C# ActiveMQ+;国家导弹系统。未遵守预取限制
我有一个同步使用者通过此URL连接到队列,该URL还设置了预取限制:C# ActiveMQ+;国家导弹系统。未遵守预取限制,c#,.net-core,activemq,prefetch,nms,C#,.net Core,Activemq,Prefetch,Nms,我有一个同步使用者通过此URL连接到队列,该URL还设置了预取限制: tcp://localhost:61616?nms.prefetchPolicy.all=5 我以编程方式检查限制并将其输出到日志中,因此我知道语法是正确的,并且正在进行设置 我对预回迁的理解是,一个同步消费者将被发送x条消息,一旦它确认了其中的50%,它将被发送另一批消息。这不是我看到的行为 我已在URL中将预回迁设置为5 我已经用20条消息预先填充了一个队列 我把收到的每一条信息都记录下来 我已经注释掉了消息.Ackn
tcp://localhost:61616?nms.prefetchPolicy.all=5
我以编程方式检查限制并将其输出到日志中,因此我知道语法是正确的,并且正在进行设置
我对预回迁的理解是,一个同步消费者将被发送x条消息,一旦它确认了其中的50%,它将被发送另一批消息。这不是我看到的行为
- 我已在URL中将预回迁设置为5
- 我已经用20条消息预先填充了一个队列
- 我把收到的每一条信息都记录下来
- 我已经注释掉了
消息.Acknowledge()代码>我的代码中的行
- ActiveMQ v5.15.12
- Apache.NMS.ActiveMQ.NetCore v1.7.2()
如果希望控制从代理发送的消息,则需要使用零预取设置和同步接收使用者,以确保在任何给定时间只有一条消息可以发送到客户端。谢谢。您的声誉先于您,我一直希望您能为我指明正确的方向,就像您处理其他许多ActiveMQ问题一样。我现在了解到,预取是一种缓冲区,当消费者接受消息时,而不是当消息被确认时,会重新填充该缓冲区。
public Worker(LogWriter logger, ServiceConfiguration config, IConnectionFactory connectionFactory, IEndpointClient endpointClient)
{
log = logger;
configuration = config;
this.endpointClient = endpointClient;
connection = connectionFactory.CreateConnection();
connection.RedeliveryPolicy = GetRedeliveryPolicy();
connection.ExceptionListener += new ExceptionListener(OnException);
connection.Start();
session = connection.CreateSession(AcknowledgementMode.IndividualAcknowledge);
queue = session.GetQueue(configuration.JmsConfig.SourceQueueName);
consumer = session.CreateConsumer(queue);
log.InfoFormat("Prefetch set to:{0}. Maximum configurable:{1}", ((Connection)connection).PrefetchPolicy.QueuePrefetch, PrefetchPolicy.MAX_PREFETCH_SIZE);
while (true)
{
var message = consumer.Receive(TimeSpan.FromSeconds(5));
if (!Equals(message, null))
{
OnMessage(message);
}
}
}
public void OnMessage(IMessage message)
{
log.DebugFormat("Message {count} Received. Attempt:{attempt}", message.Properties.GetInt("count"), message.Properties.GetInt("NMSXDeliveryCount"));
//message.Acknowledge();
}
[18:07:37 INF] Prefetch set to:5. Maximum configurable:32766
[18:07:38 DBG] Message 0 Received. Attempt:2
[18:07:38 DBG] Message 1 Received. Attempt:2
[18:07:38 DBG] Message 2 Received. Attempt:2
[18:07:38 DBG] Message 3 Received. Attempt:2
[18:07:40 DBG] Message 4 Received. Attempt:2
[18:07:40 DBG] Message 5 Received. Attempt:2
[18:07:40 DBG] Message 6 Received. Attempt:2
[18:07:40 DBG] Message 7 Received. Attempt:2
[18:07:40 DBG] Message 8 Received. Attempt:2
[18:07:40 DBG] Message 9 Received. Attempt:2
[18:07:40 DBG] Message 10 Received. Attempt:2
[18:07:40 DBG] Message 11 Received. Attempt:2
[18:07:40 DBG] Message 12 Received. Attempt:2
[18:07:40 DBG] Message 13 Received. Attempt:2
[18:07:40 DBG] Message 14 Received. Attempt:2
[18:07:40 DBG] Message 15 Received. Attempt:2
[18:07:41 DBG] Message 16 Received. Attempt:2
[18:07:41 DBG] Message 17 Received. Attempt:2
[18:07:41 DBG] Message 18 Received. Attempt:2
[18:07:41 DBG] Message 19 Received. Attempt:2