/// <summary>
/// Closes the AMQP link used by the consumer, capturing the passive terminal exception that triggered
/// closing if it should be surfaced during the next requested operation.
/// </summary>
///
protected void CloseConsumerLink(ReceivingAmqpLink link)
{
// If there is no link, then no action needs to be
// taken.
if (link == null)
{
return;
}
// If the consumer is being closed, the sentinel variable will already be set, and
// the terminal exception need not be considered.
if (!_closed)
{
var linkException = GetTerminalException(link);
// If the terminal exception indicates that the partition was stolen from the consumer,
// capture it so that it can be surfaced when the next operation is requested.
if (linkException.IsConsumerPartitionStolenException())
{
EventHubsEventSource.Log.AmqpConsumerLinkFaultCapture(EventHubName, ConsumerGroup, PartitionId, linkException.Message);
_activePartitionStolenException = linkException;
}
}
// Close the link and it's associated session.
link.Session?.SafeClose();
link.SafeClose();
EventHubsEventSource.Log.FaultTolerantAmqpObjectClose(nameof(ReceivingAmqpLink), "", EventHubName, ConsumerGroup, PartitionId, link.TerminalException?.Message);
}
public void CloseConsumerLinkIgnoresGeneralExceptions(Exception terminalException)
{
var eventHub = "fake-hub";
var link = new ReceivingAmqpLink(new AmqpLinkSettings());
var mockConsumer = new MockAmqpConsumer(eventHub, true, terminalException);
try
{
mockConsumer.InvokeCloseConsumerLink(link);
Assert.That(GetActivePartitionStolenException(mockConsumer), Is.Null);
}
finally
{
link?.SafeClose();
}
}
public void CloseConsumerLinkDetectsAStolenPartition()
{
var eventHub = "fake-hub";
var terminalException = new AmqpException(new Error {
Condition = AmqpErrorCode.Stolen
});
var link = new ReceivingAmqpLink(new AmqpLinkSettings());
var mockConsumer = new MockAmqpConsumer(eventHub, true, terminalException);
try
{
mockConsumer.InvokeCloseConsumerLink(link);
Assert.That(GetActivePartitionStolenException(mockConsumer), Is.SameAs(terminalException));
}
finally
{
link?.SafeClose();
}
}
internal void SafeClose()
{
_receivingAmqpLink.SafeClose();
}
private void CloseLink(ReceivingAmqpLink link)
{
link.Session?.SafeClose();
link.SafeClose();
}