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Reference Implementation for JSR 236 - Concurrency Utilities for Java EE

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/*
 * Copyright (c) 2022 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */
package org.glassfish.enterprise.concurrent;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.RejectedExecutionException;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.naming.InitialContext;
import javax.naming.NamingException;

import org.glassfish.enterprise.concurrent.internal.ManagedCompletableFuture;

import jakarta.annotation.Priority;
import jakarta.enterprise.concurrent.Asynchronous;
import jakarta.enterprise.concurrent.ManagedExecutorService;
import jakarta.interceptor.AroundInvoke;
import jakarta.interceptor.Interceptor;
import jakarta.interceptor.InvocationContext;

/**
 * Interceptor for @Asynchronous.
 *
 * @author Petr Aubrecht <[email protected]>
 */
@Interceptor
@Asynchronous
@Priority(Interceptor.Priority.PLATFORM_BEFORE + 5)
public class AsynchronousInterceptor {
    static final Logger log = Logger.getLogger(AsynchronousInterceptor.class.getName());

    @AroundInvoke
    public Object intercept(InvocationContext context) throws Exception {
        String executor = context.getMethod().getAnnotation(Asynchronous.class).executor();
        executor = executor != null ? executor : "java:comp/DefaultManagedExecutorService"; // provide default value if there is none
        log.log(Level.FINE, "AsynchronousInterceptor.intercept around asynchronous method {0}, executor=''{1}''", new Object[]{context.getMethod(), executor});
        ManagedExecutorService mes;
        try {
            Object lookupMes = new InitialContext().lookup(executor);
            if (lookupMes == null) {
                throw new RejectedExecutionException("ManagedExecutorService with jndi '" + executor + "' not found!");
            }
            if (!(lookupMes instanceof ManagedExecutorService)) {
                throw new RejectedExecutionException("ManagedExecutorService with jndi '" + executor + "' must be of type jakarta.enterprise.concurrent.ManagedExecutorService, found " + lookupMes.getClass().getName());
            }
            mes = (ManagedExecutorService) lookupMes;
        } catch (NamingException ex) {
            throw new RejectedExecutionException("ManagedExecutorService with jndi '" + executor + "' not found as requested by asynchronous method " + context.getMethod());
        }
        CompletableFuture