enums - OSGi 依赖 hell : ClassNotFoundException: org. eclipse.persistence.internal.jaxb.WrappedValue

Question

我有 Equinox、Jersey 和 MOXy 的工作环境。 Jersey 使用 MOXy 解析 JSON 并绑定(bind)到 bean 对象。将某些 @XmlRootElement 类的一个字段类型更改为枚举后，我得到:

java.lang.NoClassDefFoundError: org/eclipse/persistence/internal/jaxb/WrappedValue
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
at org.eclipse.persistence.internal.jaxb.JaxbClassLoader.generateClass(JaxbClassLoader.java:124)
at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateWrapperClass(MappingsGenerator.java:3232)
...

MOXy 包似乎没问题:

osgi> lb -l
...
50|Active     |    4|initial@reference:file:plugins/org.eclipse.persistence.moxy_2.6.0.v20150309-bf26070.jar
...

jar 里有类

$ jar tf plugins/org.eclipse.persistence.moxy_2.6.0.v20150309-bf26070.jar | grep Wrapped
org/eclipse/persistence/internal/jaxb/WrappedValue.class

然后包被导出

osgi> bundle 50
...
Exported packages
  org.eclipse.persistence.internal.jaxb; version="2.6.0"[exported]
...

那么为什么我得到 ClassNotFoundException？

编辑:德国联邦:

