public override void When()
{
_followers = new [] { Guid.NewGuid(), Guid.NewGuid(), Guid.NewGuid(), Guid.NewGuid() };
BecomeLeader();
// All of the nodes have acked the first write
WriterCheckpoint.Write(_firstLogPosition);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.WriterCheckpointFlushed());
foreach (var follower in _followers)
{
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(follower, _firstLogPosition));
}
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
ReplicatedTos.Clear();
// Followers 3 and 4 are lagging behind, they ack the previous positions
WriterCheckpoint.Write(_secondLogPosition);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.WriterCheckpointFlushed());
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_followers[0], _secondLogPosition));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_followers[1], _secondLogPosition));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_followers[2], _firstLogPosition));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_followers[3], _firstLogPosition));
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
}
public override void When()
{
BecomeLeader();
// All of the nodes have acked the first write
WriterCheckpoint.Write(_firstLogPosition);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.WriterCheckpointFlushed());
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_follower1, _firstLogPosition));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_follower2, _firstLogPosition));
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
ReplicatedTos.Clear();
// Follower 2 has lost connection and does not ack the write
WriterCheckpoint.Write(_secondLogPosition);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.WriterCheckpointFlushed());
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_follower1, _secondLogPosition));
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
}
public override void When()
{
BecomeMaster();
// All of the nodes have acked the first write
WriterCheckpoint.Write(_firstLogPosition);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.WriterCheckpointFlushed());
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_replica1, _firstLogPosition));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_replica2, _firstLogPosition - 100));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(Guid.NewGuid(), _firstLogPosition - 100));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(Guid.NewGuid(), _firstLogPosition - 100));
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
ReplicatedTos.Clear();
WriterCheckpoint.Write(_secondLogPosition);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.WriterCheckpointFlushed());
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_replica1, _secondLogPosition));
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
}
public override void When()
{
BecomeMaster();
WriterCheckpoint.Write(_logPosition);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.WriterCheckpointFlushed());
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_replica1, _logPosition));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_replica2, _logPosition));
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
Service.Handle(new SystemMessage.VNodeConnectionLost(
PortsHelper.GetLoopback(),
Guid.NewGuid(),
_replica1));
ReplicatedTos.Clear();
WriterCheckpoint.Write(_logPosition2);
WriterCheckpoint.Flush();
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_replica2, _logPosition2));
Service.Handle(new ReplicationTrackingMessage.ReplicaWriteAck(_replica3, _logPosition2));
AssertEx.IsOrBecomesTrue(() => Service.IsCurrent());
}