Jan*_*ala 8 java web-services jax-ws java-8
我有JaxWS Web服务客户端,多年来一直在Java 6中成功运行.现在,当Java升级到版本8时,我们在获取端口时会收到NullPointerException
java.lang.NullPointerException
at com.sun.xml.internal.ws.client.ClientContainer$1.getResource(Unknown Source)
at com.sun.xml.internal.ws.assembler.MetroConfigLoader.locateResource(Unknown Source)
at com.sun.xml.internal.ws.assembler.MetroConfigLoader.locateResource(Unknown Source)
at com.sun.xml.internal.ws.assembler.MetroConfigLoader.init(Unknown Source)
at com.sun.xml.internal.ws.assembler.MetroConfigLoader.<init>(Unknown Source)
at com.sun.xml.internal.ws.assembler.TubelineAssemblyController.getTubeCreators(Unknown Source)
at com.sun.xml.internal.ws.assembler.MetroTubelineAssembler.createClient(Unknown Source)
at com.sun.xml.internal.ws.client.Stub.createPipeline(Unknown Source)
at com.sun.xml.internal.ws.client.Stub.<init>(Unknown Source)
at com.sun.xml.internal.ws.client.Stub.<init>(Unknown Source)
at com.sun.xml.internal.ws.client.Stub.<init>(Unknown Source)
at com.sun.xml.internal.ws.client.sei.SEIStub.<init>(Unknown Source)
at com.sun.xml.internal.ws.client.WSServiceDelegate.getStubHandler(Unknown Source)
at com.sun.xml.internal.ws.client.WSServiceDelegate.createEndpointIFBaseProxy(Unknown Source)
at com.sun.xml.internal.ws.client.WSServiceDelegate.getPort(Unknown Source)
at com.sun.xml.internal.ws.client.WSServiceDelegate.getPort(Unknown Source)
at com.sun.xml.internal.ws.client.WSServiceDelegate.getPort(Unknown Source)
at com.sun.xml.internal.ws.client.WSServiceDelegate.getPort(Unknown Source)
at javax.xml.ws.Service.getPort(Unknown Source)
at myclient.stub.MyService.<init>(MyService.java:38)
我已经尝试使用Java 7版本1.7.0_80运行它并且它也可以工作,但Java 8的第一个版本会导致此异常.
我已经用这个打了很长时间了,所以如果有人能给我任何线索从哪里开始修复它会非常棒.
这是WSDL,我编辑了一点,因为它不是我的服务,但希望它足够了？
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<wsdl:definitions xmlns:ns1="http://www.dummyservice/sample/interface" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="Sample"
targetNamespace="http://www.dummyservice/sample/interface">
<wsdl:types>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:jaxb="http://java.sun.com/xml/ns/jaxb"
targetNamespace="http://www.dummyservice/sample/interface" xmlns="http://www.dummyservice/sample/interface"
elementFormDefault="qualified" jaxb:version="2.0">
<xs:element name="PersonQuery">
<xs:complexType>
<xs:sequence>
<xs:element name="system" type="xs:string" />
<xs:element name="user" type="xs:string" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="PersonReply">
<xs:complexType>
<xs:sequence>
<xs:element name="Header" type="HeaderType" />
<xs:element name="person" type="PersonType" minOccurs="0" maxOccurs="1" />
<xs:element name="address" type="AddressType" minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:complexType name="HeaderType">
<xs:sequence>
<xs:element name="tila" type="StatusType" />
</xs:sequence>
</xs:complexType>
<xs:simpleType name="StatusType">
<xs:annotation>
<xs:appinfo>
<jaxb:typesafeEnumClass>
<jaxb:typesafeEnumMember name="SUCCESS" value="0001" />
<jaxb:typesafeEnumMember name="FAIL" value="0000" />
</jaxb:typesafeEnumClass>
</xs:appinfo>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:enumeration value="0000" />
<xs:enumeration value="0001" />
</xs:restriction>
</xs:simpleType>
<xs:complexType name="PersonType">
<xs:sequence>
<xs:element name="firstname" type="xs:string" minOccurs="0" />
<xs:element name="lastname" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
<xs:complexType name="AddressType">
<xs:sequence>
<xs:element name="addresstype" type="AddresstypeType" minOccurs="0" />
<xs:element name="streetaddress" type="xs:string" minOccurs="0" />
<xs:element name="city" type="xs:string" minOccurs="0" />
<xs:element name="postalcode" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
<xs:simpleType name="AddresstypeType">
<xs:annotation>
<xs:appinfo>
<jaxb:typesafeEnumClass>
<jaxb:typesafeEnumMember name="HOME" value="001" />
<jaxb:typesafeEnumMember name="OFFICE" value="002" />
</jaxb:typesafeEnumClass>
</xs:appinfo>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:enumeration value="001" />
<xs:enumeration value="002" />
</xs:restriction>
</xs:simpleType>
</xs:schema>
</wsdl:types>
<wsdl:message name="PersonQueryOperationRequest">
<wsdl:part element="ns1:PersonQuery" name="parameters" />
</wsdl:message>
<wsdl:message name="PersonQueryOperationResponse">
<wsdl:part element="ns1:PersonReply" name="parameters" />
</wsdl:message>
<wsdl:portType name="SamplePort">
<wsdl:operation name="PersonQueryOperation">
<wsdl:input message="ns1:PersonQueryOperationRequest" />
<wsdl:output message="ns1:PersonQueryOperationResponse" />
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="SampleSOAP" type="ns1:SamplePort">
<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" />
<wsdl:operation name="PersonQueryOperation">
<soap:operation soapAction="http://www.dummyservice/sample/interface/SampleOperation" />
<wsdl:input>
<soap:body use="literal" />
</wsdl:input>
<wsdl:output>
<soap:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="SampleService">
<wsdl:port binding="ns1:SampleSOAP" name="Sample">
<soap:address location="https://127.0.0.1/data/ws" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
编辑:类加载似乎是问题,在ClientContainer中,上下文类加载器和类'类加载器都为null.
