我怎样才能让 WCF MSMQ 一次获得超过 10 条消息?

How can I get WCF MSMQ to get more then 10 messages at a time?

我已经以编程方式设置了 msmq 绑定和限制,但即使我将 MaxConcurrentCalls、MaxConcurrentSessions 和 MaxConcurrentInstances 指定为高于 10,我也无法一次处理超过 10 条消息。

这是创建主机的代码:

        var host = new ServiceHost(typeof(MqProcessRequestServer));
        var binding = new NetMsmqBinding(NetMsmqSecurityMode.None)
        {
            UseSourceJournal = true,
            ReceiveErrorHandling = ReceiveErrorHandling.Drop,
            ReceiveRetryCount = 0,
            MaxRetryCycles = 0,
            RetryCycleDelay = TimeSpan.FromMinutes(1),
            ExactlyOnce = true,
            Durable = true,
            MaxReceivedMessageSize = 4000000000,
            ReceiveTimeout = TimeSpan.FromSeconds(30)
        };

        var queueUri = string.Format("net.msmq://localhost/private/{0}", scriptEngineVersion);
        host.AddServiceEndpoint(typeof(IMqProcessRequest), binding, queueUri);

        // Set throttling to ScriptEngine.Capacity in datamodel
        var throttling = new ServiceThrottlingBehavior
        {
            MaxConcurrentCalls = capacity,
            MaxConcurrentSessions = capacity,
            MaxConcurrentInstances = capacity
        };
        host.Description.Behaviors.Add(throttling);

        // Set service timeout
        var behavior = host.Description.Behaviors.Find<ServiceBehaviorAttribute>();
        behavior.TransactionTimeout = TimeSpan.FromSeconds(60).ToString();

这是服务行为:

[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple, InstanceContextMode = InstanceContextMode.PerCall, ReleaseServiceInstanceOnTransactionComplete = false)]
public class MqProcessRequestServer : IMqProcessRequest, IDisposable

我已经尝试了不同的容量值,所有小于 10 的都可以正常工作,因为我最多配置,但超过 10 只会是 10。

您允许的 10 个连接是由 ServicePointManager.DefaultConnectionLimit 上的默认值引起的。

在该设置的 MSDN documentation 的注释部分中说:

When used in the server environment (ASP.NET) DefaultConnectionLimit defaults to higher number of connections, which is 10.

在 none 服务器环境中,默认值为 2。

为了允许在应用程序启动时设置更多连接,当应用程序域加载时,DefaultConnectionLimit。

ServicePointManager.DefaultConnectionLimit = 100; 

上一行应该允许 100 个连接。