syncbase/server/watchable: watch enhancements
Various enhancements to the watchable store and its use by sync:
* Add the ability to mark whether a transaction is make by sync
vs applications. This allows sync to filter out its own updates
(echo suppression) from the watch log.
* Add the ability for sync to inject into the watch log snapshot
entries to initialize DAG metadata when a SyncGroup is created
or joined. These entries act as fake-puts that sync uses but
the future app-watch API will filter out.
* Change the key of watch log entries to use one sequence number
and update the tests accordingly.
* Make ACLs managed (versioned) keys.
* Improve testing of sync watcher and refactor some code.
Change-Id: I02f6af04c995c5a5b17857c6213b51b6e38dcf13
15 files changed
