Rotor

rotor is event loop friendly C++ actor micro framework.

features

MIT

Please read tutorial, design principles and manual here

[improvement] registy actor was added to allow via name/address runtime matching do services discovery
[improvement, breaking] minor changes in supervisor behavior: now it is considered initialied when all its children confirmed initialization
[improvement] supervisor_policy_t was introduced to control supervisor behavior on a child-actor startup failure
[example] examples/ev/pong-registry.cpp how to use registry
[doc] patterns/Registry was added

[improvement] response can be inherited from rotor::arc_base, to allow forwarding requests without copying it (i.e. just intrusive pointer is created)
[example] examples/boost-asio/beast-scrapper.cpp has been added; it demonstrates an app with pool of actor workers with request-response forwarding

[improvement] the request-response approach is integrated to support basic reliable messaging: response notification failure will be delivered, if the expected response will not arrive in-time
[improvement] lambda subscribiers are supported
[improvement] actor behavior has been introduced to offload actor's interface
[breaking] supervisor is constructed with help of supervisor_config_t, which contains shutdown timeout value
[breaking] supervisor does not spawns timeout timer for overall shutdown procedure, instead per-child timers are spawned. The root supervisor the same way monitors child-supervisor shut down
[breaking] supervisor create_actor method now takes child max init time value. If it does not confirm, the child actor will be asked for shut down.
[breaking] shutdown request sent to an child actor now timeout-tracked by supervisor. The message type has changed to message::shutdown_request_t
[breaking] init request sent to an child actor now timeout-tracked by supervisor. The message type has changed to message::init_request_t
[breaking] actor's state request message type now message::state_request_t, which follows the generic request/response pattern. The response type is now message::state_response_t.
[breaking] {asio, ev, ws} supervisor configs are renamed to have corresponding suffix.

[improvement] locality notion was introduced, which led to possibilty to build superving trees, see blog-cpp-supervisors
[breaking] the outbound field in rotor::supervisor_t was renamed just to queue
[breaking] rotor::address_t now contains const void* locality
[breaking] rotor::asio::supervisor_config_t now contains std::shared_ptr to strand, instead of creating private strand for each supervisor
[bugfix] redundant do_start() method in rotor::supervisor_t was removed, since supervisor now is able to start self after compliting initialization.
[bugfix] rotor::supervisor_t sends initialize_actor_t to self to advance own state to INITIALIZED via common actor mechanism, instead of changeing state directly on early initialization phase (do_initialize)
[bugfix] rotor::asio::forwarder_t now more correctly dispatches boost::asio events to actor methods
[bugfix] rotor::ev::supervisor_ev_t properly handles refcounter

Initial version