August 17, 2023

tFileInputProperties – Docs for ESB 5.x

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tFileInputProperties

tFileInputProperties_icon32_white.png

tFileInputProperties properties

Component family

File/Input

  

Function

tFileInputProperties reads a text
file row by row and extracts the fields.

Purpose

tFileInputProperties opens a text
file and reads it row by row then separates the fields according to
the model key = value.

Basic settings

Schema and Edit
Schema

A schema is a row description, it defines the number of fields to be processed and
passed on to the next component. The schema is either Built-in or stored remotely in the
Repository.

For this component, the schema is read-only. It is made of two
column, Key and Value,
corresponding to the parameter name and the parameter value to be
copied.

 

File format

Select from the list your file format, either: .properties or .ini.

 

 

.properties: data in the
configuration file is written in two lines and structured according
to the following way: key = value.

 

 

.ini: data in the configuration
file is written in two lines and structured according to the
following way: key = value and re-grouped in sections.

Section Name: enter the section
name on which the iteration is based.

 

File Name

Name and path to the file to be created and/or the variable to be
used.

For further information about how to define and use a variable,
see Talend Studio
User Guide.

 

Calculate MD5 Hash

Select this check box to verify that the file to be processed has
been correctly downloaded.

Advanced settings

Encoding

Select the encoding type from the list or select Custom and define it manually. This field
is compulsory for DB data handling.

 

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

Use this component to read a text file and separate data according
to the structure key = value.

Scenario: Reading and matching the keys and the values of different .properties files
and outputting the results in a glossary

This four-component Job reads two .properties files, one in French and the other in
English. The data in the two input files is mapped to output a glossary matching the
English and French terms.

The two input files used in this scenario hold localization strings for the tMysqlInput component in Talend Studio.

use_case-tfileinputproperties0and6.png

Dropping and linking the components

  1. Drop the following components from the Palette onto the design workspace: tFileInputProperties (x2), tMap, and tLogRow.

  2. Connect the component together using Row >
    Main links. The second properties file,
    FR, is used as a lookup flow.

    Use_Case_tFileInputProperties.png

Configuring the components

  1. Double-click the first tFileInputProperties
    component to open its Basic settings view and
    define its properties.

    Use_Case_tFileInputProperties1.png

  2. In the File Format field, select your file
    format.

  3. In the File Name field, click the three-dot
    button and browse to the input .properties
    file you want to use.

  4. Do the same with the second tFileInputProperties and browse to the French .properties file this time.

    Use_Case_tFileInputProperties2.png

  5. Double-click the tMap component to open the
    tMap editor.

    Use_Case_tFileInputProperties3.png

  6. Select all columns from the English_terms table and drop
    them to the output table.

    Select the key column from the
    English_terms table and drop it to the
    key column in the French_terms
    table.

  7. In the glossary table in the lower right
    corner of the tMap editor, rename the
    value field to EN because it will
    hold the values of the English file.

  8. Click the plus button to add a line to the glossary table and rename it to FR.

  9. In the Length field, set the maximum length
    to 255.

  10. In the upper left corner of the tMap editor,
    select the value column in the
    English_terms table and drop it to the
    FR column in the French_terms
    table. When done, click OK to validate your
    changes and close the map editor and propagate the changes to the next
    component.

Saving and executing the Job

  1. Press Ctrl+S to save your Job.

  2. Press F6 or click the Run button from the Run tab to
    execute it.

    Use_Case_tFileInputProperties4.png

The glossary displays on the console listing three columns holding: the key name in
the first column, the English term in the second, and the corresponding French term in
the third.

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