To start an embedded ActiveMQ broker inside a Netty project

• To start an embedded ActiveMQ broker inside a Netty project, you can use the BrokerService class provided by the ActiveMQ library. Here are the steps to do this:

    org.apache.activemq
    activemq-broker
    5.16.2

Make sure to replace the version number with the latest version of ActiveMQ.

• Create an instance of BrokerService:

BrokerService broker = new BrokerService();

• Configure the broker as needed. For example, you can set the broker name, the data directory, and any additional broker configuration options:

broker.setBrokerName("myBroker");
broker.setDataDirectory("target/data");
// Add any additional configuration options here.

• Start the broker:

broker.start();

This will start the embedded ActiveMQ broker.

• You can now use the broker to send and receive messages using JMS APIs. For example, you can create a ConnectionFactory and a Queue object:

ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("vm://myBroker?create=false");
Queue queue = new ActiveMQQueue("myQueue");

In this example, the vm:// transport is used to connect to the embedded broker. The create=false parameter ensures that the broker is not created again if it already exists.

• You can then create a JMS Connection and Session object, and send/receive messages using JMS APIs:

Connection connection = connectionFactory.createConnection();
connection.start();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = session.createProducer(queue);
TextMessage message = session.createTextMessage("Hello, world!");
producer.send(message);

This code creates a connection, starts it, creates a session, a producer, and a text message, and sends the message to the queue.

• When you're done, stop the broker:

broker.stop();

This will stop the embedded ActiveMQ broker.

Note that you can also configure the embedded broker to use different transport protocols, such as TCP, by using the addConnector method of the BrokerService class. For example, you can add a TCP connector by calling:

broker.addConnector("tcp://localhost:61616");

This will add a TCP connector on port 61616.