caf::mixin::requester< Base, Subtype > Class Template Reference

A requester is an actor that supports self->request(...). More...

#include <requester.hpp>

Inherits Base.

Public Types
using	extended_base = requester

Public Member Functions
template<message_priority P = message_priority::normal, class Rep = int, class Period = std::ratio<1>, class Handle = actor, class... Ts>
auto	request (const Handle &dest, std::chrono::duration< Rep, Period > timeout, Ts &&... xs)
	Sends {xs...} as a synchronous message to dest with priority mp.
template<template< class > class MergePolicy, message_priority Prio = message_priority::normal, class Rep = int, class Period = std::ratio<1>, class Container , class... Ts>
auto	fan_out_request (const Container &destinations, std::chrono::duration< Rep, Period > timeout, Ts &&... xs)
	Sends {xs...} to each actor in the range destinations as a synchronous message.

Detailed Description

template<class Base, class Subtype>
class caf::mixin::requester< Base, Subtype >

A requester is an actor that supports self->request(...).

{then|await|receive}.

Member Function Documentation

fan_out_request()

template<class Base , class Subtype >

template<template< class > class MergePolicy, message_priority Prio = message_priority::normal, class Rep = int, class Period = std::ratio<1>, class Container , class... Ts>

auto caf::mixin::requester< Base, Subtype >::fan_out_request	(	const Container &	destinations,
		std::chrono::duration< Rep, Period >	timeout,
		Ts &&...	xs )

Sends {xs...} to each actor in the range destinations as a synchronous message.

Response messages get combined into a single result according to the MergePolicy.

Template Parameters

MergePolicy	Configures how individual response messages get combined by the actor. The policy makes sure that the response handler gets invoked at most once. In case of one or more errors, the policy calls the error handler exactly once, with the first error occurred.
Prio	Specifies the priority of the synchronous messages.
Container	A container type for holding actor handles. Must provide the type alias value_type as well as the member functions begin(), end(), and size().

Parameters

destinations	A container holding handles to all destination actors.
timeout	Maximum duration before dropping the request. The runtime system will send an error message to the actor in case the receiver does not respond in time.

Returns

A helper object that takes response handlers via .await(), .then(), or .receive().

Note

The returned handle is actor-specific. Only the actor that called request can use it for setting response handlers.

request()

template<class Base , class Subtype >

template<message_priority P = message_priority::normal, class Rep = int, class Period = std::ratio<1>, class Handle = actor, class... Ts>

auto caf::mixin::requester< Base, Subtype >::request	(	const Handle &	dest,
		std::chrono::duration< Rep, Period >	timeout,
		Ts &&...	xs )

Sends {xs...} as a synchronous message to dest with priority mp.

Returns

A handle identifying a future-like handle to the response.

Warning

The returned handle is actor specific and the response to the sent message cannot be received by another actor.

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The documentation for this class was generated from the following file:

• libcaf_core/caf/mixin/requester.hpp