package org.webslinger.io;

 import java.util.HashMap;

 public abstract class GenericRollingWriterFactory implements RollingWriterFactory {

     private final HashMap<String, RollingWriter> writers = new HashMap<String, RollingWriter>();

     public final RollingWriter getRollingWriter(String name) {

         synchronized (writers) {

             RollingWriter rollingWriter = (RollingWriter) writers.get(name);

             if (rollingWriter != null) return rollingWriter;

             rollingWriter = newRollingWriter(name);

             writers.put(name, rollingWriter);

             return rollingWriter;

         }

     }

     protected abstract RollingWriter newRollingWriter(String name);

 }