0|Active     |    0|System Bundle
1|Active     |    4|initial@reference:file:plugins/org.mongodb.morphia_0.110.0.jar
2|Active     |    4|initial@reference:file:plugins/javax.validation.api_1.1.0.Final.jar
3|Active     |    4|initial@reference:file:plugins/classmate_1.0.0.jar
4|Active     |    4|initial@reference:file:plugins/org.hibernate.validator_5.1.3.Final.jar
5|Active     |    4|initial@reference:file:plugins/commons-logging_1.1.1.jar
6|Active     |    4|initial@reference:file:plugins/org.eclipse.jetty.server_8.1.16.v20140903.jar
7|Active     |    4|initial@reference:file:plugins/com.thoughtworks.proxytoys_1.0.0.jar
8|Active     |    4|initial@reference:file:plugins/org.eclipse.jetty.http_8.1.16.v20140903.jar
9|Active     |    4|initial@reference:file:plugins/org.eclipse.equinox.http.jetty_3.0.200.v20131021-1843.jar
10|Active     |    4|initial@reference:file:../../../../edu.zut.aci.nsg.restapi/
11|Active     |    4|initial@reference:file:plugins/org.mongodb.morphia.util_0.110.0.jar
12|Active     |    4|initial@reference:file:plugins/org.eclipse.osgi.services_3.4.0.v20140312-2051.jar
13|Active     |    4|initial@reference:file:plugins/org.eclipse.equinox.http.servlet_1.1.500.v20140318-1755.jar
14|Active     |    4|initial@reference:file:plugins/org.glassfish.javax.json_1.0.4.jar
15|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.ext.jersey-bean-validation_2.17.0.jar
16|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.media.jersey-media-jaxb_2.17.0.jar
17|Active     |    4|initial@reference:file:plugins/org.glassfish.hk2.utils_2.4.0.b10.jar
18|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.containers.jersey-container-servlet_2.17.0.jar
19|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.core.jersey-client_2.17.0.jar
20|Active     |    4|initial@reference:file:plugins/org.eclipse.persistence.core_2.6.0.v20150309-bf26070.jar
21|Active     |    4|initial@reference:file:plugins/javassist_3.18.1.GA.jar
22|Active     |    4|initial@reference:file:plugins/org.eclipse.jetty.security_8.1.16.v20140903.jar
23|Active     |    4|initial@reference:file:plugins/org.glassfish.hk2.external.javax.inject_2.4.0.b10.jar
24|Active     |    4|initial@reference:file:plugins/com.eclipsesource.jaxrs.publisher_4.3.0.201503290743.jar
25|Active     |    4|initial@reference:file:plugins/org.mongodb.mongo-java-driver_2.13.0.RELEASE.jar
26|Active     |    4|initial@reference:file:plugins/org.eclipse.persistence.asm_5.0.1.v201405080102.jar
27|Active     |    4|initial@reference:file:plugins/com.google.gson_2.3.1.jar
28|Active     |    4|initial@reference:file:plugins/org.eclipse.jetty.util_8.1.16.v20140903.jar
29|Active     |    4|initial@reference:file:plugins/org.eclipse.jetty.servlet_8.1.16.v20140903.jar
30|Active     |    4|initial@reference:file:plugins/org.eclipse.jetty.io_8.1.16.v20140903.jar
31|Active     |    1|initial@reference:file:plugins/org.eclipse.equinox.ds_1.4.200.v20131126-2331.jar
32|Active     |    4|initial@reference:file:plugins/org.glassfish.hk2.api_2.4.0.b10.jar
33|Active     |    4|initial@reference:file:plugins/org.apache.felix.gogo.runtime_0.10.0.v201209301036.jar
34|Active     |    4|initial@reference:file:plugins/org.eclipse.jetty.continuation_8.1.16.v20140903.jar
35|Active     |    4|initial@reference:file:plugins/org.eclipse.equinox.console_1.1.0.v20140131-1639.jar
36|Active     |    4|initial@reference:file:plugins/com.eclipsesource.jaxrs.provider.security_2.1.0.201503290743.jar
37|Active     |    4|initial@reference:file:plugins/javax.el_2.2.0.v201303151357.jar
38|Active     |    4|initial@reference:file:plugins/javax.ws.rs-api_2.0.1.jar
39|Active     |    4|initial@reference:file:plugins/org.glassfish.hk2.osgi-resource-locator_1.0.1.jar
40|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.bundles.repackaged.jersey-guava_2.17.0.jar
41|Active     |    4|initial@reference:file:plugins/org.jboss.logging.jboss-logging_3.1.3.GA.jar
42|Active     |    4|initial@reference:file:plugins/org.eclipse.equinox.util_1.0.500.v20130404-1337.jar
43|Active     |    4|initial@reference:file:plugins/org.glassfish.hk2.external.aopalliance-repackaged_2.4.0.b10.jar
44|Active     |    4|initial@reference:file:plugins/javax.servlet-api_3.0.1.jar
45|Active     |    4|initial@reference:file:plugins/org.apache.felix.gogo.shell_0.10.0.v201212101605.jar
46|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.core.jersey-common_2.17.0.jar
47|Active     |    4|initial@reference:file:plugins/org.glassfish.hk2.locator_2.4.0.b10.jar
48|Active     |    4|initial@reference:file:plugins/javax.annotation-api_1.2.0.jar
49|Active     |    4|initial@reference:file:plugins/org.apache.commons.configuration_1.10.0.jar
50|Active     |    4|initial@reference:file:plugins/org.eclipse.persistence.moxy_2.6.0.v20150309-bf26070.jar
51|Active     |    4|initial@reference:file:plugins/org.scala-lang.scala-library_2.11.6.v20150224-172222-092690e7bf.jar
52|Active     |    4|initial@reference:file:plugins/org.apache.commons.lang_2.6.0.jar
53|Active     |    4|initial@reference:file:plugins/org.glassfish.web.javax.el_2.2.4.jar
54|Active     |    4|initial@reference:file:plugins/org.slf4j.api_1.7.2.v20121108-1250.jar
55|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.containers.jersey-container-servlet-core_2.17.0.jar
56|Active     |    4|initial@reference:file:plugins/org.apache.felix.gogo.command_0.10.0.v201209301215.jar
57|Active     |    4|initial@reference:file:plugins/org.glassfish.jersey.core.jersey-server_2.17.0.jar

导致问题的数据模型更改:

来自:

@XmlRootElement
public class Role implements Serializable {

    public static final String COMMON = "common";
    public static final String REGISTRANT = "registrant";
    ...

到:

@XmlEnum(String.class)
public enum Role {

    @XmlEnumValue("common") COMMON ("common"),
    @XmlEnumValue("registrant") REGISTRANT ("registrant"),
    @XmlEnumValue("laborant") LABORANT ("laborant"),
    ...

用法如下:

@XmlRootElement
public class User implements Principal, Serializable {
    private static final long serialVersionUID = 1L;
    ...
    private List<Role> roles = new ArrayList<Role>();
    ...

和

@PUT @Path("/{name}")
@Consumes({MediaType.APPLICATION_JSON, MediaType.TEXT_XML})
public Response register(@PathParam("name") String name, @Valid User user) {
    ...

Answer 1

我认为这可能是由于使用 JAXB 的包中的 Import-Package list header 中缺少条目引起的。我有一个类似的堆栈跟踪，当我添加 org.eclipse.persistence.jaxb 时它起作用了。

比照。 Maven Bundle 插件的以下代码段:

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <configuration>
                <instructions>
                    <Import-Package>
                        org.eclipse.persistence.jaxb,
                        *
                    </Import-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>