IBM.WMQ订阅主题，连续获取消息解决办法
去队列里面一直获取消息，一开始想到了两种解决方案：
第一：订阅一次获取一次消息，正常的话每次都能获取到，但是要及时去清理订阅并且时间粒度不好控制
第二：订阅一次，再获取消息这里加死循环，超时MQ已经做了，所以可以不用控制线程等待，获取到消息了以后，直接通过自定义事件的机制去及时处理消息
从最终实验结果来看，第二种是最优的做法，可以做到随时获取到消息，又不占用资源。接下来我把最终的实现代码分享处理，希望对大家有所帮助，有不对的地方，请及时联系我。
订阅主题：
private IIBMWMQMsgHandler _msgHandler; public IBMWMQHelper() { _msgHandler = new DefaultIBMWMQMsgHandler(); } public IBMWMQHelper(IIBMWMQMsgHandler msgHandler) { _msgHandler = msgHandler; }
/// <summary> /// 订阅主题。订阅一次并尝试一直获取消息 /// </summary> public void SubTopic1(string business, bool isGetMsg = true) { IBMWMQEventSource eventSource = new IBMWMQEventSource(); IBMWMQMsgEventListener msgEventListener = new IBMWMQMsgEventListener(_msgHandler); MQSubscription subs = null; try { //订阅事件 msgEventListener.Subscribe(eventSource); //MQEnvironment.CCSID = 1381; using (var mqmgr = MQQueueManager.Connect(IBMWMQConfig.QUEUE_MGR_NAME, MQC.MQCO_NONE, IBMWMQConfig.CHANNEL, IBMWMQConfig.CONNECTION_INFO)) { subs = new MQSubscription(mqmgr); if (mqmgr.IsConnected) { this.TryAdd(business, subs); int option = MQC.MQSO_CREATE | MQC.MQSO_FAIL_IF_QUIESCING | MQC.MQSO_DURABLE | MQC.MQSO_RESUME; string subName = string.Format(IBMWMQConfig.SUBSCRIPTION_TEMPLATE, business); string topicName = string.Format(IBMWMQConfig.TOPIC_TEMPLATE, business); try { subs.Subscribe(subName, option, topicName); } catch (MQException ex) { string code = ex.Reason.ToString(); //引发事件 eventSource.RaiseErroeMsgEvent(business, code); } while (isGetMsg) { eventSource.RaiseErroeMsgEvent(business, string.Format("开始尝试获取 {0} 消息...", business)); try { MQMessage incoming = new MQMessage() { CharacterSet = MQC.CODESET_UTF, Encoding = MQC.MQENC_NORMAL }; MQGetMessageOptions gmo = new MQGetMessageOptions(); gmo.WaitInterval = 10 * 1000; //MQC.MQWI_UNLIMITED; gmo.Options |= MQC.MQGMO_WAIT; gmo.Options |= MQC.MQGMO_SYNCPOINT; subs.Get(incoming, gmo); string message = incoming.ReadAll(); if (!string.IsNullOrEmpty(message)) { //引发事件 eventSource.RaiseNewMsgEvent(business, message); } } catch (MQException ex) { string code = ex.Reason.ToString(); //引发事件 eventSource.RaiseErroeMsgEvent(business, code); } } } } } catch (MQException e) { string code = e.Reason.ToString(); //引发事件 eventSource.RaiseErroeMsgEvent(business, code); } finally { //if (subs != null) //{ // subs.Close(MQC.MQCO_REMOVE_SUB, closeSubQueue: true, closeSubQueueOptions: MQC.MQCO_NONE); //} } }
或者使用原生方式：
/// <summary> /// 订阅主题。订阅一次并尝试一直获取消息（原生） /// </summary> /// <param name="business"></param /// <param name="transportMode"></param> /// <param name="durability"></param> public void SubTopic2(string business, string transportMode = "managed", string durability = "durable") { Hashtable properties = new Hashtable(); MQTopic topic = null; IBMWMQEventSource eventSource = new IBMWMQEventSource(); IBMWMQMsgEventListener msgEventListener = new IBMWMQMsgEventListener(_msgHandler); try { //订阅事件 msgEventListener.Subscribe(eventSource); //MQEnvironment.CCSID = 1381; //自动重连 properties.Add(MQC.CONNECT_OPTIONS_PROPERTY, MQC.MQCNO_RECONNECT_Q_MGR); properties.Add(MQC.HOST_NAME_PROPERTY, IBMWMQConfig.CONNECTION_HOST); properties.Add(MQC.PORT_PROPERTY, IBMWMQConfig.CONNECTION_PORT); properties.Add(MQC.CHANNEL_PROPERTY, IBMWMQConfig.CHANNEL); if (transportMode == "managed") { properties.Add(MQC.TRANSPORT_PROPERTY, MQC.TRANSPORT_MQSERIES_MANAGED); } else if (transportMode == "unmanaged") { properties.Add(MQC.TRANSPORT_PROPERTY, MQC.TRANSPORT_MQSERIES_CLIENT); } using (var queueManager = new MQQueueManager(IBMWMQConfig.QUEUE_MGR_NAME, properties)) { if (queueManager.IsConnected) { int option4Durable = MQC.MQSO_CREATE | MQC.MQSO_FAIL_IF_QUIESCING | MQC.MQSO_DURABLE | MQC.MQSO_RESUME;//持久化订阅 int option4NotDurable = MQC.MQSO_CREATE | MQC.MQSO_FAIL_IF_QUIESCING;//非持久化订阅 string subName = string.Format(IBMWMQConfig.SUBSCRIPTION_TEMPLATE, business); string topicName = string.Format(IBMWMQConfig.TOPIC_TEMPLATE, business); try { if (durability == "durable") { topic = queueManager.AccessTopic(topicName, null, option4Durable, null, subName); } else { topic = queueManager.AccessTopic(topicName, null, MQC.MQTOPIC_OPEN_AS_SUBSCRIPTION, option4NotDurable); } while (true) { eventSource.RaiseErroeMsgEvent(business, string.Format("开始尝试获取 {0} 消息...", business)); try { MQMessage incoming = new MQMessage() { CharacterSet = MQC.CODESET_UTF, Encoding = MQC.MQENC_NORMAL }; MQGetMessageOptions gmo = new MQGetMessageOptions(); gmo.WaitInterval = 10 * 1000; //MQC.MQWI_UNLIMITED; gmo.Options |= MQC.MQGMO_WAIT; gmo.Options |= MQC.MQGMO_SYNCPOINT; topic.Get(incoming, gmo); string message = incoming.ReadString(incoming.MessageLength); if (!string.IsNullOrEmpty(message)) { //引发事件 eventSource.RaiseNewMsgEvent(business, message); } } catch (MQException ex) { string code = ex.Reason.ToString(); //引发事件 eventSource.RaiseErroeMsgEvent(business, code); } } } catch (MQException ex) { string code = ex.Reason.ToString(); //引发事件 eventSource.RaiseErroeMsgEvent(business, code); } } else { eventSource.RaiseErroeMsgEvent(business, "连接队列管理器失败！"); } } } catch (MQException e) { string code = e.Reason.ToString(); //引发事件 eventSource.RaiseErroeMsgEvent(business, code); } }
接下来开始自定义事件：
定义事件中心：
public class IBMWMQEventSource { /// <summary> /// 新消息处理委托 /// </summary> /// <param name="business"></param> /// <param name="msg"></param> public delegate void NewMsgHandler(string business, string msg); /// <summary> /// 新消息处理事件 /// </summary> public event NewMsgHandler NewMsgEventHandler; /// <summary> /// 错误消息处理委托 /// </summary> /// <param name="errorCode"></param> public delegate void ErrorMsgHandler(string business, string errorCode); /// <summary> /// 错误消息处理事件 /// </summary> public event ErrorMsgHandler ErrorMsgEventHandler; /// <summary> /// 引发新消息处理事件的方法 /// </summary> /// <param name="business"></param> /// <param name="msg"></param> public void RaiseNewMsgEvent(string business, string msg) { if (NewMsgEventHandler != null) { NewMsgEventHandler.Invoke(business, msg); } } /// <summary> /// 引发错误消息处理事件的方法 /// </summary> /// <param name="business"></param> /// <param name="errorCode"></param> public void RaiseErroeMsgEvent(string business, string errorCode) { if (ErrorMsgEventHandler != null) { ErrorMsgEventHandler.Invoke(business, errorCode); } } }
定义事件监听器：
