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jeremybenn |
/* PersistentBidiHasthable.java -- Constants for the persistent tables.
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.tools.common;
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import java.util.Timer;
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import java.util.TimerTask;
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/**
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* The static fields, shared by the multiple classes, implementing the
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* persistent work.
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*
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* @author Audrius Meskauskas (audriusa@bioinformatics.org)
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*/
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public interface Persistent
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{
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/**
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* Sheduled termination task.
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*/
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static class ExitTask extends TimerTask
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{
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public void run()
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{
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System.exit(0);
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}
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}
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/**
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* The timer, sheduling all disk database update events, shared by all
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* instances.
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*/
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static Timer timer = new Timer(true);
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/**
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* The longest time, in ms, after that the database content on the disk must
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* be updated. The algorithm is written to avoid the very frequent writings to
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* the disk.
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*/
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static long SAVE_AT_MOST_AFTER = 5000;
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/**
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* States how long the database may stay not updated during the intensive
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* operations, in ms. Otherwise the intensively used structure may never
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* be stored to the disk.
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*/
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static long ALWAYS_UPDATE = 300000;
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/**
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* Write the database content to the disk.
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*/
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void writeContent();
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}
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