Question

所以我通过WSO2 ESB映射了WSO2 DSS服务。我已经生成了一个jax-ws客户端，并且我成功地使用它来获取一些数据。

问题在于，有时当我打电话给客户端时，它会抛出一个

Exception in thread "main" java.lang.NullPointerException
at com.sirmaitt.egov.codelist.client.Client.main(Client.java:77)

在源代码的那一行，我试图在控制台中打印响应数据。

这是我用来调用服务的代码

    // Initialize service
        Codelists_Service service = new Codelists_Service();

        // Adds custom handler so we can add custom SOAP security header.
        service.setHandlerResolver(new HandlerResolver() {
            @SuppressWarnings("rawtypes")
            public List<Handler> getHandlerChain(PortInfo portInfo) {
                List<Handler> handlers = new ArrayList<Handler>();
                handlers.add(new SecuritySOAPHandler());
                return handlers;
            }
        });

        CodelistsPortType port = service.getCodelistsHttpsSoap11Endpoint();

        Codelists codelists = null;
        try {
            codelists = port.getcodelists();
        } catch (DataServiceFault e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // Prints the response.
        for (Codelist cList : codelists.getCodelist()) {
}

项目的其余部分主要是jax-ws生成的类和一个自定义SOAPHandler，我用它来添加安全头。

问题是当我登录WSO2 ESB并点击我在那里映射的服务时，同一个客户端实际上开始工作。当我不使用该服务一段时间时，它会抛出异常。

这个问题让我很困惑。可能是什么原因造成的？

编辑：澄清，第77行的代码是for循环。似乎代码列表对象为null。

编辑：以下是为请求添加安全标头的方法。

public boolean handleMessage(SOAPMessageContext messageContext) {
    Boolean isOutboundMessage = (Boolean) messageContext
            .get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);

    if (isOutboundMessage) {
        SOAPPart messageSoapPart = messageContext.getMessage()
                .getSOAPPart();

        WSSecHeader securityHeader = new WSSecHeader();
        securityHeader.insertSecurityHeader(messageSoapPart);

        WSSecUsernameToken usernameToken = new WSSecUsernameToken();

        usernameToken.setPasswordType(WSConstants.PASSWORD_TEXT);
        usernameToken.setUserInfo(USER_NAME, PASSWORD);

        WSSecTimestamp timestamp = new WSSecTimestamp();

        usernameToken.build(messageSoapPart, securityHeader);
        timestamp.build(messageSoapPart, securityHeader);
    }

    return true;
}

这是请求的样子（取自控制台）

    ---[HTTP request]---
SOAPAction: "urn:_getcodelists"
Accept: text/xml, multipart/related, text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Content-Type: text/xml;charset="utf-8"
<?xml version="1.0" ?><S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"><S:Header><wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" S:mustUnderstand="1"><wsu:Timestamp xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="Timestamp-11800260"><wsu:Created>2012-09-18T13:17:56.707Z</wsu:Created><wsu:Expires>2012-09-18T13:22:56.707Z</wsu:Expires></wsu:Timestamp><wsse:UsernameToken xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="UsernameToken-9299042"><wsse:Username>admin</wsse:Username><wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText">admin</wsse:Password></wsse:UsernameToken></wsse:Security></S:Header><S:Body></S:Body></S:Envelope>--------------------
---[HTTP response 202]---
Transfer-encoding: chunked
null: HTTP/1.1 202 Accepted
Connection: keep-alive
Server: Synapse-HttpComponents-NIO
Date: Tue, 18 Sep 2012 13:19:57 GMT

Answer 1

我认为这是因为您的会话超时，您需要再次登录才能对服务进行身份验证。

问题与wso2 jax-ws客户端有关

1 个答案: