public void Cursor_should_unpin_connection_for_operations_under_the_same_transaction_after_abortTransaction_and_cursor_dispose(
[Values(1, 3)] int attempts,
[Values(false, true)] bool forceCursorClose,
[Values(false, true)] bool async)
{
SkipIfNotLoadBalancingMode();
KillOpenTransactions();
SetupData();
var eventCapturer = new EventCapturer()
.Capture <ConnectionPoolCheckedOutConnectionEvent>()
.Capture <ConnectionPoolCheckingOutConnectionEvent>()
.Capture <ConnectionPoolCheckedInConnectionEvent>()
.Capture <ConnectionPoolCheckingInConnectionEvent>()
.Capture <CommandSucceededEvent>();
List <IAsyncCursor <BsonDocument> > cursors = new();
using (var cluster = CreateLoadBalancedCluster(eventCapturer))
{
eventCapturer.Clear();
ICoreSessionHandle session;
DisposableBindingBundle <IReadBindingHandle, RetryableReadContext> readBindingsBundle = null;
using (session = CreateSession(cluster, isImplicit: false, withTransaction: true))
{
for (int i = 1; i <= attempts; i++)
{
AssertSessionReferenceCount(session, i); // dynamic value because we don't close cursors in the loop
IAsyncCursor <BsonDocument> asyncCursor;
eventCapturer.Any().Should().BeFalse();
using (readBindingsBundle = CreateReadBindingsAndRetryableReadContext(cluster, session.Fork(), async))
{
AssertCheckOutOnlyEvents(eventCapturer, i, shouldNextAttemptTriggerCheckout: false);
asyncCursor = CreateAndRunFindOperation(readBindingsBundle.RetryableContext, async);
AssertCommand(eventCapturer, "find", noMoreEvents: true);
}
MoveNext(asyncCursor, async).Should().BeTrue(); // no op
MoveNext(asyncCursor, async).Should().BeTrue();
AssertCommand(eventCapturer, "getMore", noMoreEvents: true);
cursors.Add(asyncCursor);
}
AbortTransaction(session, async);
AssertCommand(eventCapturer, "abortTransaction", noMoreEvents: true);
}
for (int i = 0; i < cursors.Count; i++)
{
IAsyncCursor <BsonDocument> cursor = cursors[i];
if (forceCursorClose)
{
cursor.Dispose();
}
else
{
var exception = Record.Exception(() => cursor.MoveNext());
exception
.Should()
.BeOfType <MongoCommandException>()
.Subject
.Message
.Should()
.StartWith("Command getMore failed: Cannot run getMore on cursor")
.And
.EndWith("without a txnNumber.");
cursor.Dispose();
}
AssertCommand(eventCapturer, "killCursors", noMoreEvents: i < cursors.Count - 1);
}
AssertCheckInOnlyEvents(eventCapturer);
AssertSessionReferenceCount(session, 0);
AssertChannelReferenceCount(readBindingsBundle.RetryableContext.Channel, 0);
}
}
public void Cursor_should_pin_connection_in_transaction_with_the_same_session_as_expected(
[Values(1, 4)] int attempts,
[Values(false, true)] bool forceCursorClose,
[Values(false)] bool async)
{
SkipIfNotLoadBalancingMode();
KillOpenTransactions();
SetupData();
var eventCapturer = new EventCapturer()
.Capture <ConnectionPoolCheckedOutConnectionEvent>()
.Capture <ConnectionPoolCheckingOutConnectionEvent>()
.Capture <ConnectionPoolCheckedInConnectionEvent>()
.Capture <ConnectionPoolCheckingInConnectionEvent>()
.Capture <CommandSucceededEvent>();
List <IAsyncCursor <BsonDocument> > cursors = new();
using (var cluster = CreateLoadBalancedCluster(eventCapturer))
{
eventCapturer.Clear();
ICoreSessionHandle session;
DisposableBindingBundle <IReadBindingHandle, RetryableReadContext> readBindingsBundle = null;
using (session = CreateSession(cluster, isImplicit: false, withTransaction: true))
{
for (int i = 1; i <= attempts; i++)
{
AssertSessionReferenceCount(session, i); // dynamic value because we don't close cursors in the loop
IAsyncCursor <BsonDocument> asyncCursor;
eventCapturer.Any().Should().BeFalse();
using (readBindingsBundle = CreateReadBindingsAndRetryableReadContext(cluster, session.Fork(), async))
{
AssertCheckOutOnlyEvents(eventCapturer, i, shouldNextAttemptTriggerCheckout: false);
asyncCursor = CreateAndRunFindOperation(readBindingsBundle.RetryableContext, async);
AssertCommand(eventCapturer, "find", noMoreEvents: true);
}
MoveNext(asyncCursor, async).Should().BeTrue(); // no op
MoveNext(asyncCursor, async).Should().BeTrue();
AssertCommand(eventCapturer, "getMore", noMoreEvents: true);
cursors.Add(asyncCursor);
}
}
for (int i = 0; i < cursors.Count; i++)
{
IAsyncCursor <BsonDocument> cursor = cursors[i];
if (forceCursorClose)
{
cursor.Dispose();
AssertCommand(eventCapturer, "killCursors", noMoreEvents: i < cursors.Count - 1);
}
else
{
MoveNext(cursor, async).Should().BeTrue(); // returns cursorId = 0
MoveNext(cursor, async).Should().BeFalse();
AssertCommand(eventCapturer, "getMore", noMoreEvents: i < cursors.Count - 1);
}
}
AssertCommand(eventCapturer, "abortTransaction", noMoreEvents: false);
AssertCheckInOnlyEvents(eventCapturer);
AssertSessionReferenceCount(session, 0);
AssertChannelReferenceCount(readBindingsBundle.RetryableContext.Channel, 0);
}
}