请帮忙。这让我伤心了两个星期。
我只想要一个简单的独立Java客户端，它将JMS消息发送到在localhost上运行的glassfish服务器上的JMS队列。并收到它。我似乎无法使这项工作。代码如下。接下来是我从Eclipse工作台运行时获得的控制台输出。
邮件发送时没有错误。 （参见Console中的最后一行）但是监听器从不检索它。谁能帮忙。对于下一个尝试精简JMS的人来说，这真的是一个很好的例子 - 如果它有用的话。有人可以提供帮助吗？
[注意：我使用了大量的print语句来生成下面的控制台输出，但为了便于阅读，我将它们从代码中删除了。我在运行之前清空了glassfish服务器日志。运行后，日志没有添加任何行。]
代码：
public class JMSTest implements MessageListener {
public static void main(String[] args) {
JMSTest messageCenter = new JMSTest ();
messageCenter.sendMessage();
}
static final Properties JNDI_PROPERTIES = new Properties() {
private static final long serialVersionUID = 1L;
{this.put ("java.naming.factory.initial", "com.sun.jndi.fscontext.RefFSContextFactory");
this.put ("java.naming.provider.url","file:///C:/glassfish4/mq/opt/java/my_broker");
}
};
String QUEUE_NAME = "jms/JMSSendToTestQueue";
MessageConsumer msgConsumer = null;
MessageProducer msgProducer = null;
ObjectMessage msg = null;
Connection connection = null;
//constructor
public JMSTest () {
try {
/*1*/ Context jndiContext = (Context) new InitialContext(JNDI_PROPERTIES);
/*2*/ ConnectionFactory factory = (ConnectionFactory) jndiContext.lookup("jms/goConnectionFactory");
/*3*/ connection = factory.createConnection();
/*4*/ Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
/*5*/ Destination receiveFromDestination = (Destination) jndiContext.lookup(QUEUE_NAME);
/*6*/ this.msgConsumer = session.createConsumer(receiveFromDestination);
/*7*/ this.msgConsumer.setMessageListener(this);
/*8*/ Destination sendToDestination = (Destination) jndiContext.lookup(QUEUE_NAME);
/*9*/ msgProducer = session.createProducer(sendToDestination);
/*10*/this.msg = session.createObjectMessage();
this.msg.setObject("Hi There. I'm a Test Object.");
} catch (Exception e) {
System.out.println(" " + iAmM + "msg: " + e.getMessage());
e.printStackTrace();
}
}
public void sendMessage() {
try {
this.msgProducer.send(this.msg);
System.out.println("Message Was Sent");
} catch (JMSException e) {
System.out.println("Attempt to send message failed.");
e.printStackTrace();
}
}
public void onMessage(Message msg) {
System.out.println("TEST MESSAGE RECEIVED");
if(this.connection!=null) {
try {
this.connection.close();
} catch (Exception e) {
e.printStackTrace();
}
}
try {
ObjectMessage objMsg = (ObjectMessage) msg;
System.out.println((String) objMsg.getObject());
} catch (JMSException e) {
e.printStackTrace();
}
}
控制台：
JMSTest.<init> () beg
Line 1: InitialContext ok:
javax.naming.InitialContext@3b9a45b3
Line 2: factory is not null:
Sun Java System MQ ConnectionFactory
Class: com.sun.messaging.ConnectionFactory
getVERSION(): 3.0
isReadonly(): true
getProperties():
imqOverrideJMSPriority = false
imqConsumerFlowLimit = 1000
imqOverrideJMSExpiration = false
imqAddressListIterations = 1
imqLoadMaxToServerSession = true
imqConnectionType = TCP
imqPingInterval = 30
imqSetJMSXUserID = false
imqConfiguredClientID =
imqSSLProviderClassname = com.sun.net.ssl.internal.ssl.Provider
imqJMSDeliveryMode = PERSISTENT
imqConnectionFlowLimit = 1000
imqConnectionURL = http://localhost/imq/tunnel
imqBrokerServiceName =
imqJMSPriority = 4
imqBrokerHostName = localhost
imqJMSExpiration = 0
imqAckOnProduce =
imqEnableSharedClientID = false
imqAckTimeout = 0
imqAckOnAcknowledge =
imqConsumerFlowThreshold = 50
imqDefaultPassword = guest
imqQueueBrowserMaxMessagesPerRetrieve = 1000
imqDefaultUsername = guest
imqReconnectEnabled = false
imqConnectionFlowCount = 100
imqAddressListBehavior = PRIORITY
imqReconnectAttempts = 0
imqSetJMSXAppID = false
imqConnectionHandler = com.sun.messaging.jmq.jmsclient.protocol.tcp.TCPStreamHandler
imqSetJMSXRcvTimestamp = false
imqBrokerServicePort = 0
imqDisableSetClientID = false
imqSetJMSXConsumerTXID = false
imqOverrideJMSDeliveryMode = false
imqBrokerHostPort = 7676
imqQueueBrowserRetrieveTimeout = 60000
imqSetJMSXProducerTXID = false
imqSSLIsHostTrusted = false
imqConnectionFlowLimitEnabled = false
imqReconnectInterval = 3000
imqAddressList =
imqOverrideJMSHeadersToTemporaryDestinations=false}
JMSTest.<init> () Line 3: connection is not null:
BrokerAddress=localhost:7676(60325)
ConnectionID=967799204788496640
ReconnectEnabled: false
IsConnectedToHABroker: false
JMSTest.<init> () Line 4: session is not null:
ConnectionID = 967799204788496640
SessionID = 967799204788508160
JMSTest.<init> () Line 5: receiveFromDestination not null:
Sun Java System MQ Destination
getName(): JMSSendToTestQueue
Class: com.sun.messaging.Queue
getVERSION(): 3.0
isReadonly(): false
getProperties():
imqDestinationName = JMSSendToTestQueue
imqDestinationDescription = A Description for the Destination Object}
JMSTest.<init> () Line : msgConsumer not null:
ConnectionID = 967799204788496640
SessionID = 967799204788508160
ConsumerID = 967799204788511232
DestName = JMSSendToTestQueue
JMSTest.<init> () Line 7: listener set to this:
JMSTest.<init> () Line 8: sendToDestination not null:
Sun Java System MQ Destination
getName(): JMSSendToTestQueue
Class: com.sun.messaging.Queue
getVERSION(): 3.0
isReadonly(): false
getProperties():
imqDestinationName = JMSSendToTestQueue
imqDestinationDescription = A Description for the Destination Object}
JMSTest.<init> () Line : msgProducer not null:
ConnectionID = 967799204788496640
SessionID = 967799204788508160
ProducerID = 967799204788513792
DestName = JMSSendToTestQueue
JMSTest.<init> () Line 10: ObjectMessage created.
Object is String: Hi There. I'm a Test Object.
Message Was Sent
答案 0 :(得分：2)
您需要在连接上调用start（），以便MessageConsumer可以调度消息开始。您可以在不启动连接的情况下发送消息，但在启动之前无法接收任何消息。