ActiveMq C#客户端 消息队列的使用（存和取）

1、准备工具

VS2013Apache.NMS.ActiveMQ-1.7.2-bin.zip
apache-activemq-5.14.0-bin.zip

2、开始项目

VS2013新建一个C#控制台应用程序，项目中添加两个dll引用，一个是D:\Apache.NMS.ActiveMQ-1.7.2-bin\lib\Apache.NMS\net-4.0目录下的Apache.NMS.dll，另一个是D:\Apache.NMS.ActiveMQ-1.7.2-bin\build\net-4.0\debug目录下的Apache.NMS.ActiveMQ.dll。

新建一个类，MyActiveMq.cs，用于对activemq消息队列接口的封装，实现如下：

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   using Apache.NMS; using Apache.NMS.ActiveMQ;   namespace NmsProducerClasses {     public class MyActiveMq     {         private IConnectionFactory factory;         private IConnection connection;         private ISession session;         private IMessageProducer prod;         private IMessageConsumer consumer;         private ITextMessage msg;           private bool isTopic = false;         private bool hasSelector = false;         private const string ClientID = "clientid";         private const string Selector = "filter='demo'";         private bool sendSuccess = true;         private bool receiveSuccess = true;           public MyActiveMq(bool isLocalMachine, string remoteAddress)         {             try             {                 //初始化工厂                   if (isLocalMachine)                 {                     factory = new ConnectionFactory("tcp://localhost:61616/");                 }                 else                 {                     factory = new ConnectionFactory("tcp://" + remoteAddress + ":61616/"); //写tcp://192.168.1.111:61616的形式连接其他服务器上的ActiveMQ服务器                           }                 //通过工厂建立连接                 connection = factory.CreateConnection();                 connection.ClientId = ClientID;                 connection.Start();                 //通过连接创建Session会话                 session = connection.CreateSession();             }             catch (System.Exception e)             {                 sendSuccess = false;                 receiveSuccess = false;                 Console.WriteLine("Exception:{0}", e.Message);                 Console.ReadLine();                 throw e;             }             Console.WriteLine("Begin connection...");         }             ~MyActiveMq()         {             //this.ShutDown();         }           /// <summary>         /// 初始化         /// </summary>         ///<param name="topic">选择是否是Topic         ///<param name="name">队列名         ///<param name="selector">是否设置过滤         public bool InitQueueOrTopic(bool topic, string name, bool selector = false)         {             try             {                 //通过会话创建生产者、消费者                 if (topic)                 {                     prod = session.CreateProducer(new Apache.NMS.ActiveMQ.Commands.ActiveMQTopic(name));                     if (selector)                     {                         consumer = session.CreateDurableConsumer(new Apache.NMS.ActiveMQ.Commands.ActiveMQTopic(name), ClientID, Selector, false);                         hasSelector = true;                     }                     else                     {                         consumer = session.CreateDurableConsumer(new Apache.NMS.ActiveMQ.Commands.ActiveMQTopic(name), ClientID, null, false);                         hasSelector = false;                     }                     isTopic = true;                 }                 else                 {                     prod = session.CreateProducer(new Apache.NMS.ActiveMQ.Commands.ActiveMQQueue(name));                     if (selector)                     {                         consumer = session.CreateConsumer(new Apache.NMS.ActiveMQ.Commands.ActiveMQQueue(name), Selector);                         hasSelector = true;                     }                     else                     {                         consumer = session.CreateConsumer(new Apache.NMS.ActiveMQ.Commands.ActiveMQQueue(name));                         hasSelector = false;                     }                     isTopic = false;                 }                 //创建一个发送的消息对象                 msg = prod.CreateTextMessage();             }             catch (System.Exception e)             {                 sendSuccess = false;                 receiveSuccess = false;                 Console.WriteLine("Exception:{0}", e.Message);                 Console.ReadLine();                 throw e;             }               return sendSuccess;         }             public bool SendMessage(string message, string msgId = "defult", MsgPriority priority = MsgPriority.Normal)         {             if (prod == null)             {                 sendSuccess = false;                 Console.WriteLine("call InitQueueOrTopic() first!!");                 return false;             }               Console.WriteLine("Begin send messages...");               //给这个对象赋实际的消息             msg.NMSCorrelationID = msgId;             msg.Properties["MyID"] = msgId;             msg.NMSMessageId = msgId;             msg.Text = message;             Console.WriteLine(message);               if (isTopic)             {                 sendSuccess = ProducerSubcriber(message, priority);             }             else             {                 sendSuccess = P2P(message, priority);             }               return sendSuccess;         }             public string GetMessage()         {             if (prod == null)             {                 Console.WriteLine("call InitQueueOrTopic() first!!");                 return null;             }               Console.WriteLine("Begin receive messages...");             ITextMessage revMessage = null;             try             {                 //同步阻塞10ms,没消息就直接返回null,注意此处时间不能设太短，否则还没取到消息就直接返回null了！！！                 revMessage = consumer.Receive(new TimeSpan(TimeSpan.TicksPerMillisecond *10)) as ITextMessage;             }             catch (System.Exception e)             {                 receiveSuccess = false;                 Console.WriteLine("Exception:{0}", e.Message);                 Console.ReadLine();                 throw e;             }               if (revMessage == null)             {                 Console.WriteLine("No message received!");                 return null;             }             else             {                 Console.WriteLine("Received message with Correlation ID: " + revMessage.NMSCorrelationID);                 //Console.WriteLine("Received message with Properties'ID: " + revMessage.Properties["MyID"]);                 Console.WriteLine("Received message with text: " + revMessage.Text);             }               return revMessage.Text;         }           //P2P模式，一个生产者对应一个消费者         private bool P2P(string message, MsgPriority priority)         {             try             {                 if (hasSelector)                 {                     //设置消息对象的属性，这个很重要，是Queue的过滤条件，也是P2P消息的唯一指定属性                     msg.Properties.SetString("filter", "demo");  //P2P模式                 }                 prod.Priority = priority;                 //设置持久化                 prod.DeliveryMode = MsgDeliveryMode.Persistent;                 //生产者把消息发送出去，几个枚举参数MsgDeliveryMode是否持久化，MsgPriority消息优先级别，存活时间，当然还有其他重载                 prod.Send(msg, MsgDeliveryMode.Persistent, priority, TimeSpan.MinValue);             }             catch (System.Exception e)             {                 sendSuccess = false;                 Console.WriteLine("Exception:{0}", e.Message);                 Console.ReadLine();                 throw e;             }               return sendSuccess;         }             //发布订阅模式，一个生产者多个消费者         private bool ProducerSubcriber(string message, MsgPriority priority)         {             try             {                 prod.Priority = priority;                 //设置持久化,如果DeliveryMode没有设置或者设置为NON_PERSISTENT，那么重启MQ之后消息就会丢失                 prod.DeliveryMode = MsgDeliveryMode.Persistent;                 prod.Send(msg, Apache.NMS.MsgDeliveryMode.Persistent, priority, TimeSpan.MinValue);                 //System.Threading.Thread.Sleep(1000);              }             catch (System.Exception e)             {                 sendSuccess = false;                 Console.WriteLine("Exception:{0}", e.Message);                 Console.ReadLine();                 throw e;             }               return sendSuccess;         }             public void ShutDown()         {             Console.WriteLine("Close connection and session...");             session.Close();             connection.Close();         }     } }

