workspace/.metadata/.plugins/org.eclipse.core.resources/.history/4c/a05c3cd8eb6500111e5bcf098ae37dc9

   1 package com.yuji.tdb.db;\r
   2 \r
   3 import javax.jdo.PersistenceManager;\r
   4 \r
   5 public class KeyValueDao {\r
   6         private static KeyValueDao instance = null;\r
   7         \r
   8         public static KeyValueDao getInstance(){\r
   9                 if (instance == null){\r
  10                         instance = new KeyValueDao();\r
  11                 }\r
  12                 return instance;\r
  13         }\r
  14         \r
  15         private PersistenceManager pm = PMFactory.get().getPersistenceManager();\r
  16         \r
  17         private KeyValueDao(){\r
  18                 \r
  19         }\r
  20         \r
  21         public String get(String key){\r
  22                 KeyValue keyValue = pm.getObjectById(KeyValue.class, key);\r
  23                 if (keyValue == null){\r
  24                         return null;\r
  25                 }\r
  26                 return keyValue.getValue();\r
  27         }\r
  28         \r
  29         public void put(String key, String value){\r
  30                 KeyValue keyValue = new KeyValue(key, value);\r
  31                 pm.makePersistent(keyValue);\r
  32         }\r
  33 }\r