Class type Nn_state.view_t

class type view_t = object .. end

A view is a high-level transaction, involving both the local db and the slaves

method pre_commit : journal

Prepares the commit, and returns the journal to commit. This method is called before the monitored commit section starts.

method pre_commit_mon : journal

Prepares the commit, and returns additional journal entries to commit. This method is called before and at the beginning of the monitored commit section (i.e. twice)

method post_commit : bool -> unit

Needs to be called after a commit. post_commit true if the commit was successful, and commit_commit false if not. This is important for updating the state of caches: In the first case cache modifications are made permanent, in the second case they are undone.

method rollback : unit -> unit

Rolls this view back