/*
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* Copyright (C) 2015 The Android Open Source Project
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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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import java.lang.reflect.Method;
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import java.lang.reflect.Type;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.Callable;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Future;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.CancellationException;
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import java.util.concurrent.TimeoutException;
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public class Main {
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// Workaround for b/18051191.
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class InnerClass {}
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private static class HashCodeQuery implements Callable<Integer> {
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public HashCodeQuery(Object obj) {
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m_obj = obj;
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}
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public Integer call() {
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Integer result;
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try {
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Class<?> c = Class.forName("Test");
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Method m = c.getMethod("synchronizedHashCode", Object.class);
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result = (Integer) m.invoke(null, m_obj);
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} catch (Exception e) {
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System.out.println("Hash code query exception");
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e.printStackTrace(System.out);
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result = -1;
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}
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return result;
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}
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private Object m_obj;
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private int m_index;
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}
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public static void main(String args[]) throws Exception {
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Object obj = new Object();
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int numThreads = 10;
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ExecutorService pool = Executors.newFixedThreadPool(numThreads);
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List<HashCodeQuery> queries = new ArrayList<HashCodeQuery>(numThreads);
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for (int i = 0; i < numThreads; ++i) {
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queries.add(new HashCodeQuery(obj));
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}
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try {
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List<Future<Integer>> results = pool.invokeAll(queries);
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int hash = obj.hashCode();
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for (int i = 0; i < numThreads; ++i) {
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int result = results.get(i).get();
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if (hash != result) {
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throw new Error("Query #" + i + " wrong. Expected " + hash + ", got " + result);
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}
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}
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pool.shutdown();
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} catch (CancellationException ex) {
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System.out.println("Job timeout");
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System.exit(1);
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}
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}
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}
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