/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* 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
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.operator;
import com.rapidminer.operator.ports.DummyPortPairExtender;
import com.rapidminer.operator.ports.PortPairExtender;
import com.rapidminer.operator.preprocessing.MaterializeDataInMemory;
/**
* Cleans up unused memory resources. Might be very useful in combination with the
* {@link MaterializeDataInMemory} operator after large preprocessing trees using lot of views or
* data copies. Internally, this operator simply invokes a garbage collection from the underlying
* Java programming language.
*
* @author Ingo Mierswa
*/
public class MemoryCleanUp extends Operator {
private PortPairExtender dummyPorts = new DummyPortPairExtender("through", getInputPorts(), getOutputPorts());
public MemoryCleanUp(OperatorDescription description) {
super(description);
dummyPorts.start();
getTransformer().addRule(dummyPorts.makePassThroughRule());
}
@Override
public void doWork() throws OperatorException {
System.gc();
dummyPorts.passDataThrough();
}
}