Akka v2.4.5_2.12-M4 发布了，Akka 是一个用 Scala 编写的库，用于简化编写容错的、高可伸缩性的 Java 和 Scala 的 Actor 模型应用。 本次发布值得关注的内容： The cluster client and the cluster client receptionist now allow for subscribers to which the changes to the current set of contacts or clients will be announced. (#20446) FileIO streams factory methods using java.nio.Path added and the old File (#20390) A bug in the Akka scheduler making it stop running scheduled events in a long lived actor system (#20424), thanks to ecartner for finding and reproducing this issue Registration of custom MediaTypes for Akka HTTP (#20397) Scala Routing DSL’s (experimental) Rest path matcher was changed to be Remaining to be more consistent with other parts of the routing DSL 下载地址：http://akka.io/downloads/ Akka v2.4.5_2.12-M4 发布，Actor 模型开发库下载地址
