Contexts and Dependency Injection的参考实现由哪些

Contexts and Dependency Injection (CDI) 规范的参考实现由以下组件组成：

1. Weld：Weld 是 Java 应用程序的 CDI 实现之一，它是 CDI 规范的参考实现之一，也是一个开源项目。

2. OpenWebBeans：OpenWebBeans 是另一个 Java 应用程序的 CDI 实现，它是 Apache 软件基金会的一个开源项目。

3. CanDI：CanDI 是另一个 Java 应用程序的 CDI 实现，它是由 Caucho Technology 开发的一个开源项目。

除此之外，还有其他 CDI 实现，如 Apache DeltaSpike 等，它们提供了额外的功能和扩展来增强 CDI 的能力。

相关问题

UnsatisfiedDependencyException

UnsatisfiedDependencyException is a type of exception that occurs in software development when a dependency required by a component or module cannot be satisfied. This can happen when a required class, interface, or resource is missing, or when a dependency has not been properly configured or initialized.

In practice, UnsatisfiedDependencyException can occur in a variety of contexts, such as when using dependency injection frameworks like Spring, or when working with modular application architectures. When this exception is thrown, it usually indicates that there is a problem with the application's configuration or setup, and that further investigation is needed to identify and resolve the underlying issue.

To resolve UnsatisfiedDependencyException, developers may need to review their application's dependencies and check that all required components are present and properly configured. They may also need to review their code and check for any errors or inconsistencies that could be causing the exception to be thrown. Finally, developers may need to consult documentation or seek help from other developers to identify and resolve the issue.