Source Code Cross Referenced for PersistenceSession.java in  » Development » ivatamasks » com » ivata » mask » persistence » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » ivatamasks » com.ivata.mask.persistence 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 2001 - 2005 ivata limited.
003:         * All rights reserved.
004:         * -----------------------------------------------------------------------------
005:         * ivata masks may be redistributed under the GNU General Public
006:         * License as published by the Free Software Foundation;
007:         * version 2 of the License.
008:         *
009:         * These programs are free software; you can redistribute them and/or
010:         * modify them under the terms of the GNU General Public License
011:         * as published by the Free Software Foundation; version 2 of the License.
012:         *
013:         * These programs are distributed in the hope that they will be useful,
014:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
015:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016:         *
017:         * See the GNU General Public License in the file LICENSE.txt for more
018:         * details.
019:         *
020:         * If you would like a copy of the GNU General Public License write to
021:         *
022:         * Free Software Foundation, Inc.
023:         * 59 Temple Place - Suite 330
024:         * Boston, MA 02111-1307, USA.
025:         *
026:         *
027:         * To arrange commercial support and licensing, contact ivata at
028:         *                  http://www.ivata.com/contact.jsp
029:         * -----------------------------------------------------------------------------
030:         * $Log: PersistenceSession.java,v $
031:         * Revision 1.5  2005/04/09 18:04:15  colinmacleod
032:         * Changed copyright text to GPL v2 explicitly.
033:         *
034:         * Revision 1.4  2005/03/10 10:32:21  colinmacleod
035:         * Added cancel method.
036:         *
037:         * Revision 1.3  2005/01/19 12:38:34  colinmacleod
038:         * Renamed CausedByException to SystemException.
039:         *
040:         * Revision 1.2  2005/01/06 22:13:22  colinmacleod
041:         * Moved up a version number.
042:         * Changed copyright notices to 2005.
043:         * Updated the documentation:
044:         *   - started working on multiproject:site docu.
045:         *   - changed the logo.
046:         * Added checkstyle and fixed LOADS of style issues.
047:         * Added separate thirdparty subproject.
048:         * Added struts (in web), util and webgui (in webtheme) from ivata op.
049:         *
050:         * Revision 1.1  2004/12/29 20:07:08  colinmacleod
051:         * Renamed subproject masks to mask.
052:         *
053:         * Revision 1.1  2004/11/12 15:10:41  colinmacleod
054:         * Moved persistence classes from ivata op as a replacement for
055:         * ValueObjectLocator.
056:         *
057:         * Revision 1.1  2004/07/13 19:42:44  colinmacleod
058:         * Moved project to POJOs from EJBs.
059:         * Applied PicoContainer to services layer (replacing session EJBs).
060:         * Applied Hibernate to persistence layer (replacing entity EJBs).
061:         * -----------------------------------------------------------------------------
062:         */
063:        package com.ivata.mask.persistence;
064:
065:        import java.io.Serializable;
066:        import java.sql.Connection;
067:
068:        /**
069:         * A persistence session must be opened (by calling {@link
070:         * PersistenceManager#openSession PersistenceManager.openSession} before
071:         * performing any other persistence operation. It can be considered analagous to
072:         * a transaction in a database environment.
073:         *
074:         * @author Colin MacLeod
075:         * <a href='mailto:colin.macleod@ivata.com'>colin.macleod@ivata.com</a>
076:         * @since ivata masks 0.3 (2004-03-27)
077:         * @version $Revision: 1.5 $
078:         * @see PersistenceManager
079:         */
080:        public interface PersistenceSession extends Serializable {
081:            /**
082:             * <p>
083:             * Cancel all operations performed in this session. These operations should
084:             * then be rolled back in <code>close</code>
085:             * </p>
086:             * @throws PersistenceException
087:             *             if the session cannot be cancelled for any reason.
088:             */
089:            void cancel() throws PersistenceException;
090:
091:            /**
092:             * <p>
093:             * Commit any changes made in this transaction to the data store. You must
094:             * call this method after performing persistence methods - use it within a
095:             * <code>finally</code> block as shown in the example code.
096:             * </p>
097:             * <p>
098:             * TODO: link to demo code reference here.
099:             * </p>
100:             *
101:             * @throws PersistenceException
102:             *             if the session cannot be closed/committed for any reason.
103:             */
104:            void close() throws PersistenceException;
105:
106:            /**
107:             * <p>
108:             * Access the data connection wrapped by this persistence session. You
109:             * should think twice before using this method - not all implementations of
110:             * a persistence layer may use a database, and therefore this may not always
111:             * be appropriate.
112:             * </p>
113:             *
114:             * @return valid database connection for the underlying data store.
115:             * @throws PersistenceException
116:             *             if the database connection cannot be retrieved for any reason
117:             *             (including lack of support by the underlying persistence
118:             *             layer).
119:             */
120:            Connection getConnection() throws PersistenceException;
121:
122:            /**
123:             * Return a system-specific (i.e. <strong>ivata masks</strong> knows nothing
124:             * about it's specific implementation) session object - this is stored when
125:             * <code>PersistenceManager.openSession</code> is called with an object
126:             * parameter.
127:             *
128:             * @return system-specific session object, or <code>null</code> if none was
129:             * set.
130:             */
131:            Object getSystemSession();
132:        }
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