IBM.WMQ订阅消息

网上关于IBM这个消息队列中间件的资料相对比较少，C#相关的资料就更少了，最近因为要对接这个队列中间件，花了不少功夫去搜索、整理各种资料，遇到很多问题，因此记录下来。

1、基于 amqmdnet.dll 进行开发，这个是官方提供的DLL，安装了IBM WebSphere MQ后在安装目录可以找到（C:Program FilesIBMWebSphere MQin）

2、基于 MmqiNetLite.dll 开发，这是一个开源组件，地址：https://github.com/fglaeser/mmqinet，这个项目代码有部分未完善，原作者也是好几年没更新，但是基础功能可以使用，本文代码主要基于此编写

源码如下：

public class IBMWMQConfig
    {
        /// <summary>
        /// MQ主机地址
        /// </summary>
        private const string 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 = "SYSTEM.ADMIN.SVRCONN";
        /// <summary>
        /// 队列管理器名称
        /// </summary>
        public const string QUEUE_MGR_NAME = "PHIBHUBGW1";
        /// <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);
    }

订阅消息：

/// <summary>
        /// 订阅主题
        /// </summary>
        /// <param name="business"></param>
        /// <returns></returns>
        private string SubTopic(string business)
        {
            string message = string.Empty;
            try
            {
                using (var mqmgr = MQQueueManager.Connect(IBMWMQConfig.QUEUE_MGR_NAME, MQC.MQCO_NONE, IBMWMQConfig.CHANNEL, IBMWMQConfig.CONNECTION_INFO))
                {
                    MQSubscription subs = new MQSubscription(mqmgr);
                    if (mqmgr.IsConnected)
                    {
                        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);

                        subs.Subscribe(subName, option, topicName);

                        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);
                        message = incoming.ReadAll();

                        //subs.Close(MQC.MQCO_REMOVE_SUB, closeSubQueue: true, closeSubQueueOptions: MQC.MQCO_NONE);
                    }
                }
            }
            catch (MQException e)
            {
                message = e.Reason.ToString();
            }
            return message;
        }

向队列推送一条消息：

/// <summary>
        /// 向消息队列推送一条消息
        /// </summary>
        /// <param name="msg">消息内容</param>
        /// <param name="queueName">队列名称</param>
        public void PushMsgToQueue(string msg, string queueName)
        {
            using (var mqmgr = MQQueueManager.Connect(IBMWMQConfig.QUEUE_MGR_NAME, MQC.MQCO_NONE, IBMWMQConfig.CHANNEL, IBMWMQConfig.CONNECTION_INFO))
            using (var q = new MQQueue(mqmgr, queueName, MQC.MQOO_INPUT_AS_Q_DEF + MQC.MQOO_OUTPUT + MQC.MQOO_FAIL_IF_QUIESCING))
            {
                var outgoing = new MQMessage()
                {
                    CharacterSet = MQC.CODESET_UTF,
                    Encoding = MQC.MQENC_NORMAL
                };
                outgoing.WriteString(msg);
                q.Put(outgoing, new MQPutMessageOptions());
            }
        }

        /// <summary>
        /// 向消息队列推送一条消息
        /// </summary>
        /// <param name="msg">消息内容</param>
        /// <param name="queueName">队列名称</param>
        public void PushMsgToQueue1(string msg, string queueName)
        {
            using (var mqmgr = MQQueueManager.Connect(IBMWMQConfig.QUEUE_MGR_NAME, MQC.MQCO_NONE, IBMWMQConfig.CHANNEL, IBMWMQConfig.CONNECTION_INFO))
            {
                if (mqmgr.IsConnected)
                {
                    var outgoing = new MQMessage()
                    {
                        CharacterSet = MQC.CODESET_UTF,
                        Encoding = MQC.MQENC_NORMAL
                    };
                    outgoing.WriteString(msg);

                    var od = new MQObjectDescriptor
                    {
                        ObjectType = MQC.MQOT_Q,
                        ObjectName = queueName
                    };
                    mqmgr.Put1(od, outgoing, new MQPutMessageOptions());
                }
            }
        }