/**
* Commit or roll back the given transaction.
*
* @param transactionName the name of the transaction
* @param commit true for commit, false for rollback
*/
public void setPreparedTransaction(String transactionName, boolean commit) {
if (currentTransactionName != null && currentTransactionName.equals(transactionName)) {
if (commit) {
commit(false);
} else {
rollback();
}
} else {
ArrayList<InDoubtTransaction> list = database.getInDoubtTransactions();
int state = commit ? InDoubtTransaction.COMMIT : InDoubtTransaction.ROLLBACK;
boolean found = false;
if (list != null) {
for (InDoubtTransaction p : list) {
if (p.getTransactionName().equals(transactionName)) {
p.setState(state);
found = true;
break;
}
}
}
if (!found) {
throw DbException.get(ErrorCode.TRANSACTION_NOT_FOUND_1, transactionName);
}
}
}
/**
* Flush the current value, including the margin, to disk.
*
* @param session the session
*/
public synchronized void flush(Session session) {
if (session == null || !database.isSysTableLocked()) {
// This session may not lock the sys table (except if it already has locked it)
// because it must be committed immediately,
// otherwise other threads can not access the sys table.
Session sysSession = database.getSystemSession();
synchronized (sysSession) {
flushInternal(sysSession);
sysSession.commit(false);
}
} else {
synchronized (session) {
flushInternal(session);
}
}
}
private void dropTable() {
if (table == null) {
return;
}
if (containsLob) {
// contains BLOB or CLOB: can not truncate now,
// otherwise the BLOB and CLOB entries are removed
return;
}
try {
Database database = session.getDatabase();
// Need to lock because not all of the code-paths
// that reach here have already taken this lock,
// notably via the close() paths.
synchronized (session) {
synchronized (database) {
table.truncate(session);
}
}
// This session may not lock the sys table (except if it already has
// locked it) because it must be committed immediately, otherwise
// other threads can not access the sys table. If the table is not
// removed now, it will be when the database is opened the next
// time. (the table is truncated, so this is just one record)
if (!database.isSysTableLocked()) {
Session sysSession = database.getSystemSession();
table.removeChildrenAndResources(sysSession);
if (index != null) {
// need to explicitly do this,
// as it's not registered in the system session
session.removeLocalTempTableIndex(index);
}
// the transaction must be committed immediately
// TODO this synchronization cascade is very ugly
synchronized (session) {
synchronized (sysSession) {
synchronized (database) {
sysSession.commit(false);
}
}
}
}
} finally {
table = null;
}
}