ActiveDatabaseMBean


1   /*
2    * HA-JDBC: High-Availability JDBC
3    * Copyright (c) 2004-2006 Paul Ferraro
4    * 
5    * This library is free software; you can redistribute it and/or modify it 
6    * under the terms of the GNU Lesser General Public License as published by the 
7    * Free Software Foundation; either version 2.1 of the License, or (at your 
8    * option) any later version.
9    * 
10   * This library is distributed in the hope that it will be useful, but WITHOUT
11   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
12   * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 
13   * for more details.
14   * 
15   * You should have received a copy of the GNU Lesser General Public License
16   * along with this library; if not, write to the Free Software Foundation, 
17   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18   * 
19   * Contact: ferraro@users.sourceforge.net
20   */
21  package net.sf.hajdbc;
22  
23  import java.util.Properties  ;
24  
25  /**
26   * @author Paul Ferraro
27   *
28   */
29  public interface ActiveDatabaseMBean
30  {
31      /**
32       * Returns the unique idenfier for this database
33       * @return a unique identifier
34       */
35      public String   getId();
36      
37      /**
38       * Returns the relative "weight" of this cluster node.
39       * In general, when choosing a node to service read requests, a cluster will favor the node with the highest weight.
40       * A weight of 0 is somewhat special, depending on the type of balancer used by the cluster.
41       * In most cases, a weight of 0 means that this node will never service read requests unless it is the only node in the cluster.
42       * @return a positive integer
43       */
44      public int getWeight();
45      
46      /**
47       * @return the database user
48       */
49      public String   getUser();
50      
51      /**
52       * @return the password of the database user
53       */
54      public String   getPassword();
55      
56      /**
57       * Returns a collection of additional properties of this database.
58       * @return additional properties of this database
59       */
60      public Properties   getProperties();
61  }
62
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