Scoped Values 与虚拟线程无缝集成,适合高并发场景。 无副作用: 由于Scoped Values 是不可变的,它们不会引入传统线程局部变量可能带来的副作用。 Scoped Values 的优势 更安全的数据共享: 与ThreadLocal不同,Scoped Values 的值在作用域结束后自动失效,避免了内存泄漏的风险。 简化并发编
Note that scoped values work differently thanThreadLocalvariables, and they are not similar constructs.A scoped value is essentially a method parameter that we do not need to declare, and Java automatically binds it to all method calls in the thread.We can directly access it in its bounded con...
JEP 446: Scoped Values (Preview)Scoped Values在JDK20的JEP 429: Scoped Values (Incubator)作为Incubator此次在JDK21作为preview版本ScopedValue是一种类似ThreadLocal的线程内/父子线程传递变量的更优方案。ThreadLocal提供了一种无需在方法参数上传递通用变量的方法,InheritableThreadLocal使得子线程可以拷贝继承父线程的...
ScopedValue.runWhere(NAME, "duke2", () -> doSomething()); then code in doSomething (or any method that it calls) invoking NAME.get() will read the value "duke1" or "duke2", depending on which thread is executing. Scoped values as capabilities ...
Scoped Values 功能简化了线程间数据共享,使开发人员可以更轻松地在线程之间共享不可变数据。 官网介绍地址:inside.java/2023/09/19/ Project Amber JEP 430: String Templates (Preview):字符串模板 JEP 440: Record Patterns:JEP 441: Pattern Matching for switch:交换机的模式匹配 JEP 443: Unnamed Patterns and...
作用域值(处于预览阶段) 作用域值(Scoped values)是指允许在线程内和线程间共享不可变数据。作用域值允许在大型程序的组件之间安全地共享数据,而无需使用方法参数。这一提议在 JDK 20 中得到了验证。该计划的目标包括易用性、可理解性、健壮性和性能。
5.作用域(Scoped Values and References)(可能处于预览阶段):这种新特性允许创建具有限定作用域的值...
JEP 444:Virtual Threads —通过向 Java 平台引入轻量级虚拟线程,显著减少编写、维护和观察高吞吐量并发应用的工作量。虚拟线程让开发人员可以轻松使用现有的 JDK 工具和技术,对并发应用进行故障排除、调试、分析以及扩展,进而加快应用开发速度。 JEP 446:Scoped Values(预览版)—支持用户在线程内和跨线程共享不可变数据...
Scoped values.The ThreadLocal API is used to store thread-specific information, usually in static final fields, which can then be queried from anywhere those variables are visible. That’s useful, for example, when a container, such as a web server, needs to make information accessible to oth...
(String Templates、Record Patterns、Pattern Matching for Switch、Unnamed Patterns and Variables 以及 Unnamed Classes and Instance Main Methods);Project Panama (Foreign Function & Memory API 和 Vector API) 的增強功能;與 Project Loom 相關的功能 (Virtual Threads、Scoped Values 和 Structured Concurrency);...