GlassFish HK2

HK2 (Hundred-Kilobyte Kernel) is a light-weight and dynamic dependency injection framework and is a part of the GlassFish Application Server.

HK2
Developer(s)Oracle Corporation
Stable release
2.4.0
Repository
Operating systemCross-platform
Available inJava 6 or Higher
TypeDependency Injection Kernel
LicenseCDDL version 1.0 and GPL v2 license
Websitehttps://javaee.github.io/hk2/

HK2 complies with JSR 330 (Dependency Injection for Java). It has useful utilities for marking classes as services and interfaces as contracts.

Some of the features of HK2 DI Kernel are

  • Custom scopes
  • use of proxies
  • Custom injection resolution
  • Assisted injection
  • J-I-T injection resolution
  • Custom validation and security
  • Run Level Services
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