public DataFileCache(Database db, String fileName, String backupName) throws HsqlException {
this.fileName = fileName;
this.backupFileName = backupName;
database = db;
fa = database.getFileAccess();
initParams();
cache = new Cache(this);
}
/** Writes out all the rows to a new file without fragmentation. */
public void defrag() throws HsqlException {
if (cacheReadonly) {
return;
}
if (fileFreePosition == INITIAL_FREE_POS) {
return;
}
try {
boolean wasNio = dataFile.wasNio();
DataFileDefrag dfd = new DataFileDefrag(database, this, fileName);
dfd.process();
close(false);
Trace.printSystemOut("closed old cache");
// first attemp to delete
fa.removeElement(fileName);
if (wasNio) {
System.gc();
if (fa.isStreamElement(fileName)) {
fa.removeElement(fileName);
if (fa.isStreamElement(fileName)) {
fa.renameElement(fileName, fileName + ".old");
File oldfile = new File(fileName + ".old");
FileUtil.deleteOnExit(oldfile);
}
}
}
// [email protected] - change to file access api
fa.renameElement(fileName + ".new", fileName);
backup();
database
.getProperties()
.setProperty("hsqldb.cache_version", HsqlDatabaseProperties.VERSION_STRING_1_7_0);
database.getProperties().save();
initParams();
cache = new Cache(this);
open(cacheReadonly);
dfd.updateTableIndexRoots();
Trace.printSystemOut("opened cache");
} catch (Exception e) {
database.logger.appLog.logContext(e);
throw new HsqlException(e, Trace.getMessage(Trace.GENERAL_IO_ERROR), Trace.GENERAL_IO_ERROR);
/*
Trace.error(Trace.FILE_IO_ERROR, Trace.DataFileCache_defrag, new Object[] {
e, fileName
});
*/
}
}
public DataFileCache(Database db, String baseFileName) throws HsqlException {
initParams(db, baseFileName);
cache = new Cache(this);
}