Karaf - 由于“org.apache.camel.model.cloud”不包含 ObjectFactory.class 或 jaxb.index，渲染 Swagger API 时出错答案

【问题标题】：Karaf - Error rendering Swagger API due "org.apache.camel.model.cloud" doesnt contain ObjectFactory.class or jaxb.indexKaraf - 由于“org.apache.camel.model.cloud”不包含 ObjectFactory.class 或 jaxb.index，渲染 Swagger API 时出错
【发布时间】：2021-03-11 23:21:29
【问题描述】：

我正在尝试使用 KARAF 构建 camel-rest dsl，但这种招摇似乎行不通。

javax.xml.bind.JAXBException: "org.apache.camel.model.cloud" doesnt contain ObjectFactory.class or jaxb.index
    at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:260) ~[jaxb-runtime-2.3.3.jar:2.3.3]
    at com.sun.xml.bind.v2.JAXBContextFactory.createContext(JAXBContextFactory.java:48) ~[jaxb-runtime-2.3.3.jar:2.3.3]
    at javax.xml.bind.ContextFinder.find(ContextFinder.java:302) ~[?:?]
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:478) ~[?:?]
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:435) ~[?:?]
    at org.apache.camel.xml.jaxb.DefaultModelJAXBContextFactory.newJAXBContext(DefaultModelJAXBContextFactory.java:39) ~[?:?]
    at org.apache.camel.xml.jaxb.DefaultModelJAXBContextFactory.newJAXBContext(DefaultModelJAXBContextFactory.java:29) ~[?:?]
    at org.apache.camel.xml.jaxb.JaxbModelToXMLDumper.getJAXBContext(JaxbModelToXMLDumper.java:195) ~[?:?]
    at org.apache.camel.xml.jaxb.JaxbModelToXMLDumper.dumpModelAsXml(JaxbModelToXMLDumper.java:69) ~[?:?]
    at org.apache.camel.swagger.RestSwaggerSupport.getRestDefinitions(RestSwaggerSupport.java:152) ~[!/:3.5.0]
    at org.apache.camel.swagger.RestSwaggerSupport.renderResourceListing(RestSwaggerSupport.java:232) ~[!/:3.5.0]
    at org.apache.camel.swagger.RestSwaggerProcessor.process(RestSwaggerProcessor.java:120) [!/:3.5.0]

只是正常的休息配置

   restConfiguration()
                // Use the 'servlet' component.
                .component("jetty")
                .host("localhost").port(8080)
                // Allow Camel to try to marshal/unmarshal between Java objects and JSON
                .bindingMode(RestBindingMode.auto)
                .dataFormatProperty("prettyPrint", "true")
                .dataFormatProperty("mustBeJAXBElement", "false")
                .apiContextPath("api-doc")
                .apiProperty("api.title", "User API")
                .apiProperty("api.version", "1.0.0")
                .enableCORS(true);

   rest().path("/api")
                .consumes("application/json")
                .produces("application/json")
                .get()
                .outType(ResponseType.class)
                       .description("Get Response").type(ResponseType.class)
                       .param().name("ab").type(RestParamType.path).description("blah").endParam() 
   ...

pom.xml

 <dependencies>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>osgi.core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>osgi.cmpn</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.camel.karaf</groupId>
            <artifactId>camel-core-osgi</artifactId>
            <version>${camel.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-swagger-java</artifactId>
            <version>${camel.version}</version>
        </dependency>
        <!-- JSON support -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-jackson</artifactId>
            <version>${camel.version}</version>
        </dependency>

    </dependencies>

作为 rest dsl 服务调用工作正常，但招摇 API 不工作，camel-core-engine 确实有 jaxb.index 文件。我找不到 felix 找不到它的任何原因，或者 felix 没有包含此文件？

【问题讨论】：

如何在 OSGi/Karaf 中运行它？好像您自己使用 camel-core-osgi 并以某种方式自己创建骆驼上下文，那么 OSGi 类加载和诸如此类的问题是一个问题，您需要正确/小心如何设置它。否则你会得到 osgi 类加载 hell 就像你在这里一样。

标签： jaxb apache-camel osgi apache-karaf apache-felix

【解决方案1】：

看起来这将在 https://issues.apache.org/jira/browse/CAMEL-16040 中修复。我认为这不会影响蓝图用户，但正如克劳斯在评论中提到的那样，如果您创建自己的骆驼上下文，您将需要包含此修复的骆驼版本。

【讨论】：