无法在我的资源中注入 @Service 和 @Contract 依赖项 class

Question

基于此博客的指南，Roll your own Auto Discovery with Jersey and HK2，我有以下 资源 POJO：

@Path("Test")
public class TestResource {
    @Inject
    private TestService service;
    @GET
    @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
    public Set<Test> getTests() {
        return service.getAllTests();
    }
}

TestService:

@Contract
public interface TestService {
    public Set<Test> getAllTests();
}

TestServiceImpl

@Service
public class TestServiceImpl implements TestService {

    @Override
    public Set<Test> getAllTests() {
        Set<Test> tests = new HashSet<>();
        Test c = new Test();
        c.setName("test");
        tests.add(c);
        return tests;
    }
}

pom.xml 中的 Jersey 依赖项是版本 2.25.1

   <dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey</groupId>
            <artifactId>jersey-bom</artifactId>
            <version>${jersey.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0</version>
</dependency>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet-core</artifactId>
        <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
        <!-- artifactId>jersey-container-servlet</artifactId -->
    </dependency>
     <dependency>
        <groupId>org.glassfish.jersey.bundles</groupId>
        <artifactId>jaxrs-ri</artifactId>
        </dependency>
     <dependency>
         <groupId>org.glassfish.jersey.media</groupId>
         <artifactId>jersey-media-json-jackson</artifactId>
     </dependency>
     <dependency>
         <groupId>org.glassfish.hk2</groupId>
         <artifactId>hk2</artifactId>
         <version>2.5.0-b36</version>
     </dependency>

为了让 Jersey 扫描 @Service 和 @Contract classes 自动，我使用了 2.5.0 版本的 inhabitant-generator 插件- b36:

<plugin>
  <groupId>org.glassfish.hk2</groupId>
  <artifactId>hk2-inhabitant-generator</artifactId>
  <version>2.5.0-b36</version>
  <executions>
    <execution>
      <goals>
        <goal>generate-inhabitants</goal>
      </goals>
    </execution>
  </executions>
</plugin>

有对应的Feature实现：

public class AutoServiceDiscovery implements Feature {

@Override
public boolean configure(FeatureContext context) {
    ServiceLocator locator = ServiceLocatorProvider.getServiceLocator(context);
    DynamicConfigurationService dcs = locator.getService(DynamicConfigurationService.class);
    Populator populator = dcs.getPopulator();
    try {
        populator.populate(new ClasspathDescriptorFileFinder(this.getClass().getClassLoader()),
                new DuplicatePostProcessor());
    } catch (IOException | MultiException ex) {
        Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, null, ex);
    }
    return true;
}

}

而且确实是通过我ResourceConfigclass注册的:

@ApplicationPath("/*")
public class ApplicationConfig extends ResourceConfig {
    public ApplicationConfig() {
        packages("resources");
        register(new AutoServiceDiscovery());
}

} 但是，我向 /test 发送请求，得到以下错误：

MultiException has 3 exceptions.  They are:
1. org.glassfish.hk2.api.UnsatisfiedDependencyException: There was no object available for 
injection at SystemInjecteeImpl(requiredType=TestService,parent=TestResource,qualifiers=
{},position=-1,optional=false,self=false,unqualified=null,1947073589)
2. java.lang.IllegalArgumentException: While attempting to resolve the dependencies of 
rx.practice.ee.jaxrs.resources.TestResource errors were found
3. java.lang.IllegalStateException: Unable to perform operation: resolve on 
rx.practice.ee.jaxrs.resources.TestResource

org.jvnet.hk2.internal.Collector.throwIfErrors(Collector.java:89)
org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:250)
org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:358)
org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:487)
org.glassfish.jersey.process.internal.RequestScope.findOrCreate(RequestScope.java:162)
...

问题：谁知道@Serviceclass为什么不能注入？我正在使用 Tomcat 服务器

Answer 1

经过几天研究 inhabitat-generator 的源代码后，我发现在 Web 应用程序包的情况下，war， locator 文件未在 META-INF/hk2-locator 中生成，如 HK2 Inhabitant Generator office site in case of using jar as deployment package. The source code of AbstractInhabitantsGeneratorMojo.java told that in case of war, locator files are generated in hk2-locator, and this is not mentioned in the HK2 Inhabitant Generator office site.

中所示

但是，在 bootstrap class、AutoServiceDiscovery 中构造不带目录名参数的 ClasspathDescriptorFileFinder 时，它仅与 jar 兼容，因为部署包，这意味着它只在 META-INF/hk2-locator.

中查找文件

所以更好的解决方案是不使用 inhabitant-generator 插件，而是使用 metadata-generator 依赖项，它是编译时的 annotation processor 并且，它已证明 开箱即用。

如果有人坚持使用这个插件，he/she 可以创建 his/her 自己的 ClasspathDescriptorFileFinder 以便能够找到 locator来自 hk2-locator

的文件

最后但同样重要的是，我还尝试使用 inhabitants-generator 插件的选项在 hk2-locator 中生成 locator 文件，但这似乎是几乎不可能

无法在我的资源中注入 @Service 和 @Contract 依赖项 class

Not able to inject @Service and @Contract dependency in my resource class

jersey

tomcat8

java-ee-7

hk2