Re: Servlet Properties

["Bruce Jin" <JIN007M@xxxxxxxxxxx>]

 I use absolute location to tell servlet where to find a file.
File file = new File("/home/myfile.txt").

 To tell servlet which driver to use I use a few lines of code to detect if
the servlet is running on window or on A400. This way I don't have to use a
property file.

 class JDBCDataSource {

  private Connection conn;
  private String toolboxDriver = "com.ibm.as400.access.AS400JDBCDriver";
  private String db2Driver = "com.ibm.db2.jdbc.app.DB2Driver";
  private String toolboxURL = "jdbc:as400://myas400";
  private String db2URL = "jdbc:db2://*LOCAL";

   public JDBCDataSource() {

     String os   = System.getProperty("os.name");
     try  // load jdbc driver...
    {
      if (os.indexOf("Windows") >=0 )
      {
        System.out.println("This is a Window OS!");
        Class.forName(toolboxDriver);
      } else {
        System.out.println("This is an AS400!");
        Class.forName(db2Driver);
      }
    } catch(ClassNotFoundException exc) {
      System.out.println("no jdbc");
    }

    try  // Connect to database...
    {
      if (os.indexOf("Windows") >=0 )

       conn = DriverManager.getConnection(toolboxURL,"JIN","passwd");
      } else {
        conn = DriverManager.getConnection(db2URL);
      }
    } catch(SQLException exc) {

      System.out.println("connection failed");

    }

  }

----- Original Message -----
From: "Price, Chris" <chris_price@nsb.co.uk>
To: <java400-l@midrange.com>
Sent: Wednesday, January 02, 2002 5:19 AM
Subject: Servlet Properties


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> All,
>
> I have a servlet which is using the Toolbox JDBC driver to access the
AS/400
> database. This is running fine, both in the WTE and when distributed to
WAS
> on the 400.
>
> However I believe (correct me if I'm wrong) that it will be more efficient

> to use the native driver when running on the 400. So rather than
recompiling
> the code, I want to use a properties file to tell my servlet which class
to
> use.
>
> So I add the following code to my servlet:
>
> File propPath = new File("mydir\\my.properties");
> myProperties = new Properties();
>
> file://Load Properties from File
> try {
> in = new FileInputStream(propPath);
> myProperties.load(in);
> in.close();
> } catch (IOException e) {
> }
>
> If I run this code in a "normal" java class, (i.e. with a main method), a
> properties file my.properties  is created, if one does not already exist,
in
> the specified directory. If I put the code in the servlet, I get a file
not
> found exception.
>
> How can I avoid the exception (why can't the servlet create the file?).
> Alternatively, where should I create the file manually, so the servlet
> engine finds it?
>
> Thanks,
> Chris.
>
>
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