Snapshot Expiration

[marco.testa]

Hi Edward,

Currently there is not such a function like a snapshot expiration, but it will be introduced in the next upcoming Lightstreamer release, expected for the first months of next year.
For now you can use a workaround depending on the management mode. For instance, in MERGE mode the adapter may send an ItemEvent with blank field, overriding the Item state containing bad data.
In COMMAND mode the adapter may send an UPDATE or even a DELETE, removing the key from the snapshot.
For DISTINCT mode the workaround is actually more cumbersome since the only way to remove an ItemEvent from the snapshot is to add new ItemEvents until the bad ItemEvent is dropped from the snapshot buffer.

hth,
Marco