* Add scalafix plugin for jdk 9.
* Add command alias sortImports.
* Excludes some sources from SortImports.
* Update SortImports to 0.4.0
* Sort imports with `sortImports` command.
* Replace MaterializerSettings with Attributes #25559
* Field access to settings deprecated to make stages use attributes instead
* Internal stages updated to use attributes
* Docs on ActorMaterializerSettings updated to recommend away from using it
* Verify all stages stopped after each testcase in FlowGroupBySpec
* Subscription timeout attributes merged into one
* ⇒, →, ←
* 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.
* fix memory leak in SystemMessageDelivery
* initial set of tests for idle outbound associations, credit to mboogerd
* close inbound compression when quarantined, #23967
* make sure compressions for quarantined are removed in case they are lingering around
* also means that advertise will not be done for quarantined
* remove tombstone in InboundCompressions
* simplify async callbacks by using invokeWithFeedback
* compression for old incarnation, #24400
* it was fixed by the other previous changes
* also confirmed by running the SimpleClusterApp with TCP
as described in the ticket
* test with tcp and tls-tcp transport
* handle the stop signals differently for tcp transport because they
are converted to StreamTcpException
* cancel timers on shutdown
* share the top-level FR for all Association instances
* use linked queue for control and large streams, less memory usage
* remove quarantined idle Association completely after a configured delay
* note that shallow Association instances may still lingering in the
heap because of cached references from RemoteActorRef, which may
be cached by LruBoundedCache (used by resolve actor ref).
Those are small, since the queues have been removed, and the cache
is bounded.
* Refactoring to separate the Aeron specific things, ArteryAeronUdpTransport
* move Aeron specific classes to akka.remote.artery.aeron package
* move Version to ArterySettings, and describe strategy for envelope header changes
* new SendQueue Source based on agrona ManyToOneConcurrentArrayQueue
* jmh benchmark for send queue
* JMH benchmark for Source.queue, Source.actorRef and the new SendQueue
* inject the queue so that we can start sending to it before materialization
* Get rid of computeIfAbsent in the AssociationRegistry
by making it possible to send (enque) messages to the
Association instance immediatly after construction.
