August 17, 2023

tRouteOutput – Docs for ESB 5.x

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tRouteOutput

tRouteOutput_icon32_white.png

tRouteOutput properties

Warning

This component is available only to users of Talend Studio with ESB.

Component family

ESB/Route

  

Function

tRouteOutput sends messages from
a Job to a Route.

Purpose

tRouteOutput allows you to
exchange messages between a Data Integration Job and a Mediation
Route.

Basic settings

Output 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.

Click Edit schema to make changes to the schema. If the
current schema is of the Repository type, three options are
available:

  • View schema: choose this option to view the
    schema only.

  • Change to built-in property: choose this option
    to change the schema to Built-in for local
    changes.

  • Update repository connection: choose this option to change
    the schema stored in the repository and decide whether to propagate the changes to
    all the Jobs upon completion. If you just want to propagate the changes to the
    current Job, you can select No upon completion and
    choose this schema metadata again in the [Repository
    Content]     window.

Click Sync columns to retrieve
the schema from the previous component connected in the Job.

 

 

Built-in: No property data stored
centrally.

 

 

Repository: Select the Repository
file where Properties are stored.

 

Camel

Enter the message parameters corresponding to the columns you
defined in the schema dialog box via the Edit
schema button.

 

Type

Select between:

Body: Used to set the body of a
Route, equals the code
exchange.getOut().setBody(…).

Property: Used to set the
property of a Route, equals the code
exchange.setProperty(name, value).

System: Used to set the system
property, equals the code System.setProperty(name,
value).

Header: Used the set the output
header, equals the code exchange.getOut().setHeader(name,
value).

 

Name

This column is used to set the name for the parameter when its
type is either Property, System or Header. This column is ignored when the type is
Body.
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 can be used as the end component and thus requires
an input component.

Limitation

The Job using a tRouteOutput
must be launched only within a Route using the cTalendJob component.

Scenario: Getting messages from tRouteOutput

This scenario describes how to send messages from a Job to a Route using the tRouteOutput component. To do this, we need to build a Job to
send the message and then create a Route using the cTalendJob component to call the Job and receive the message.

For more information about how to use the Mediation components, see Talend ESB Mediation Components Reference Guide.

Creating an Data Integration Job

In this section, we will build a Job named RouteCommunication
to send the message to a Route.

Dropping and linking the components
use_case_trouteoutput1.png

  1. Drag and drop a tFixedFlowInput and a
    tRouteOutput from the Palette onto the design workspace.

  2. Right-click the tFixedFlowInput
    component, select Row > Main from the contextual menu and click the
    tRouteOutput component.

Configuring the components

  1. Double-click the tFixedFlowInput
    component to open its Basic settings
    view in the Component tab.

    use_case_trouteoutput2.png

  2. Click the three-dot button next to Edit
    Schema    . In the schema dialog box, click the plus button
    to add a new line of String type and
    name it body. Click OK to close the dialog box.

    use_case_trouteoutput3.png

  3. In the Number of rows field, set the
    number of rows as 1.

  4. In the Mode area, select Use Single Table and input the following
    request in double quotation marks into the Value field:

    Hello from Talend Job!

  5. Double-click the tRouteOutput
    component to display its Basic settings
    view in the Component tab.

    use_case_trouteoutput4.png

  6. Make sure that tRouteOutput has one
    element body. Set its type to Body.

  7. Press Ctrl+S to save your Job.

Creating a Mediation Route

In this section, we will switch to the Mediation
perspective and create a Route to receive the message sent from the Job.

Dropping and linking the components
use_case_trouteoutput5.png

  1. Drag and drop a cMessagingEndpoint, a
    cTalendJob, and a cLog component from the Palette onto the design workspace.

  2. Link the components with the Row >
    Route connection as shown
    above.

  3. Label the components for better identification of their roles.

Configuring the components

  1. Double-click the cMessagingEndpoint
    component to open its Basic settings
    view in the Component tab.

    use_case_trouteoutput6.png

  2. In the URI field, enter
    "timer://myTimer?period=2000" to start message
    exchanges every 2000 milliseconds.

  3. Double-click the cTalendJob component
    to display its Basic settings view in
    the Component tab.

    use_case_trouteoutput7.png

  4. Select Job RouteCommunication from the
    repository.

  5. The cLog component will monitor the
    message exchanges and does not need any configuration.

  6. Press Ctrl+S to save your
    Route.

Executing the Route

Click the Run view to display it and click
the Run button to launch the execution of your
Route. You can also press F6 to execute it. In
the execution log you will see:

use_case_trouteoutput8.png
Document get from Talend https://help.talend.com
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Docs 5.x
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