ActiveMQ: Get list of connections through JMX?

Question

How do I get the list of the connections to the OpenWire connector of ActiveMQ? JConsole is able to list the connections, but I don't see which "view" I can use to get the list:

Example ObjectName of a connection: org.apache.activemq:BrokerName=localhost,Type=Connection,ConnectorName=openwire,Connection=toto

I tried "ConnectorViewMBean", but the operations on it don't allow me to list the connections:

ObjectName name = new ObjectName("org.apache.activemq:BrokerName=localhost,Type=Connection,ConnectorName=openwire"); 
mbsc.getMBeanInfo(name); 
ConnectorViewMBean view = JMX.newMBeanProxy(mbsc, name, ConnectorViewMBean.class);

Antimissile

Answer 1

The solution was the usage of an expression:

ObjectName connectionNames = 
      new ObjectName("org.apache.activemq:BrokerName=localhost," + 
                     "Type=Connection,ConnectorName=openwire,Connection=*");

Set<ObjectName> names = mbsc.queryNames(connectionNames, null); 
for(ObjectName name : names) { 
   logger.error("Name: "+name.getCanonicalName()); 
} 

Antimissile

Can anyone tell me how to format code correctly?? SHIFT + ENTER creates a new block code, ENTER too ... – Antimissile

see stackoverflow.com/editing-help or use the toolbar buttons in the editor – Trabue

This answer is correct for ActiveMQ 5.7.0 and before. The format of the ObjectName changed in ActiveMQ 5.8.0, as documented in the 5.8.0 release notes. – Conflict

Answer 2

I'm using ActiveMQ 5.14.5, which uses a different ObjectName format for querying connections via JMX. The equivalent to Andrew's answer in this version of ActiveMQ is:

final JMXServiceURL url       = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi");
final JMXConnector  connector = JMXConnectorFactory.connect(url, null);
connector.connect();

final ObjectName connectionName = new ObjectName(
    "org.apache.activemq:type=Broker," +
    "brokerName=localhost,"            +
    "connector=clientConnectors,"      +
    "connectorName=openwire,"          +
    "connectionViewType=clientId,"     +
    "connectionName=*"
);

final MBeanServerConnection mbsc  = connector.getMBeanServerConnection();
final Set<ObjectName>       names = mbsc.queryNames(connectionName, null);
for (final ObjectName name : names) {
    System.out.println(name.getCanonicalName());
}

Bare

Answer 3

In the most recent versions of ActiveMQ (5.1x.x), you can use the BrokerViewMBean to get a map of transport connectors:

Map<String, String[]> env = new HashMap<>();
String[] creds = {brokerUsername, brokerPassword};
env.put(JMXConnector.CREDENTIALS, creds);

final String managementURL = "service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi";
try (JMXConnector connector = JMXConnectorFactory.connect(new JMXServiceURL(managementURL, env)) {
   ObjectName on = new ObjectName("org.apache.activemq:type=Broker,brokerName=localhost");
   BrokerViewMBean broker = MBeanServerInvocationHandler.newProxyInstance(connector.getMBeanServerConnection(), on, BrokerViewMBean.class, false);
   Map<String, String> transportConnectors = broker.getTransportConnectors();
   // broker.getTransportConnectorsByType("tcp"); // openwire
   // broker.addConnector(String discoveryAddress);
   // broker.removeConnector(String connectorName);
 } catch (MalformedObjectNameException ex) {
    // log error
 } catch (IOException ex) {
    // log error
 } catch (Exception ex) {
    // log error
 }

Check also out ConnectorViewMBean.

However, while there are methods in BrokerViewMBean to get transport connectors, as demonstrated in the above code, there aren't any to get a list of network (a.k.a. broker-to-broker) connectors.

Bionomics