/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.common.request;

import org.simantics.db.AsyncReadGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.procedure.AsyncProcedure;
import org.simantics.db.request.AsyncRead;

public abstract class AsyncReadRequest implements AsyncRead<Object> {

    @Override
    final public void perform(AsyncReadGraph graph, AsyncProcedure<Object> procedure) {
        try {
            run(graph);
            procedure.execute(graph, null);
        } catch (DatabaseException e) {
            procedure.exception(graph, e);
        }
    }
    
    @Override
    public int getFlags() {
        return 0;
    }

    @Override
    public int threadHash() {
    	return hashCode();
    }
    
    public abstract void run(AsyncReadGraph graph) throws DatabaseException;

}