public class IBMWMQMsgEventListener { private readonly IIBMWMQMsgHandler _msgHandler; public IBMWMQMsgEventListener(IIBMWMQMsgHandler msgHandler) { _msgHandler = msgHandler; } /// <summary> /// 订阅事件 /// </summary> public void Subscribe(IBMWMQEventSource eventSource) { eventSource.NewMsgEventHandler += _msgHandler.OnNewMsgHandler; eventSource.ErrorMsgEventHandler += _msgHandler.OnErrorMsgHandler; } /// <summary> /// 取消订阅事件 /// </summary> public void UnSubscribe(IBMWMQEventSource eventSource) { eventSource.NewMsgEventHandler -= _msgHandler.OnNewMsgHandler; eventSource.ErrorMsgEventHandler -= _msgHandler.OnErrorMsgHandler; } }
定义消息处理接口：
public interface IIBMWMQMsgHandler { /// <summary> /// 处理新消息 /// </summary> /// <param name="business">业务代码</param> /// <param name="msg">消息包</param> void OnNewMsgHandler(string business, string msg); /// <summary> /// 处理错误消息 /// </summary> /// <param name="business">业务代码</param> /// <param name="errorCode">错误码</param> void OnErrorMsgHandler(string business, string errorCode); }
默认消息处理机制：
public class DefaultIBMWMQMsgHandler : IIBMWMQMsgHandler { /// <summary> /// 处理新消息 /// </summary> /// <param name="business">业务代码</param> /// <param name="msg">消息包</param> public void OnNewMsgHandler(string business, string msg) { Trace.WriteLine(string.Format("新消息到达，数据包：{0}", msg)); } /// <summary> /// 处理错误消息 /// </summary> /// <param name="business">业务代码</param> /// <param name="errorCode">错误码</param> public void OnErrorMsgHandler(string business, string errorCode) { Trace.WriteLine(string.Format("处理错误消息，错误码：{0}", errorCode)); } }
定义消息处理方法：
public class CustomIBMWMQMsgHandler : BaseJobManager, IIBMWMQMsgHandler { /// <summary> /// 消息自定义业务处理 /// </summary> private static CustomBusinessHandler customBusinessHandler = new CustomBusinessHandler(); /// <summary> /// 处理新消息 /// </summary> /// <param name="business"></param> /// <param name="msg"></param> public void OnNewMsgHandler(string business, string msg) { //获取配置文件 List<JobConfigEntity> configs = InitJobConfig(); string businessName = configs.First(c => c.JobName.Replace("_", "").Contains(business)).Name; switch (business) { case IBMWMQConfig.BUSINESS_NAME_ZDFZ09: msg = customBusinessHandler.RemoveMsgHeader(msg, IBMWMQConfig.BUSINESS_NAME_ZDF_Z09); customBusinessHandler.DO_ZDF_Z09(business, msg); break; case IBMWMQConfig.BUSINESS_NAME_ZAPZ10: msg = customBusinessHandler.RemoveMsgHeader(msg, IBMWMQConfig.BUSINESS_NAME_ZAP_Z10); customBusinessHandler.DO_ZAP_Z10(business, msg); break; case IBMWMQConfig.BUSINESS_NAME_OULR24: msg = customBusinessHandler.RemoveMsgHeader(msg, IBMWMQConfig.BUSINESS_NAME_OUL_R24); customBusinessHandler.DO_OUL_R24(business, msg); break; } this.WriteInfo(this.GetType(), string.Format("收到来自{0}的消息，数据包：{1}", businessName, msg)); } /// <summary> /// 处理错误消息 /// </summary> /// <param name="business"></param> /// <param name="errorCode"></param> public void OnErrorMsgHandler(string business, string errorCode) { if (!string.IsNullOrEmpty(errorCode)) { //获取配置文件 List<JobConfigEntity> configs = InitJobConfig(); string businessName = configs.First(c => c.JobName.Replace("_", "").Contains(business)).Name; //TODO 其他消息内容校验 if (errorCode.Equals("2033")) { this.WriteInfo(this.GetType(), string.Format("MQRC_NO_MSG_AVAILABLE.