/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
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*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
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package org.smallmind.phalanx.wire.jms;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.TransferQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
import javax.jms.BytesMessage;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Topic;
import org.smallmind.instrument.ChronometerInstrumentAndReturn;
import org.smallmind.instrument.InstrumentationManager;
import org.smallmind.instrument.MetricProperty;
import org.smallmind.instrument.config.MetricConfiguration;
import org.smallmind.instrument.config.MetricConfigurationProvider;
import org.smallmind.nutsnbolts.util.SnowflakeId;
import org.smallmind.phalanx.wire.MetricInteraction;
import org.smallmind.phalanx.wire.ResponseTransport;
import org.smallmind.phalanx.wire.ResultSignal;
import org.smallmind.phalanx.wire.ServiceDefinitionException;
import org.smallmind.phalanx.wire.SignalCodec;
import org.smallmind.phalanx.wire.TransportException;
import org.smallmind.phalanx.wire.TransportState;
import org.smallmind.phalanx.wire.WireInvocationCircuit;
import org.smallmind.phalanx.wire.WireProperty;
import org.smallmind.phalanx.wire.WiredService;
import org.smallmind.phalanx.worker.WorkManager;
import org.smallmind.phalanx.worker.WorkerFactory;
public class JmsResponseTransport extends WorkManager<InvocationWorker, Message> implements MetricConfigurationProvider, WorkerFactory<InvocationWorker, Message>, ResponseTransport {
private final AtomicBoolean closed = new AtomicBoolean(false);
private final AtomicReference<TransportState> transportStateRef = new AtomicReference<>(TransportState.PLAYING);
private final WireInvocationCircuit invocationCircuit = new WireInvocationCircuit();
private final SignalCodec signalCodec;
private final ConcurrentLinkedQueue<TopicOperator> responseQueue;
private final RequestListener[] shoutRequestListeners;
private final RequestListener[] talkRequestListeners;
private final RequestListener[] whisperRequestListeners;
private final ConnectionManager[] responseConnectionManagers;
private final String instanceId = SnowflakeId.newInstance().generateDottedString();
private final int maximumMessageLength;
public JmsResponseTransport (MetricConfiguration metricConfiguration, RoutingFactories routingFactories, MessagePolicy messagePolicy, ReconnectionPolicy reconnectionPolicy, SignalCodec signalCodec, String serviceGroup, int clusterSize, int concurrencyLimit, int maximumMessageLength)
throws InterruptedException, JMSException, TransportException {
super(metricConfiguration, InvocationWorker.class, concurrencyLimit);
int topicIndex = 0;
this.signalCodec = signalCodec;
this.maximumMessageLength = maximumMessageLength;
shoutRequestListeners = new RequestListener[clusterSize];
for (int index = 0; index < shoutRequestListeners.length; index++) {
shoutRequestListeners[index] = new RequestListener(this, new ConnectionManager(routingFactories.getRequestTopicFactory(), messagePolicy, reconnectionPolicy), routingFactories.getRequestTopicFactory().getDestination(), serviceGroup, null);
}
talkRequestListeners = new RequestListener[clusterSize];
for (int index = 0; index < talkRequestListeners.length; index++) {
talkRequestListeners[index] = new RequestListener(this, new ConnectionManager(routingFactories.getRequestQueueFactory(), messagePolicy, reconnectionPolicy), routingFactories.getRequestQueueFactory().getDestination(), serviceGroup, null);
}
whisperRequestListeners = new RequestListener[clusterSize];
for (int index = 0; index < whisperRequestListeners.length; index++) {
whisperRequestListeners[index] = new RequestListener(this, new ConnectionManager(routingFactories.getRequestTopicFactory(), messagePolicy, reconnectionPolicy), routingFactories.getRequestTopicFactory().getDestination(), serviceGroup, instanceId);
}
responseConnectionManagers = new ConnectionManager[clusterSize];
for (int index = 0; index < responseConnectionManagers.length; index++) {
