void lockTablesTPL(Session session, Statement cs) {
if (cs == null || session.abortTransaction) {
return;
}
HsqlName[] nameList = cs.getTableNamesForWrite();
for (int i = 0; i < nameList.length; i++) {
HsqlName name = nameList[i];
if (name.schema == SqlInvariants.SYSTEM_SCHEMA_HSQLNAME) {
continue;
}
tableWriteLocks.put(name, session);
}
nameList = cs.getTableNamesForRead();
for (int i = 0; i < nameList.length; i++) {
HsqlName name = nameList[i];
if (name.schema == SqlInvariants.SYSTEM_SCHEMA_HSQLNAME) {
continue;
}
tableReadLocks.put(name, session);
}
}
void unlockTablesTPL(Session session) {
Iterator it = tableWriteLocks.values().iterator();
while (it.hasNext()) {
Session s = (Session) it.next();
if (s == session) {
it.setValue(null);
}
}
it = tableReadLocks.values().iterator();
while (it.hasNext()) {
Session s = (Session) it.next();
if (s == session) {
it.remove();
}
}
}
boolean setWaitedSessionsTPL(Session session, Statement cs) {
session.tempSet.clear();
if (cs == null || session.abortTransaction) {
return true;
}
HsqlName[] nameList = cs.getTableNamesForWrite();
for (int i = 0; i < nameList.length; i++) {
HsqlName name = nameList[i];
if (name.schema == SqlInvariants.SYSTEM_SCHEMA_HSQLNAME) {
continue;
}
Session holder = (Session) tableWriteLocks.get(name);
if (holder != null && holder != session) {
session.tempSet.add(holder);
}
Iterator it = tableReadLocks.get(name);
while (it.hasNext()) {
holder = (Session) it.next();
if (holder != session) {
session.tempSet.add(holder);
}
}
}
nameList = cs.getTableNamesForRead();
if (session.isReadOnly()) {
nameList = catalogNameList;
}
for (int i = 0; i < nameList.length; i++) {
HsqlName name = nameList[i];
if (name.schema == SqlInvariants.SYSTEM_SCHEMA_HSQLNAME) {
continue;
}
Session holder = (Session) tableWriteLocks.get(name);
if (holder != null && holder != session) {
session.tempSet.add(holder);
}
}
for (int i = 0; i < session.waitingSessions.size(); i++) {
Session current = (Session) session.waitingSessions.get(i);
if (session.tempSet.contains(current)) {
session.tempSet.clear();
return false;
}
}
return true;
}
