/**
* Method declaration
*
*
* @throws Exception
*/
public void checkpoint()
{
close(false);
sModified = "yes";
saveProperties();
cCache.open(false);
openScript();
}
/**
* Method declaration
*
*
* @return
*
* @throws Exception
*/
public bool open()
{
bool newdata = false;
if (Trace.TRACE)
{
Trace.trace();
}
if (!(new File(sFileProperties)).Exists)
{
create();
// this is a new database
newdata = true;
}
// todo: some parts are not necessary for read-only access
loadProperties();
if (bReadOnly == true)
{
dDatabase.setReadOnly();
cCache = new Cache(sFileCache);
cCache.open(true);
runScript();
return(false);
}
bool needbackup = false;
if (sModified.Equals("yes-new-files"))
{
renameNewToCurrent(sFileScript);
renameNewToCurrent(sFileBackup);
}
else if (sModified.Equals("yes"))
{
if (isAlreadyOpen())
{
throw Trace.error(Trace.DATABASE_ALREADY_IN_USE);
}
// recovering after a crash (or forgot to close correctly)
restoreBackup();
needbackup = true;
}
sModified = "yes";
saveProperties();
cCache = new Cache(sFileCache);
cCache.open(false);
runScript();
if (needbackup)
{
close(false);
sModified = "yes";
saveProperties();
cCache.open(false);
}
openScript();
// this is a existing database
return(newdata);
}
/**
* Method declaration
*
*
* @return
*
* @throws Exception
*/
public bool open()
{
bool newdata = false;
if (Trace.TRACE)
{
Trace.trace();
}
if (!(new File(sFileProperties)).Exists)
{
create();
// this is a new database
newdata = true;
}
// todo: some parts are not necessary for read-only access
loadProperties();
if (bReadOnly == true)
{
dDatabase.setReadOnly();
cCache = new Cache(sFileCache);
cCache.open(true);
runScript();
return false;
}
bool needbackup = false;
if (sModified.Equals("yes-new-files"))
{
renameNewToCurrent(sFileScript);
renameNewToCurrent(sFileBackup);
}
else if (sModified.Equals("yes"))
{
if (isAlreadyOpen())
{
throw Trace.error(Trace.DATABASE_ALREADY_IN_USE);
}
// recovering after a crash (or forgot to close correctly)
restoreBackup();
needbackup = true;
}
sModified = "yes";
saveProperties();
cCache = new Cache(sFileCache);
cCache.open(false);
runScript();
if (needbackup)
{
close(false);
sModified = "yes";
saveProperties();
cCache.open(false);
}
openScript();
// this is a existing database
return newdata;
}