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/*
 * Copyright 2016-2017 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 io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit;

import java.nio.charset.Charset;
import java.util.Date;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ScheduledFuture;

import io.bitsensor.plugins.shaded.org.apache.commons.logging.Log;
import io.bitsensor.plugins.shaded.org.apache.commons.logging.LogFactory;

import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.AmqpException;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.AmqpMessageReturnedException;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.AmqpReplyTimeoutException;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.CorrelationAwareMessagePostProcessor;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.Message;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.MessageListener;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.MessagePostProcessor;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.MessageProperties;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.connection.ConnectionFactory;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.core.RabbitTemplate;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.core.RabbitTemplate.ConfirmCallback;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.core.RabbitTemplate.ReturnCallback;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.support.CorrelationData;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.Correlation;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.converter.MessageConverter;
import io.bitsensor.plugins.shaded.org.springframework.beans.factory.BeanNameAware;
import io.bitsensor.plugins.shaded.org.springframework.context.SmartLifecycle;
import io.bitsensor.plugins.shaded.org.springframework.scheduling.TaskScheduler;
import io.bitsensor.plugins.shaded.org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import io.bitsensor.plugins.shaded.org.springframework.util.Assert;
import io.bitsensor.plugins.shaded.org.springframework.util.concurrent.ListenableFuture;
import io.bitsensor.plugins.shaded.org.springframework.util.concurrent.SettableListenableFuture;

/**
 * Provides asynchronous send and receive operations returning a {@link ListenableFuture}
 * allowing the caller to obtain the reply later, using {@code get()} or a callback.
 * 

 * When confirms are enabled, the future has a confirm property which is itself a
 * {@link ListenableFuture}. If the reply is received before the publisher confirm,
 * the confirm is discarded since the reply implicitly indicates the message was
 * published.
 * 

 * Returned (undeliverable) request messages are presented as a
 * {@link AmqpMessageReturnedException} cause of an {@link ExecutionException}.
 * 

 * Internally, the template uses a {@link RabbitTemplate} and a
 * {@link SimpleMessageListenerContainer} either provided or constructed internally.
 * If an external {@link RabbitTemplate} is provided and confirms/returns are enabled,
 * it must not previously have had callbacks registered because this object needs to
 * be the callback.
 *
 * @author Gary Russell
 * @since 1.6
 */
public class AsyncRabbitTemplate implements SmartLifecycle, MessageListener, ReturnCallback, ConfirmCallback,
		BeanNameAware {

	public static final int DEFAULT_RECEIVE_TIMEOUT = 30000;

	private final Log logger = LogFactory.getLog(this.getClass());

	private final RabbitTemplate template;

	private final SimpleMessageListenerContainer container;

	private final String replyAddress;

	@SuppressWarnings("rawtypes")
	private final ConcurrentMap pending = new ConcurrentHashMap();

	@SuppressWarnings("rawtypes")
	private final CorrelationMessagePostProcessor messagePostProcessor = new CorrelationMessagePostProcessor();

	private volatile boolean running;

	private volatile boolean enableConfirms;

	private volatile long receiveTimeout = DEFAULT_RECEIVE_TIMEOUT;

	private int phase;

	private boolean autoStartup = true;

	private Charset charset = Charset.forName("UTF-8");

	private String beanName;

	private TaskScheduler taskScheduler;

	private boolean internalTaskScheduler = true;

	/**
	 * Construct an instance using the provided arguments. Replies will be
	 * routed to the default exchange using the reply queue name as the routing
	 * key.
	 * @param connectionFactory the connection factory.
	 * @param exchange the default exchange to which requests will be sent.
	 * @param routingKey the default routing key.
	 * @param replyQueue the name of the reply queue to listen for replies.
	 */
	public AsyncRabbitTemplate(ConnectionFactory connectionFactory, String exchange, String routingKey,
	                           String replyQueue) {
		this(connectionFactory, exchange, routingKey, replyQueue, null);
	}

	/**
	 * Construct an instance using the provided arguments. If 'replyAddress' is null,
	 * replies will be routed to the default exchange using the reply queue name as the
	 * routing key. Otherwise it should have the form exchange/routingKey and must
	 * cause messages to be routed to the reply queue.
	 * @param connectionFactory the connection factory.
	 * @param exchange the default exchange to which requests will be sent.
	 * @param routingKey the default routing key.
	 * @param replyQueue the name of the reply queue to listen for replies.
	 * @param replyAddress the reply address (exchange/routingKey).
	 */
	public AsyncRabbitTemplate(ConnectionFactory connectionFactory, String exchange, String routingKey,
	                           String replyQueue, String replyAddress) {
		Assert.notNull(connectionFactory, "'connectionFactory' cannot be null");
		Assert.notNull(routingKey, "'routingKey' cannot be null");
		Assert.notNull(replyQueue, "'replyQueue' cannot be null");
		this.template = new RabbitTemplate(connectionFactory);
		this.template.setExchange(exchange == null ? "" : exchange);
		this.template.setRoutingKey(routingKey);
		this.container = new SimpleMessageListenerContainer(connectionFactory);
		this.container.setQueueNames(replyQueue);
		this.container.setMessageListener(this);
		this.container.afterPropertiesSet();
		if (replyAddress == null) {
			this.replyAddress = replyQueue;
		}
		else {
			this.replyAddress = replyAddress;
		}

