Mercurial > hg > blitz_stable
diff src/org/prevayler/implementation/SnapshotPrevayler.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/org/prevayler/implementation/SnapshotPrevayler.java Sat Mar 21 11:00:06 2009 +0000 @@ -0,0 +1,64 @@ +/* + The copyright of all source code included in this Prevayler distribution is + held by Klaus Wuestefeld, except the files that specifically state otherwise. + All rights are reserved. "PREVAYLER" is a trademark of Klaus Wuestefeld. + + + BSD License: + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + - Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + + - Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + - Neither the name of Prevayler nor the names of its contributors may be used + to endorse or promote products derived from this software without specific + prior written permission. + + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. +*/ + +package org.prevayler.implementation; + +import java.util.Date; +import java.io.*; + +import org.prevayler.*; + +/** Provides transparent persistence for business objects. +* This applies to any deterministic system implementing the PrevalentSystem interface. +* All commands to the system must be represented as objects implementing the Command interface and must be executed using Prevayler.executeCommand(Command). +* Take a look at the demo application included with the Prevayler distribution for examples. +* @see PrevaylerFactory +*/ +public interface SnapshotPrevayler extends Prevayler { + /** + * This method prepares a snapshot of the system and returns it in a + * Snapshotter instance which can be used to save the snapshot to disk + * once dirty state has been sync'd to disk. If your application has no + * additional state, you can simply invoke on the Snapshotter immediately. + * @return Snapshotter to be used to save an appropriate snapshot post + * sync'ing of dirty state to disk. + * @see system() + * @throws IOException if there is trouble preparing the snapshot file. + */ + public Snapshotter takeSnapshot() throws IOException; +} + +