Lock

The Lock interceptor enforces exclusive/shared access on VChannel or PChannel scope during append, preventing concurrent conflicting operations.

Lock Levels

• PChannel-level: A global RWMutex. Exclusive lock blocks all appends on the entire PChannel; shared lock allows concurrent appends.
• VChannel-level: A per-key RWMutex. Exclusive lock blocks appends on a specific VChannel; shared lock allows concurrent appends to the same VChannel.

See Message Semantic Docs for per-message lock requirements.

Key Packages

• internal/streamingnode/server/wal/interceptors/lock/ — lockAppendInterceptor, builder