public static void ReceiveMsg()
{
Apache.NMS.IConnection con = null;
try
{
var factory = new ConnectionFactory(brokerUrl);
factory.UserName = "******";
factory.Password = "******";
factory.ClientId = "MsgApp-Receiver1";
factory.PrefetchPolicy = new PrefetchPolicy()
{
DurableTopicPrefetch = 1, TopicPrefetch = 1
};
var rpolicy = new RedeliveryPolicy();
rpolicy.InitialRedeliveryDelay = 15000;
rpolicy.MaximumRedeliveries = 5;
rpolicy.UseExponentialBackOff = false;
using (con = factory.CreateConnection("admin", "admin"))
{
con.RedeliveryPolicy = rpolicy;
//con.AcknowledgementMode = AcknowledgementMode.ClientAcknowledge;
using (var session = con.CreateSession(AcknowledgementMode.ClientAcknowledge))
{
var dest = session.GetTopic(topicName);
var durableConsumer = session.CreateDurableConsumer(dest, "durable-eol-orderMsgSubscriber1", null, false);
con.Start();
durableConsumer.Listener += (msg) =>
{
Console.WriteLine("durable-eol-orderMsgSubscriber-1: " + ((ActiveMQTextMessage)msg).Text);
if ((msg as ActiveMQTextMessage).Text.StartsWith("0"))
{
msg.Acknowledge();
}
else
{
session.Recover();
}
};
Console.ReadKey();
durableConsumer.Close();
}
}
}
catch (Exception ex)
{
string emsg = ex.Message;
}
finally
{
con.Dispose();
}
}
public void TestValidateRedeliveryCountOnRollbackWithPrefetch0()
{
const int numMessages = 1;
(connection as Connection).PrefetchPolicy.SetAll(0);
connection.Start();
PopulateDestination(numMessages, destinationName);
{
int received = 0;
int maxRetries = new RedeliveryPolicy().MaximumRedeliveries;
while (received < maxRetries)
{
ISession session = connection.CreateSession(AcknowledgementMode.Transactional);
IDestination destination = session.GetQueue(destinationName);
IMessageConsumer consumer = session.CreateConsumer(destination);
ITextMessage msg = (ITextMessage)consumer.Receive(TimeSpan.FromMilliseconds(2000));
if (msg != null)
{
Interlocked.Increment(ref received);
Assert.AreEqual(received, msg.Properties.GetLong("NMSXDeliveryCount"),
"redelivery property matches deliveries");
session.Rollback();
}
session.Close();
}
ConsumeMessage(maxRetries + 1);
}
}
public void Executes_redelivery_policy_with_collision_enabled_correctly()
{
RedeliveryPolicy policy = new RedeliveryPolicy();
policy.BackOffMultiplier = 2;
policy.InitialRedeliveryDelay = 5;
policy.UseExponentialBackOff = true;
policy.UseCollisionAvoidance = true;
policy.CollisionAvoidancePercent = 10;
// simulate a retry of 10 times
int delay = policy.RedeliveryDelay(0);
Assert.IsTrue(delay == 0, "not zero is " + policy.RedeliveryDelay(0));
delay = policy.RedeliveryDelay(1);
Assert.IsTrue(delay >= 4.5 && delay <= 5.5, "not delay >= 4.5 && delay <= 5.5 is " + policy.RedeliveryDelay(1));
delay = policy.RedeliveryDelay(2);
Assert.IsTrue(delay >= 9 && delay <= 11, "not delay >= 9 && delay <= 11 is " + policy.RedeliveryDelay(2));
delay = policy.RedeliveryDelay(3);
Assert.IsTrue(delay >= 18 && delay <= 22, "not delay >= 18 && delay <= 22 is " + policy.RedeliveryDelay(3));
delay = policy.RedeliveryDelay(4);
Assert.IsTrue(delay >= 36 && delay <= 44, "not delay >= 36 && delay <= 44 is " + policy.RedeliveryDelay(4));
delay = policy.RedeliveryDelay(5);
Assert.IsTrue(delay >= 72 && delay <= 88, "not delay >= 72 && delay <= 88 is " + policy.RedeliveryDelay(5));
delay = policy.RedeliveryDelay(6);
Assert.IsTrue(delay >= 144 && delay <= 176, "not delay >= 144 && delay <= 176 is " + policy.RedeliveryDelay(6));
delay = policy.RedeliveryDelay(7);
Assert.IsTrue(delay >= 288 && delay <= 352, "not delay >= 288 && delay <= 352 is " + policy.RedeliveryDelay(7));
delay = policy.RedeliveryDelay(8);
Assert.IsTrue(delay >= 576 && delay <= 704, "not delay >= 576 && delay <= 704 is " + policy.RedeliveryDelay(8));
delay = policy.RedeliveryDelay(9);
Assert.IsTrue(delay >= 1152 && delay <= 1408, "not delay >= 1152 && delay <= 1408 is " + policy.RedeliveryDelay(9));
delay = policy.RedeliveryDelay(10);
Assert.IsTrue(delay >= 2304 && delay <= 2816, "not delay >= 2304 && delay <= 2816 is " + policy.RedeliveryDelay(10));
}
private int CalculateDeliveryTimeout(int tryIndex)
{
if (tryIndex <= 0)
{
return(0);
}
RedeliveryPolicy policy = this.queue.RedeliveryPolicy;
int retryIndex = tryIndex - 1;
if (retryIndex == 0)
{
// this reproduces default ActiveMQ configuration when the first retry occurs immediately
return(0);
}
if (!policy.UseExponentialBackOff)
{
return(policy.InitialRedeliveryDelay);
}
int deliveryTimeout = Convert.ToInt32(policy.InitialRedeliveryDelay * Math.Pow(policy.BackOffMultiplier, retryIndex - 1)) - this.CalculateDeliveryTimeout(tryIndex - 1);
return(deliveryTimeout < 0
? 0
: deliveryTimeout);
}
public void Should_get_collision_percent_correctly()
{
RedeliveryPolicy policy = new RedeliveryPolicy();
policy.CollisionAvoidancePercent = 45;
Assert.IsTrue(policy.CollisionAvoidancePercent == 45);
}
internal void Rollback()
{
lock (_syncRoot)
lock ( _dispatchedMessages )
{
if (_dispatchedMessages.Count == 0)
{
return;
}
// Only increase the redelivery delay after the first redelivery..
