| /* |
| * 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.simulator.systems; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.function.Consumer; |
| |
| import org.apache.cassandra.distributed.api.IInvokableInstance; |
| import org.apache.cassandra.distributed.api.IIsolatedExecutor.SerializableRunnable; |
| import org.apache.cassandra.net.Verb; |
| import org.apache.cassandra.simulator.ActionList; |
| import org.apache.cassandra.simulator.OrderOn; |
| import org.apache.cassandra.simulator.systems.InterceptedExecution.InterceptedTaskExecution; |
| import org.apache.cassandra.utils.Throwables; |
| |
| import static org.apache.cassandra.simulator.systems.SimulatedAction.Kind.TASK; |
| |
| public class SimulatedActionTask extends SimulatedAction implements Runnable |
| { |
| InterceptedExecution task; |
| |
| public SimulatedActionTask(Object description, Modifiers self, Modifiers transitive, Verb forVerb, SimulatedSystems simulated, InterceptedExecution task) |
| { |
| this(description, TASK, OrderOn.NONE, self, transitive, Collections.emptyMap(), forVerb, simulated, task); |
| } |
| |
| public SimulatedActionTask(Object description, Kind kind, OrderOn orderOn, Modifiers self, Modifiers transitive, Map<Verb, Modifiers> verbModifiers, Verb forVerb, SimulatedSystems simulated, InterceptedExecution task) |
| { |
| super(description, kind, orderOn, self, transitive, verbModifiers, forVerb, simulated); |
| this.task = task; |
| task.onCancel(this); |
| } |
| |
| public SimulatedActionTask(Object description, Modifiers self, Modifiers children, SimulatedSystems simulated, IInvokableInstance on, SerializableRunnable run) |
| { |
| super(description, self, children, null, simulated); |
| this.task = unsafeAsTask(on, asSafeRunnable(on, run), simulated.failures); |
| task.onCancel(this); |
| } |
| |
| private SimulatedActionTask(Object description, Modifiers self, Modifiers children, SimulatedSystems simulated, IInvokableInstance on, InterceptedExecution task) |
| { |
| super(description, self, children, null, simulated); |
| this.task = task; |
| task.onCancel(this); |
| } |
| |
| /** |
| * To be used to create actions on runnable that are not serializable but are anyway safe to invoke |
| */ |
| public static SimulatedActionTask unsafeTask(Object description, Modifiers self, Modifiers transitive, SimulatedSystems simulated, IInvokableInstance on, Runnable run) |
| { |
| return new SimulatedActionTask(description, self, transitive, simulated, on, unsafeAsTask(on, run, simulated.failures)); |
| } |
| |
| protected static Runnable asSafeRunnable(IInvokableInstance on, SerializableRunnable run) |
| { |
| return () -> on.unsafeRunOnThisThread(run); |
| } |
| |
| protected static InterceptedTaskExecution unsafeAsTask(IInvokableInstance on, Runnable runnable, Consumer<? super Throwable> onFailure) |
| { |
| return new InterceptedTaskExecution((InterceptingExecutor) on.executor()) |
| { |
| public void run() |
| { |
| // we'll be invoked on the node's executor, but we need to ensure the task is loaded on its classloader |
| try { runnable.run(); } |
| catch (Throwable t) { onFailure.accept(t); } |
| } |
| }; |
| } |
| |
| @Override |
| protected InterceptedExecution task() |
| { |
| return task; |
| } |
| |
| @Override |
| protected ActionList performAndRegister() |
| { |
| try |
| { |
| return super.performAndRegister(); |
| } |
| finally |
| { |
| task = null; |
| } |
| } |
| |
| @Override |
| protected Throwable safeInvalidate(boolean isCancellation) |
| { |
| try |
| { |
| if (task != null) |
| { |
| task.onCancel(null); |
| task.cancel(); |
| task = null; |
| } |
| |
| return super.safeInvalidate(isCancellation); |
| } |
| catch (Throwable t) |
| { |
| return Throwables.merge(t, super.safeInvalidate(isCancellation)); |
| } |
| } |
| |
| @Override |
| public void run() |
| { |
| // cancellation invoked on the task by the application |
| task = null; |
| super.cancel(); |
| } |
| } |