| /* |
| * 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.cassandra.utils; |
| |
| import java.time.Duration; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.collect.HashMultimap; |
| import com.google.common.collect.Multimap; |
| |
| import org.apache.cassandra.concurrent.NamedThreadFactory; |
| |
| public final class AssertUtil |
| { |
| private AssertUtil() |
| { |
| |
| } |
| |
| /** |
| * Launch the input in another thread, throws a assert failure if it takes longer than the defined timeout. |
| * |
| * An attempt to halt the thread uses an interrupt, but only works if the underline logic respects it. |
| * |
| * The assert message will contain the stacktrace at the time of the timeout; grouped by common threads. |
| */ |
| public static void assertTimeoutPreemptively(Duration timeout, Executable fn) |
| { |
| StackTraceElement caller = Thread.currentThread().getStackTrace()[2]; |
| assertTimeoutPreemptively(caller, timeout, () -> { |
| fn.execute(); |
| return null; |
| }); |
| } |
| |
| /** |
| * Launch the input in another thread, throws a assert failure if it takes longer than the defined timeout. |
| * |
| * An attempt to halt the thread uses an interrupt, but only works if the underline logic respects it. |
| * |
| * The assert message will contain the stacktrace at the time of the timeout; grouped by common threads. |
| */ |
| public static <T> T assertTimeoutPreemptively(Duration timeout, ThrowingSupplier<T> supplier) |
| { |
| StackTraceElement caller = Thread.currentThread().getStackTrace()[2]; |
| return assertTimeoutPreemptively(caller, timeout, supplier); |
| } |
| |
| private static <T> T assertTimeoutPreemptively(StackTraceElement caller, Duration timeout, ThrowingSupplier<T> supplier) |
| { |
| |
| String[] split = caller.getClassName().split("\\."); |
| String simpleClassName = split[split.length - 1]; |
| ExecutorService executorService = Executors.newSingleThreadExecutor(new NamedThreadFactory("TimeoutTest-" + simpleClassName + "#" + caller.getMethodName())); |
| try |
| { |
| Future<T> future = executorService.submit(() -> { |
| try { |
| return supplier.get(); |
| } |
| catch (Throwable throwable) { |
| throw Throwables.throwAsUncheckedException(throwable); |
| } |
| }); |
| |
| long timeoutInNanos = timeout.toNanos(); |
| try |
| { |
| return future.get(timeoutInNanos, TimeUnit.NANOSECONDS); |
| } |
| catch (TimeoutException ex) |
| { |
| future.cancel(true); |
| Map<Thread, StackTraceElement[]> threadDump = Thread.getAllStackTraces(); |
| StringBuilder sb = new StringBuilder("execution timed out after ").append(TimeUnit.NANOSECONDS.toMillis(timeoutInNanos)).append(" ms\n"); |
| Multimap<List<StackTraceElement>, Thread> groupCommonThreads = HashMultimap.create(); |
| for (Map.Entry<Thread, StackTraceElement[]> e : threadDump.entrySet()) |
| groupCommonThreads.put(Arrays.asList(e.getValue()), e.getKey()); |
| |
| for (Map.Entry<List<StackTraceElement>, Collection<Thread>> e : groupCommonThreads.asMap().entrySet()) |
| { |
| sb.append("Threads: "); |
| Joiner.on(", ").appendTo(sb, e.getValue().stream().map(Thread::getName).iterator()); |
| sb.append("\n"); |
| for (StackTraceElement elem : e.getKey()) |
| sb.append("\t").append(elem.getClassName()).append(".").append(elem.getMethodName()).append("[").append(elem.getLineNumber()).append("]\n"); |
| sb.append("\n"); |
| } |
| throw new AssertionError(sb.toString()); |
| } |
| catch (InterruptedException e) |
| { |
| Thread.currentThread().interrupt(); |
| throw Throwables.throwAsUncheckedException(e); |
| } |
| catch (ExecutionException ex) |
| { |
| throw Throwables.throwAsUncheckedException(ex.getCause()); |
| } |
| catch (Throwable ex) |
| { |
| throw Throwables.throwAsUncheckedException(ex); |
| } |
| } |
| finally |
| { |
| executorService.shutdownNow(); |
| } |
| } |
| |
| public interface ThrowingSupplier<T> |
| { |
| T get() throws Throwable; |
| } |
| |
| public interface Executable |
| { |
| void execute() throws Throwable; |
| } |
| } |