private final ResourceLoader loader = new ResourceLoader() {
public URL More ...getResource(String resource) throws MalformedURLException {
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if (cl == null) {
cl = this.getClass().getClassLoader();
}
return cl.getResource("META-INF/"+resource);
}
};
当我们在调用ws调用之前显式地将系统类加载器设置为上下文类加载器时,它开始工作.但这是一个很好的解决方案吗？我想知道为什么这已经停止在Java8中工作了,这可能是他们的ws实现中的问题吗？
问候,
詹恩
在从Java 6升级到Java 8之后,我们一直在看到这个问题(相同的堆栈跟踪和所有问题).我将首先发布我们的解决方案,然后进行其他解释.
对我们来说,出现此问题的主要条件是:
解决方法:
当你调用Service.getPort(Class<T>)它时,它需要在它自己的线程中完成,与之前运行的调用的线程分开.这允许你有机会将该线程上的ClassLoader设置为不是引导类加载器的ClassLoader,这是问题的症结所在ClientContainer.java(下面有更多解释).以下是一些适用于我们的示例代码.您必须根据自己的需要进行修改.
public class YourClass {
private YourWebService yourWebService;
// You may want to synchronize on this method depending on your use case
public YourWebService getYourWebService() {
if ( this.yourWebService == null ) {
// We create a thread so that we can set the ClassLoader
Thread t = new Thread() {
public void run() {
synchronized(this) {
// Get the string of your webservice WSDL from somewhere
String url = "http://YOURHOST:YOURPORT/your-web-service/YourWebService?wsdl";
URL srvUrl = null;
try {
srvUrl = new URL( url );
} catch ( MalformedURLException ex ) {
throw new RuntimeException( String.format( "Malformed URL: %s", url ), ex );
}
QName qName = new QName( "your-webservice-namespace", "YourWebServiceName" );
Service service = Service.create( srvUrl, qName );
this.yourWebService = service.getPort( YourWebService.class );
notify();
}
}
};
// Thread.currentThread().getContextClassloader()
// returns null in com.sun.xml.internal.ws.client.ClientContainer.
// (See http://hg.openjdk.java.net/jdk8/jdk8/jaxws/file/d03dd22762db/src/share/jaxws_classes/com/sun/xml/internal/ws/client/ClientContainer.java, lines 39-47)
// To work around that, I force setting of the ContextClassLoader
// on this thread (in which the Service.getPort() method will run) so
// that when ClientContainer calls Thread.currentThread().getContextClassLoader(), it doesn't get a null
// (i.e., the bootstrap classloader).
//
t.setContextClassLoader( YourClass.class.getClassLoader() );
t.start();
// Wait until above thread completes in order to return yourWebService
synchronized( t ) {
try {
t.wait();
} catch ( InterruptedException e ) {
e.printStackTrace();
}
}
}
return this.yourWebService;
}
}
其他背景和细节:
为我们诊断这个问题的困难在于,问题只发生在启动嵌入式JVM的Windows产品中.如果没有对该JVM进行远程调试,则需要更长时间才能解决问题的根源.一旦我看到1)当我运行调用Service.getPort(Class<T>)独立JVM(在Windows产品之外)内部的相同代码时,2)ClientContainer该类能够获取当前线程的ClassLoader,并且3)返回的ClassLoader不是引导程序ClassLoader(即,不是null),它让我意识到我必须找到一种方法来确保ClientContainer运行的线程不会获得引导程序ClassLoader.接下来的目标是看看我是否能找到一种方法来改变由此解决的ClassLoaderClientContainer 码.
ClientContainer来源:http://hg.openjdk.java.net/jdk8/jdk8/jaxws/file/d03dd22762db/src/share/jaxws_classes/com/sun/xml/internal/ws/client/ClientContainer.java
请注意,ClientContainer源代码中有两次尝试解析类加载器.问题是,如果这两个尝试都返回引导类加载器,则会在第45行产生NullPointerException,因为cl它将为null:
cl.getResource("META-INF/"+resource);
此解决方法确保ClientContainer代码解析的类加载器将是您在线程上设置的类加载器.
我已经为JAX-WS团队提交了一张调查问题的门票:现在在GitHub#1178上的原始java.net链接.
尝试在 Java8 中再次生成 Web 服务客户端的存根。
通常我们会生成一个存根罐子并将其放入类路径中。鉴于 Java 是向后兼容的，我们在升级到更高版本时跳过重新生成 jar 的步骤。
但由于 Java 6 和 7 可以正常工作，并且仅在 Java 8 中失败，因此我建议再次生成存根，以排除 Java 8 向后兼容性中的任何故障。
| 归档时间： |
|
| 查看次数： |
4272 次 |
| 最近记录： |