View Source Cloister.Monitor (cloister v0.9.0)
The actual process that performs the monitoring of the cluster and invokes callbacks.
This process is started and supervised by Cloister.Manager
.
Link to this section Summary
Types
Group of nodes sharing the same hashring
Type of the node as it has been started
Statuses the node running the code might be in regard to cloister
The monitor internal state
Functions
Returns a specification to start this module under a supervisor.
Rehashes the ring and returns the current state
Returns the nodes in the cluster that are connected to this one in the same group
Used to start Cloister.Monitor
.
Returns an internal state of the Node
Link to this section Types
Group of nodes sharing the same hashring
@type node_type() :: :longnames | :shortnames | :nonode
Type of the node as it has been started
@type status() :: :down | :starting | :joined | :up | :stopping | :rehashing | :panic
Statuses the node running the code might be in regard to cloister
@type t() :: %Cloister.Monitor{ otp_app: atom(), groups: [group()], listener: module(), started_at: DateTime.t(), status: status(), alive?: boolean(), clustered?: boolean(), sentry?: boolean(), ring: atom() }
The monitor internal state
Link to this section Functions
Returns a specification to start this module under a supervisor.
See Supervisor
.
@spec nodes!(timeout :: non_neg_integer()) :: t()
Rehashes the ring and returns the current state
@spec siblings() :: [node()]
Returns the nodes in the cluster that are connected to this one in the same group
@spec start_link(opts :: keyword()) :: GenServer.on_start()
Used to start Cloister.Monitor
.
Internally called by Cloister.Manager.start_link/1
. In most cases
you don’t need to start Monitor
process explicitly.
@spec state() :: t()
Returns an internal state of the Node