/**
* @deprecated It has not been possible to implement this method with correct transactional
* semantics without incurring a performance penalty on all Database operations. Truncate
* functionality has been moved to Environment.truncateDatabase(), which requires that all
* Database handles on the database are closed before the truncate operation can execute.
*/
public int truncate(Transaction txn, boolean countRecords) throws DatabaseException {
checkEnv();
checkRequiredDbState(OPEN, "Can't call Database.truncate");
checkWritable("truncate");
Tracer.trace(
Level.FINEST,
envHandle.getEnvironmentImpl(),
"Database.truncate" + ": txnId=" + ((txn == null) ? "null" : Long.toString(txn.getId())));
Locker locker = null;
boolean triggerLock = false;
boolean operationOk = false;
try {
locker =
LockerFactory.getWritableLocker(
envHandle, txn, isTransactional(), true /*retainLocks*/, null);
/*
* Pass true to always get a read lock on the triggers, so we are
* sure that no secondaries are added during truncation.
*/
acquireTriggerListReadLock();
triggerLock = true;
/* Truncate primary. */
int count = truncateInternal(locker, countRecords);
/* Truncate secondaries. */
for (int i = 0; i < triggerList.size(); i += 1) {
Object obj = triggerList.get(i);
if (obj instanceof SecondaryTrigger) {
SecondaryDatabase secDb = ((SecondaryTrigger) obj).getDb();
secDb.truncateInternal(locker, false);
}
}
operationOk = true;
return count;
} finally {
if (locker != null) {
locker.operationEnd(operationOk);
}
if (triggerLock) {
releaseTriggerListReadLock();
}
}
}
public BDBCreator(String tableName, ArrayList<Integer> keyPositions, int secondaryIndex) {
/* Creates and loads a BDB table with a secondary index on the column defined by*/
this.tableName = tableName.toLowerCase();
this.keyPositions = keyPositions;
this.secIndexPos = secondaryIndex;
this.tMap = Main.indexTypeMaps.get(this.tableName);
setEnvironment();
dbConfig = new DatabaseConfig();
dbConfig.setAllowCreate(true);
myDB = myDbEnvironment.openDatabase(null, this.tableName, dbConfig);
SecondaryConfig secConfig = new SecondaryConfig();
secConfig.setAllowCreate(true);
secConfig.setSortedDuplicates(true);
createSecDB(secConfig);
setConfig(dbConfig, secConfig);
loadData();
if (secDB != null) {
secDB.close();
}
if (myDB != null) {
myDB.close();
}
closeEnvironment();
}
public void databaseUpdated(
Database db,
Locker locker,
DatabaseEntry priKey,
DatabaseEntry oldData,
DatabaseEntry newData)
throws DatabaseException {
if (newData == null) {
secDb.onForeignKeyDelete(locker, priKey);
}
}
public void triggerRemoved(Database db) {
secDb.clearForeignKeyTrigger();
}