process-service-calls-quarkus

Process Service invocation

Description

A quickstart project that processes travellers in the system. It's main purpose is to illustrate local service invocation.

This example shows

• invoking local service class that is a injectable bean

• control flow based on service calls

• New Travelers Diagram

• New Travelers Diagram Properties

• New Travelers Diagram Properties

• Store Traveler Service Call

• Store Traveler Service Call

• Store Traveler Service Call

• Stored Traveler Gateway Yes Connector

• Stored Traveler Gateway No Connector

• Greet New Traveler Service Call

• Greet New Traveler Service Call

• Audit Traveler Service Call

• Audit Traveler Service Call

• Multi Params Process

• Multi Params Diagram Properties

• Multi Params Diagram Properties

• Hello Service Calls

• Hello Service Calls

Build and run

Prerequisites

You will need:

• Java 17+ installed
• Environment variable JAVA_HOME set accordingly
• Maven 3.9.6+ installed

When using native image compilation, you will also need:

• GraalVM 19.1+ installed
• Environment variable GRAALVM_HOME set accordingly
• Note that GraalVM native image compilation typically requires other packages (glibc-devel, zlib-devel and gcc) to be installed too, please refer to GraalVM installation documentation for more details.

Compile and Run in Local Dev Mode

mvn clean compile quarkus:dev

NOTE: With dev mode of Quarkus you can take advantage of hot reload for business assets like processes, rules, decision tables and java code. No need to redeploy or restart your running application.

Package and Run in JVM mode

mvn clean package
java -jar target/quarkus-app/quarkus-run.jar

or on windows

mvn clean package
java -jar target\quarkus-app\quarkus-run.jar

Package and Run using Local Native Image

Note that the following configuration property needs to be added to application.properties in order to enable automatic registration of META-INF/services entries required by the workflow engine:

quarkus.native.auto-service-loader-registration=true

Note that this requires GRAALVM_HOME to point to a valid GraalVM installation

mvn clean package -Pnative

To run the generated native executable, generated in target/, execute

./target/process-service-calls-quarkus-runner

OpenAPI (Swagger) documentation

Specification at swagger.io

You can take a look at the OpenAPI definition - automatically generated and included in this service - to determine all available operations exposed by this service. For easy readability you can visualize the OpenAPI definition file using a UI tool like for example available Swagger UI.

In addition, various clients to interact with this service can be easily generated using this OpenAPI definition.

When running in either Quarkus Development or Native mode, we also leverage the Quarkus OpenAPI extension that exposes Swagger UI that you can use to look at available REST endpoints and send test requests.

Submit a traveller

To make use of this application it is as simple as putting a sending request to http://localhost:8080/travellers with following content

{
"traveller" : {
  "firstName" : "John",
  "lastName" : "Doe",
  "email" : "[email protected]",
  "nationality" : "American",
  "address" : {
  	"street" : "main street",
  	"city" : "Boston",
  	"zipCode" : "10005",
  	"country" : "US" }
  }
}

Complete curl command can be found below:

curl -X POST -H 'Content-Type:application/json' -H 'Accept:application/json' -d '{"traveller" : { "firstName" : "John", "lastName" : "Doe", "email" : "[email protected]", "nationality" : "American","address" : { "street" : "main street", "city" : "Boston", "zipCode" : "10005", "country" : "US" }}}' http://localhost:8080/travellers

After the above command you should see a log similar to the following

Calling a Simple Hello Service

To call Hello Service send a request to http://localhost:8080/multiparams with following content

{
  "name" : "John",
  "age" : 44,
}

Complete curl command can be found below:

curl -X POST -H 'Content-Type:application/json' -H 'Accept:application/json' -d '{"name" : "John", "age" : 44}' http://localhost:8080/multiparams

After the above command you should see a log similar to the following