/*******************************************************************************
 * 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.tests.api.request.misc;

import java.util.HashSet;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

import org.junit.Test;
import org.simantics.db.ReadGraph;
import org.simantics.db.Session;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.procedure.SyncListener;
import org.simantics.db.request.Read;
import org.simantics.db.testing.base.TestCommonPerf;
import org.simantics.layer0.Layer0;

public class SyncRequestTest3 extends TestCommonPerf {
    
    private static final int COUNT = 10000;

    private static final int DEADLINE = 1000;
    
	@Test
    public void test() throws Exception {

        final Session session = getSession();
        
        final HashSet<Integer> check = new HashSet<Integer>();
        for(int i=0;i<COUNT;i++) check.add(i);
        
        final Semaphore s = new Semaphore(0);
        
        long start = System.nanoTime();
        
        for(int i=0;i<COUNT;i++) {
            
            final int index = i;

            session.asyncRequest(new Read<String>() {

                @Override
                public String perform(ReadGraph graph) throws DatabaseException {
                    Layer0 l0 = Layer0.getInstance(graph);
                    return graph.getPossibleRelatedValue(rl, l0.HasName);
                }

            }, new SyncListener<String>() {

                @Override
                public void exception(ReadGraph graph, Throwable throwable) throws DatabaseException {
                    throwable.printStackTrace();
                }

                @Override
                public void execute(ReadGraph graph, String result) throws DatabaseException {
                    synchronized(check) {
                        check.remove(index);
                        if(check.isEmpty()) s.release();
                    }
                }

                @Override
                public boolean isDisposed() {
                    return false;
                }

            });

        }
        
        boolean success = s.tryAcquire(DEADLINE, TimeUnit.MILLISECONDS);

        long end = System.nanoTime();

        String t = "SyncRequestTest3 finished in " + 1e-9*(double)(end-start) + " s."
        + " Limit was < " + (double)DEADLINE / 1000.0 + " s.";
        System.out.println(t);

        if (!success)
        	fail(t);
    }
}