Thread.currentThread() unique for each server request?

Question

Hello
I have a hosted application in glassfish. When there is a http request I write a file to disk in server machine.
I am just wondering in writer.class can I use Thread.currentThread() as a unique identification for each and every request?
Thank you

Answer 1

I am sorry. I made the question wired by adding unnessasary things.
Let me ask it simple, can I replace the singleton class IDpool with a class with a static variable id. like following
IDpool class (singleton and map<thread, id>)
public class IdPool {
    protected static IdPool pool = null;
    protected static Map<Thread,Long> idmap = new HashMap<Thread,Long>();
    public static Map<Thread,Long> getIdMap()
        return idmap;
    public static IdPool getSingleInstance()
        if(IdPool.pool==null)
            IdPool.pool = new IdPool();
        return IdPool.pool;
    public synchronized Long makeNewId(Thread thread)
        Long id =  Calendar.getInstance().getTimeInMillis();
        IdPool.idmap.put(thread,id);
        return id;
    public synchronized Long getId(Thread thread)
        return IdPool.idmap.get(thread);
}replace above with following
class IDClass
   public static long ID;
}In request handler class
// make new id
IDClass.ID = 123;In FileWriter.class
// get ID
long id = IDClass.ID;Because for each and every request it starting as a new application. Application means calling for the backend Request handler and file writer program I have made. Those are in a seperate jar file.The same instance of the application never used by two request. And once the request is finished application initialize for that particular request close down.
EJP, thank you very much for your kind attention for this matter.