EDIT

package eu.etaxonomy.taxeditor.editor.validation;

import java.util.List;

import org.apache.log4j.Logger;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.core.runtime.jobs.Job;

import eu.etaxonomy.cdm.api.service.IEntityValidationService;

import eu.etaxonomy.cdm.model.validation.EntityValidation;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * A job that repeatedly checks the error tables and refreshes the problem

 * markers created from them.

 *

 * @author ayco_holleman

 *

 */

public class ValidationDaemon extends Job {

	@SuppressWarnings("unused")

	private static final Logger logger = Logger.getLogger(ValidationDaemon.class);

	private final IEntityValidationService entityValidationService;

	// Might want to make this configurable:

	private int SLEEP_TIME = 5000;

	private boolean cancelRequested = false;

	public ValidationDaemon(){

		super("Running validation daemon");

		entityValidationService = CdmStore.getService(IEntityValidationService.class);

	}

	@Override

	protected void canceling(){

		cancelRequested = true;

	}

	/**

	 * This method is called by {@link ValidationContextListener} rather than

	 * {@link Job#cancel()}, because that method does not have the desired

	 * effect.

	 */

	public void setCancelRequested(){

		cancelRequested = true;

	}

	@Override

	protected IStatus run(IProgressMonitor monitor){

		MarkerManager markerManager;

		List<EntityValidation> results;

		try {

			while (!cancelRequested) {

				results = entityValidationService.getValidationResults();

				markerManager = new MarkerManager(results);

				markerManager.deleteObsoleteMarkers();

				markerManager.createMarkers();

				Thread.sleep(SLEEP_TIME);

			}

			MessagingUtils.info("Validation module stopped");

			return Status.OK_STATUS;

		}

		catch (Throwable t) {

			MessagingUtils.info("Validation module terminated unexpectedly: " + t.getMessage());

			return Status.CANCEL_STATUS;

		}

	}

}