@Test
public void workerOrchestrator() throws InterruptedException {
Reactor reactor = Reactors.reactor(env, Environment.WORK_QUEUE);
CountDownLatch latch = new CountDownLatch(3);
reactor.on(
Selectors.$("worker"),
new Consumer() {
@Override
public void accept(Object o) {
System.out.println(Thread.currentThread().getName() + " worker " + o);
reactor.notify("orchestrator", Event.wrap(1000));
latch.countDown();
System.out.println(Thread.currentThread().getName() + " ok");
}
});
reactor.on(
Selectors.$("orchestrator"),
new Consumer<Event<Integer>>() {
@Override
public void accept(Event<Integer> event) {
sendTask();
}
void sendTask() {
System.out.println(Thread.currentThread().getName() + " sendTask ");
reactor.notify("worker", Event.wrap(latch.getCount()));
latch.countDown();
}
});
reactor.notify("orchestrator", Event.wrap(1000));
Assert.isTrue(latch.await(10, TimeUnit.SECONDS));
}
/**
* Subclasses should register the given {@link reactor.net.NetChannel} for later use.
*
* @param ioChannel The channel object.
* @param netChannel The {@link NetChannel}.
* @param <C> The type of the channel object.
* @return {@link reactor.event.registry.Registration} of this channel in the {@link Registry}.
*/
protected <C> Registration<? extends NetChannel<IN, OUT>> register(
@Nonnull C ioChannel, @Nonnull NetChannel<IN, OUT> netChannel) {
Assert.notNull(ioChannel, "Channel cannot be null.");
Assert.notNull(netChannel, "NetChannel cannot be null.");
return netChannels.register(Selectors.$(ioChannel), netChannel);
}
/**
* Abstract base class that implements common functionality shared by clients and servers.
*
* @author Jon Brisbin
*/
public abstract class AbstractNetPeer<IN, OUT> {
private final Registry<NetChannel<IN, OUT>> netChannels =
new CachingRegistry<NetChannel<IN, OUT>>();
private final Event<AbstractNetPeer<IN, OUT>> selfEvent = Event.wrap(this);
private final Selector open = Selectors.$();
private final Selector close = Selectors.$();
private final Selector start = Selectors.$();
private final Selector shutdown = Selectors.$();
private final Environment env;
private final Reactor reactor;
private final Codec<Buffer, IN, OUT> codec;
private final Collection<Consumer<NetChannel<IN, OUT>>> consumers;
protected AbstractNetPeer(
@Nonnull Environment env,
@Nonnull Reactor reactor,
@Nullable Codec<Buffer, IN, OUT> codec,
@Nonnull Collection<Consumer<NetChannel<IN, OUT>>> consumers) {
this.env = env;
this.reactor = reactor;
this.codec = codec;
this.consumers = consumers;
for (final Consumer<NetChannel<IN, OUT>> consumer : consumers) {
reactor.on(
open,
new Consumer<Event<NetChannel<IN, OUT>>>() {
@Override
public void accept(Event<NetChannel<IN, OUT>> ev) {
consumer.accept(ev.getData());
}
});
}
}
public Promise<Boolean> close() {
Deferred<Boolean, Promise<Boolean>> d = Promises.defer(env, reactor.getDispatcher());
close(d);
return d.compose();
}
public void close(@Nullable final Consumer<Boolean> onClose) {
reactor.schedule(
new Consumer<Void>() {
@Override
public void accept(Void v) {
for (Registration<? extends NetChannel<IN, OUT>> reg : getChannels()) {
if (null == reg) {
continue;
}
doCloseChannel(reg.getObject());
}
getChannels().clear();
doClose(onClose);
}
},
null);
}
/**
* Subclasses should register the given {@link reactor.net.NetChannel} for later use.
*
* @param ioChannel The channel object.
* @param netChannel The {@link NetChannel}.
* @param <C> The type of the channel object.
* @return {@link reactor.event.registry.Registration} of this channel in the {@link Registry}.
