Mapping the service structure and displaying the retrieved user information

ESB REST

author
Talend Documentation Team
EnrichVersion
6.4
EnrichProdName
Talend Big Data
Talend Open Studio for Big Data
Talend Open Studio for Data Integration
Talend Data Management Platform
Talend Real-Time Big Data Platform
Talend Data Integration
Talend ESB
Talend Open Studio for ESB
Talend Data Fabric
Talend MDM Platform
Talend Open Studio for MDM
Talend Big Data Platform
Talend Data Services Platform
task
Data Governance > Third-party systems > ESB components > ESB REST components
Data Quality and Preparation > Third-party systems > ESB components > ESB REST components
Design and Development > Third-party systems > ESB components > ESB REST components
EnrichPlatform
Talend Studio

Procedure

  1. Double-click the tXMLMap component to open the Map Editor.
  2. If you selected XML in the Accept Type list of the tRESTClient component, define the input XML tree structure according to the service structure.
    1. In the input table, right-click the default root node of the body column, select Rename from the contextual menu, and rename it to users.
    2. Right-click the users node, select Create Sub-Element from the contextual menu, and create sub-element named user. Set user as the loop element because the XML structure of the Web service to be invoked is looped on this element.
    3. Right-click the user node, select Create Attribute from the contextual menu, and enter id in the [Create New Attribute] dialog box to create an attribute named id for the user node.
    4. Right-click the user node again, select Create Sub-Element from the contextual menu, and enter first_name in the [Create New Element] dialog box to create an sub-element named first_name for the user node.
      Repeat this operation to create another sub-element under the user node, last_name.
    5. Drop the id, first_name and last_name columns from the input table to the output table, and then click OK to validate the mapping and close the Map Editor.

    If you selected JSON in the Accept Type list of the tRESTClient component, the response from the server end will be sent back in JSON format and converted to document type. In this example, the converted response structure looks like the following:

    <root>
        <users>
            <user>
                <id>2</id>
                <first_name>Theodore</first_name>
                <last_name>Harding</last_name>
            </user>
        </users>
    </root>

    Note that the <root> element is removed if the Wrap JSON Response check box is cleared in the Advanced settings of the tRESTClient component.

    Define the input XML tree structure accordingly and map it with the output data flow in a similar manner as described above.

  3. Double-click the tLogRow component to open its Basic settings view.
  4. Click the Sync columns button to make sure the component schema is synchronized with the output schema of the tXMLMap component.
  5. In the Mode field, select the Table option to display the GET result in table cells.