Java Apache Felix OSGi错误：缺少要求OSGi.extender

尝试启动捆绑包时出现以下错误：

org.osgi.framework.BundleException:
  Unable to resolve com.example.test [7](R 7.0):
    missing requirement [com.example.test [7](R 7.0)] osgi.extender; (&(osgi.extender=osgi.component)(version>=1.3.0)(!(version>=2.0.0)))
  Unresolved requirements:
    [[com.example.test [7](R 7.0)] osgi.extender; (&(osgi.extender=osgi.component)(version>=1.3.0)(!(version>=2.0.0)))]

My pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>bundle</packaging>

    <dependencies>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.core</artifactId>
            <version>6.0.0</version>
        </dependency>

        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.service.component.annotations</artifactId>
            <version>1.4.0</version>
        </dependency>
    </dependencies>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.felix</groupId>
                    <artifactId>maven-bundle-plugin</artifactId>
                    <version>4.0.0</version>
                    <extensions>true</extensions>
                </plugin>
            </plugins>
        </pluginManagement>

        <plugins>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <configuration>
                    <instructions>
                        <Export-Package>com.example</Export-Package>
                    </instructions>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

FacadeLocator.java：

package com.example;

import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

@Component
public class FacadeLocator {
    public static Facade facade;

    @Reference
    public void setFacade(Facade facade) {
        FacadeLocator.facade = facade;
    }
}

我做错了什么

---

谢谢

您的捆绑包包含一个声明性服务组件--

FacadeLocator

。这意味着您依赖于实现声明性服务的“扩展程序”捆绑包。您需要将该捆绑包与您自己的捆绑包一起部署，以使其正常工作

ApacheFelix的DS实现包的名称为

org.Apache.Felix.scr

，可以下载

---

您看到的错误消息可以按如下方式解码。

osgi.extender

名称空间中缺少一个需求（扩展程序的名称空间类似于DS）。您需要的特定扩展器是

osgi.component

，版本1.3或更高版本。maven bundle插件在bundle的META-INF/MANIFEST.MF中生成了这个需求，因为它看到bundle中有一个组件。每当一个bundle有需求时，就必须有另一个bundle提供匹配的功能。在本例中，该捆绑包是

org.apache.felix.scr

非常感谢@Martineralecký顺便说一句，将服务引用保存到静态字段是一个非常糟糕的主意！

package com.example;

import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

@Component
public class FacadeLocator {
    public static Facade facade;

    @Reference
    public void setFacade(Facade facade) {
        FacadeLocator.facade = facade;
    }
}