modules/compute/src/main/java/org/apache/ignite/internal/compute/AntiHijackJobExecution.java

/*
 * 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.ignite.internal.compute;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
import org.apache.ignite.compute.JobExecution;
import org.apache.ignite.compute.JobStatus;
import org.apache.ignite.internal.thread.PublicApiThreading;
import org.jetbrains.annotations.Nullable;

/**
 * Wrapper around {@link JobExecution} that adds protection against thread hijacking by users.
 */
public class AntiHijackJobExecution<R> implements JobExecution<R> {
    private final JobExecution<R> execution;
    private final Executor asyncContinuationExecutor;

    /**
     * Constructor.
     */
    public AntiHijackJobExecution(JobExecution<R> execution, Executor asyncContinuationExecutor) {
        this.execution = execution;
        this.asyncContinuationExecutor = asyncContinuationExecutor;
    }

    @Override
    public CompletableFuture<R> resultAsync() {
        return preventThreadHijack(execution.resultAsync());
    }

    @Override
    public CompletableFuture<@Nullable JobStatus> statusAsync() {
        return preventThreadHijack(execution.statusAsync());
    }

    @Override
    public CompletableFuture<@Nullable Boolean> cancelAsync() {
        return preventThreadHijack(execution.cancelAsync());
    }

    @Override
    public CompletableFuture<@Nullable Boolean> changePriorityAsync(int newPriority) {
        return preventThreadHijack(execution.changePriorityAsync(newPriority));
    }

    protected <T> CompletableFuture<T> preventThreadHijack(CompletableFuture<T> originalFuture) {
        return PublicApiThreading.preventThreadHijack(originalFuture, asyncContinuationExecutor);
    }
}