UncloseableScheduledExecutorService.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.doris.common.util;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public final class UncloseableScheduledExecutorService
        implements ScheduledExecutorService {

    private final ScheduledExecutorService delegate;

    public UncloseableScheduledExecutorService(
            ScheduledExecutorService delegate) {
        this.delegate = Objects.requireNonNull(delegate);
    }

    // ================= Lifecycle methods (NO-OP) =================
    @Override
    public void shutdown() {
        // NO-OP
    }

    @Override
    public List<Runnable> shutdownNow() {
        return Collections.emptyList();
    }

    @Override
    public boolean isShutdown() {
        return false;
    }

    @Override
    public boolean isTerminated() {
        return false;
    }

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit) {
        return false;
    }

    // ================= Scheduled methods =================
    @Override
    public ScheduledFuture<?> schedule(
            Runnable command, long delay, TimeUnit unit) {
        return delegate.schedule(command, delay, unit);
    }

    @Override
    public <V> ScheduledFuture<V> schedule(
            Callable<V> callable, long delay, TimeUnit unit) {
        return delegate.schedule(callable, delay, unit);
    }

    @Override
    public ScheduledFuture<?> scheduleAtFixedRate(
            Runnable command,
            long initialDelay,
            long period,
            TimeUnit unit) {
        return delegate.scheduleAtFixedRate(
                command, initialDelay, period, unit);
    }

    @Override
    public ScheduledFuture<?> scheduleWithFixedDelay(
            Runnable command,
            long initialDelay,
            long delay,
            TimeUnit unit) {
        return delegate.scheduleWithFixedDelay(
                command, initialDelay, delay, unit);
    }

    // ================= Executor methods =================
    @Override
    public void execute(Runnable command) {
        delegate.execute(command);
    }

    @Override
    public <T> Future<T> submit(Callable<T> task) {
        return delegate.submit(task);
    }

    @Override
    public <T> Future<T> submit(Runnable task, T result) {
        return delegate.submit(task, result);
    }

    @Override
    public Future<?> submit(Runnable task) {
        return delegate.submit(task);
    }

    @Override
    public <T> List<Future<T>> invokeAll(
            Collection<? extends Callable<T>> tasks)
            throws InterruptedException {
        return delegate.invokeAll(tasks);
    }

    @Override
    public <T> List<Future<T>> invokeAll(
            Collection<? extends Callable<T>> tasks,
            long timeout,
            TimeUnit unit)
            throws InterruptedException {
        return delegate.invokeAll(tasks, timeout, unit);
    }

    @Override
    public <T> T invokeAny(
            Collection<? extends Callable<T>> tasks)
            throws InterruptedException, ExecutionException {
        return delegate.invokeAny(tasks);
    }

    @Override
    public <T> T invokeAny(
            Collection<? extends Callable<T>> tasks,
            long timeout,
            TimeUnit unit)
            throws InterruptedException, ExecutionException, TimeoutException {
        return delegate.invokeAny(tasks, timeout, unit);
    }
}