HK2注入問題

Question

我目前在一個網絡項目中使用Jersey，Grizzly和Gradle，並且嘗試與HK2進行依賴注入。 我已按照文檔（ https://hk2.java.net/2.5.0-b04/inhabitant-generator.html ）中的說明進行操作，以使HK2元數據生成器與Gradle一起使用。 但是，當我運行應用程序時，出現以下異常：

org.glassfish.hk2.api.UnsatisfiedDependencyException: There was no object available for injection at SystemInjecteeImpl(requiredType=IApiKeyRepository,parent=AuthService,qualifiers={},position=-1,optional=false,self=false,unqualified=null,293474277)
at org.jvnet.hk2.internal.ThreeThirtyResolver.resolve(ThreeThirtyResolver.java:75)
at org.jvnet.hk2.internal.ClazzCreator.resolve(ClazzCreator.java:211)
at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:234)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:357)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:471)
at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:83)
at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:71)
at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture$1.call(Cache.java:97)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture.run(Cache.java:154)
at org.glassfish.hk2.utilities.cache.Cache.compute(Cache.java:199)
at org.jvnet.hk2.internal.SingletonContext.findOrCreate(SingletonContext.java:122)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2020)
at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:114)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:693)
at org.jvnet.hk2.internal.ThreeThirtyResolver.resolve(ThreeThirtyResolver.java:78)
at org.jvnet.hk2.internal.ClazzCreator.resolve(ClazzCreator.java:211)
at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:234)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:357)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:471)
at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:83)
at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:71)
at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture$1.call(Cache.java:97)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture.run(Cache.java:154)
at org.glassfish.hk2.utilities.cache.Cache.compute(Cache.java:199)
at org.jvnet.hk2.internal.SingletonContext.findOrCreate(SingletonContext.java:122)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2020)
at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:114)
at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:88)
at org.glassfish.jersey.internal.inject.Providers.getAllRankedProviders(Providers.java:247)
at org.glassfish.jersey.server.ApplicationHandler.getProcessingProviders(ApplicationHandler.java:772)
at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:537)
at org.glassfish.jersey.server.ApplicationHandler.access$500(ApplicationHandler.java:184)
at org.glassfish.jersey.server.ApplicationHandler$3.call(ApplicationHandler.java:350)
at org.glassfish.jersey.server.ApplicationHandler$3.call(ApplicationHandler.java:347)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.processWithException(Errors.java:255)
at org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:347)
at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.<init>(GrizzlyHttpContainer.java:349)
at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpServerFactory.createHttpServer(GrizzlyHttpServerFactory.java:238)
at com.neuro.track.web.api.ApplicationConfig.main(ApplicationConfig.java:51)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

如您所見，DI無法正常工作。 我的應用程序的main方法如下所示：

public static void main(String[] args) throws Exception {
    final ServiceLocator locator = ServiceLocatorUtilities.createAndPopulateServiceLocator();
    final ResourceConfig resourceConfig = new ApplicationConfig();
    resourceConfig.packages("com.package")
    final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(BASE_URI, resourceConfig, locator);

    Runtime.getRuntime().addShutdownHook(new Thread(server::shutdownNow));

    server.start();
}

我的假設是HK2元數據生成器程序包將掃描我的項目並自動注冊所有帶有@Service類注釋的類，而無需我明確注冊這些類。 但是，我所做的任何事情都不會導致這些服務注冊。 我真的想避免必須自己手動添加服務類，因為該項目將變得越來越大。 另外，我試圖避免使用HK2居民生成器庫的額外構建步驟。 為了使HK2元數據生成器程序包在運行應用程序時自動注冊我的服務，我缺少什么嗎？

Answer 1

原來，我在接口上使用了錯誤的@Contract裝飾器。 我使用的是org.glassfish.jersey.spi.Contract而不是org.jvnet.hk2.annotations.Contract 。