Jersey Hk2注入@Service注释类

Question

对于我的生活,我无法通过hk2获得Jersey来自动发现@Service注释类并注入它们.我试图遵循堆栈溢出,泽西和hk2文档的每一个建议,仍然没有运气.我试图将一个简单的echo服务注入Jersey资源.骨架是从Jersey的简单webapp maven原型生成的,我试图扩展它.这是我到目前为止:

的pom.xml

<build>
  <finalName>sandbox</finalName>
  <plugins>
    <plugin>
      <groupId>org.glassfish.hk2</groupId>
      <artifactId>hk2-inhabitant-generator</artifactId>
      <version>2.3.0</version>
      <executions>
        <execution>
          <configuration>
            <verbose>true</verbose>
          </configuration>
          <goals>
            <goal>generate-inhabitants</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>
...
<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>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
  </dependency>
  <dependency>
    <groupId>org.glassfish.hk2</groupId>
    <artifactId>hk2</artifactId>
    <version>2.3.0</version>
  </dependency>
</dependencies>

web.xml中

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>my.package.jerseytest</param-value>
    </init-param>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>my.package.jerseytest.application.Application</param-value>
    </init-param>    

    <load-on-startup>1</load-on-startup>
</servlet>

my.package.jerseytest.application.Application

public class Application extends ResourceConfig {
    public Application() {
        ServiceLocator locator = ServiceLocatorUtilities.createAndPopulateServiceLocator();
    }
}

my.package.jerseytest.service.EchoService

@Service
public class EchoService {
    public String generateResponse(String echo) {
        return echo;
    }
}

my.package.jerseytest.resource.MyResource

@Path("myresource")
public class MyResource {

    @Inject
    EchoService echoService;

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String getIt() {
        return echoService.generateResponse("Got it!");
    }
}

我已经检查过,抑制剂生成器确实运行并产生了它的输出,但是当运行Tomcat服务器时http://localhost:8080/sandbox/webapi/myresource我得到了

SEVERE: Servlet.service() for servlet [Jersey Web Application] in context with path [/sandbox] threw exception [A MultiException has 3 exceptions.  They are:
1. org.glassfish.hk2.api.UnsatisfiedDependencyException: There was no object available for injection at SystemInjecteeImpl(requiredType=EchoService,parent=MyResource,qualifiers={},position=-1,optional=false,self=false,unqualified=null,932014249)
2. java.lang.IllegalArgumentException: While attempting to resolve the dependencies of my.package.jerseytest.resource.MyResource errors were found
3. java.lang.IllegalStateException: Unable to perform operation: resolve on my.package.jerseytest.resource.MyResource
] with root cause
org.glassfish.hk2.api.UnsatisfiedDependencyException: There was no object available for injection at SystemInjecteeImpl(requiredType=EchoService,parent=MyResource,qualifiers={},position=-1,optional=false,self=false,unqualified=null,932014249)

我缺少什么想法？我将不胜感激任何帮助 :(

NB!我知道

• ServiceLocator如何在HK2中自动找到@Service和@Contact？
• HK2注释未被处理
• https://hk2.java.net/inhabitant-generator.html
• https://hk2.java.net/2.2.0-b25/getting-started.html
• https://java.net/jira/browse/HK2-165

但他们没帮我...

Answer 1

尝试在应用程序构造函数中添加需要扫描的包。包上的“true”参数意味着递归地扫描包：

public class Application extends ResourceConfig {
    public Application() {
        packages(true, "my.package.jerseytest");
        ServiceLocator locator = ServiceLocatorUtilities.createAndPopulateServiceLocator();
    }
}