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：
/// <summary>
/// 订阅主题。订阅一次并尝试一直获取消息
/// </summary>
/// <param name="business"></param>
public void SubTopic1(string business)
{
IBMWMQEventSource msgHandler = new IBMWMQEventSource();
IBMWMQMsgEventListener msgEventListener = new IBMWMQMsgEventListener();
MQSubscription subs = null;
try
{
using (var mqmgr = MQQueueManager.Connect(IBMWMQConfig.QUEUE_MGR_NAME, MQC.MQCO_NONE, IBMWMQConfig.CHANNEL, IBMWMQConfig.CONNECTION_INFO))
{
subs = new MQSubscription(mqmgr);
if (mqmgr.IsConnected)
{
//订阅事件
msgEventListener.Subscribe(msgHandler);
int option = MQC.MQSO_CREATE + MQC.MQSO_RESUME + MQC.MQSO_NON_DURABLE + MQC.MQSO_MANAGED + MQC.MQSO_FAIL_IF_QUIESCING;
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
msgHandler.RaiseErroeMsgEvent(business, code);
}
while (true)
{
msgHandler.RaiseErroeMsgEvent(business, string.Format("开始尝试获取 {0} 消息...", business));
try
{
MQMessage incoming = new MQMessage();
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
msgHandler.RaiseNewMsgEvent(business, message);
}
}
catch (MQException ex)
{
string code = ex.Reason.ToString();
//引发事件
msgHandler.RaiseErroeMsgEvent(business, code);
}
}
}
}
}
catch (MQException e)
{
string code = e.Reason.ToString();
//引发事件
msgHandler.RaiseErroeMsgEvent(business, code);
}
finally
{
//if (subs != null)
//{
// subs.Close(MQC.MQCO_REMOVE_SUB, closeSubQueue: true, closeSubQueueOptions: MQC.MQCO_NONE);
//}
}
}
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 : MsgHandler
{
/// <summary>
/// 订阅事件
/// </summary>
public void Subscribe(IBMWMQEventSource eventSource)
{
eventSource.NewMsgEventHandler += this.OnNewMsgHandler;
eventSource.ErrorMsgEventHandler += this.OnErrorMsgHandler;
}
/// <summary>
/// 取消订阅事件
/// </summary>
public void UnSubscribe(IBMWMQEventSource eventSource)
{
eventSource.NewMsgEventHandler -= this.OnNewMsgHandler;
eventSource.ErrorMsgEventHandler -= this.OnErrorMsgHandler;
}
}
定义消息处理方法：
public class MsgHandler : BaseJobManager
{
/// <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>
protected virtual 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>
protected virtual void one rrorMsgHandler(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("{0} 无消息（{1}）。", businessName, errorCode));
}
else if (errorCode.Equals("2085"))
{
this.WriteInfo(this.GetType(), string.Format("{0} 主题不存在（{1}）。", businessName, errorCode));
}
else if (errorCode.Equals("2429"))
{
this.WriteInfo(this.GetType(), string.Format("{0} 主题已被订阅（{1}）。", businessName, errorCode));
}
else if (errorCode.Equals("2538"))
{
this.WriteInfo(this.GetType(), string.Format("无法连接消息队列主机（{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：
CustomMsgHandler helper = new CustomMsgHandler();
helper.SubTopic1(IBMWMQConfig.BUSINESS_NAME_ZAPZ10);