*/
protected <C> Registration<? extends NetChannel<IN, OUT>> register(
@Nonnull C ioChannel, @Nonnull NetChannel<IN, OUT> netChannel) {
Assert.notNull(ioChannel, "Channel cannot be null.");
Assert.notNull(netChannel, "NetChannel cannot be null.");
return netChannels.register(Selectors.$(ioChannel), netChannel);
}
/**
* Find the {@link NetChannel} for the given IO channel object.
*
* @param ioChannel The channel object.
* @param <C> The type of the channel object.
* @return The {@link NetChannel} associated with the given channel.
*/
protected <C> NetChannel<IN, OUT> select(@Nonnull C ioChannel) {
Assert.notNull(ioChannel, "Channel cannot be null.");
Iterator<Registration<? extends NetChannel<IN, OUT>>> channs =
netChannels.select(ioChannel).iterator();
if (channs.hasNext()) {
return channs.next().getObject();
} else {
NetChannel<IN, OUT> conn = createChannel(ioChannel);
register(ioChannel, conn);
notifyOpen(conn);
return conn;
}
}
/**
* Close the given channel.
*
* @param channel The channel object.
* @param <C> The type of the channel object.
*/
protected <C> void close(@Nonnull C channel) {
Assert.notNull(channel, "Channel cannot be null");
for (Registration<? extends NetChannel<IN, OUT>> reg : netChannels.select(channel)) {
NetChannel<IN, OUT> chann = reg.getObject();
reg.cancel();
notifyClose(chann);
}
}
/**
* Subclasses should implement this method and provide a {@link NetChannel} object.
*
* @param ioChannel The IO channel object to associate with this {@link reactor.net.NetChannel}.
* @param <C> The type of the channel object.
* @return The new {@link NetChannel} object.
*/
protected abstract <C> NetChannel<IN, OUT> createChannel(C ioChannel);
/** Notify this server's consumers that the server has started. */
protected void notifyStart(final Runnable started) {
getReactor().notify(start.getObject(), selfEvent);
if (null != started) {
getReactor()
.schedule(
new Consumer<Runnable>() {
@Override
public void accept(Runnable r) {
r.run();
}
},
started);
}
}
/**
* Notify this client's consumers than a global error has occurred.
*
* @param error The error to notify.
*/
protected void notifyError(@Nonnull Throwable error) {
Assert.notNull(error, "Error cannot be null.");
reactor.notify(error.getClass(), Event.wrap(error));
}
/**
* Notify this peer's consumers that the channel has been opened.
*
* @param channel The channel that was opened.
*/
protected void notifyOpen(@Nonnull NetChannel<IN, OUT> channel) {
reactor.notify(open.getObject(), Event.wrap(channel));
}
/**
* Notify this peer's consumers that the given channel has been closed.
*
* @param channel The channel that was closed.
*/
protected void notifyClose(@Nonnull NetChannel<IN, OUT> channel) {
reactor.notify(close.getObject(), Event.wrap(channel));
}
/** Notify this server's consumers that the server has stopped. */
protected void notifyShutdown() {
getReactor().notify(shutdown.getObject(), selfEvent);
}
/**
* Get the {@link Codec} in use.
*
* @return The codec. May be {@literal null}.
*/
@Nullable
protected Codec<Buffer, IN, OUT> getCodec() {
return codec;
}
@Nonnull
protected Environment getEnvironment() {
return env;
}
@Nonnull
protected Reactor getReactor() {
return reactor;
}
@Nonnull
protected Collection<Consumer<NetChannel<IN, OUT>>> getConsumers() {
return consumers;
}
@Nonnull
protected Registry<NetChannel<IN, OUT>> getChannels() {
return netChannels;
}
/**
* Subclasses should implement this method to perform the actual IO channel close.
*
* @param onClose
*/
protected void doClose(@Nullable Consumer<Boolean> onClose) {
getReactor().schedule(onClose, null);
}
/**
* Close the given channel.
*
* @param channel
*/
protected void doCloseChannel(NetChannel<IN, OUT> channel) {
channel.close();
}
}
