1.)從.net客戶端,我如何測試客戶端是否連接到服務器(即可以發送和接收)是的,我可以在try塊中發送消息並捕獲隨後的異常,但我希望能有一個更優雅的解決方案。如何獲得Websphere MQ連接狀態,以及如何重置連接:
2)如何打開,關閉和重新打開連接?在我試圖解決上面的問題1時,我發現如果我打開一個連接,然後調用connection.Close()我無法從連接工廠獲得另一個連接(請參閱下面的代碼片段)。我收到錯誤消息XMSCC0008
我正在使用非常標準的vanilla MQ配置。以下是我的客戶端如何連接:
ISession session = MQAccess.GetSession(MQAccess.Connection);
IDestination destination = session.CreateTopic(SubTopicName);
Consumer = MQAccess.GetConsumer(session, destination);
Consumer.MessageListener = new MessageListener(HandleMQSubEvent);
MQAccess.Connection.Start();
其中MQAccess是一個小工具類。
編輯的問題補充MQAccess代碼:
public static class MQAccess
{
public static readonly MQConfigurationSectionHandler ConfigSettings;
public static readonly IConnectionFactory ConnectionFactory;
private static readonly IConnection connection;
public static IConnection Connection
{
get { return connection; }
}
static MQAccess()
{
ConfigSettings = (MQConfigurationSectionHandler)
ConfigurationManager.GetSection("mq-configuration");
XMSFactoryFactory factory = XMSFactoryFactory.GetInstance(XMSC.CT_WMQ);
ConnectionFactory = factory.CreateConnectionFactory();
ConnectionFactory.SetStringProperty(XMSC.WMQ_HOST_NAME, ConfigSettings.Hostname);
ConnectionFactory.SetIntProperty(XMSC.WMQ_PORT, ConfigSettings.Port);
ConnectionFactory.SetStringProperty(XMSC.WMQ_CHANNEL, ConfigSettings.Channel);
if (ConfigSettings.QueueManager == string.Empty)
{
ConnectionFactory.SetStringProperty(XMSC.WMQ_QUEUE_MANAGER, "");
}
else
{
ConnectionFactory.SetStringProperty(XMSC.WMQ_QUEUE_MANAGER, ConfigSettings.QueueManager);
}
connection = GetConnection();
}
public static IConnection GetConnection()
{
return ConnectionFactory.CreateConnection();
}
public static ISession GetSession(IConnection connection)
{
return connection.CreateSession(false, AcknowledgeMode.AutoAcknowledge);
}
public static IMessageProducer GetProducer(ISession session, IDestination destination)
{
return session.CreateProducer(destination);
}
public static IMessageConsumer GetConsumer(ISession session, IDestination destination)
{
return session.CreateConsumer(destination);
}
public static void MQPub(string TopicURI, string message)
{
using (var session = GetSession(Connection))
{
using (var destination = session.CreateTopic(TopicURI))
{
using (var producer = GetProducer(session, destination))
{
producer.Send(session.CreateTextMessage(message));
}
}
}
}
public static void MQPub(string TopicURI, IEnumerable<string> messages)
{
using (var session = GetSession(Connection))
{
using (var destination = session.CreateTopic(TopicURI))
{
using (var producer = GetProducer(session, destination))
{
foreach (var message in messages)
{
producer.Send(session.CreateTextMessage(message));
}
}
}
}
}
}
編輯:重命名MQAccess類MQClient。根據T Rob的建議,將它作爲實例類。 Disconnect方法仍與上述
public class MQClient : IDisposable
{
public MQConfigurationSectionHandler ConfigSettings { get; private set; }
public IConnectionFactory ConnectionFactory { get; private set; }
public IConnection Connection { get; private set; }
public IMessageConsumer Consumer { get; private set; }
public IMessageProducer Producer { get; private set; }
// Save sessions as fields for disposing and future subscription functionality
private ISession ProducerSession;
private ISession ConsumerSession;
public string SubTopicName { get; private set; }
public string PubTopicName { get; private set; }
public bool IsConnected { get; private set; }
public event Action<Exception> ConnectionError;
private Action<IMessage> IncomingMessageHandler;
public MQClient(string subTopicName, string pubTopicName, Action<IMessage> incomingMessageHandler)
{
// Dont put connect logic in the constructor. If we lose the connection we may need to connect again.
