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/*******************************************************************************
* Copyright (c) 2004-2008 Gabor Bergmann and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.rete.index;
import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
import tools.refinery.viatra.runtime.matchers.util.Direction;
import tools.refinery.viatra.runtime.rete.network.Node;
import tools.refinery.viatra.runtime.rete.network.communication.Timestamp;
/**
* A listener for update events concerning an Indexer.
*
* @author Gabor Bergmann
*
*/
public interface IndexerListener {
/**
* Notifies recipient that the indexer has just received an update. Contract: indexer already reflects the updated
* state.
*
* @param direction
* the direction of the update.
* @param updateElement
* the tuple that was updated.
* @param signature
* the signature of the tuple according to the indexer's mask.
* @param change
* whether this was the first inserted / last revoked update element with this particular signature.
* @since 2.4
*/
void notifyIndexerUpdate(Direction direction, Tuple updateElement, Tuple signature, boolean change, Timestamp timestamp);
Node getOwner();
}
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