Jersey Guice管理的泽西岛和资源

我正在开发一个在OSGI环境中动态加载JAX资源的应用程序。 这些资源由Guice在每个Bundle中管理，并加载到在核心Bundle上运行的JAX应用程序中

ResourceConfig cfg = new ResourceConfig(context.getConfiguration());
for (Provider<?> r : kb.getResources()) {
  if (!cfg.isRegistered(r.get())) {
    cfg.registerInstances(r.get());
  }
}

context.reload(cfg);

。。。。 ....

我认为错误在于新实例（资源r1）由H2K而不是Guice处理，不能满足您的依赖性

我们试图在OSGI环境中使用guice桥工件，但这会产生一个错误：找不到ServiceLocator的实现

但所有依赖项都在类路径中：

karaf@root> la | grep HK2
[ 260] [Active     ] [            ] [   30] HK2 API module (2.2.0.b21)
[ 262] [Active     ] [            ] [   30] HK2 Implementation Utilities (2.2.0.b21)
[ 283] [Active     ] [            ] [   30] HK2 Guice Bridge (2.1.96)
karaf@root> la | grep ServiceLo
[ 261] [Active     ] [            ] [   30] ServiceLocator Default Implementation (2.2.0.b21)
karaf@root> 

那么，如果解决方案是使用guice桥，那么您知道如何更改guice管理的资源路径吗？配置它的最佳方式是什么

我用的是泽西2.4

谢谢

我找到的解决方案（如果不是最好的话）是定义CustomServletContext并使用guice bridge工件，遵循jersey issue tracker中的引用问题。 解决方案：

 public class KratosServletContainer extends ServletContainer {

     private Injector injector;

     @Inject
    KratosServletContainer(Injector injector, ResourceConfig configuration) {
         super(configuration);
         this.injector = injector;
     }

     @Override
     protected void init(WebConfig webConfig) throws ServletException {
         super.init(webConfig);

         ServiceLocator locator;
         try {
             Field webComponentField = getClass().getSuperclass()
                     .getDeclaredField("webComponent");

             webComponentField.setAccessible(true);
             WebComponent webComponent = (WebComponent) webComponentField.get(this);

             Field appHandlerField = webComponent.getClass().getDeclaredField("appHandler");
             appHandlerField.setAccessible(true);
             ApplicationHandler appHandler = (ApplicationHandler) appHandlerField.get(webComponent);
             locator = appHandler.getServiceLocator();

         } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | llegalAccessException e) {
             throw new RuntimeException(e);
         }

         GuiceBridge.getGuiceBridge().initializeGuiceBridge(
                 locator);

         GuiceIntoHK2Bridge guiceBridge = locator
                 .getService(GuiceIntoHK2Bridge.class);
         guiceBridge.bridgeGuiceInjector(injector);
     } 
}

举例来说： 我的资源如下所示：

@Path("resource") 
public class ResourceFinder {

     private static final Logger logger = Logger.getLogger(ResourceFinder.class.getName());

     private Date date;

     private final PersistenceManagerService pm;

     @Inject
     public ResourceFinder(Date date, PersistenceManagerService pm) {
         this.date = date;
         this.pm = pm;   
     }

     @GET
     @Produces(MediaType.APPLICATION_JSON)
     @Path("/suma/{value1}/{value2}")
     @PermitAll
     public String getSuma(@PathParam("value1") int value1,
             @PathParam("value2") int value2) {

         User user = new User();

         user.setName("cacho" + value1);



         pm.get().makePersistent(user);

         pm.get().flush();

         //date was injected by guice
         //pm was injected by guice

         return String.valueOf(value1 + value2 + "   "+pm.get()+" "+date);
     } 
}

方法：

     @Override
     public ResourceModel processResourceModel(ResourceModel resourceModel, Configuration configuration) {
         logger.info(actualKrundle.getName());
         ResourceModel.Builder newResourceModelBuilder = new ResourceModel.Builder(false);

         for (final Provider<?> r : actualKrundle.getResources()) {
             String name = r.get().getClass().getCanonicalName();
             List<Resource> resources = resourceModel.getResources();
             for (final Resource resource : resources) {
                 if (resource.getName().endsWith(name)){
                    final Resource.Builder resourceBuilder = Resource.builder(resource);
                    resourceBuilder.path(actualKrundle.getName()+"/"+resource.getPath());
                    Resource r1 = resourceBuilder.build();
                    newResourceModelBuilder.addResource(r1);
                    break;
                 }
             }
         }
         return newResourceModelBuilder.build();
     }

@覆盖
公共资源模型processResourceModel（资源模型ResourceModel，配置）{
logger.info（actualKrundle.getName（））；
ResourceModel.Builder newResourceModelBuilder=newresourcemodel.Builder（false）；
for（最终提供程序r:actualKrundle.getResources（））{
字符串名称=r.get（）.getClass（）.getCanonicalName（）；
List resources=resourceModel.getResources（）；
for（最终资源：资源）{
if（resource.getName（）.endsWith（name））{
final Resource.Builder resourceBuilder=Resource.Builder（资源）；
resourceBuilder.path（actualKrundle.getName（）+“/”+resource.getPath（））；
ResourceR1=resourceBuilder.build（）；
newResourceModelBuilder.addResource（r1）；
打破
}
}
}
返回newResourceModelBuilder.build（）；
}

在资源路径中进行更改，重新创建实例，所有内容都保持注入状态

@Path("resource") 
public class ResourceFinder {

     private static final Logger logger = Logger.getLogger(ResourceFinder.class.getName());

     private Date date;

     private final PersistenceManagerService pm;

     @Inject
     public ResourceFinder(Date date, PersistenceManagerService pm) {
         this.date = date;
         this.pm = pm;   
     }

     @GET
     @Produces(MediaType.APPLICATION_JSON)
     @Path("/suma/{value1}/{value2}")
     @PermitAll
     public String getSuma(@PathParam("value1") int value1,
             @PathParam("value2") int value2) {

         User user = new User();

         user.setName("cacho" + value1);



         pm.get().makePersistent(user);

         pm.get().flush();

         //date was injected by guice
         //pm was injected by guice

         return String.valueOf(value1 + value2 + "   "+pm.get()+" "+date);
     } 
}

     @Override
     public ResourceModel processResourceModel(ResourceModel resourceModel, Configuration configuration) {
         logger.info(actualKrundle.getName());
         ResourceModel.Builder newResourceModelBuilder = new ResourceModel.Builder(false);

         for (final Provider<?> r : actualKrundle.getResources()) {
             String name = r.get().getClass().getCanonicalName();
             List<Resource> resources = resourceModel.getResources();
             for (final Resource resource : resources) {
                 if (resource.getName().endsWith(name)){
                    final Resource.Builder resourceBuilder = Resource.builder(resource);
                    resourceBuilder.path(actualKrundle.getName()+"/"+resource.getPath());
                    Resource r1 = resourceBuilder.build();
                    newResourceModelBuilder.addResource(r1);
                    break;
                 }
             }
         }
         return newResourceModelBuilder.build();
     }