/*
* 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
* alone subject to any of the requirements of the GNU Affero GPL
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*/
package org.smallmind.phalanx.wire.amqp.rabbitmq;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
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.AbstractRequestTransport;
import org.smallmind.phalanx.wire.Address;
import org.smallmind.phalanx.wire.ConversationType;
import org.smallmind.phalanx.wire.MetricInteraction;
import org.smallmind.phalanx.wire.SignalCodec;
import org.smallmind.phalanx.wire.TransportException;
import org.smallmind.phalanx.wire.Voice;
import org.smallmind.phalanx.wire.WireContext;
public class RabbitMQRequestTransport extends AbstractRequestTransport implements MetricConfigurationProvider {
private final AtomicBoolean closed = new AtomicBoolean(false);
private final MetricConfiguration metricConfiguration;
private final SignalCodec signalCodec;
private final LinkedBlockingQueue<RequestMessageRouter> routerQueue;
private final RequestMessageRouter[] requestMessageRouters;
private final String callerId = SnowflakeId.newInstance().generateDottedString();
public RabbitMQRequestTransport (MetricConfiguration metricConfiguration, RabbitMQConnector rabbitMQConnector, NameConfiguration nameConfiguration, SignalCodec signalCodec, int clusterSize, int concurrencyLimit, int defaultTimeoutSeconds, int messageTTLSeconds)
throws IOException, InterruptedException, TimeoutException {
super(defaultTimeoutSeconds);
int routerIndex = 0;
this.metricConfiguration = metricConfiguration;
this.signalCodec = signalCodec;
requestMessageRouters = new RequestMessageRouter[clusterSize];
for (int index = 0; index < requestMessageRouters.length; index++) {
requestMessageRouters[index] = new RequestMessageRouter(rabbitMQConnector, nameConfiguration, this, signalCodec, callerId, index, messageTTLSeconds);
requestMessageRouters[index].initialize();
}
routerQueue = new LinkedBlockingQueue<>();
for (int index = 0; index < Math.max(clusterSize, concurrencyLimit); index++) {
routerQueue.add(requestMessageRouters[routerIndex]);
if (++routerIndex == requestMessageRouters.length) {
routerIndex = 0;
}
}
}
@Override
public MetricConfiguration getMetricConfiguration () {
return metricConfiguration;
}
@Override
public String getCallerId () {
return callerId;
}
@Override
public Object transmit (Voice voice, Address address, Map<String, Object> arguments, WireContext... contexts)
throws Throwable {
final RequestMessageRouter requestMessageRouter = acquireRequestMessageRouter();
try {
String messageId;
boolean inOnly = voice.getConversation().getConversationType().equals(ConversationType.IN_ONLY);
messageId = requestMessageRouter.publish(inOnly, (String)voice.getServiceGroup(), voice, address, arguments, contexts);
return InstrumentationManager.execute(new ChronometerInstrumentAndReturn<Object>(this, new MetricProperty("event", MetricInteraction.ACQUIRE_RESULT.getDisplay())) {
@Override
public Object withChronometer ()
throws Throwable {
return acquireResult(signalCodec, address, voice, messageId, inOnly);
}
});
} finally {
routerQueue.put(requestMessageRouter);
}
}
private RequestMessageRouter acquireRequestMessageRouter ()
throws Throwable {
return InstrumentationManager.execute(new ChronometerInstrumentAndReturn<RequestMessageRouter>(this, new MetricProperty("event", MetricInteraction.ACQUIRE_REQUEST_TRANSPORT.getDisplay())) {
@Override
public RequestMessageRouter withChronometer ()
throws TransportException, InterruptedException {
RequestMessageRouter messageTransmitter;
do {
messageTransmitter = routerQueue.poll(1, TimeUnit.SECONDS);
} while ((!closed.get()) && (messageTransmitter == null));
if (messageTransmitter == null) {
throw new TransportException("Message transmission has been closed");
}
return messageTransmitter;
}
});
}
@Override
public void close ()
throws IOException, InterruptedException, TimeoutException {
if (closed.compareAndSet(false, true)) {
for (RequestMessageRouter requestMessageRouter : requestMessageRouters) {
requestMessageRouter.close();
}
getCallbackMap().shutdown();
}
}
}