/**
* DataCleaner (community edition)
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.datacleaner.job.concurrent;
import org.datacleaner.api.OutputRowCollector;
import org.datacleaner.job.AbstractOutputRowCollector;
/**
* Thread local implementation of the {@link OutputRowCollector} interface.
*
* This implementation holds a listener which recieves the values that are put
* to the collector. Consumers should register a listener and remove it after
* invocation.
*/
public class ThreadLocalOutputRowCollector extends AbstractOutputRowCollector {
/**
* Listener interface to be implemented by users of the output row
* collector.
*/
public interface Listener {
void onValues(Object[] values);
}
private final ThreadLocal<Listener> _listener;
public ThreadLocalOutputRowCollector() {
_listener = new ThreadLocal<>();
}
public void setListener(final Listener listener) {
_listener.set(listener);
}
public void removeListener() {
_listener.remove();
}
@Override
public void putValues(final Object... values) {
final Listener listener = _listener.get();
if (listener == null) {
throw new IllegalStateException("No thread local listener registered!");
}
listener.onValues(values);
}
}