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Fibers, Channels and Actors for the JVM

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/*
 * Quasar: lightweight threads and actors for the JVM.
 * Copyright (C) 2013, Parallel Universe Software Co. All rights reserved.
 * 
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *  
 *   or (per the licensee's choosing)
 *  
 * under the terms of the GNU Lesser General Public License version 3.0
 * as published by the Free Software Foundation.
 */
package co.paralleluniverse.actors.behaviors;

import co.paralleluniverse.actors.Actor;
import co.paralleluniverse.actors.ActorBuilder;
import co.paralleluniverse.actors.ActorRef;
import static co.paralleluniverse.actors.behaviors.RequestReplyHelper.from;
import static co.paralleluniverse.actors.behaviors.RequestReplyHelper.makeId;
import co.paralleluniverse.fibers.Joinable;
import co.paralleluniverse.fibers.SuspendExecution;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 *
 * @author pron
 */
public class GenServer extends GenBehavior {
    public GenServer(ActorRef actor) {
        super(actor);
    }

    public final V call(CallMessage m) throws InterruptedException, SuspendExecution {
        try {
            return call(m, 0, null);
        } catch (TimeoutException ex) {
            throw new AssertionError(ex);
        }
    }

    public final V call(CallMessage m, long timeout, TimeUnit unit) throws TimeoutException, InterruptedException, SuspendExecution {
        final GenResponseMessage response = RequestReplyHelper.call(ref, new GenServerRequest(from(), null, MessageType.CALL, m), timeout, unit);
        final V res = ((GenValueResponseMessage) response).getValue();
        return res;
    }

    public final void cast(CastMessage m) throws SuspendExecution {
        ref.send(new GenServerRequest(ActorRef.self(), makeId(), MessageType.CAST, m));
    }

    public static void cast(ActorRef server, Object m) throws SuspendExecution {
        server.send(new GenServerRequest(ActorRef.self(), makeId(), MessageType.CAST, m));
    }

    enum MessageType {
        CALL, CAST
    };

    static class GenServerRequest extends GenRequestMessage {
        private final MessageType type;
        private final Object message;

        public GenServerRequest(ActorRef sender, Object id, MessageType type, Object message) {
            super(sender, id);
            this.type = type;
            this.message = message;
        }

        public MessageType getType() {
            return type;
        }

        public Object getMessage() {
            return message;
        }
    }

    static final class Local extends GenServer implements LocalBehavior> {
        Local(ActorRef actor) {
            super(actor);
        }

        @Override
        public GenServer writeReplace() throws java.io.ObjectStreamException {
            return new GenServer<>(ref);
        }

        @Override
        public Actor build() {
            return ((ActorBuilder) ref).build();
        }

        @Override
        public void join() throws ExecutionException, InterruptedException {
            ((Joinable) ref).join();
        }

        @Override
        public void join(long timeout, TimeUnit unit) throws ExecutionException, InterruptedException, TimeoutException {
            ((Joinable) ref).join(timeout, unit);
        }

        @Override
        public Void get() throws ExecutionException, InterruptedException {
            return ((Joinable) ref).get();
        }

        @Override
        public Void get(long timeout, TimeUnit unit) throws ExecutionException, InterruptedException, TimeoutException {
            return ((Joinable) ref).get(timeout, unit);
        }

        @Override
        public boolean isDone() {
            return ((Joinable) ref).isDone();
        }
    }
}
    

    

    

            

    

            



    
    






    
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