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Thread: calling a create statement method but unable to figure out how in my scenario

  1. #1
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    Default calling a create statement method but unable to figure out how in my scenario

    Right now, I have something like the following in my try block:


        try
          {
            connRemote = DriverManager.getConnection("jdbc:mysql://xx.xx.x.xxx:3306/test",MainUser,MainPass);
     
            String maindbsql = null;
            maindbsql = "SELECT IP_vch FROM Mytableinxx_xx_x-xxx WHERE IPStatus = 1 "; // Let's says the result fo the query is aa.aa.a.aaa,bb.bb.b.bbb out of 10 IP Addresses present over there.
     
            Map<String,Connection> connections = new HashMap<>();
            DeviceStmt = connRemote.createStatement();
            DeviceRS = DeviceStmt.executeQuery(maindbsql);
     
            while(DeviceRS.next()){
     
                final String ip_address = DeviceRS.getString("IP_vch");
                System.out.println("Value of IP_vch Field:"+ip_address);
     
                connections.put(ip_address,DriverManager.getConnection("jdbc:mysql://" + ip_address + ":3306/test",RemoteUser,RemotePass));
     
                if(connections.isEmpty()){
                System.err.println("Status not set to 1 for any of the databases");
                }
     
            }//END Of while(DeviceRS.next())
     
    		String QueryString = "SELECT query goes here";
    		SelectResultsStmt = (Don't know what to put here?).createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
            SelectResultsRS = SelectResultsStmt.executeQuery(QueryString);
     
    	  }//ENd Of Try block
     
          catch(SQLException ex){
                ex.printStackTrace();
          }


    So, for each of the IPAddresses that I got above in the `maindbsql`, that is `aa.aa.a.aaa` and `bb.bb.b.bbb` I want to call the `createStatement()` method in the following line mentioned in the above code:

     SelectResultsStmt = (Don't know what to put here?).createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);

    Since, while establishing connection to these two IPAddresses, I am using `connections.put()` method as follows in the above code:

    connections.put(ip_address,DriverManager.getConnection("jdbc:mysql://" + ip_address + ":3306/test",RemoteUser,RemotePass));

    I don't have anything like Connection object `connRemote` that I have used for `xx.xx.x.xxx`, for my IP addresses aa.aa.a.aaa and bb.bb.b.bbb .

    Could anyone please let me know if there is any way to overcome this problem?

    Please let me know if I can answer any questions from my end.






    P.S: The IP addresses I have used in my real code are IPV4 addresses and not alphabets.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: calling a create statement method but unable to figure out how in my scenario

    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: calling a create statement method but unable to figure out how in my scenario

    Yes. Could you answer?

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    Default Re: calling a create statement method but unable to figure out how in my scenario

    No, I was just pointing it out for others.
    See: http://www.javaprogrammingforums.com...s-posting.html
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: calling a create statement method but unable to figure out how in my scenario

    Okay, that would be helpful for others if they read replies from other forums as well but no one has answered as of yet.

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