UniqueValueGeneratorBackend


1   /*
2    * The contents of this file are subject to the terms 
3    * of the Common Development and Distribution License 
4    * (the License).  You may not use this file except in
5    * compliance with the License.
6    * 
7    * You can obtain a copy of the license at 
8    * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9    * glassfish/bootstrap/legal/CDDLv1.0.txt.
10   * See the License for the specific language governing 
11   * permissions and limitations under the License.
12   * 
13   * When distributing Covered Code, include this CDDL 
14   * Header Notice in each file and include the License file 
15   * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
16   * If applicable, add the following below the CDDL Header, 
17   * with the fields enclosed by brackets [] replaced by
18   * you own identifying information: 
19   * "Portions Copyrighted [year] [name of copyright owner]"
20   * 
21   * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22   */
23  package com.sun.enterprise.util;
24  
25  import java.rmi.Remote  ;
26  import java.rmi.RemoteException  ;
27  
28  /**
29   * Interface for server-side implementation of unique value
30   * generator.  NOTE : This is not intended to be used by clients
31   * that need unique numbers.  It is only used internally
32   * by concrete UniqueValueGenerator implementations.  Clients should
33   * use UniqueValueGeneratorFactory and UniqueValueGenerator instead.
34   *
35   * @author Kenneth Saks
36   */
37  public interface UniqueValueGeneratorBackend extends Remote   {
38  
39      // Name under which server side object is registered
40      String   JNDI_NAME = "J2EE_UNIQUE_VALUE_GEN";
41  
42      /**
43       * Id generated by backend upon startup that will be unique
44       * for each successive invocation of the same j2ee server instance.
45       */
46      String   getGeneratorId() throws RemoteException  ;
47      
48      /**
49       * Get another block of unique numbers for a particular context.
50       */
51      UniqueValueBlock getNextValueBlock(String   context) throws RemoteException  ;
52  
53  
54  }
55
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