3

TL;DR 出于某种原因，我无法在使用 CXF 的 Java 优先 Web 服务中解组一个相当简单的对象。

我有一个 Java-First CXF Web 服务，其 API 类似于：

@WebMethod
public SearchResponse search(@WebParam(name = "searchRequest") SearchRequest searchRequest);

响应（不会解组的类）大致是：

public class SearchResponse {

    private List<SearchResult> results;
    public List<SearchResult> getResults() {
        return results;
    }
    public void setResults(List<SearchResult> results) {
        this.results = results;
    }
}

SearchResult 是一个非常简单的两个属性类：

public class SearchResult {
    private long id;
    private String name;

    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

我可以通过 Soap-UI 调用此服务，它运行良好。但是，当我使用 jaxws 客户端调用时，出现错误：

javax.xml.ws.soap.SOAPFaultException: Unmarshalling Error: null 
    at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:143)
    at $Proxy67.search(Unknown Source)
    at com.blah.MyTest.curseYouSearch(MyTest.java:76)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)
    at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)
    at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
    at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
    at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
    at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.UnsupportedOperationException
    at java.util.AbstractList.add(AbstractList.java:131)
    at java.util.AbstractList.add(AbstractList.java:91)
    at com.sun.xml.internal.bind.v2.runtime.reflect.Lister$CollectionLister.addToPack(Lister.java:290)
    at com.sun.xml.internal.bind.v2.runtime.reflect.Lister$CollectionLister.addToPack(Lister.java:254)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.Scope.add(Scope.java:106)
    at com.sun.xml.internal.bind.v2.runtime.property.ArrayERProperty$ReceiverImpl.receive(ArrayERProperty.java:195)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.endElement(UnmarshallingContext.java:524)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleEndElement(StAXStreamConnector.java:206)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:170)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:351)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:330)
    at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:610)
    at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:530)
    at org.apache.cxf.jaxb.io.DataReaderImpl.read(DataReaderImpl.java:114)
    at org.apache.cxf.interceptor.DocLiteralInInterceptor.handleMessage(DocLiteralInInterceptor.java:99)
    at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
    at org.apache.cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:658)
    at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:2139)
    at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponse(HTTPConduit.java:2022)
    at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1947)
    at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:66)
    at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:632)
    at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62)
    at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
    at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:472)
    at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:302)
    at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:254)
    at org.apache.cxf.frontend.ClientProxy.invokeSync(ClientProxy.java:73)
    at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:123)
    ... 24 more

我可以在 AbstractList.add 上设置一个断点，并根据生成的堆栈，似乎解组正在尝试添加到空列表中，这当然是不可变的：

Thread [main] (Suspended (breakpoint at line 131 in AbstractList))  
    Collections$EmptyList(AbstractList<E>).add(int, E) line: 131    
    Collections$EmptyList(AbstractList<E>).add(E) line: 91  
    Lister$CollectionLister<BeanT,T>.addToPack(T, Object) line: 290 
    Lister$CollectionLister<BeanT,T>.addToPack(Object, Object) line: 254    
    Scope<BeanT,PropT,ItemT,PackT>.add(Accessor<BeanT,PropT>, Lister<BeanT,PropT,ItemT,PackT>, ItemT) line: 106 
    ArrayERProperty$ReceiverImpl.receive(UnmarshallingContext$State, Object) line: 195  
    UnmarshallingContext.endElement(TagName) line: 524  
    StAXStreamConnector.handleEndElement() line: 206    
    StAXStreamConnector.bridge() line: 170  
    UnmarshallerImpl.unmarshal0(XMLStreamReader, JaxBeanInfo) line: 351 
    UnmarshallerImpl.unmarshal(XMLStreamReader, Class<T>) line: 330 
    JAXBEncoderDecoder.unmarshall(Unmarshaller, Object, QName, Class<?>, boolean) line: 610 
    JAXBEncoderDecoder.unmarshall(Unmarshaller, Object, MessagePartInfo, boolean) line: 530 
    DataReaderImpl<T>.read(MessagePartInfo, T) line: 114    
    DocLiteralInInterceptor.handleMessage(Message) line: 99 
    PhaseInterceptorChain.doIntercept(Message) line: 236    
    ClientImpl.onMessage(Message) line: 658 
    HTTPConduit$WrappedOutputStream.handleResponseInternal() line: 2139 
    HTTPConduit$WrappedOutputStream.handleResponse() line: 2022 
    HTTPConduit$WrappedOutputStream.close() line: 1947  
    HTTPConduit(AbstractConduit).close(Message) line: 66    
    HTTPConduit.close(Message) line: 632    
    MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(Message) line: 62 
    PhaseInterceptorChain.doIntercept(Message) line: 236    
    ClientImpl.invoke(BindingOperationInfo, Object[], Map<String,Object>, Exchange) line: 472   
    ClientImpl.invoke(BindingOperationInfo, Object[], Exchange) line: 302   
    ClientImpl.invoke(BindingOperationInfo, Object...) line: 254    
    JaxWsClientProxy(ClientProxy).invokeSync(Method, BindingOperationInfo, Object[]) line: 73   
    JaxWsClientProxy.invoke(Object, Method, Object[]) line: 123 
    ...endless stack lines omitted...

