ConnectionWaiter


1   /*
2    * Created on 2004. 6. 24.
3    */
4   package chipchat;
5   
6   import java.util.HashMap  ;
7   
8   /**
9    * @author MTY.
10   */
11  public class ConnectionWaiter extends Thread   {
12  
13      /*
14       * Sigleton..
15       */
16  
17      /** Instance */
18      private static ConnectionWaiter instance = null;
19  
20      /** Constructor */
21      private ConnectionWaiter() {
22      }
23  
24      /** Getter of instance. */
25      public static ConnectionWaiter getInstance() {
26          if (instance == null) {
27              makeInstance();
28          }
29          return instance;
30      }
31  
32      /**
33       * Make just one instance.
34       */
35      private static synchronized void makeInstance() {
36          if (instance == null) {
37              instance = new ConnectionWaiter();
38          }
39      }
40  
41      /** Lock object */
42      private Object   lock = new Object  ();
43      /** Part1 */
44      private HashMap   part1 = new HashMap  ();
45      /** Part2 */
46      private HashMap   part2 = new HashMap  ();
47  
48      /**
49       * Run method.
50       */
51      public void run() {
52          while (true) {
53              try {
54                  Thread.sleep(30000);
55              } catch (InterruptedException   e) {
56                  e.printStackTrace();
57              }
58              synchronized (lock) {
59                  part2 = part1;
60                  part1.clear();
61              }
62          }
63      }
64  
65      /**
66       * Put value
67       * @param name Name
68       * @param o value
69       */
70      public void put(String   name, ConnectionInfo o) {
71          synchronized (lock) {
72              part1.put(name, o);
73          }
74      }
75  
76      /**
77       * Get value
78       * @param name Name
79       * @return value
80       */
81      public ConnectionInfo get(String   name) {
82          synchronized (lock) {
83              Object   o = part1.get(name);
84              if (o != null) {
85                  part1.remove(name);
86                  return (ConnectionInfo) o;
87              } else {
88                  o = part2.get(name);
89                  if (o != null) {
90                      part2.remove(name);
91                      return (ConnectionInfo) o;
92                  } else {
93                      return null;
94                  }
95              }
96          }
97      }
98  }
99
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