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feat(correlation): add configurable delay before emitting orphan A events

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New feature: Apache events can now wait for B events before being emitted as orphans.

Changes:
- Add ApacheEmitDelayMs config (default: 500ms)
- Add pendingOrphans structure for delayed emission
- processSourceA(): add A to pending orphans instead of immediate emission
- processSourceB(): check pending orphans before buffer A
- emitPendingOrphans(): emit orphans after delay expires
- Flush(): emit all pending orphans immediately (shutdown)

Configuration:
correlation:
  orphan_policy:
    apache_always_emit: true
    apache_emit_delay_ms: 500  # Wait 500ms before emitting as orphan

Backward compatibility:
- apache_emit_delay_ms: 0 → immediate emission (legacy mode)
- apache_emit_delay_ms < 0 → default 500ms

Tests added (5 new tests):
- TestCorrelationService_ApacheEmitDelay_BArrivesDuringDelay
- TestCorrelationService_ApacheEmitDelay_NoBArrives
- TestCorrelationService_ApacheEmitDelay_ZeroDelay
- TestCorrelationService_ApacheEmitDelay_MultipleA_SameKey
- TestCorrelationService_ApacheEmitDelay_Flush

All 30 tests pass. Coverage: 75.1%

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>
This commit is contained in:
toto
2026-03-03 22:03:31 +00:00
parent 97862bb1dc
commit e0c622f635
5 changed files with 431 additions and 26 deletions
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1
config.example.yml
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@ -48,6 +48,7 @@ correlation:
# Orphan policy: what to do when no match is found
orphan_policy:
apache_always_emit: true # Always emit A events, even without B match
apache_emit_delay_ms: 500 # Wait 500ms before emitting as orphan (allows B to arrive)
network_emit: false # Never emit B events alone
# Matching mode: one_to_one or one_to_many (Keep-Alive)