我的客户端在 Spring 中设置为 jaxws:client:

<jaxws:client id="searchServiceClient"
    serviceClass="qualified.class.of.Service"
    address="${url.searchService}">
</jaxws:client>

我们有许多其他 Web 服务以非常相似的方式返回 List 并且工作正常；我有点不知所措，这与这个有什么区别。

该系统使用 Java 6、CXF 2.2.3。

任何建议都将受到欢迎。

4

1 回答 1

3

我想我遇到了同样的问题并且至少在我的情况下有一个解决方案，它可能对你有帮助。

这里的用例与您的用例略有不同，因为我从平面应用程序中读取 XML 文件。没有网络交互。

配置文件的重要元素是：

private static final List<StrategyConfiguration<Transaction>> EMPTY_CONFIGURATION_LIST = Collections.emptyList();
private List<StrategyConfiguration<Transaction>> configurations;
@XmlElementWrapper(name = "boundaries")
@XmlElements({
    @XmlElement(name = "a", type = abtStrategyConfig.class),
    @XmlElement(name = "b", type = bbtStrategyConfig.class),
    @XmlElement(name = "c", type = cbtStrategyConfig.class)
})
public void setConfigurations(List<StrategyConfiguration<Transaction>> configurations) {
    this.configurations = configurations;
}
public List<StrategyConfiguration<Transaction>> getConfigurations() {
    if (configurations == null) {
        return EMPTY_CONFIGURATION_LIST;
    }
    return configurations;
}

我没有时间调查“为什么”，但调试运行显示了导致问题的“什么”。在 setter 之前调用了 null 安全的“get”访问器。我想这是为了提供类型安全检查。“空”列表被返回，非空，然后用作后续集合的基础。

我发现通过提供一个直接的 setter 和 getter，然后提供一个 null 安全的 getter 供外部使用，我清除了错误。

private static final List<StrategyConfiguration<Transaction>> EMPTY_CONFIGURATION_LIST = Collections.emptyList();
private List<StrategyConfiguration<Transaction>> configurations;
@XmlElementWrapper(name = "boundaries")
@XmlElements({
    @XmlElement(name = "a", type = abtStrategyConfig.class),
    @XmlElement(name = "b", type = bbtStrategyConfig.class),
    @XmlElement(name = "c", type = cbtStrategyConfig.class)
})
public void setJaxBConfigurations(List<StrategyConfiguration<Transaction>> configurations) {
    this.configurations = configurations;
}
public List<StrategyConfiguration<Transaction>> getJaxBConfigurations() {
    return configurations;
}
public List<StrategyConfiguration<Transaction>> getConfigurations() {
    List<StrategyConfiguration<Transaction>> response = getConfigurationConfigs();
    if (response == null) {
        response = EMPTY_CONFIGURATION_LIST;
    }
    return response;
}
于 2012-12-16T22:03:52.660 回答