private TempTable getTempTable(
String tempTableID,
Command command,
BufferManager buffer,
boolean delegate,
boolean forUpdate,
CommandContext context)
throws TeiidProcessingException {
final TempTable tempTable = tempTables.get(tempTableID);
if (tempTable != null) {
// isolate if needed
if (forUpdate) {
if (transactionMode == TransactionMode.ISOLATE_WRITES) {
TransactionContext tc = context.getTransactionContext();
if (tc != null) {
TempTableSynchronization synch = getSynchronization(context);
if (synch != null && synch.existingTables.contains(tempTable.getId())) {
TempTable result = synch.tables.get(tempTableID);
if (result == null) {
synchronized (synch) {
if (synch.isCompleted()) {
throw new AssertionError("Expected active transaction"); // $NON-NLS-1$
}
if (!tempTable.getActive().compareAndSet(0, 1)) {
throw new TeiidProcessingException(
QueryPlugin.Event.TEIID30227,
QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30227, tempTableID));
}
synch.tables.put(tempTableID, tempTable.clone());
}
}
return tempTable;
}
} else if (tempTable.getActive().get() != 0) {
throw new TeiidProcessingException(
QueryPlugin.Event.TEIID30227,
QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30227, tempTableID));
}
}
} else if (transactionMode == TransactionMode.ISOLATE_READS) {
TransactionContext tc = context.getTransactionContext();
if (tc != null && tc.getIsolationLevel() > Connection.TRANSACTION_READ_COMMITTED) {
TempTableSynchronization synch = getSynchronization(context);
if (synch != null) {
TempTable result = synch.tables.get(tempTableID);
if (result == null) {
result = tempTable;
synchronized (synch) {
if (!synch.isCompleted()) {
synch.tables.put(tempTableID, tempTable);
result.getActive().getAndIncrement();
}
}
}
return result;
}
}
}
return tempTable;
}
if (delegate && this.parentTempTableStore != null) {
return this.parentTempTableStore.getTempTable(
tempTableID, command, buffer, delegate, forUpdate, context);
}
return null;
}
