/*******************************************************************************
 * 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.performance.read;

import org.junit.Test;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.db.common.TransactionPolicyKeep;
import org.simantics.db.common.procedure.adapter.ListenerAdapter;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.request.AsyncRead;
import org.simantics.db.request.Read;
import org.simantics.db.request.WriteOnlyResult;
import org.simantics.db.service.ClusterControl;
import org.simantics.db.service.QueryControl;
import org.simantics.db.service.TransactionPolicySupport;
import org.simantics.db.testing.base.ExistingDatabaseTest;
import org.simantics.db.testing.common.Tests;
import org.simantics.layer0.Layer0;

/*
 *
 * Some statistics:
 *
 * == With WriteOnlyGraph ===
 *
 * -Creation of 50M write only resources (50M res, 0 stm)
 *  -Stream off = 1.88s
 *  -UpdateTransaction off = 5.11s
 * -Creation of 50M write only resources with single instanceof (50M res, 50M stm)
 *  -Stream off = 5.36s
 *  -UpdateTransaction off = 16.05s
 * -Creation of 50M write only resources with instanceof and consists of hierarchy (50M res, 150M stm)
 *  -Stream off = 12.20s
 *  -UpdateTransaction off = 39.3s
 * -Creation of 50M write only resources with string name (no instanceof) (100M res, 150M stm)
 *  -Stream off = 31.66s
 * -Creation of 50M write only resources full (100M res, 300M stm)
 *  -Stream off = 43.39s
 *
 * == With ClusterBuilder ==
 *
 * -Creation of 50M write only resources (50M res, 0 stm)
 *  -Stream off = 1.62s
 *  -UpdateTransaction off = 5.07
 * -Creation of 50M write only resources with single instanceof (50M res, 50M stm)
 *  -Stream off = 3.33s
 *  -UpdateTransaction off = 14.26s
 * -Creation of 50M write only resources with instanceof and consists of hierarchy (50M res, 150M stm)
 *  -Stream off = 6.09s
 *  -UpdateTransaction off = 32.42s
 * -Creation of 50M write only resources with string name (no instanceof) (100M res, 150M stm)
 *  -Stream off = 23.97s
 * -Creation of 50M write only resources full (100M res, 300M stm, 50M literals)
 *  -Stream off = 27.85s
 *
 */
public class ReadHierarchicalNames extends ExistingDatabaseTest {

	final private static String name = "name";
//	int[] sizes = { 2, 2, 2 };
//	int[] sizes = { 3, 2, 5 };
	int[] sizes = { 2*122, 64, 64 };

	private Resource time(String label, WriteOnlyResult<Resource> request) throws DatabaseException {

		long start = System.nanoTime();
		Resource result = getSession().syncRequest(request);
		long duration = System.nanoTime() - start;
		System.out.println(label + " = " + 1e-9*duration);
		return result;

	}

	private void time(String label, AsyncRead<Object> request) throws DatabaseException {

		long start = System.nanoTime();
		getSession().syncRequest(request);
		long duration = System.nanoTime() - start;
		System.out.println(label + " = " + 1e-9*duration);

		HierarchicalNames.validate();

	}

	private void time(String label, Read<Object> request) throws DatabaseException {

		long start = System.nanoTime();
		getSession().syncRequest(request);
		long duration = System.nanoTime() - start;
		System.out.println(label + " = " + 1e-9*duration);

		HierarchicalNames.validate();

	}

	private void listenTime(String label, Read<Object> request) throws DatabaseException {

		long start = System.nanoTime();
		getSession().syncRequest(request, new ListenerAdapter<Object>() {
			@Override
			public boolean isDisposed() {
				return false;
			}
		});
		long duration = System.nanoTime() - start;
		System.out.println(label + " = " + 1e-9*duration);

	}

	private void clearCaches() throws DatabaseException {

		Session session = Tests.getTestHandler().getSession();
		QueryControl cc = session.getService(QueryControl.class);
		ClusterControl ccr = session.getService(ClusterControl.class);
		cc.flush();
		ccr.collectClusters(ccr.used());
		System.gc();
		System.gc();
		System.gc();

	}
	@Test
	public void test() throws Exception {

		Layer0.getInstance(getSession());

		getSession().registerService(TransactionPolicySupport.class, new TransactionPolicyKeep());
//		getSession().registerService(TransactionPolicySupport.class, new TransactionPolicyRelease());

//		System.out.println("wait");
//		Thread.sleep(7000);
//		System.out.println("wait done");

		// First build the test data
		Resource root = time("write", HierarchicalNames.writeOnly(name, sizes));

//		System.out.println("wait");
//		Thread.sleep(3000);
//		System.out.println("wait done");

		// Read everything after write
		time("response", HierarchicalNames.readAsync(root));

//		System.out.println("wait");
//		Thread.sleep(3000);
//		System.out.println("wait done");

		// Clusters are now loaded
		time("async", HierarchicalNames.readAsync(root));
		time("async2", HierarchicalNames.readAsync2(root));
//		time("sync", HierarchicalNames.readSync(root));
//		listenTime("listenSync", HierarchicalNames.readSync(root));

	}

}