Question

我有一个程序，其中包含与在SQL Server上运行的PLM应用程序的HTTP连接。该计划计划每天运行。它从几个来源收集数据，然后向PLM发出查询以存储数据，最后读取PLM的回复以验证数据是否被正确存储。

应用程序运行正常，直到我们升级了DB（进入SQL Server 2012）和PLM。

此后升级，当程序建立连接时，它接收OK状态;但是，数据设置查询不会影响数据库，也没有收到答复。没有错误消息 - 只是故障。

我的主要问题是 - 如何调试它。我知道我发送的东西和收到的东西。如何获得有关两者之间发生情况的更多数据？

我附上代码供审核。我没有在这里添加的是查询本身，它是类似WML的字符串。无论收到的查询是什么，PLM都应该触发答案，即使它是错误消息。但是，我只得到NULL。

public Boolean amlArasCommunication (String data , int targetDbType, String passWord)
{
        final String url = "http://plm-srv/InnovatorServer/Server/InnovatorServer2012.aspx";
        final String schemeUrl = "'http://schemas.xmlsoap.org/soap/envelope/'";
        String answer =””;
        String dataBase = data base name;
        Writer wout;
        HttpURLConnection amlConnection = null;

        try 
        {
// instantiate the HttpURLConnection with the URL object - A new connection is 
// opened every time by calling the openConnection method of the protocol 
// handler for this URL. This is the point where the connection is opened.
            amlConnection = (HttpURLConnection) new URL(url).openConnection();
            amlConnection.setDoOutput(true);
            amlConnection.setDoInput(true);
            amlConnection.setRequestMethod("POST");
            amlConnection.setRequestProperty("SOAPAction", "ApplyAML");
            amlConnection.setConnectTimeout(10000);
            amlConnection.setReadTimeout(10000);
            amlConnection.setRequestProperty("AUTHUSER", "Admin");
            amlConnection.setRequestProperty("AUTHPASSWORD", calcMD5(passWord));
            amlConnection.setRequestProperty("DATABASE", dataBase);

            String query = "<?xml version='1.0'?>\r\n" + 
                "<SOAP-ENV:Envelope xmlns:SOAP-ENV=" + schemeUrl + ">\r\n" + 
                "  <SOAP-ENV:Body>\r\n" + 
                data  + 
                "  </SOAP-ENV:Body>\r\n" + 
                "</SOAP-ENV:Envelope>\r\n";

// instantiate OutputStreamWriter using the output stream, returned from getOutputStream, that writes
// to this connection. If an I/O error occurs while creating the output stream, IOException will be fired.
            wout = new OutputStreamWriter(amlConnection.getOutputStream());
            wout.write (query);
            wout.close();

// At this point, we've sent all the data. The outputStream was closed, while the connection is still open
            int result;
            if ((result = amlConnection.getResponseCode()) == HttpURLConnection.HTTP_OK)
            {
// Get the communication results from the PLM
                InputStream ac = amlConnection.getInputStream();
                InputStreamReader isr = new InputStreamReader (ac);
                BufferedReader in = new BufferedReader(isr);
                String readResult = in.readLine ();
                int count = 0;
                while (readResult != null)
                {
                    answer += readResult + "\n";
                    readResult = in.readLine ();
                    count++;
                }
                in.close();
                if (answer.contains("fault"))
                    System.out.println ("Error message: " + answer + "\nQuery: " + query);
                else 
                    log.message ("Lines count=" + count + "; com status=" + result + "; reply: " + answer, false);
            }
            else
 // Error code is returned, or no status code is returned, do stuff in the else block
                System.out.println("Connection failed with the following code: " + result);
        }
        catch (IOException e) { ; }

        if (amlConnection != null)
            amlConnection.disconnect ();
        return true;
}

Answer 1

我认为您必须查看PLM应用程序的日志文件，以找出没有获得HTTP响应的原因。升级后应用程序不再工作的原因可能有很多。

我想仅根据客户端代码调试问题很困难。由于服务器似乎接受了您的HTTP，我希望这个事件和错误会被写入某个日志文件。您可能还想尝试一些像SOAP UI这样的图形工具来测试SOAP服务。

为什么我的应用程序停止使用HTTP连接，我该如何调试它？

1 个答案: