1 /*
2 * The contents of this file are subject to the BT "ZEUS" Open Source
3 * Licence (L77741), Version 1.0 (the "Licence"); you may not use this file
4 * except in compliance with the Licence. You may obtain a copy of the Licence
5 * from $ZEUS_INSTALL/licence.html or alternatively from
6 * http://www.labs.bt.com/projects/agents/zeus/licence.htm
7 *
8 * Except as stated in Clause 7 of the Licence, software distributed under the
9 * Licence is distributed WITHOUT WARRANTY OF ANY KIND, either express or
10 * implied. See the Licence for the specific language governing rights and
11 * limitations under the Licence.
12 *
13 * The Original Code is within the package zeus.*.
14 * The Initial Developer of the Original Code is British Telecommunications
15 * public limited company, whose registered office is at 81 Newgate Street,
16 * London, EC1A 7AJ, England. Portions created by British Telecommunications
17 * public limited company are Copyright 1996-9. All Rights Reserved.
18 *
19 * THIS NOTICE MUST BE INCLUDED ON ANY COPY OF THIS FILE
20 */
21 package zeus.actors.factories;
22 import zeus.actors.OutTray;
23 import zeus.util.SystemProps;
24
25 public class ConnectionPool {
26
27 public int MAX_CONNECTIONS = Integer.parseInt(SystemProps.getProperty("num.connections"));
28 private OutTray[] connections = new OutTray[MAX_CONNECTIONS];
29 private String[] keys = new String [MAX_CONNECTIONS];
30 private int write = 0;
31
32
33 /***
34 get a connection from the connection pool. Throw an exception if it is
35 not present
36 */
37 public OutTray getConnection (String address) throws NotFoundException {
38 for (int i = 0; i < MAX_CONNECTIONS ; i++) {
39
40 if (keys[i]== null) { ;}
41 else {
42 // System.out.println("keys[i] == " + keys[i] + " address == " + address);
43 if (keys[i].equals(address)) {
44 return (connections[i]);
45 }
46 }
47 //System.out.println(i);
48 }
49 throw new NotFoundException();
50
51 }
52
53
54 /***
55 store a connection in the pool. If more than MAX_CONNECTIONS then eliminate the
56 oldest - doesn't check to see if connection is in here!*/
57 public void addConnection (String address, OutTray connection) {
58 if (write >= MAX_CONNECTIONS){
59 write = 0;
60 }
61 // System.out.println("setting address = " + address);
62 connections[write] = connection;
63 keys[write] = address;
64 write ++;
65 }
66
67
68 }