var lastMd = _dispatchedMessages.First();
var currentRedeliveryCount = lastMd.Message.RedeliveryCounter;
_redeliveryDelay = RedeliveryPolicy.RedeliveryDelay(currentRedeliveryCount);
foreach (var dispatch in _dispatchedMessages)
{
dispatch.Message.OnMessageRollback();
}
if (RedeliveryPolicy.MaximumRedeliveries >= 0 &&
lastMd.Message.RedeliveryCounter > RedeliveryPolicy.MaximumRedeliveries)
{
_redeliveryDelay = 0;
}
else
{
// stop the delivery of messages.
_unconsumedMessages.Stop();
foreach (var dispatch in _dispatchedMessages)
{
_unconsumedMessages.Enqueue(dispatch, true);
}
if (_redeliveryDelay > 0 && !_unconsumedMessages.Stopped)
{
var deadline = DateTime.Now.AddMilliseconds(_redeliveryDelay);
ThreadPool.QueueUserWorkItem(RollbackHelper, deadline);
}
else
{
Start();
}
}
_deliveredCounter -= _dispatchedMessages.Count;
_dispatchedMessages.Clear();
}
// Only redispatch if there's an async _listener otherwise a synchronous
// consumer will pull them from the local queue.
if (_listener != null)
{
_session.Redispatch(_unconsumedMessages);
}
}
protected IRedeliveryPolicy GetRedeliveryPolicy()
{
RedeliveryPolicy redeliveryPolicy = new RedeliveryPolicy();
redeliveryPolicy.InitialRedeliveryDelay = 1000;
redeliveryPolicy.MaximumRedeliveries = 3;
redeliveryPolicy.BackOffMultiplier = (short)2;
redeliveryPolicy.UseExponentialBackOff = true;
return(redeliveryPolicy);
}
public void Executes_redelivery_policy_without_backoff_enabled_correctly()
{
RedeliveryPolicy policy = new RedeliveryPolicy();
policy.InitialRedeliveryDelay = 5;
// simulate a retry of 10 times
Assert.IsTrue(policy.RedeliveryDelay(0) == 0, "redelivery delay not 0 is " + policy.RedeliveryDelay(0));
Assert.IsTrue(policy.RedeliveryDelay(1) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(1));
Assert.IsTrue(policy.RedeliveryDelay(2) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(2));
Assert.IsTrue(policy.RedeliveryDelay(3) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(3));
Assert.IsTrue(policy.RedeliveryDelay(4) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(4));
Assert.IsTrue(policy.RedeliveryDelay(5) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(5));
Assert.IsTrue(policy.RedeliveryDelay(6) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(6));
Assert.IsTrue(policy.RedeliveryDelay(7) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(7));
Assert.IsTrue(policy.RedeliveryDelay(8) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(8));
Assert.IsTrue(policy.RedeliveryDelay(9) == 5, "redelivery delay not 5 is " + policy.RedeliveryDelay(9));
}
public void Executes_redelivery_policy_with_backoff_of_3_enabled_correctly()
{
RedeliveryPolicy policy = new RedeliveryPolicy();
policy.BackOffMultiplier = 3;
policy.InitialRedeliveryDelay = 3;
policy.UseExponentialBackOff = true;
// simulate a retry of 10 times
Assert.IsTrue(policy.RedeliveryDelay(0) == 0, "redelivery delay not 5 is " + policy.RedeliveryDelay(0));
Assert.IsTrue(policy.RedeliveryDelay(1) == 3, "redelivery delay not 10 is " + policy.RedeliveryDelay(1));
Assert.IsTrue(policy.RedeliveryDelay(2) == 9, "redelivery delay not 20 is " + policy.RedeliveryDelay(2));
Assert.IsTrue(policy.RedeliveryDelay(3) == 27, "redelivery delay not 40 is " + policy.RedeliveryDelay(3));
Assert.IsTrue(policy.RedeliveryDelay(4) == 81, "redelivery delay not 80 is " + policy.RedeliveryDelay(4));
Assert.IsTrue(policy.RedeliveryDelay(5) == 243, "redelivery delay not 160 is " + policy.RedeliveryDelay(5));
Assert.IsTrue(policy.RedeliveryDelay(6) == 729, "redelivery delay not 320 is " + policy.RedeliveryDelay(6));
Assert.IsTrue(policy.RedeliveryDelay(7) == 2187, "redelivery delay not 640 is " + policy.RedeliveryDelay(7));
Assert.IsTrue(policy.RedeliveryDelay(8) == 6561, "redelivery delay not 1280 is " + policy.RedeliveryDelay(8));
Assert.IsTrue(policy.RedeliveryDelay(9) == 19683, "redelivery delay not 2560 is " + policy.RedeliveryDelay(9));
}
