// GPars - Groovy Parallel Systems
//
// Copyright © 2014 The original author or authors
//
// 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 groovyx.gpars.actor.remote;
import groovyx.gpars.actor.Actor;
import groovyx.gpars.dataflow.DataflowVariable;
import groovyx.gpars.dataflow.Promise;
import groovyx.gpars.remote.LocalHost;
import groovyx.gpars.remote.message.RemoteActorRequestMsg;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* Remoting context for Actors. Manages serialization, publishing and retrieval.
*
* @author Rafal Slawik
*/
public final class RemoteActors extends LocalHost {
/**
* Stores Actors published in context of this instance of RemoteActors.
*/
private final ConcurrentMap<String, Actor> publishedActors;
/**
* Stores promises to remote instances of Actors.
*/
private final ConcurrentMap<String, DataflowVariable<Actor>> remoteActors;
private RemoteActors() {
publishedActors = new ConcurrentHashMap<>();
remoteActors = new ConcurrentHashMap<>();
}
/**
* Publishes {@link groovyx.gpars.actor.Actor} under given name.
* It overrides previously published Actor if the same name is given.
* @param actor the Actor to be published
* @param name the name under which Actor is published
*/
public void publish(Actor actor, String name) {
publishedActors.put(name, actor);
}
/**
* Retrieves {@link groovyx.gpars.actor.Actor} published under specified name on remote host.
* @param host the address of remote host
* @param port the port of remote host
* @param name the name under which Actor was published
* @return promise of {@link groovyx.gpars.actor.remote.RemoteActor}
*/
public Promise<Actor> get(String host, int port, String name) {
return getPromise(remoteActors, name, host, port, new RemoteActorRequestMsg(this.getId(), name));
}
public static RemoteActors create() {
return new RemoteActors();
}
@Override
public <T> void registerProxy(Class<T> klass, String name, T object) {
if (klass == RemoteActor.class) {
remoteActors.get(name).bind(((Actor) object));
return;
}
throw new IllegalArgumentException("Unsupported proxy type");
}
@Override
public <T> T get(Class<T> klass, String name) {
if (klass == Actor.class) {
return klass.cast(publishedActors.get(name));
}
throw new IllegalArgumentException("Unsupported type");
}
}