diff options
-rw-r--r-- | src/rabbit_variable_queue.erl | 69 |
1 files changed, 32 insertions, 37 deletions
diff --git a/src/rabbit_variable_queue.erl b/src/rabbit_variable_queue.erl index 365d668f..07d30518 100644 --- a/src/rabbit_variable_queue.erl +++ b/src/rabbit_variable_queue.erl @@ -1298,44 +1298,39 @@ maybe_deltas_to_betas(State = #vqstate { q3 = Q3, index_state = IndexState, transient_threshold = TransientThreshold }) -> - case bpqueue:is_empty(Q3) of - false -> - State; - true -> - #delta { start_seq_id = DeltaSeqId, - count = DeltaCount, - end_seq_id = DeltaSeqIdEnd } = Delta, - DeltaSeqId1 = - lists:min([rabbit_queue_index:next_segment_boundary(DeltaSeqId), - DeltaSeqIdEnd]), - {List, IndexState1} = - rabbit_queue_index:read(DeltaSeqId, DeltaSeqId1, IndexState), - {Q3a, IndexState2} = betas_from_index_entries( - List, TransientThreshold, IndexState1), - State1 = State #vqstate { index_state = IndexState2 }, - case bpqueue:len(Q3a) of + #delta { start_seq_id = DeltaSeqId, + count = DeltaCount, + end_seq_id = DeltaSeqIdEnd } = Delta, + DeltaSeqId1 = + lists:min([rabbit_queue_index:next_segment_boundary(DeltaSeqId), + DeltaSeqIdEnd]), + {List, IndexState1} = + rabbit_queue_index:read(DeltaSeqId, DeltaSeqId1, IndexState), + {Q3a, IndexState2} = + betas_from_index_entries(List, TransientThreshold, IndexState1), + State1 = State #vqstate { index_state = IndexState2 }, + case bpqueue:len(Q3a) of + 0 -> + %% we ignored every message in the segment due to it being + %% transient and below the threshold + maybe_deltas_to_betas( + State1 #vqstate { + delta = Delta #delta { start_seq_id = DeltaSeqId1 }}); + Q3aLen -> + Q3b = bpqueue:join(Q3, Q3a), + case DeltaCount - Q3aLen of 0 -> - %% we ignored every message in the segment due to - %% it being transient and below the threshold - maybe_deltas_to_betas( - State1 #vqstate { - delta = Delta #delta { start_seq_id = DeltaSeqId1 }}); - Q3aLen -> - Q3b = bpqueue:join(Q3, Q3a), - case DeltaCount - Q3aLen of - 0 -> - %% delta is now empty, but it wasn't - %% before, so can now join q2 onto q3 - State1 #vqstate { q2 = bpqueue:new(), - delta = ?BLANK_DELTA, - q3 = bpqueue:join(Q3b, Q2) }; - N when N > 0 -> - Delta1 = #delta { start_seq_id = DeltaSeqId1, - count = N, - end_seq_id = DeltaSeqIdEnd }, - State1 #vqstate { delta = Delta1, - q3 = Q3b } - end + %% delta is now empty, but it wasn't before, so + %% can now join q2 onto q3 + State1 #vqstate { q2 = bpqueue:new(), + delta = ?BLANK_DELTA, + q3 = bpqueue:join(Q3b, Q2) }; + N when N > 0 -> + Delta1 = #delta { start_seq_id = DeltaSeqId1, + count = N, + end_seq_id = DeltaSeqIdEnd }, + State1 #vqstate { delta = Delta1, + q3 = Q3b } end end. |