Camunda 8.5 access Spring Boot application.properties

[Alex3]

I have implemented a simple Camunda Connector:

@OutboundConnector(
name = “MYCONNECTOR”,
inputVariables = {
“entityName”},
type = “io.camunda:my-connector:1”)
public class MyConnectorFunction implements OutboundConnectorFunction {

@Value("${some.text.var}")
private String someTextVar;

@Override
public Object execute(OutboundConnectorContext context) {
    try {
        final var connectorRequest = context.bindVariables(MyConnectorRequest.class);
        return "Hello, World: " + someTextVar;
    } catch (Exception e) {
        LOGGER.error(e.getMessage(), e);
        throw new RuntimeException(e);
    }
}

}

I created a JSON template for it, connected it to Camunda Modeler, built and deployed the JAR of this connector in Docker using docker-compose in the connectors image.

I also added an application.properties file to my connector project and defined a property there:

some.text.var=Some Test Var1

As you can see from the code above, I am trying to access this property, but it is always null. Is there any mechanism to access Spring properties from a connector, or some way to view the Spring context?

[sbuettner]

Hey @Alex3, your connector would need to be on your component scanning path where Spring looks for components. You could then for example inject Springs Environment bean.

Here is an example for a Spring Based Connector Test: connectors/connector-runtime/spring-boot-starter-camunda-connectors/src/test/java/io/camunda/connector/runtime/outbound/SpringBasedOutboundConnectorTest.java at aa994e1ef536054a7ef3a4feb50ae37a0006adf1 · camunda/connectors · GitHub

[Alex3]

Hey @sbuettner , thanks for your answer.

I deploy my connector using Docker Compose as part of the connectors bundle. I added a volume like this:

connectors: # https://docs.camunda.io/docs/components/integration-framework/connectors/out-of-the-box-connectors/available-connectors-overview/
image: camunda/connectors-bundle:${CAMUNDA_CONNECTORS_VERSION}
container_name: connectors
ports:
- “8085:8080”
environment:
- ZEEBE_CLIENT_BROKER_GATEWAY-ADDRESS=zeebe:26500
- ZEEBE_CLIENT_SECURITY_PLAINTEXT=true
- ZEEBE_CLIENT_ID=${ZEEBE_CLIENT_ID}
…
volumes:

  - myconnector.jar:/opt/app/my-connector.jar

How can I activate my connector with this setup so that it becomes part of Spring and is included in ComponentScan?

[sbuettner]

We have not tried this but in theory you could provide an environment variable to the Connector Runtime that includes your package in the component scan if Spring allows that.