com.github.mcollovati.quarkus.hilla.graal.DelayedSchedulerExecutorsFactory Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of quarkus-hilla-commons Show documentation
Common files for Quarkus Hilla extension.
There is a newer version: 24.5.0
Show newest version
/*
 * Copyright 2000-2024 Marco Collovati, Dario Götze
 *
 * Licensed 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 com.github.mcollovati.quarkus.hilla.graal;

import java.util.Collection;
import java.util.List;
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;
import java.util.concurrent.atomic.AtomicReference;

import org.atmosphere.cpr.AtmosphereConfig;
import org.atmosphere.util.ExecutorsFactory;

/**
 * A replacement for {@link ExecutorsFactory#getScheduler(AtmosphereConfig)}
 * that returns a {@link ScheduledExecutorService} that postpones initialization
 * until it is effectively used.
 * 
 * 
 * This is needed to prevent thread to be started during STATIC_INIT phase of
 * native build. The {@link ExecutorsFactory#getScheduler(AtmosphereConfig)}
 * method is renamed by bytecode transformation, and all calls to redirected to
 * {@link #getScheduler(AtmosphereConfig)}. The
 * {@link #newScheduler(AtmosphereConfig)} method is also rewritten to call the
 * renamed {@link ExecutorsFactory#getScheduler(AtmosphereConfig)} method.
 */
public class DelayedSchedulerExecutorsFactory {

    public static ScheduledExecutorService getScheduler(final AtmosphereConfig config) {
        return new DelayedSchedulerExecutor(config);
    }

    private static ScheduledExecutorService newScheduler(AtmosphereConfig config) {
        // This call will be replaced at build time
        return ExecutorsFactory.getScheduler(config);
    }

    private static class DelayedSchedulerExecutor implements ScheduledExecutorService {

        private final AtmosphereConfig config;
        private final AtomicReference delegate = new AtomicReference<>();

        public DelayedSchedulerExecutor(AtmosphereConfig config) {
            this.config = config;
        }

        public ScheduledExecutorService getDelegate() {
            return delegate.updateAndGet(executor -> {
                if (executor == null) {
                    return DelayedSchedulerExecutorsFactory.newScheduler(config);
                }
                return executor;
            });
        }

        @Override
        public ScheduledFuture schedule(Runnable command, long delay, TimeUnit unit) {
            return getDelegate().schedule(command, delay, unit);
        }

        @Override
        public  ScheduledFuture schedule(Callable callable, long delay, TimeUnit unit) {
            return getDelegate().schedule(callable, delay, unit);
        }

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

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

        @Override
        public void shutdown() {
            getDelegate().shutdown();
        }

        @Override
        public List shutdownNow() {
            return getDelegate().shutdownNow();
        }

        @Override
        public boolean isShutdown() {
            return getDelegate().isShutdown();
        }

        @Override
        public boolean isTerminated() {
            return getDelegate().isTerminated();
        }

        @Override
        public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
            return getDelegate().awaitTermination(timeout, unit);
        }

        @Override
        public  Future submit(Callable task) {
            return getDelegate().submit(task);
        }

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

        @Override
        public Future submit(Runnable task) {
            return getDelegate().submit(task);
        }

        @Override
        public  List> invokeAll(Collection> tasks) throws InterruptedException {
            return getDelegate().invokeAll(tasks);
        }

        @Override
        public  List> invokeAll(Collection> tasks, long timeout, TimeUnit unit)
                throws InterruptedException {
            return getDelegate().invokeAll(tasks, timeout, unit);
        }

        @Override
        public  T invokeAny(Collection> tasks)
                throws InterruptedException, ExecutionException {
            return getDelegate().invokeAny(tasks);
        }

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

        @Override
        public void execute(Runnable command) {
            getDelegate().execute(command);
        }
    }
}