Embedded AMQP Java Broker

Question

I am trying to create integration test for a Scala / Java application that connects to a RabbitMQ broker. To achieve this I would like an embedded broker that speaks AMQP that I

Answer 1

Here's the solution proposed by OrangeDog adapted to Qpid Broker 7.x, inspired from here:

Add qpid 7.x as test dependecies. In 7.x these have been separated in core + plugins, depending on what you need. For RabbitMQ AMQP version you'll need qpid-broker-plugins-amqp-0-8-protocol and for running in-memory (sufficient for integration tests) use qpid-broker-plugins-memory-store.

pom.xml:

...

    ...
    7.0.2



    ...
    
        org.apache.qpid
        qpid-broker-core
        ${qpid-broker.version}
        test
    
    
        org.apache.qpid
        qpid-broker-plugins-amqp-0-8-protocol
        ${qpid-broker.version}
        test
    
    
        org.apache.qpid
        qpid-broker-plugins-memory-store
        ${qpid-broker.version}
        test
    

...

Add broker configuration with hard-coded user/password and default in-memory virtual host mapped to default port (5672):

qpid-config.json:

{
  "name": "EmbeddedBroker",
  "modelVersion": "7.0",
  "authenticationproviders": [
    {
      "name": "password",
      "type": "Plain",
      "secureOnlyMechanisms": [],
      "users": [{"name": "guest", "password": "guest", "type": "managed"}]
    }
  ],
  "ports": [
    {
      "name": "AMQP",
      "port": "${qpid.amqp_port}",
      "authenticationProvider": "password",
      "virtualhostaliases": [
        {
          "name": "defaultAlias",
          "type": "defaultAlias"
        }
      ]
    }
  ],
  "virtualhostnodes": [
    {
      "name": "default",
      "defaultVirtualHostNode": "true",
      "type": "Memory",
      "virtualHostInitialConfiguration": "{\"type\": \"Memory\" }"
    }
  ]
}

Define junit ExternalResource and declare as ClassRule (or start and close your embedded broker in your IT @BeforeClass and @AfterClass methods):

EmbeddedAMQPBroker.java:

public class EmbeddedAMQPBroker extends ExternalResource {

    private final SystemLauncher broker = new SystemLauncher();

    @Override
    protected void before() throws Throwable {
        startQpidBroker();
        //createExchange();
    }

    @Override
    protected void after() {
        broker.shutdown();
    }

    private void startQpidBroker() throws Exception {
        Map attributes = new HashMap<>();
        attributes.put("type", "Memory");
        attributes.put("initialConfigurationLocation", findResourcePath("qpid-config.json"));
        broker.startup(attributes);
    }

    private String findResourcePath(final String fileName) {
        return EmbeddedAMQPBroker.class.getClassLoader().getResource(fileName).toExternalForm();
    }
}

Integration test:

public class MessagingIT{
    @ClassRule
    public static EmbeddedAMQPBroker embeddedAMQPBroker = new EmbeddedAMQPBroker();

    ...
}