java - Logger in HashMap -

i'm using java logger class log stuff , depending on data need configure log routes.

let have following code:

public class loggerlocator {   private static hashmap<string, logger> loggermap = new hashmap<string, logger>();   private static int count = 0;    public logger getlogger(string id) {     if(!loggerlocator.loggermap.containskey(id)) {       configure(id);     }     return loggerlocator.loggermap.get(id);   }    private void configure(string id) {     logger logger = logger.getlogger(loggerlocator.class.getname());     filehandler fh = new filehandler(string.format("/home/abc/logs/mylog_%d.log", id), true);     filehandler.setformatter(new myformatter());     logger.addhandler(fh);   }    loggerlocator.count++;   loggerlocator.loggermap.put(id, logger); } 

my problem when extress test sending lot of requests server, printed count variable in every request, expected have value of 1 instead of getting value of 2 , 2 files name mylog_{id}.log, mylog_{id}.log.1

is posibble loggermap empty before create first logger , assigning hashmap , thread getting false in loggerlocator.loggermap.containskey(id)?

yes, it's not possible loggermap empty before create first logger, empty. define variable empty map. if you'd restrict access map single thread @ time need use syncrhonized keyword somewhere. additionally not recommend putting loggerlocator.count++; or loggerlocator.loggermap.put(id, logger); outside of methods. strikes me anti-pattern. methods getlogger , configure should static , class definition should abstract avoid being able to/having instantiate instance of loggerlocator.