SubTopicName = subTopicName;
PubTopicName = pubTopicName;
IncomingMessageHandler = incomingMessageHandler;
}
public string Connect()
{
IsConnected = false;
string errorMsg = string.Empty;
ConfigSettings = (MQConfigurationSectionHandler)
ConfigurationManager.GetSection("mq-configuration");
XMSFactoryFactory factory = XMSFactoryFactory.GetInstance(XMSC.CT_WMQ);
ConnectionFactory = factory.CreateConnectionFactory();
ConnectionFactory.SetStringProperty(XMSC.WMQ_HOST_NAME, ConfigSettings.Hostname);
ConnectionFactory.SetIntProperty(XMSC.WMQ_PORT, ConfigSettings.Port);
ConnectionFactory.SetStringProperty(XMSC.WMQ_CHANNEL, ConfigSettings.Channel);
if (ConfigSettings.QueueManager == string.Empty)
ConnectionFactory.SetStringProperty(XMSC.WMQ_QUEUE_MANAGER, "");
else
ConnectionFactory.SetStringProperty(XMSC.WMQ_QUEUE_MANAGER, ConfigSettings.QueueManager);
Connection = ConnectionFactory.CreateConnection();
if (!string.IsNullOrEmpty(PubTopicName))
{
ProducerSession = Connection.CreateSession(false, AcknowledgeMode.AutoAcknowledge);
Producer = ProducerSession.CreateProducer(ProducerSession.CreateTopic(PubTopicName));
}
if (!string.IsNullOrEmpty(SubTopicName) && IncomingMessageHandler != null)
{
ConsumerSession = Connection.CreateSession(false, AcknowledgeMode.AutoAcknowledge);
Consumer = ConsumerSession.CreateConsumer(ConsumerSession.CreateTopic(SubTopicName));
Consumer.MessageListener = new MessageListener(IncomingMessageHandler);
}
try
{
Connection.Start();
Connection.ExceptionListener = new ExceptionListener(ConnectionExceptionHandler);
IsConnected = true;
}
catch (TypeInitializationException ex)
{
errorMsg = "A TypeInitializationException error occured while attempting to connect to MQ. Check the Queue configuration in App.config. The error message is: " + ex.Message;
}
catch (IllegalStateException ex)
{
errorMsg = "An IllegalStateException error occured while attempting to connect to MQ. Check the Queue configuration in App.config. The error message is: " + ex.Message;
}
return errorMsg;
}
public void Disconnect()
{
if (Producer != null)
{
Producer.Close();
Producer.Dispose();
Producer = null;
}
if (ProducerSession != null)
{
// Call Unsubscribe here if subscription is durable
ProducerSession.Close();
ProducerSession.Dispose();
ProducerSession = null;
}
if (Connection != null)
{
Connection.Stop();
//if (Connection.ExceptionListener != null)
// Connection.ExceptionListener = null;
// Per Shashi............
//if (Consumer.MessageListener != null)
// Consumer.MessageListener = null;
Connection.Close();
Connection.Dispose();
Connection = null;
}
if (Consumer != null)
{
if (Consumer.MessageListener != null)
Consumer.MessageListener = null;
Consumer.Close();
Consumer.Dispose();
Consumer = null;
}
if (ConsumerSession != null)
{
// Call Unsubscribe here if subscription is durable
ConsumerSession.Close();
ConsumerSession.Dispose();
ConsumerSession = null;
}
IsConnected = false;
}
public void Publish(string message)
{
Producer.Send(ProducerSession.CreateTextMessage(message));
}
public void Publish(string[] messages)
{
foreach (string msg in messages)
Publish(msg);
}
public void ConnectionExceptionHandler(Exception ex)
{
Disconnect(); // Clean up
if (ConnectionError != null)
ConnectionError(ex);
}
#region IDisposable Members
private bool disposed;
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
Disconnect();
disposed = true;
}
}
#endregion
}
謝謝T Rob這真的很有幫助。你是對的 - 類不應該在contstructor中啓動MQ。 linkedException是什麼意思? – Sam
JMS異常(以及因爲JMS建模而導致的XMS異常)是一種多級結構。在JMS中,頂層包含「未能連接」等通用異常,但隨後的層次包含特定於提供者的數據,如「找不到QMgr」或「錯誤的QMgr名稱」。如果存在鏈接的異常,它可能具有有助於診斷的信息。請參閱['LinkedException'](http://pic.dhe.ibm.com/infocenter/wmqv7/v7r5/topic/com.ibm.mq.msc.doc/sapiexcpt.html#sapiexcpt_getlkex) –
哦,不介意我看到linkedException是IllegalStateException的一個屬性。 – Sam