Module Nn_state

module Nn_state: sig .. end

State manager: Provide the logical view of the state, and forward changes to the database and to the nameslaves (2-phase commit)

---

type errno = Plasma_util.errno 

exception Transaction_error of errno

type owner 

val create_owner : unit -> owner

val string_of_owner : owner -> string

class type shared_state_t = object .. end

type sh_state_shm 

type journal = Nn_db.modification Queue.t 

class type view_t = object .. end

class type ds_view_t = object .. end

class type bm_view_t = object .. end

class type inode_view_t = object .. end

The following classes are used as follows: First, a shared_state is created. This object is passed on as arguments to the view objects. The views, if all connected with the same shared_state, can be committed in one go (in Nn_commit).

val sh_state_shm : Netmcore.res_id -> int -> string -> sh_state_shm

class shared_state : Unixqueue.event_system -> Nn_config.nn_node_config -> Pfs_auth.client_auth -> sh_state_shm -> shared_state_t

class ds_view : shared_state_t -> ds_view_t

class bm_view : shared_state_t -> bm_view_t

class inode_view : shared_state_t -> inode_view_t

val encap_time : float -> Pfs_rpcapi_aux.time

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