/**
* The run method for the thread that retrieves the data from the database. This method should not
* be called directly. Instead use the retrieve method.
*/
public void run() {
try {
DataStoreRow row = new DataStoreRow(this, new DSDataRow(_desc), _desc);
while (_dataSource.retrieveRow(this, row)) {
_rows.addElement(row.getDSDataRow());
if (_threaded) notifyListeners(ModelChangedEvent.TYPE_ROW_INSERTED_OR_DELETED);
if (!_retrieveInProgress || (_maxRows > -1 && _rows.size() >= _maxRows)) {
_cancelInProgress = true;
_retrieveInProgress = false;
interruptWaitingRetrieveThreads();
break;
}
if (_threaded) Thread.yield();
row.setDSDataRow(new DSDataRow(_desc));
}
_dataSource.postRetrieve(this);
_cancelInProgress = false;
interruptWaitingCancelThreads();
notifyListeners(ModelChangedEvent.TYPE_DATA_LOADED);
} catch (Exception e) {
System.out.println("DataStore.run:" + e);
_cancelInProgress = false;
interruptWaitingCancelThreads();
}
_retrieveInProgress = false;
interruptWaitingRetrieveThreads();
_cancelInProgress = false;
interruptWaitingCancelThreads();
}
private synchronized void retrieve(String criteria, boolean countOnly) throws DataStoreException {
if (!countOnly) reset();
waitForCancel(); // just in case there was already a retrieve running wait for it to be
// cancelled before continuing
_retrieveInProgress = true;
try {
_dataSource.preRetrieve(this, criteria, countOnly);
} catch (Exception e) {
try {
_dataSource.postRetrieve(this);
} catch (java.sql.SQLException ex) {
throw new DataStoreException(ex.toString(), ex);
} catch (Exception ex) {
throw new DataStoreException(ex.toString());
}
_retrieveInProgress = false;
interruptWaitingRetrieveThreads();
throw new DataStoreException(e.toString(), e);
}
if (!countOnly) {
if (_threaded) {
Thread t = new Thread(this);
t.start();
} else run();
}
}