Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. */ package org.apache.shindig.social.opensocial.util; import org.apache.shindig.social.JsonLibTestsGuiceModule; import org.apache.shindig.social.SocialApiTestsGuiceModule; import org.apache.shindig.social.core.model.ActivityImpl; import org.apache.shindig.social.core.model.AddressImpl; import org.apache.shindig.social.core.model.ListFieldImpl; import org.apache.shindig.social.core.model.MediaItemImpl; import org.apache.shindig.social.core.model.NameImpl; import org.apache.shindig.social.core.model.PersonImpl; import org.apache.shindig.social.core.util.BeanJsonConverter; import org.apache.shindig.social.core.util.BeanJsonLibConverter; import org.apache.shindig.social.opensocial.model.Activity; import org.apache.shindig.social.opensocial.model.Address; import org.apache.shindig.social.opensocial.model.ListField; import org.apache.shindig.social.opensocial.model.MediaItem; import org.apache.shindig.social.opensocial.model.Person; import com.google.common.collect.Lists; import com.google.inject.Guice; import com.google.inject.Injector; import junit.framework.TestCase; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.json.JSONObject; public class JsonConverterPerformancePerf extends TestCase { private static final Log log = LogFactory.getLog(JsonConverterPerformancePerf.class); private static final int TEST_SIZE = 10000; private Person johnDoe; private Activity activity; private BeanJsonLibConverter beanJsonLibConverter; private BeanJsonConverter beanJsonConverter; @Override public void setUp() throws Exception { super.setUp(); johnDoe = new PersonImpl("johnDoeId", "Johnny", new NameImpl("John Doe")); johnDoe.setPhoneNumbers(Lists.<ListField>newArrayList(new ListFieldImpl("home", "+33H000000000"), new ListFieldImpl("mobile", "+33M000000000"), new ListFieldImpl("work", "+33W000000000"))); johnDoe.setAddresses(Lists.<Address>newArrayList(new AddressImpl("My home address"))); johnDoe.setEmails(Lists.<ListField>newArrayList(new ListFieldImpl("work", "john.doe@work.bar"), new ListFieldImpl("home", "john.doe@home.bar"))); activity = new ActivityImpl("activityId", johnDoe.getId()); activity.setMediaItems(Lists .<MediaItem>newArrayList(new MediaItemImpl("image/jpg", MediaItem.Type.IMAGE, "http://foo.bar"))); Injector injector = Guice.createInjector(new JsonLibTestsGuiceModule()); beanJsonLibConverter = injector.getInstance(BeanJsonLibConverter.class); beanJsonConverter = new BeanJsonConverter(Guice.createInjector(new SocialApiTestsGuiceModule())); } public static class SpecialPerson extends PersonImpl { private String newfield; public SpecialPerson() { super(); } public SpecialPerson(String id, String name, String newfield) { super(id, name, new NameImpl(name)); this.newfield = newfield; } public String getNewfield() { return newfield; } public void setNewfield(String newfield) { this.newfield = newfield; } } public void testToJsonLibOnInheritedClassOutput() throws Exception { SpecialPerson[] spa = new SpecialPerson[TEST_SIZE]; for (int i = 0; i < TEST_SIZE; i++) { spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense"); } Runtime r = Runtime.getRuntime(); r.gc(); long memstart = r.totalMemory() - r.freeMemory(); long startOutput = System.currentTimeMillis(); String[] output = new String[TEST_SIZE]; for (int i = 0; i < TEST_SIZE; i++) { output[i] = beanJsonLibConverter.convertToString(spa[i]); } long endOutput = System.currentTimeMillis(); long memend = r.totalMemory() - r.freeMemory(); String[] serializeOutput = new String[TEST_SIZE]; char[] source = output[0].toCharArray(); r.gc(); long stringsizeStart = r.totalMemory() - r.freeMemory(); for (int i = 0; i < TEST_SIZE; i++) { serializeOutput[i] = new String(source); } long stringsizeEnd = r.totalMemory() - r.freeMemory(); /* * Output the time per conversion and the memory usage - the output per * conversion. * */ log.info("SF JSON Lib Output " + average(startOutput, endOutput, TEST_SIZE) + " ms/conversion, " + (average(memstart, memend, TEST_SIZE) - average(stringsizeStart, stringsizeEnd, TEST_SIZE)) + " heap bytes/conversion, output packet consumed on average " + average(stringsizeStart, stringsizeEnd, TEST_SIZE) + " for a string length of " + output[0].length()); log.info("Output Was [" + output[0] + ']'); } public void testToJsonLibOnInheritedClassInput() throws Exception { SpecialPerson[] spa = new SpecialPerson[TEST_SIZE]; SpecialPerson[] sparesult = new SpecialPerson[TEST_SIZE]; Runtime r = Runtime.getRuntime(); r.gc(); long personStart = r.totalMemory() - r.freeMemory(); for (int i = 0; i < TEST_SIZE; i++) { spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense"); } long personEnd = r.totalMemory() - r.freeMemory(); String[] serializeOutput = new String[TEST_SIZE]; r.gc(); for (int i = 0; i < TEST_SIZE; i++) { serializeOutput[i] = beanJsonLibConverter.convertToString(spa[i]); } r.gc(); long memstart = r.totalMemory() - r.freeMemory(); long startInput = System.currentTimeMillis(); for (int i = 0; i < TEST_SIZE; i++) { sparesult[i] = beanJsonLibConverter.convertToObject(serializeOutput[i], SpecialPerson.class); } long endInput = System.currentTimeMillis(); long memend = r.totalMemory() - r.freeMemory(); log.info("SF JSON Lib Input " + average(startInput, endInput, TEST_SIZE) + " ms/conversion, " + (average(memstart, memend, TEST_SIZE) - average(personStart, personEnd, TEST_SIZE)) + " heap bytes/conversion, person object consumed on average " + average(personStart, personEnd, TEST_SIZE)); } public void testToJsonOnInheritedClassOutput() throws Exception { SpecialPerson[] spa = new SpecialPerson[TEST_SIZE]; for (int i = 0; i < TEST_SIZE; i++) { spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense"); } Runtime r = Runtime.getRuntime(); String[] output = new String[TEST_SIZE]; r.gc(); long memstart = r.totalMemory() - r.freeMemory(); long startOutput = System.currentTimeMillis(); for (int i = 0; i < TEST_SIZE; i++) { output[i] = ((JSONObject) beanJsonConverter.convertToJson(spa[i])).toString(); } long endOutput = System.currentTimeMillis(); long memend = r.totalMemory() - r.freeMemory(); String[] serializeOutput = new String[TEST_SIZE]; char[] source = output[0].toCharArray(); r.gc(); long stringsizeStart = r.totalMemory() - r.freeMemory(); for (int i = 0; i < TEST_SIZE; i++) { serializeOutput[i] = new String(source); } long stringsizeEnd = r.totalMemory() - r.freeMemory(); log.info("ORG JSON Lib Output " + average(startOutput, endOutput, TEST_SIZE) + " ms/conversion, " + (average(memstart, memend, TEST_SIZE) - average(stringsizeStart, stringsizeEnd, TEST_SIZE)) + " heap bytes/conversion, output packet consumed on average " + average(stringsizeStart, stringsizeEnd, TEST_SIZE) + " for a string length of " + output[0].length()); log.info("Output Was [" + output[0] + ']'); } /** * @param endOutput * @param startOutput * @param testSize * @return */ private float average(long start, long end, int testSize) { float r = end - start; r = r / testSize; return r; } public void XtestToJsonOnInheritedClassInput() throws Exception { SpecialPerson[] spa = new SpecialPerson[TEST_SIZE]; SpecialPerson[] sparesult = new SpecialPerson[TEST_SIZE]; Runtime r = Runtime.getRuntime(); r.gc(); long personStart = r.totalMemory() - r.freeMemory(); for (int i = 0; i < TEST_SIZE; i++) { spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense"); } long personEnd = r.totalMemory() - r.freeMemory(); String[] serializeOutput = new String[TEST_SIZE]; r.gc(); for (int i = 0; i < TEST_SIZE; i++) { serializeOutput[i] = beanJsonConverter.convertToString(spa[i]); } r.gc(); long memstart = r.totalMemory() - r.freeMemory(); long startInput = System.currentTimeMillis(); for (int i = 0; i < TEST_SIZE; i++) { sparesult[i] = beanJsonConverter.convertToObject(serializeOutput[i], SpecialPerson.class); } long endInput = System.currentTimeMillis(); long memend = r.totalMemory() - r.freeMemory(); log.info("SF JSON Lib Input " + average(startInput, endInput, TEST_SIZE) + " ms/conversion, " + (average(memstart, memend, TEST_SIZE) - average(personStart, personEnd, TEST_SIZE)) + " heap bytes/conversion, person object consumed on average " + average(personStart, personEnd, TEST_SIZE)); } }