reload properties from url

[Karen Gomes]

Hello Friends,

My current application uses a properties file that works fine. However at runtime, in case there is an error, like it could not find the queue defined in the properties file then I need my app to go to a url and get properties from there, rewrite the old properties file and reload.

I'm able to read the data from the url but not sure how to rewrite the properties file. I'm using this code to read the contents from the url:

 
 
try {
        // Create a URL for the desired page
        URL url = new URL("http://localhost/aaa.properties");
    
        // Read all the text returned by the server
        BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
        String str;
        while ((str = in.readLine()) != null) {
System.out.println(str);
            // str is one line of text; readLine() strips the newline character(s)
        }
        in.close();
    } catch (MalformedURLException e) {
System.out.println(e);
    } catch (IOException e) {
System.out.println(e);
}

Any help will be appreciated.

Thanks
Karen

[Mehul Sanghvi]

Hi,

I hope this helps:

public class PropertyReader  
{

Properties props = new Properties();
private String propertyFile;

public PropertyReader(String propertyFile) throws Exception {
try{
this.propertyFile = propertyFile;
props.load(new FileInputStream(propertyFile));
}
catch(IOException ie) {
throw new Exception("Error in loading Config File");
}
}
 
public void set(String key,String value) {
props.put(key, value);
}

public String get(String key) throws Exception {
Object obj = props.get(key);
if(obj != null)
return ((String)obj);
else {
throw new Exception("Could not fin Property "+key);
}
}
    
public void store() throws Exception {
try{
props.store(new FileOutputStream(propertyFile),"");
}
catch(IOException exception) {
throw new Exception("Error in saving Config File" +
                                              propertyFile );
}
}
 
    public Enumeration getKeys() throws Exception
    {
        Enumeration enum = null;
        try
        {
            enum = props.keys();
        }
        catch(Exception e)
        {
            throw new Exception("Error in retrieving keys from properties" +
                                 + " file.");
        }
        return enum;
    }
}