query/headless/org.eclipse.viatra.query.application/src/org/eclipse/viatra/query/application/common/ViatraQueryHeadlessBenchmark.java

/*******************************************************************************
 * Copyright (c) 2004-2011 Abel Hegedus, Istvan Rath and Daniel Varro
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-v20.html.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *******************************************************************************/
package org.eclipse.viatra.query.application.common;


import java.util.Collection;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.viatra.query.application.queries.EObjectMatch;
import org.eclipse.viatra.query.application.queries.EObjectMatcher;
import org.eclipse.viatra.query.runtime.api.IPatternMatch;
import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
import org.eclipse.viatra.query.runtime.api.ViatraQueryEngineManager;
import org.eclipse.viatra.query.runtime.api.ViatraQueryMatcher;
import org.eclipse.viatra.query.runtime.emf.EMFScope;
import org.eclipse.viatra.query.runtime.exception.ViatraQueryException;
import org.eclipse.viatra.query.runtime.extensibility.QuerySpecificationRegistry;

/**
 * @author Abel Hegedus
 * @author Istvan Rath
 *
 */
public class ViatraQueryHeadlessBenchmark {

	private Resource loadModel(String modelPath) {
		// Loads the resource
		long start = System.nanoTime();
		ResourceSet resourceSet = new ResourceSetImpl();
		URI fileURI = URI.createFileURI(modelPath);
		Resource resource = resourceSet.getResource(fileURI, true);

		long resourceInit = System.nanoTime();
		System.out.println("EMF load took: " + (resourceInit - start) / 1000000 + " ms");
		
		return resource;
	}

	
	private void prettyPrintMatches(StringBuilder results, Collection<? extends IPatternMatch> matches) {
		System.out.println("Found matches:");
		for (IPatternMatch match : matches) {
		  System.out.println(match.prettyPrint());
			results.append(match.prettyPrint());
		}
		
		if(matches.size() == 0) {
			results.append("Empty match set");
		}
	}
	
	private void measureMemory(StringBuilder results) {
		System.gc();
		System.gc();
		System.gc();
		System.gc();
		System.gc();

		try {
			Thread.sleep(1000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}

		long usedMemory = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
		System.out.println("Used memory: " + usedMemory + " bytes");
		System.out.println("Used memory: " + (usedMemory / 1024) / 1024 + " megabytes");


	}
	
	public String executePatternSpecificBenchmark(String modelPath) {
		StringBuilder results = new StringBuilder();
		
		Resource resource = loadModel(modelPath);

		if (resource != null) {
			try {
				// get all matches of the pattern
				long startMatching = System.nanoTime();
				ViatraQueryEngine engine = ViatraQueryEngineManager.getInstance().getQueryEngine(new EMFScope(resource));
				EObjectMatcher matcher = EObjectMatcher.on(engine);
				long matcherInit = System.nanoTime();
				Collection<EObjectMatch> matches = matcher.getAllMatches();
				long collectedMatches = System.nanoTime();
				System.out.println(
						"Init took: " + (matcherInit - startMatching) / 1000000 + " Collecting took: "
								+ (collectedMatches - matcherInit) / 1000000 + " ms");
				measureMemory(results);
				prettyPrintMatches(results, matches);
				
			} catch (ViatraQueryException e) {
				e.printStackTrace();
				results.append(e.getMessage());
			}
		} else {
			results.append("Resource not found");
		}
		return results.toString();
	}

	/**
	 * Returns the match set for patternFQN over the model in modelPath in pretty printed form
	 * 
	 * @param modelPath
	 * @param patternFQN
	 * @return
	 */
	@SuppressWarnings({ "unchecked", "rawtypes" })
	public String executeGenericBenchmark(String modelPath, String patternFQN) {
		StringBuilder results = new StringBuilder();
		
		Resource resource = loadModel(modelPath);

		if (resource != null) {
			try {
				long startMatching = System.nanoTime();
				ViatraQueryEngine engine = ViatraQueryEngineManager.getInstance().getQueryEngine(new EMFScope(resource));
				ViatraQueryMatcher matcher = QuerySpecificationRegistry.getQuerySpecification(patternFQN).getMatcher(engine);
				long matcherInit = System.nanoTime();
				// assuming that there is a pattern definition registered matching 'patternFQN'
				if (matcher!=null) {
					Collection<IPatternMatch> matches = matcher.getAllMatches();
					prettyPrintMatches(results, matches);
					// get all matches of the pattern
					long collectedMatches = System.nanoTime();
					System.out.println(
							"Init took: " + (matcherInit - startMatching) / 1000000 + " Collecting took: "
									+ (collectedMatches - matcherInit) / 1000000 + " ms");
					measureMemory(results);
					prettyPrintMatches(results, matches);
				}
			} catch (ViatraQueryException e) {
				e.printStackTrace();
				results.append(e.getMessage());
			}
		} else {
			results.append("Resource not found");
		}
		return results.toString();
	}
	
	
	
	
}