responseConnectionManagers[index] = new ConnectionManager(routingFactories.getResponseTopicFactory(), messagePolicy, reconnectionPolicy);
}
responseQueue = new ConcurrentLinkedQueue<>();
for (int index = 0; index < Math.max(clusterSize, concurrencyLimit); index++) {
responseQueue.add(new TopicOperator(responseConnectionManagers[topicIndex], (Topic)routingFactories.getResponseTopicFactory().getDestination()));
if (++topicIndex == responseConnectionManagers.length) {
topicIndex = 0;
}
}
startUp(this);
}
@Override
public String getInstanceId () {
return instanceId;
}
@Override
public String register (Class<?> serviceInterface, WiredService targetService)
throws NoSuchMethodException, ServiceDefinitionException {
invocationCircuit.register(serviceInterface, targetService);
return instanceId;
}
@Override
public InvocationWorker createWorker (MetricConfiguration metricConfiguration, TransferQueue<Message> transferQueue) {
return new InvocationWorker(metricConfiguration, transferQueue, this, invocationCircuit, signalCodec, maximumMessageLength);
}
@Override
public TransportState getState () {
return transportStateRef.get();
}
@Override
public void play ()
throws JMSException {
synchronized (transportStateRef) {
if (transportStateRef.compareAndSet(TransportState.PAUSED, TransportState.PLAYING)) {
for (RequestListener requestListener : shoutRequestListeners) {
requestListener.play();
}
for (RequestListener requestListener : talkRequestListeners) {
requestListener.play();
}
for (RequestListener requestListener : whisperRequestListeners) {
requestListener.play();
}
}
}
}
@Override
public void pause ()
throws JMSException {
synchronized (transportStateRef) {
if (transportStateRef.compareAndSet(TransportState.PLAYING, TransportState.PAUSED)) {
for (RequestListener requestListener : shoutRequestListeners) {
requestListener.pause();
}
for (RequestListener requestListener : talkRequestListeners) {
requestListener.pause();
}
for (RequestListener requestListener : whisperRequestListeners) {
requestListener.pause();
}
}
}
}
@Override
public void transmit (String callerId, String correlationId, boolean error, String nativeType, Object result)
throws Throwable {
TopicOperator topicOperator;
if ((topicOperator = responseQueue.poll()) == null) {
throw new TransportException("Unable to take a TopicOperator, which should never happen - please contact your system administrator");
}
topicOperator.send(constructMessage(callerId, correlationId, topicOperator, new ResultSignal(error, nativeType, result)));
responseQueue.add(topicOperator);
}
private Message constructMessage (final String callerId, final String correlationId, final TopicOperator topicOperator, final ResultSignal resultSignal)
throws Throwable {
return InstrumentationManager.execute(new ChronometerInstrumentAndReturn<Message>(this, new MetricProperty("event", MetricInteraction.CONSTRUCT_MESSAGE.getDisplay())) {
@Override
public Message withChronometer ()
throws Exception {
BytesMessage responseMessage;
responseMessage = topicOperator.createMessage();
responseMessage.writeBytes(signalCodec.encode(resultSignal));
responseMessage.setJMSCorrelationID(correlationId);
responseMessage.setStringProperty(WireProperty.CALLER_ID.getKey(), callerId);
responseMessage.setStringProperty(WireProperty.CONTENT_TYPE.getKey(), signalCodec.getContentType());
responseMessage.setLongProperty(WireProperty.CLOCK.getKey(), System.currentTimeMillis());
return responseMessage;
}
});
}
@Override
public void close ()
throws JMSException, InterruptedException {
if (closed.compareAndSet(false, true)) {
synchronized (transportStateRef) {
transportStateRef.set(TransportState.CLOSED);
for (RequestListener requestListener : shoutRequestListeners) {
requestListener.close();
}
for (RequestListener requestListener : talkRequestListeners) {
requestListener.close();
}
for (RequestListener requestListener : whisperRequestListeners) {
requestListener.close();
}
for (ConnectionManager responseConnectionManager : responseConnectionManagers) {
responseConnectionManager.stop();
}
for (ConnectionManager responseConnectionManager : responseConnectionManagers) {
responseConnectionManager.close();
}
shutDown();
}
}
}
}