Program.cs代码如下：

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO; using System.Threading;   namespace NmsProducerClasses {     class Program     {         static void Main(string[] args)         {             MyActiveMq mymq = new MyActiveMq(isLocalMachine: true, remoteAddress: "");               mymq.InitQueueOrTopic(topic: false, name: "myqueue", selector: false);             //mymq.InitQueueOrTopic(topic: false, name: "seletorqueue", selector: true);             //mymq.InitQueueOrTopic(topic: true, name: "noselectortopic", selector: false);             //mymq.InitQueueOrTopic(topic: true, name: "selectortopic", selector: true);               //The full range of priority values (0-9) are supported by the JDBC message store. For KahaDB three priority categories are supported, Low (< 4), Default (= 4) and High (> 4).             User myuser0 = new User("0000", "Lowest", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser0), "newid", priority: Apache.NMS.MsgPriority.Lowest);             User myuser1 = new User("1111", "AboveLow", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser1), "newid", priority: Apache.NMS.MsgPriority.AboveLow);             User myuser2 = new User("2222", "AboveNormal", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser2), "newid", priority: Apache.NMS.MsgPriority.AboveNormal);             User myuser3 = new User("0000", "BelowNormal", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser3), "newid", priority: Apache.NMS.MsgPriority.BelowNormal);             User myuser4 = new User("1111", "High", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser4), "newid", priority: Apache.NMS.MsgPriority.High);             User myuser5 = new User("2222", "Highest", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser5), "newid", priority: Apache.NMS.MsgPriority.Highest);             User myuser6 = new User("0000", "Low", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser6), "newid", priority: Apache.NMS.MsgPriority.Low);             User myuser7 = new User("1111", "Normal", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser7), "newid", priority: Apache.NMS.MsgPriority.Normal);             User myuser8 = new User("2222", "VeryHigh", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser8), "newid", priority: Apache.NMS.MsgPriority.VeryHigh);             User myuser9 = new User("2222", "VeryLow", "img/p.jpg");             mymq.SendMessage(JsonUtil.ObjectToJson(myuser8), "newid", priority: Apache.NMS.MsgPriority.VeryLow);               int num = 20;             while (num-- > 0)             {                 mymq.GetMessage();                 //Thread.Sleep(1000);             }             mymq.ShutDown();                             //XML测试             //string xml = XmlTest.ObjToXml();             //Console.WriteLine("ObjToXml: {0}", xml);               //Json测试             //User u = new User() { Id="88", Imgurl="img/88.jpg", Name="haha88"};             //string jsonstr = JsonUtil.ObjectToJson(u);             //Console.WriteLine(jsonstr);                       }       }

3、测试

首先，需要启动消息队列，具体启动及测试消息队列步骤可见这边：点击打开链接

然后，运行项目，运行结果如下：

4、存在问题

priority并不能决定消息传送的严格消息，具体原因可见

http://activemq.apache.org/how-can-i-support-priority-queues.html

http://shift-alt-ctrl.iteye.com/blog/2034440