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目前我已開始使用JMS主題與ActiveMQ。我有創建發佈者和持久訂閱者通過JAVA代碼(下面提到),我也收到訂閱方的消息。JMS主題發佈/訂閱者
Publisher.Java
public static void createConnectionAndSendMessage(String ipAddress)
{
try
{
ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://"+ipAddress+":61617");
Connection connection = factory.createConnection();
connection.start();
Session topicSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Topic topic = topicSession.createTopic("Test-Topic");
MessageProducer producer = topicSession.createProducer(topic);
producer.setDeliveryMode(DeliveryMode.PERSISTENT);
ObjectMessage message = topicSession.createObjectMessage();
TopicTO topicTO = new TopicTO();
topicTO.setId(i);
topicTO.setName("Sample");
message.setStringProperty("s_id", "Sample");
message.setObject((Serializable) topicTO);
producer.send(message);
System.out.println("message sent successfully");
}
}
catch(JMSException e)
{
System.out.println("error :" + e);
}
}
Subscriber.java
public void createConnectionAndReceiveMessage(String clientId, String ipAddress)
{
try
{
ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://"+ipAddress+":61617");
Connection connection = connectionFactory.createConnection();
connection.setClientID(clientId);
connection.start();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Topic topic = session.createTopic("Test-Topic");
String selector = "s_id = 'Sample'";
System.out.println("selector : '"+selector+"'....");
TopicSubscriber consumer = session.createDurableSubscriber(topic, "Sub1", selector, true);
consumer.setMessageListener(new TopicMessageListener());
}
catch(Exception e)
{
System.out.println("error :" + e);
}
}
我有些疑惑的主題那些如下,
如何可能我檢查多少訂戶積極尋找主題中使用Java JMS的消息?
如何從主題中獲得那些活動的持久訂閱者列表?
我們是否有任何選項可以刪除主題中發佈的消息?
在這些背景下幫助我。
在此先感謝。