How to get the server port and id from the Initialcontext

Question

hi
i know that i can get the server port and id where the jndi service is listening from the InitialContext ( when i create InitialContext ic = new InitialContext(); from within a EJB. ). Does this work on any application server and where (at what position is for example the port) in the Enumeration at the ic are the different things put?

Answer 1

I would usually just get the PROVIDER_URL property from the InitialContext and use that to determine the location of the naming service:
String providerURL = (String)ic.getEnvironment().get(Context.PROVIDER_URL);You'll then need to parse that string to obtain the port and the server name. For example:
// Assume that the provider URL is of form "protocol://server:port"
int serverStartIndex = providerURL.indexOf("://" + 3);
int serverEndIndex = providerURL.indexOf(:, serverStartIndex);
String server = providerURL.substring(serverStartIndex, serverEndIndex);
String port = providerURL.substring(serverEndIndex + 1);It's a fairly universal approach but there'll doubtlessly be some special cases (for example, the provider URL could be null and the InitialContextFactory class defaults it).
You might have to adjust the server/port parsing stuff a bit as I just made that up and your URL might not conform to the pattern I described.
Hope this helps.