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Java > Open Source Codes > org > mr > core > persistent > PersistentManager


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
4  * <a HREF="mailto: support@coridan.com ">support@coridan.com</a>
5  *
6  * The contents of this file are subject to the Mozilla Public License Version
7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
18  * The Initial Developer of the Original Code is Amir Shevat.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
21  *
22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
24  *
25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
27  * provisions of LGPL are applicable instead of those above. If you wish to
28  * allow use of your version of this file only under the terms of the LGPL
29  * License and not to allow others to use your version of this file under
30  * the MPL, indicate your decision by deleting the provisions above and
31  * replace them with the notice and other provisions required by the LGPL.
32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
44  * License for more details.
45  */
46 package org.mr.core.persistent;
47
48 import java.io.IOException JavaDoc;
49 import java.nio.ByteBuffer JavaDoc;
50
51 import org.mr.core.util.byteable.Byteable;
52
53 /**
54  * to decuple the implementation of the persistency (DB, FILE) with the logic of it
55  * this interface has all the logical operations
56  *
57  * @author Amir Shevat
58  *
59  */
60 public interface PersistentManager {
61     public final static String JavaDoc SUBSCRIBERS_PERSISTENT_PREFIX = "subscribers_";
62     int MAX_FILES_PER_STORAGE = 1000000;
63
64     public void recover();
65     /**
66      * @return
67      */
68     int[] getKeys();
69
70     /**
71      * @param i
72      * @return
73      */
74     Object JavaDoc getPersistentObject(int i);
75
76
77     /**
78      * @param i
79      */
80     void deletePersistentObject(int i);
81
82     /**
83      * @param entryName
84      * @param entry
85      */
86     void savePersistentObject(int entryName, Byteable entry) throws IOException JavaDoc;
87
88
89     /**
90      *
91      */
92     void clearStorage() throws IOException JavaDoc;
93
94     /**
95      * @param fileName
96      * @param byteBuffer
97      */
98     void savePersistentBuffer(int fileName, ByteBuffer JavaDoc byteBuffer) throws IOException JavaDoc;
99
100     /**
101      * @param i
102      * @return
103      */
104     ByteBuffer JavaDoc getPersistentBuffer(int i);
105     /**
106      * @return
107      */
108     public String JavaDoc getStorageName();
109
110
111     String JavaDoc[] getAllServices();
112 }
113
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