c1da2d7070
This annotation indicates that return value of the annotated method does not need to be used. If it is _not_ present on a non-void method, and if Error Prone's `CheckReturnValue` is active, then calling the method without using the result is an error. However, we are not enabling `CheckReturnValue` by default here. Also update some code that does ignore return values, so that the returned value is used, if only by assigning it to an unused variable.
145 lines
4.2 KiB
Java
145 lines
4.2 KiB
Java
/*
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* Copyright (C) 2008 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.gson.functional;
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import static com.google.common.truth.Truth.assertThat;
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import com.google.gson.Gson;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.atomic.AtomicBoolean;
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import org.junit.Before;
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import org.junit.Test;
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/**
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* Tests for ensuring Gson thread-safety.
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*
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* @author Inderjeet Singh
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* @author Joel Leitch
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*/
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public class ConcurrencyTest {
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private Gson gson;
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@Before
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public void setUp() throws Exception {
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gson = new Gson();
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}
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/**
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* Source-code based on
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* http://groups.google.com/group/google-gson/browse_thread/thread/563bb51ee2495081
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*/
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@Test
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public void testSingleThreadSerialization() {
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MyObject myObj = new MyObject();
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for (int i = 0; i < 10; i++) {
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String unused = gson.toJson(myObj);
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}
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}
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/**
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* Source-code based on
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* http://groups.google.com/group/google-gson/browse_thread/thread/563bb51ee2495081
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*/
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@Test
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public void testSingleThreadDeserialization() {
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for (int i = 0; i < 10; i++) {
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MyObject unused = gson.fromJson("{'a':'hello','b':'world','i':1}", MyObject.class);
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}
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}
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/**
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* Source-code based on
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* http://groups.google.com/group/google-gson/browse_thread/thread/563bb51ee2495081
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*/
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@Test
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public void testMultiThreadSerialization() throws InterruptedException {
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final CountDownLatch startLatch = new CountDownLatch(1);
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final CountDownLatch finishedLatch = new CountDownLatch(10);
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final AtomicBoolean failed = new AtomicBoolean(false);
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ExecutorService executor = Executors.newFixedThreadPool(10);
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for (int taskCount = 0; taskCount < 10; taskCount++) {
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executor.execute(new Runnable() {
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@Override public void run() {
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MyObject myObj = new MyObject();
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try {
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startLatch.await();
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for (int i = 0; i < 10; i++) {
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String unused = gson.toJson(myObj);
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}
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} catch (Throwable t) {
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failed.set(true);
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} finally {
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finishedLatch.countDown();
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}
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}
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});
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}
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startLatch.countDown();
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finishedLatch.await();
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assertThat(failed.get()).isFalse();
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}
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/**
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* Source-code based on
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* http://groups.google.com/group/google-gson/browse_thread/thread/563bb51ee2495081
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*/
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@Test
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public void testMultiThreadDeserialization() throws InterruptedException {
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final CountDownLatch startLatch = new CountDownLatch(1);
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final CountDownLatch finishedLatch = new CountDownLatch(10);
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final AtomicBoolean failed = new AtomicBoolean(false);
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ExecutorService executor = Executors.newFixedThreadPool(10);
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for (int taskCount = 0; taskCount < 10; taskCount++) {
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executor.execute(new Runnable() {
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@Override public void run() {
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try {
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startLatch.await();
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for (int i = 0; i < 10; i++) {
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MyObject unused = gson.fromJson("{'a':'hello','b':'world','i':1}", MyObject.class);
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}
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} catch (Throwable t) {
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failed.set(true);
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} finally {
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finishedLatch.countDown();
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}
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}
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});
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}
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startLatch.countDown();
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finishedLatch.await();
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assertThat(failed.get()).isFalse();
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}
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@SuppressWarnings("unused")
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private static class MyObject {
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String a;
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String b;
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int i;
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MyObject() {
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this("hello", "world", 42);
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}
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public MyObject(String a, String b, int i) {
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this.a = a;
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this.b = b;
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this.i = i;
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}
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}
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}
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