Module `Worker.MakeSingle`Source

MakeSingle (Name) (Request) (Types) is the same as using MakeGroup and then MakeWorker. It's a special case which you can use if you only ever need a single instantiation.

Parameters

module Name : Tezos_base.Worker_intf.NAME

module Request : Tezos_base.Worker_intf.REQUEST

module Types : Tezos_base.Worker_intf.TYPES

Signature

module Name = Name

module Request = Request

module Types = Types

Sourcetype 'kind t

A handle to a specific worker, parameterized by the type of internal message buffer.

Sourcetype 'kind table

A handle to a table of workers.

Sourcetype 'a queue

Internal buffer kinds used as parameters to t.

Sourceand bounded

Sourceand infinite

Sourcetype dropbox

Sourcetype 'a message_error =

| Closed of Tezos_base.TzPervasives.error list option
| Request_error of 'a
| Any of exn

An error returned when waiting for a message pushed to the worker. Closed errs is returned if the worker is terminated or has crashed. If the worker is terminated, errs is an empty list. Request_error err is returned if the request failed with an error. Any exn is returned if the request failed with an exception.

Sourcetype _ buffer_kind =

| Queue : infinite queue buffer_kind
| Bounded : {
1. size : int;
} -> bounded queue buffer_kind
| Dropbox : {
1. merge : dropbox t -> any_request -> any_request option -> any_request option;
} -> dropbox buffer_kind

Supported kinds of internal buffers.

Sourceand any_request =

| Any_request : (_, _) Request.t -> any_request

Sourceval create_table : 'kind buffer_kind -> 'kind table

Create a table of workers.

Sourcemodule type HANDLERS = sig ... end

The callback handlers specific to each worker instance.

Source

val launch : 
  'kind table ->
  ?timeout:Tezos_base.Time.System.Span.t ->
  Name.t ->
  Types.parameters ->
  (module HANDLERS
    with type launch_error = 'launch_error
     and type self = 'kind t) ->
  ('kind t, 'launch_error) result Lwt.t

Creates a new worker instance. Parameter queue_size not passed means unlimited queue.

Sourceval shutdown : _ t -> unit Lwt.t

Triggers a worker termination and waits for its completion. Cannot be called from within the handlers.

Sourcemodule type BOX = sig ... end

The following interface are common elements of multiple modules below. They are used to minimize repetition.

Sourcemodule type QUEUE = sig ... end

Sourcemodule Dropbox : sig ... end

Sourcemodule Queue : sig ... end

Sourceval canceler : _ t -> Lwt_canceler.t

Exports the canceler to allow cancellation of other tasks when this worker is shutdown or when it dies.

Sourceval trigger_shutdown : _ t -> unit

Triggers a worker termination.

Sourceval state : _ t -> Types.state

Access the internal state, once initialized.

Source

val with_state : 
  _ t ->
  (Types.state -> (unit, 'request_error) result Lwt.t) ->
  (unit, 'request_error) result Lwt.t

with_state w f calls f on the current state of worker w if it was intialized and not closed or crashed, otherwise returns immediately.

Source

val pending_requests : 
  _ queue t ->
  (Tezos_base.Time.System.t * Request.view) list

Introspect the message queue, gives the times requests were pushed.

Sourceval status : _ t -> Tezos_base.Worker_types.worker_status

Get the running status of a worker.

Source

val current_request : 
  _ t ->
  (Tezos_base.Time.System.t * Tezos_base.Time.System.t * Request.view) option

Get the request being treated by a worker. Gives the time the request was pushed, and the time its treatment started.

Sourceval information : _ t -> Tezos_base.Worker_types.worker_information

Sourceval list : 'a table -> (Name.t * 'a t) list

Lists the running workers in this group.

Sourceval find_opt : 'a table -> Name.t -> 'a t option

find_opt table n is Some worker if the worker is in the table and has name n.

Install

Dune Dependency

Authors

Maintainers

Sources

doc/octez-libs.tezos-workers/Tezos_workers/Worker/MakeSingle/index.html

Module `Worker.MakeSingle`Source

Parameters

Signature

package octez-libs

Install

Dune Dependency

Authors

Maintainers

Sources

doc/octez-libs.tezos-workers/Tezos_workers/Worker/MakeSingle/index.html

Module Worker.MakeSingleSource

Parameters

Signature

Module `Worker.MakeSingle`Source