar component

Double-click the tSetGlobalVar component to
display its Basic settings view.
Click the plus button to add a line in the Variables table, and fill the Key and Value fields with
K1 and 20 respectively.
Then double-click the tJava component to
display its Basic settings view.
In the Code area, type in the following
lines:

String foo = "bar"; String K1; String Result = "The value is:";

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String foo = "bar";
String K1;
String Result = "The value is:";

Result = Result + globalMap.get("K1");

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Result = Result + globalMap.get("K1");

System.out.println(Result); 

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System.out.println(Result);


In
this use case, we use the Result variable. To access the
global variable list, press Ctrl + Space bar on
your keyboard and select the relevant global parameter.

Job execution

Save your Job and press F6 to execute it.

The content of global variable K1 is displayed on the
console.

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

Thank you for watching.

Docs 5.x

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tSetGlobalVar – Docs for ESB 5.x