tLibraryLoad - 6.3

Talend Open Studio for Big Data Components Reference Guide

EnrichVersion
6.3
EnrichProdName
Talend Open Studio for Big Data
task
Data Governance
Data Quality and Preparation
Design and Development
EnrichPlatform
Talend Studio

Function

tLibraryLoad allows you to import a library.

Purpose

tLibraryLoad allows you to load useable Java libraries in a Job.

tLibraryLoad properties

Component Family

Custom Code

 

Basic settings

Library

Select the library you want to import from the list, or click on the [...] button to browse to the library in your directory.

Advanced settings

Dynamic Libs

Lib Paths: Enter the access path to your library, between double quotation marks.

 

Import

Enter the Java code required to import, if required, the external library used in the code editing field of the Basic settings tab of the components such as tJava,or tJavaFlex.

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 may be used alone, although it is more logical to use it as part of a Job.

Log4j

If you are using a subscription-based version of the Studio, 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

The library is loaded locally.

Scenario: Checking the format of an e-mail address

This scenario uses two components, a tLibraryLoad and a tJava. The goal of this scenario is to check the format of an e-mail address and verify whether the format is valid or not.

Setting up the Job

  1. In the Palette, open the Custom_Code folder, and slide a tLibraryLoad and tJava component onto the workspace.

  2. Connect tLibraryLoad to tJava using a Trigger > OnSubjobOk link.

Configuring the tLibraryLoad component

  1. Double-click on tLibraryLoad to display its Basic settings. From the Library list, select jakarta-oro-2.0.8.jar.

  2. In the Import field of the Advanced settings tab, type import org.apache.oro.text.regex.*;

Configuring the tJava component

  1. Double-click on tJava to display its Component view.

  2. In the Basic settings tab, enter your code, as in the screenshot below. The code allows you to check whether the character string pertains to an e-mail address, based on the regular expression: "^[\\w_.-]+@[\\w_.-]+\\.[\\w]+$".

Job execution

Press F6 to save and run the Job.

The Console displays the boolean false. Hence, the e-mail address is not valid as the format is incorrect.