tSVNLogInput - 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

This component retrieves the information of one or more revisions from an SVN repository.

Purpose

This component allows you to retrieve the information of a specified revision or range of revisions from an SVN repository.

tSVNLogInput properties

Component family

Internet

 

Basic settings

URL

Type in the URL to the SVN repository to be accessed.

 

Need authentication?

Select this check box if authentication is needed to access the SVN repository.

 

Username and Password

Enter the username and password to access the SVN repository if authentication is needed.

To enter the password, click the [...] button next to the password field, and then in the pop-up dialog box enter the password between double quotes and click OK to save the settings.

These two fields appear only when the Need authentication? check box is selected.

 

From revision

Specify a start revision number of the revision range.

 

Only this revision

Select this check box if you need to retrieve the information of only the revision specified in the From revision field.

 

To revision

Specify an end revision number of the revision range. Enter 'HEAD' for the latest revision.

This field disappears when the Only this revision check box is selected.

 

Schema and Edit schema

A schema is a row description, it defines the fields to be processed and passed on to the next component.

The schema of this component is read-only. It describes the properties of the revision information. You can click the [...] button next to Edit schema to view the predefined schema which contains the following fields:

  • revision: the revision number of the log message.

  • author: the author who commits the log message.

  • date: the date when the log message was committed.

  • message: the content of the log message.

  • nb_file_added: the number of added files.

  • nb_file_modified: the number of modified files.

  • nb_file_deleted: the number of deleted files.

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

NB_LINE: the number of rows processed. This is an After variable and it returns an integer.

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 usually used as a start component in a Job and it needs an output link.

Connections

Outgoing links (from this component to another):

Row: Main, Iterate

Trigger: On Subjob Ok, On Subjob Error, Run if, On Component Ok, On Component Error

Incoming links (from one component to this one):

Row: Main, Iterate

Trigger: On Subjob Ok, On Subjob Error, Run if, On Component Ok, On Component Error

For further information about connections, see Talend Studio User Guide.

Limitation

N/A

Scenario: Retrieving a log message from an SVN repository

This scenario describes a two-component Job that retrieves the information of a specified revision from an SVN repository, and displays the information on the console.

  1. Create a new Job and add the following two components by typing their names in the design workspace or dropping them from the Palette: a tSVNLogInput component and a tLogRow component.

  2. Connect tSVNLogInput to tLogRow using a Row > Main link.

  3. Double-click tSVNLogInput to open its Basic settings view.

  4. In the URL field, enter the URL to the SVN repository to be accessed. In this example, it is https://talend.com/svndoc/. Note that the login credentials provided here is for demonstration only.

  5. Select the Need authentication? check box and fill in the Username and Password fields with your authentication information.

  6. Specify a revision or revision range. In this example, we want to retrieve the information of revision 17090 only, so enter 17090 in the From revision field and select the Only this revision check box.

  7. Double-click tLogRow to open its Basic settings view.

  8. Define the way you want the output data to be displayed on the console. In this example, enter "\r\n" in the Field Separator field to display each field of the revision information in a separate line.

  9. Select the Print schema column name in front of each value check box to show the name of each field of the revision information at the beginning of each line.

  10. Press Ctrl + S to save the Job and then F6 to run the Job.

    As shown above, the information of the specified revision is displayed on the console.