ReqRes Connector Example

A Camunda 8 example connector working with https://reqres.in/

• Element Template
• POM (artifact name, id, description)
• Connector Function
• Service Provider Interface (SPI)

Read more about creating Connectors

Check out the Connectors SDK

Build

You can package the Connector by running:

mvn clean package

This will create the following artifacts:

• A thin JAR without dependencies.
• An fat JAR containing all dependencies, potentially shaded to avoid classpath conflicts. This will not include the SDK artifacts since those are in scope provided and will be brought along by the respective Connector Runtime executing the Connector.

Shading dependencies

You can use the maven-shade-plugin defined in the Maven configuration to relocate common dependencies that are used in other Connectors and the Connector Runtime. This helps to avoid classpath conflicts when the Connector is executed.

Use the relocations configuration in the Maven Shade plugin to define the dependencies that should be shaded. The Maven Shade documentation provides more details on relocations.

API

Input

Name	Description	Example	Notes
page	controll page number to fetch	2	Affects which entries will be returned
per_page	Controll how many entries will be retruned per page	3	Affcets the numbe rof entries on a page and the result set size

Output

"Response received: " + http response body

Response Body:

{"page":2,"per_page":3,"total":12,"total_pages":4,"data":[{"id":4,"email":"eve.holt@reqres.in","first_name":"Eve","last_name":"Holt","avatar":"https://reqres.in/img/faces/4-image.jpg"},{"id":5,"email":"charles.morris@reqres.in","first_name":"Charles","last_name":"Morris","avatar":"https://reqres.in/img/faces/5-image.jpg"},{"id":6,"email":"tracey.ramos@reqres.in","first_name":"Tracey","last_name":"Ramos","avatar":"https://reqres.in/img/faces/6-image.jpg"}],"support":{"url":"https://reqres.in/#support-heading","text":"To keep ReqRes free, contributions towards server costs are appreciated!"}}

Error codes

Code	Description
FAIL	returns errro message of errro caught

Test locally

Run unit tests

mvn clean verify

Test with local runtime

Use the Camunda Connector Runtime to run your function as a local Java application.

In your IDE you can also simply navigate to the LocalContainerRuntime class in test scope and run it via your IDE. If necessary, you can adjust application.properties in test scope.

Element Template

The element template for this sample connector is generated automatically based on the connector input class using the Element Template Generator. The generation is embedded in the Maven build and can be triggered by running mvn clean package.

It is not mandatory to generate the element template for your connector and you can also create it manually. However, the generator provides a convenient way to create the template and keep it in sync with the connector input class and empowers you to prototype and iterate quickly.

The generated element template can be found in element-templates/req-res-connector.json.