{0} 无消息（{1}）。", businessName, errorCode)); } else if (errorCode.Equals("2085")) { this.WriteInfo(this.GetType(), string.Format("MQRC_UNKNOWN_OBJECT_NAME.{0} 主题不存在（{1}）。", businessName, errorCode)); } else if (errorCode.Equals("2429")) { this.WriteInfo(this.GetType(), string.Format("MQRC_SUBSCRIPTION_IN_USE.{0} 主题已被订阅（{1}）。", businessName, errorCode)); } else if (errorCode.Equals("2537")) { this.WriteInfo(this.GetType(), string.Format("MQRC_CHANNEL_NOT_AVAILABLE.频道不可用（{0}）。", errorCode)); } else if (errorCode.Equals("2538")) { this.WriteInfo(this.GetType(), string.Format("MQRC_HOST_NOT_AVAILABLE.无法连接消息队列主机（{0}）。", errorCode)); } else if (errorCode.Equals("2539")) { this.WriteInfo(this.GetType(), string.Format("MQRC_CHANNEL_CONFIG_ERROR.频道配置错误（{0}）。", errorCode)); } else if (errorCode.Equals("2540")) { this.WriteInfo(this.GetType(), string.Format("MQRC_UNKNOWN_CHANNEL_NAME.未知频道称（{0}）。", errorCode)); } else { if (errorCode.Length == 4) { this.WriteInfo(this.GetType(), string.Format("未知错误消息，错误原因编码：{0}。", errorCode)); } else { this.WriteInfo(this.GetType(), string.Format("{0} {1}", businessName, errorCode)); } } } } }
去掉消息头：
/// <summary> /// 去掉消息头 /// </summary> /// <param name="msg"></param> /// <param name="name"></param> /// <returns></returns> public string RemoveMsgHeader(string msg, string name) { msg = msg.Trim(); //去掉消息头 int index = msg.IndexOf("<" + name, StringComparison.Ordinal); if (index > 0) { string temp = msg.Substring(0, index); msg = msg.Substring(index, msg.Length - temp.Length); msg = msg.Trim(); } return msg; }
配置信息：
public class IBMWMQConfig { /// <summary> /// MQ主机地址 /// </summary> private static readonly string CONNECTION_HOST = ConfigHelper.GetValue("IBM_WMQ_CONNECTION_HOST"); /// <summary> /// 通讯端口 /// </summary> private const int CONNECTION_PORT = 4421; /// <summary> /// CLIENT_ID /// </summary> private const string CLIENT_ID = ""; /// <summary> /// 通道名称 /// </summary> public const string CHANNEL = ""; /// <summary> /// 队列管理器名称 /// </summary> public const string QUEUE_MGR_NAME = ""; /// <summary> /// 订阅主题持久化标识，{0}标识具体业务 /// </summary> public static readonly string SUBSCRIPTION_TEMPLATE = "JMS:" + QUEUE_MGR_NAME + ":" + CLIENT_ID + "_{0}.REQ:{0}.REQ"; /// <summary> /// 主题名称模板，{0}标识具体业务 /// </summary> public static readonly string TOPIC_TEMPLATE = "{0}.REQ"; /// <summary> /// IBM.WMQ连接字符串 /// </summary> public static readonly string CONNECTION_INFO = string.Format("{0}({1})", CONNECTION_HOST, CONNECTION_PORT); }
调用：
IBMWMQHelper helper = new IBMWMQHelper(new CustomIBMWMQMsgHandler()); helper.SubTopic1(IBMWMQConfig.BUSINESS_NAME_ZAPZ10);
作 者：大師兄丶
出 处：http://www.cnblogs.com/zhao-yi
Git 地 址：https://github.com/ZhaoYis
个人博客：http://www.zhaoyis.com.cn
关于作者：主要从事基于.Net Framework平台的项目开发。如有问题或建议，请多多赐教！
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出 处：http://www.cnblogs.com/zhao-yi
Git 地 址：https://github.com/ZhaoYis
个人博客：http://www.zhaoyis.com.cn
关于作者：主要从事基于.Net Framework平台的项目开发。如有问题或建议，请多多赐教！
版权声明：本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文链接。
声援博主：如果您觉得文章对您有帮助，可以点击文章右下角推荐一下。您的鼓励是作者坚持原创和持续写作的最大动力！
