ScopedValue.runWhere(CONTEXT,"Test Value",()->{System.out.println("In parent thread start the scoped value is: "+CONTEXT.get());doSomething();System.out.println("In parent thread end the scoped value is: "+CONTEXT.get());});publicvoiddoSomething(){System.out.println("In doSomething(...
class Server { public final static ScopedValue<User> LOGGED_IN_USER = ScopedValue.newInstance(); private void serve(Request request) { // ... User loggedInUser = authenticateUser(request); ScopedValue.where(LOGGED_IN_USER, loggedInUser) .run(() -> restAdapter.processRequest(r...
private static final ScopedValue<String> NAME = ScopedValue.newInstance(); ScopedValue.runWhere(NAME, "duke", () -> { try (var scope = new StructuredTaskScope<String>()) { scope.fork(() -> childTask1()); scope.fork(() -> childTask2()); scope.fork(() -> childTask3()); .....
如果使用JDK 19,您将无法体验到Scoped Values功能。 1*GQ22_fxZ-eRKk85BBXuHWQ.png 或者直接下载JDK 21的早期访问版本。 1*0hHWnZaMVfsKlVCLjMJUSg.png 如果您使用的是IDEA,则您的IDEA版本必须至少为2022.3或更高版本,否则不支持这样的新JDK版本。 如果您使用的是JDK 19或JDK 20,您应该在项目设置中将语言级...
JEP 446: Scoped Values (Preview) JEP Goals: Enables the sharing of immutable data within and across threads. Related to: [JDK 20] JEP 429: Scoped Values (Incubator) Value: Ease of use — Provides a programming model to share data both within a thread and with child threads, so as...
To solve these problems, Java 20 incubated and Java 21 previews theScoped Values API, which works by binding a value to the ScopedValue instance and passing the code that is allowed to read that value as a lambda—that’s the scope. ...
作用域值也可以在线程内的任何时候获取变量,但它有一个作用域的概念,当超出作用域时将被销毁。 复制 publicclassScopedValueExample{finalstaticScopedValue<String>LoginUser=ScopedValue.newInstance();publicstaticvoidmain(String[]args)throws InterruptedException{ScopedValue.where(LoginUser,"Tom").run(()-...
フィールド | コンストラクタ | メソッド 検索 機械翻訳について モジュール java.base パッケージ java.lang クラスScopedValue.Carrier java.lang.Object java.lang.ScopedValue.Carrier 含まれているクラス: ScopedValuePREVIEW<T> public static final class ScopedValue.Carrier extends Object Carri...
(Foreign Function & Memory APIとVector API)、Project Loomに関する機能(Virtual Thread、Scoped Value、Structured Concurrency)、パフォーマンスのアップデート(世代別ZGC)、および保守・非推奨機能(32ビット x86ポートの削除を非推奨にする、エージェントの動的ロードが許可されなくなることに対す...
JEP 446: Scoped Values (Preview): Enables the sharing of immutable data within and across threads. This helps increase the ease-of-use, comprehensibility, robustness, and performance of developers’ projects. JEP 453: Structured Concurrency (Preview): Simplifies concurrent programming by introducing an...