* ⇒, →, ←
* because we don't want to show them in documentation snippets and
then it's complicated to avoid that when snippets are
located in src/test/scala in individual modules
* dont replace object `→` in FSM.scala and PersistentFSM.scala
* Add CopyrightHeader support for sbt-boilerplate plugin.
* Add CopyrightHeader support for `*.proto` files.
* Add regex match for both `–` and `-` for CopyrightHeader.
* Add CopyrightHeader support for sbt build files.
* Update copyright from 2018 to 2019.
(cherry picked from commit 89af8bdb90)
* remove final identifier in serializers
i* revert/deprecate ProtobufSerializer.ARRAY_OF_BYTE_ARRAY
* adding back compatible empty constructor in serializers
* make FSM.State compatible
* add back ActorPath.ElementRegex
* revert SocketOption changes and add SocketOptionV2
see a6d3704ef6
* problem filter for ActorSystem and ActorPath
* problem filter for ByteString
* problem filter for deprecated Timeout methods
* BalancingPool companion
* ask
* problem filter for ActorDSL
* event bus
* exclude hasSubscriptions
* exclude some problems in testkit
* boundAddress and addressFromSocketAddress
* Pool nrOfInstances
* PromiseActorRef
* check with 2.3.9
* migration guide note
* explicit exclude of final class problems
Instead of isTerminated we now use death watch on subscribers.
! Breaking change - ActorClassification based event buses now require
and actor system. Previously no actors were involved, but now someone
has to `watch` the subscribers. The unsubscriber is an system actor,
and won't be stopped automagically if a bus stops to be used (hard to
determine what "stops being used" is)
* Replaced isTerminated checks with watching actors
* backing structure for ActorClassification swaped from
ConcurrentHashMap to immutable.Map with CAS operations on it. This is
required to avoid races and guarantee register/unregister ordering
(messages sent with proper sequence numbers) to the unsubscriber.
Performance tested it and still above 1.3million subscribe+unsubscribe
ops per second (mac i7, retina), where as the CHM version was
4 million - but that one could only work in the presence of
itTerminated - so we pay the price here for removing it.
* `ActorClassification` starts the unsubscriber instance by itself,
the unsubscriber is an system actor, and can be stopped via
`ActorClassification#shutdown`
* Will unregister from unsubscriber, when no more subscriptions for
given subscriber are left in this bus.
* Added missing "Java API: " for some types
* Updated docs to point out the automatic subscriber purging (on terminated)
* Moved to removing actors proactively when they are terminated instead of
checking `isTerminated` during publish.
* Subscribers which have registered before initializing the unsubscriber
will be aggregated in a Seq until one is registered and then it will
take responsibility of unregistering them on termination.
* Initialization of the unsubscriber can only be run once - attempting
to initialize the event stream with another unsubscriber will fail,
and init will return false.
* Assumed having an init (mutable) method on the `EventBus` is fine, as
it has such methods already and @patriknw's comment in the task for
this.
* since we must check if the subscriber has any subscribed channels left
we had to expose this detail from SubchannelClassification via
`hasSubscriptions`. Increases cost of ubsubscribe(actor, channel) a bit.
* Evacuated the expensive `hasSubscription` call out of eventstream's `unsubscribe` call, and instead making the Unsubscriber check this before it stops watching an actor. If in the mean time the same actor got subscribed, there will be a new Subscribe message emited - so we're good on that side. Also, if it would terminate before the unsubscriber gets the Register message it will call `watch(actor)` on a dead actor, which results in getting Terminated for it, thus we'll stop watching it from the Unsubscriber as expected.
Final squash and small cleanup. Please review again;
BalancingDispatcherModelSpec is currently broken, leaves count==1 in
wavesOfActors test, committed anyway in order to check out where it
broke before this merge
most tests passing, everything compiling, but docs not updated and nasty
thread-leak preventing me from running the whole test-suite (which is
the reason for this commit: I want to chase down that one first).
- the app.mainbus is classified by Class[_] (currently lookup, will
possibly change to sub-class-aware) and accepts AnyRef messages
- LoggingBus handles akka.event-handlers from config specially:
+ start them as system services, supervised by SystemGuardian
+ keep their subscriptions in sync when logLevel_= is called
+ send them InitializeLogger(bus) message before subscribing them (so
they can register for extras like Mute/UnMute)
- two-phased start-up: first phase with actor-less stdout logging, then
subscription of config loggers, then remove stdout logger (logLevels
configurable separately)
- MainBusReaper watches registered receivers and unsubscribes them upon
death (started in phase 2)
- logger factory on Logging object, needs app/bus and log source;
default instance in app.log
