从 Felix SCR 迁移到 OSGI 声明性服务时,服务未在 Karaf 中列出

问题描述

我正在从 Felix SCR 注释迁移到 R6 Osgi 声明性服务,但该服务未在 karaf 中列出。根据下面的代码 SampleServiceImpl 应该列出的是 karaf 。但它没有列出。 在 pom.xml 中还有其他配置吗?

package com.sample.test;


import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferencePolicy;
import org.osgi.service.component.annotations.ConfigurationPolicy;
import org.osgi.service.component.annotations.Deactivate;

    @Component (configurationPolicy = ConfigurationPolicy.OPTIONAL,immediate = true,service = SampleService.class)
    public class SampleServiceImpl implements SampleService
    {
    
     @Reference (policy = ReferencePolicy.DYNAMIC,service = AgentService.class,bind = "bindAgentService",unbind ="unbindAgentService")
    private AgentService agentService;
    
     
     @Activate
        protected void activate() {
            System.out.println("activate ");
        }
    
        @Deactivate
        protected void deactivate() {
            System.out.println("de-activate ");
        }
    }

这是我正在使用的 pom.xml。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <groupId>com.test.sample</groupId>
  <artifactId>compile</artifactId>
  <version>1.0.0</version>

  
  <dependencies>      
     <dependency>
       <groupId>org.osgi</groupId>
       <artifactId>osgi.cmpn</artifactId>
       <version>6.0.0</version>
       <scope>provided</scope>
    </dependency>
  </dependencies>

<build>
    <plugins>
      <plugin>
        <groupId>org.apache.Felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>
      </plugin>
    </plugins>   
  </build>
</project>

解决方法

@Reference (policy = ReferencePolicy.DYNAMIC,service = AgentService.class,bind = "bindAgentService",unbind ="unbindAgentService")

您列出了 2 个方法,bindAgentServiceunbindAgentService,它们没有出现在您的类中。您还将 @Reference 注释应用于字段。你想要什么?现场注入?方法注入?两个都?如果您只需要字段注入,请删除注释中的 bindunbind 元素。