README.md

Groovy component

This component for the elastic.io platform may be used to execute an arbitrary Groovy code inside your integration flow.

Available Variables

Here the list of the available variables within the context of execution.

Elastic.io Specific Functionality

• parameters - an instance of ExecutionParameters used to access the incoming message, step's configuration, step's snapshot or an instance of EventEmitter.
• logger - an instance of org.slf4j.Logger used to log inside the component

Available Libraries

Here is the list of available libraries within the context of execution.

• The JAX-RS client API

Emitting an empty object

The following code creates an empty Message to be sent to the next step in the integration flow.

new Message.Builder().build()

Emitting multiple messages

The following code emits two messages.

1.upto(2) {
    def body = Json.createObjectBuilder().add("id", "${it}").build()
    def msg = new Message.Builder().body(body).build()
    parameters.getEventEmitter().emitData(msg);
} 

Calling an external REST API

The following code sends a request to an external REST API using The JAX-RS client API. The response is packed into a Message and emitted.

def token = "${System.getenv('ELASTICIO_API_USERNAME')}:${System.getenv('ELASTICIO_API_KEY')}"
JsonObject result = ClientBuilder.newClient()
    .target('http://localhost:12345')
    .path('v1/objects/1')
    .request(MediaType.APPLICATION_JSON_TYPE)
    .header("Authorization", "Basic " + Base64.getEncoder().encodeToString(token.getBytes("UTF-8")))
    .get(JsonObject.class)
                
new Message.Builder().body(result).build()