org.opentripplanner.updater.GraphWriterRunnable Maven / Gradle / Ivy

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package org.opentripplanner.updater;

import org.opentripplanner.routing.graph.Graph;
import org.opentripplanner.transit.service.TransitModel;

/**
 * The graph should only be modified by a runnable implementing this interface, executed by the
 * GraphUpdaterManager. A few notes: - Don't spend more time in this runnable than necessary, it
 * might block other graph writer runnables. - Be aware that while only one graph writer runnable is
 * running to write to the graph, several request-threads might be reading the graph. - Be sure that
 * the request-threads always see a consistent view of the graph while planning.
 *
 * @see GraphUpdaterManager
 */
public interface GraphWriterRunnable {
  /**
   * This function is executed to modify the graph.
   */
  void run(Graph graph, TransitModel transitModel);
}