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);
}
}
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));
}
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));
}