Question

当我尝试组合JAX-WS Web服务端点类和简单的CDI注入时，我遇到了奇怪的行为。当我尝试将对象注入WebService实现类时，从不调用注入对象的PostConstruct方法。实际上，类构造函数也没有被调用。

这是我的JAX-WS实现类和注入点：

@WebService(serviceName="eNC3BusinessWebService")
public class eNC3BusinessWebServiceImpl
{

    @WebMethod
    public SubmissionValidationResults xmlValidation(String xml, String submissionType, String schemaVersion)
            throws SOAPException
    {          
        // Validate schema
        SubmissionValidationResults results = fileSubmissionServiceHandler.validateXML(xml, submissionType,
                schemaVersion);

        return results;
    }

    @Inject
    private FileSubmissionServiceHandler fileSubmissionServiceHandler;

    @Inject
    private BRSubmissionService brSubmissionService;
}

这是我注入的类，FileSubmissionServiceHandler：

public class FileSubmissionServiceHandler
{
    public FileSubmissionServiceHandler()
    {
        System.out.println("Constructor being called on FileSubmissionServiceHandler");
    }

    @PostConstruct
    public void init()
    {
        final String webserviceURL = "https://hostname/FileSubmissionService/FileSubmissionService.svc";
        final String username = "username";
        final String password = "password";

        this.webservice = new BasicHttpsBinding_IFileSubmissionServiceProxy(username, password);
        Descriptor desc = webservice._getDescriptor();
        desc.setEndpoint(webserviceURL);
    }

    public SubmissionValidationResults validateXML(String xml, String submissionType,
            String schemaVersion) throws WebServiceException
    {
        SubmissionValidationResults results = null;
        FormType type = FormType.getByName(submissionType);
        String submissionTypeCode = type.getCode();

        try
        {
            results = this.webservice.validateXmlFile(xml, submissionTypeCode, schemaVersion);

        }
        catch (Exception e)
        {
            logger.error("Internal FileSubmissionService threw an exception", e);
            throw e;
        }

        return convertSubmissionValidationResults(results);
    }

    private BasicHttpsBinding_IFileSubmissionServiceProxy webservice;
}

我被要求发布我的服务器XML（由于一次运行两个Liberty配置文件副本而覆盖端口设置）：

<server description="new server">

<!-- Enable features -->
<featureManager>
    <feature>jaxws-2.2</feature>
    <feature>servlet-3.1</feature>
    <feature>cdi-1.2</feature>
</featureManager>

<!--For a user registry configuration, configure your user registry. For 
    example, configure a basic user registry using the basicRegistry element. 
    Specify your own user name below in the name attribute of the user element. 
    For the password, generate an encoded password using bin/securityUtility 
    encode and add it in the password attribute of the user element. Then uncomment 
    the user element. -->
<basicRegistry id="basic" realm="BasicRealm">
    <user name="wasadmin" password="{xor}KD4sPjsyNjE=" />
</basicRegistry>

<keyStore password="{xor}KD4sPjsyNjE=" />

<!-- To access this server from a remote client add a host attribute to 
    the following element, e.g. host="*" -->
<httpEndpoint host="*" httpPort="9090" httpsPort="9445"
    id="defaultHttpEndpoint" />

<wasJmsEndpoint wasJmsPort="7277" wasJmsSSLPort="7287" />

<iiopEndpoint host="localhost" id="defaultIiopEndpoint"
    iiopPort="2814">
    <iiopsOptions iiopsPort="2815" />
</iiopEndpoint>

<applicationMonitor updateTrigger="mbean" />

<enterpriseApplication id="eNC3BusinessWebService_EAR"
    location="eNC3BusinessWebService_EAR.ear" name="eNC3BusinessWebService_EAR" />

