Java tutorial
/* * The MIT License * * Copyright (c) 2015 WANG Lingsong * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package org.jsfr.json; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import com.google.common.io.Resources; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.JsonObject; import org.openjdk.jmh.annotations.Benchmark; import org.openjdk.jmh.annotations.Fork; import org.openjdk.jmh.annotations.Measurement; import org.openjdk.jmh.annotations.Scope; import org.openjdk.jmh.annotations.Setup; import org.openjdk.jmh.annotations.State; import org.openjdk.jmh.annotations.Threads; import org.openjdk.jmh.annotations.Warmup; import org.openjdk.jmh.runner.Runner; import org.openjdk.jmh.runner.RunnerException; import org.openjdk.jmh.runner.options.Options; import org.openjdk.jmh.runner.options.OptionsBuilder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import profilers.FlightRecordingProfiler; import java.io.IOException; import java.nio.charset.StandardCharsets; import java.util.Iterator; import java.util.concurrent.TimeUnit; @Warmup(iterations = 10, time = 1, timeUnit = TimeUnit.SECONDS) @Measurement(iterations = 10, time = 1, timeUnit = TimeUnit.SECONDS) @Threads(1) @Fork(1) @State(Scope.Benchmark) public class BenchmarkCollectSingleValue { private static final Logger LOGGER = LoggerFactory.getLogger(BenchmarkCollectSingleValue.class); private Gson gson; private ObjectMapper om; private JsonSurfer gsonSurfer; private JsonSurfer jacksonSurfer; private JsonSurfer simpleSurfer; private SurfingConfiguration surfingConfiguration; private CollectOneListener collectOneListener; private String json; @Setup public void setup() throws Exception { gson = new GsonBuilder().create(); om = new ObjectMapper(); gsonSurfer = JsonSurfer.gson(); jacksonSurfer = JsonSurfer.jackson(); simpleSurfer = JsonSurfer.simple(); collectOneListener = new CollectOneListener(true); surfingConfiguration = SurfingConfiguration.builder().bind("$.store.book[0].author", collectOneListener) .build(); json = Resources.toString(Resources.getResource("sample.json"), StandardCharsets.UTF_8); } @Benchmark public Object benchmarkGsonWithJsonSurfer() { gsonSurfer.surf(json, surfingConfiguration); Object value = collectOneListener.getValue(); LOGGER.trace("The author of the first book: {}", value); return value; } @Benchmark public Object benchmarkJacksonWithJsonSurfer() { jacksonSurfer.surf(json, surfingConfiguration); Object value = collectOneListener.getValue(); LOGGER.trace("The author of the first book: {}", value); return value; } @Benchmark public Object benchmarkJsonSimpleWithJsonSurfer() { simpleSurfer.surf(json, surfingConfiguration); Object value = collectOneListener.getValue(); LOGGER.trace("The author of the first book: {}", value); return value; } @Benchmark public Object benchmarkGson() { JsonObject jsonObject = gson.fromJson(json, JsonObject.class); String value = jsonObject.getAsJsonObject("store").getAsJsonArray("book").get(0).getAsJsonObject() .getAsJsonPrimitive("author").getAsString(); LOGGER.trace("The author of the first book: {}", value); return value; } @Benchmark public Object benchmarkJackson() throws IOException { JsonNode jsonNode = om.readTree(json); Iterator<JsonNode> books = jsonNode.get("store").get("book").elements(); String value = books.next().get("author").asText(); LOGGER.trace("The author of the first book: {}", value); return value; } public static void main(String[] args) throws RunnerException { Options opt = new OptionsBuilder().include(BenchmarkCollectSingleValue.class.getSimpleName()) // .addProfiler(FlightRecordingProfiler.class) .build(); new Runner(opt).run(); } }