HK2依赖注入在多个servlet中

Question

We have a REST API server based on Jetty 9.3 and Jersey 2.7

Dependency injection works fine with HK2 that comes bundled with the libs. We register the needed services to the application Handler via a ResourceConfig and have something like:

handler.addServlet(new ServletHolder("main-api", new ServletContainer(resourceConfig)), MAIN_SERVLET_PATH + "/*");

We then wanted to move some of the HTTP end-points to a separate "admin" port. So we created two separate ServerConnector s, one for each port, and two separate Handler s wrapping separate ServletHolder s that are mapped to the relevant pathSpecs, for each relevant path ("/admin" and "/api").

The problem is that each of the Handlers now creates a separate ServiceLocator with its own set of managed services. We thereby cannot share services between admin and api end-points - Singleton objects defined in both handlers are created twice.

Tried creating a "bridge" between the two ServiceLocators - but that causes issues with scoped resources. Tried creating a third ServiceLocator and bridging it to the two other locators - not good either.

Any ideas how one can share DI objects between separate handlers in Jetty? Or have an alternative idea of how the above can be achieved?

Answer 1

thanks peeskillet , your suggestion indeed solved the issue

ContextHandler defaultContext;
ContextHandler adminContext;
AbstractBinder sharedSingeltons;

ServiceLocator sharedServiceLocator = ServiceLocatorUtilities.bind("shared-locator", sharedSingeltons); 
defaultContext.setAttribute(ServletProperties.SERVICE_LOCATOR, sharedServiceLocator);
adminContext.setAttribute(ServletProperties.SERVICE_LOCATOR, sharedServiceLocator);