并记录：

Launching defaultServer (WebSphere Application Server 8.5.5.6/wlp-1.0.9.cl50620150610-1749) on Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_79-b15 (en_US)
[AUDIT   ] CWWKE0001I: The server defaultServer has been launched.
[AUDIT   ] CWWKE0100I: This product is licensed for development, and limited production use. The full license terms can be viewed here: https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/wasdev/license/base_ilan/ilan/8.5.5.6/lafiles/en.html
[AUDIT   ] CWWKZ0058I: Monitoring dropins for applications. 
[WARNING ] CWNEN0047W: Resource annotations on the fields of the xxx.important.not.external.service.eNC3BusinessWebServiceImpl class will be ignored. The annotations could not be obtained because of the exception : java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContextAware
[AUDIT   ] CWWKT0016I: Web application available (default_host): http://localhost:9090/eNC3BusinessWebService/
[AUDIT   ] CWWKZ0001I: Application eNC3BusinessWebService_EAR started in 3.011 seconds.
[AUDIT   ] CWWKF0012I: The server installed the following features: [jaxws-2.2, cdi-1.2, servlet-3.1, jndi-1.0, javaMail-1.5, jaxb-2.2].
[AUDIT   ] CWWKF0011I: The server defaultServer is ready to run a smarter planet.
20-01-2016 - 10:02:47 - INFO  (eNC3BusinessWebServiceImpl.java:31) - --- Validating Incomming Form XML ---
20-01-2016 - 10:02:47 - INFO  (eNC3BusinessWebServiceImpl.java:33) - Received Payload: XML [Hello]
20-01-2016 - 10:02:47 - INFO  (eNC3BusinessWebServiceImpl.java:34) - SubmissionType [from the]
20-01-2016 - 10:02:47 - INFO  (eNC3BusinessWebServiceImpl.java:35) - SchemaVersion [other side]
[WARNING ] Application {http://service.external.not.important.xxx/}eNC3BusinessWebService#{http://service.external.not.important.xxx/}xmlValidation has thrown exception, unwinding now
java.lang.NullPointerException

我已经编辑了每个类的一些不太相关的细节，但基本操作是相同的。当我尝试访问＆＃34; validateXML＆＃34; fileSubmissionServiceHandler对象的方法，抛出空指针异常，我从未在FileSubmissionServiceHandler类中看到postConstruct或构造函数方法的输出。使用调试器，永远不会达到这些方法。

到目前为止我检查过的事情：

我的WEB-INF文件夹中有一个空的beans.xml文件
我在server.xml中包含javaee-7.0功能，其中包括jax-ws和cdi
我也尝试将应用程序范围和请求范围都添加到FileSubmissionServiceHandler而不起作用。

有没有人有任何想法为什么这不起作用？

Answer 1

看起来由于某种原因没有进行注射。因此，构造函数和PostConstruct没有被调用，然后你点击了NPE。可以附上你的应用程序，以便我可以进一步查看吗？

Answer 2

由于你没有粘贴日志，也没有粘贴配置文件，server.xml等。我试图在8.5.5.6上产生问题，但我发现我可以做注入并调用post构造函数方法。

我的测试用例与您的相似。唯一的区别是我没有使用javaee-7.0功能，因为它需要在server.xml中进行更多配置，但只包含以下功能：

jaxws-2.2，servlet-3.1，cdi-1.2

请试试。

如果仍然无效，请确保无需注射即可正常工作。您最好将日志和完整的server.xml粘贴到问题确定中。

Answer 3

好的，我终于找出了问题的原因。

CDI正在加载名为BRSubmissionService的对象。弹簧异常会中断CDI加载。由于CDI无法完成，因此不会发生剩余的CDI注入，并且我的FileSubmissionService对象未加载，导致我的空指针异常。

解决方案是修复位于另一个jar中的BRSubmissionService对象内的spring错误，遗憾的是我从另一个开发人员那里继承了该错误。这就是生活。

JAX-WS和CDI不能在WAS Liberty Profile 8.5.5.6上一起工作

3 个答案: