getSnapshotMsgId

getSnapshotMsgId(engine)

engine is a built-in streaming engine, i.e., the abstract table object return by functions such as createReactiveStateEngine.

Get the message ID (msgId) of the last snapshot of the specified streaming engine when resubscibing after an interruption of subscription. If snapshot is enabled, during resubscription the parameter offset of function subscribeTable is set to getSnapshotMsgId(engine)+1. The streaming engine will load the snapshot and start to subcribe from the next message after getSnapshotMsgId(engine).