Akka.NET v1.5.42 contains several bug fixes and also adds new quality of life features to `Akka.IO.Tcp`, `Akka.Persistence`, `Akka.Pattern`, and `Akka.Cluster.Tools.DistributedPubSub`. * [IO.Tcp: Cleanup API](https://github.com/akkadotnet/akka.net/pull/7621) * [IO.Tcp: Fix `TcpListener` connection queue problem](https://github.com/akkadotnet/akka.net/pull/7621) * [Persistence: Allow user to use supervision strategy on journal and snapshot store](https://github.com/akkadotnet/akka.net/pull/7595) * [Core: Add cancellation token to `CircuitBreaker` API to signal timed out operations](https://github.com/akkadotnet/akka.net/pull/7624) * [Persistence: Change all `CircuitBreaker` protected method API to use cancellation token](https://github.com/akkadotnet/akka.net/pull/7624) * [Core: Leverage Exception...when pattern](https://github.com/akkadotnet/akka.net/pull/7614) * [IO.Tcp: Add `TcpListenerStatistics` and subscription methods](https://github.com/akkadotnet/akka.net/pull/7633) * [Cluster.Tools: Modernize `DistributedPubSub` code](https://github.com/akkadotnet/akka.net/pull/7640) * [Cluster.Tools: Optimize `DistributedPubSub` memory allocation](https://github.com/akkadotnet/akka.net/pull/7642) * [Cluster.Tools: Improve `DistributedPubSub` `DeadLetter` log message](https://github.com/akkadotnet/akka.net/pull/7646) * [Core: Refactor immutable collection builders to use simpler `CreateBuilder` pattern](https://github.com/akkadotnet/akka.net/pull/7656) * [IO.Tcp: Redesign `TcpConnection`](https://github.com/akkadotnet/akka.net/pull/7637) * [Cluster.Tools: Add `PublishWithAck` feature to `DistributedPubSub`](https://github.com/akkadotnet/akka.net/pull/7652) > [!WARNING] > > This release contains several public API breaking changes to Akka.IO.Tcp and Akka.Persistence **Akka.Pattern.CircuitBreaker** Backward compatible API changes: * New `.WithCircuitBreaker()` APIs were added that changes the protected function delegate to accept a new `CancellationToken` argument. * Old `.WithCircuitBreaker()` APIs were marked as obsolete. **Akka.Cluster.Tools.DistributedPubSub** The documentation for the new `PublishWithAck` feature can be read [here](https://getakka.net/articles/clustering/distributed-publish-subscribe.html#publishwithack) Backward compatible API changes: * There is a new `DistributedPubSubSettings` constructor that leverages the new `PublishWithAck` feature. The old constructor is marked as obsolete. **Akka.Persistence** The documentation for the new supervision strategy for journal and snapshot-store feature can be read [here](https://getakka.net/articles/persistence/storage-plugins.html#controlling-journal-or-snapshot-crash-behavior) Breaking API changes: Due to changes in `CircuitBreaker.WithCircuitBreaker()` APIs, several `Akka.Persistence` journal and snapshot-store were changed in a breaking manner. You will need to consider these changes if you have your own specific `Akka.Persistence` plugin implementation and needed to upgrade to this version of Akka. * AsyncWriteJournal * `DeleteMessagesToAsync()` * `ReadHighestSequenceNrAsync()` * `WriteMessagesAsync` * SnapshotStore * Both `DeleteAsync()` methods * `LoadAsync()` * `SaveAsync()` **Akka.IO.Tcp** The Akka.IO.Tcp has been redesigned to improve its reliability, visibility, and performance. This, unfortunately, requires some breaking changes to be introduced into the code base. New features: * The `TcpListener` actor now accepts a new `SubscribeToTcpListenerStats` message. Subscribers will receive regular `TcpListenerStatistics` metrics report from the `TcpListener`. * The new `UnsubscribeFromTcpListenerStats` message can be used to unsubscribe from the `TcpListener` Backward compatible changes: * The `Akka.IO.Tcp.Bind` command now contain a new settable `TcpSettings` property. * The `Akka.IO.Tcp.Connect` command now contain a new settable `TcpSettings` property. * The `Akka.IO.TcpSettings` class have several of its unused properties deprecated and/or changed: * The `ReceivedMessageSizeLimit` property has been deprecated, replaced with the new `MaxFrameSizeBytes` property. * New `ReceiveBufferSize` property added. * New `SendBufferSize` property added. Breaking API changes: * `Akka.IO.Tcp.Instance` static field has been removed. * `Akka.IO.TcpExt.BufferPool` static property has been removed. To [see the full set of changes in Akka.NET v1.5.42, click here](https://github.com/akkadotnet/akka.net/milestone/125?closed=1). 5 contributors since release 1.5.41 | COMMITS | LOC+ | LOC- | AUTHOR | |---------|------|------|---------------------| | 15 | 3480 | 2864 | Aaron Stannard | | 5 | 1711 | 713 | Gregorius Soedharmo | | 4 | 72 | 100 | Simon Cropp | | 1 | 172 | 51 | Arjen Smits | | 1 | 16 | 60 | JuYoung Kim |