rabbitmq-datadog-jmx-system-metrics.java

MeterRegistry jmxRegistry = new JmxMeterRegistry(JmxConfig.DEFAULT, Clock.SYSTEM);
// JVM and system metrics:
new ClassLoaderMetrics().bindTo(jmxRegistry);
new JvmMemoryMetrics().bindTo(jmxRegistry);
new JvmGcMetrics().bindTo(jmxRegistry);
new ProcessorMetrics().bindTo(jmxRegistry);
new JvmThreadMetrics().bindTo(jmxRegistry);
ConnectionFactory connectionFactory = new ConnectionFactory();
MicrometerMetricsCollector metricsCollector = new MicrometerMetricsCollector(
    jmxRegistry, "rabbitmq.client"
);
connectionFactory.setMetricsCollector(metricsCollector);

Connection connection = connectionFactory.newConnection();
Channel channel = connection.createChannel();
String queue = channel.queueDeclare().getQueue();
channel.basicConsume(queue, true, (ctag, msg) -> { }, (ctag) -> { });
executor.submit(() -> {
    Random random = new Random();
    while (true) {
        Thread.sleep(random.nextInt(100));
        channel.basicPublish("", queue, null, "".getBytes());
    }
});