獲取ActiveMQ隊列長度的簡單方法是什麼？

Question

如何使用Java在ActiveMQ中獲取隊列長度（發送到隊列的未使用消息的數量）？

Answer 1

您必須使用JMX，因爲隊列接口不提供此類信息。

檢索特定隊列的大小的實施例

：

// connection 
String url = "service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi"; 
JMXConnector connector = JMXConnectorFactory.connect(new JMXServiceURL(url)); 
MBeanServerConnection connection = connector.getMBeanServerConnection(); 
// get queue size 
ObjectName nameConsumers = new ObjectName("org.apache.activemq:type=Broker,brokerName=localhost,destinationType=Queue,destinationName=myqueue"); 
DestinationViewMBean mbView = MBeanServerInvocationHandler.newProxyInstance(connection, nameConsumers, DestinationViewMBean.class, true); 
long queueSize = mbView.getQueueSize(); 

參考：ActiveMQ JMX，Required MBeans

實施例：managing ActiveMQ with JMX APIs

Answer 2

篩選;

QueueBrowser browser = session.createBrowser(queue); 
Enumeration enu = browser.getEnumeration(); 
List list = new ArrayList();   
    while (enu.hasMoreElements()) { 
    TextMessage message = (TextMessage) enu.nextElement();   
    list.add(message.getText()); 
    } 
System.out.println("Size " + list.size());