	}

	/**
	 * Construct an instance using the provided arguments. The first queue the container
	 * is configured to listen to will be used as the reply queue. Replies will be
	 * routed using the default exchange with that queue name as the routing key.
	 * @param template a {@link RabbitTemplate}
	 * @param container a {@link SimpleMessageListenerContainer}.
	 */
	public AsyncRabbitTemplate(RabbitTemplate template, SimpleMessageListenerContainer container) {
		this(template, container, null);
	}

	/**
	 * Construct an instance using the provided arguments. The first queue the container
	 * is configured to listen to will be used as the reply queue. If 'replyAddress' is
	 * null, replies will be routed using the default exchange with that queue name as the
	 * routing key. Otherwise it should have the form exchange/routingKey and must
	 * cause messages to be routed to the reply queue.
	 * @param template a {@link RabbitTemplate}.
	 * @param container a {@link SimpleMessageListenerContainer}.
	 * @param replyAddress the reply address.
	 */
	public AsyncRabbitTemplate(RabbitTemplate template, SimpleMessageListenerContainer container, String replyAddress) {
		Assert.notNull(template, "'template' cannot be null");
		Assert.notNull(container, "'container' cannot be null");
		this.template = template;
		this.container = container;
		this.container.setMessageListener(this);
		if (replyAddress == null) {
			this.replyAddress = container.getQueueNames()[0];
		}
		else {
			this.replyAddress = replyAddress;
		}
	}

	/**
	 * @param autoStartup true for auto start.
	 * @see #isAutoStartup()
	 */
	public void setAutoStartup(boolean autoStartup) {
		this.autoStartup = autoStartup;
	}

	/**
	 * @param phase the phase.
	 * @see #getPhase()
	 */
	public void setPhase(int phase) {
		this.phase = phase;
	}

	/**
	 * Set to true to enable the receipt of returned messages that cannot be delivered
	 * in the form of a {@link AmqpMessageReturnedException}.
	 * @param mandatory true to enable returns.
	 */
	public void setMandatory(boolean mandatory) {
		if (mandatory) {
			this.template.setReturnCallback(this);
		}
		this.template.setMandatory(mandatory);
	}

	/**
	 * Set to true to enable publisher confirms. When enabled, the {@link RabbitFuture}
	 * returned by the send and receive operation will have a
	 * {@code ListenableFuture} in its {@code confirm} property.
	 * @param enableConfirms true to enable publisher confirms.
	 */
	public void setEnableConfirms(boolean enableConfirms) {
		this.enableConfirms = enableConfirms;
		if (enableConfirms) {
			this.template.setConfirmCallback(this);
		}
	}

	/**
	 * Set the charset to be used when converting byte[] to/from String for
	 * correlation Ids. Default: UTF-8.
	 * @param charset the charset.
	 * @deprecated - will be removed in 2.0 when byte[] correlation id is removed
	 */
	@Deprecated
	public void setCharset(Charset charset) {
		this.charset = charset;
	}

	public String getBeanName() {
		return this.beanName;
	}

	@Override
	public void setBeanName(String beanName) {
		this.beanName = beanName;
	}

	/**
	 * @return a reference to the underlying connection factory in the
	 * {@link RabbitTemplate}.
	 */
	public ConnectionFactory getConnectionFactory() {
		return this.template.getConnectionFactory();
	}

	/**
	 * Set the receive timeout - the future returned by the send and receive
	 * methods will be canceled when this timeout expires. {@code <= 0} means
	 * futures never expire. Beware that this will cause a memory leak if a
	 * reply is not received. Default: 30000 (30 seconds).
	 * @param receiveTimeout the timeout in milliseconds.
	 */
	public void setReceiveTimeout(long receiveTimeout) {
		this.receiveTimeout = receiveTimeout;
	}

	/**
	 * Set the task scheduler to expire timed out futures.
	 * @param taskScheduler the task scheduler
	 * @see #setReceiveTimeout(long)
	 */
	public synchronized void setTaskScheduler(TaskScheduler taskScheduler) {
		Assert.notNull(taskScheduler, "'taskScheduler' cannot be null");
		this.internalTaskScheduler = false;
		this.taskScheduler = taskScheduler;
	}

	/**
	 * @return a reference to the underlying {@link RabbitTemplate}'s
	 * {@link MessageConverter}.
	 */
	public MessageConverter getMessageConverter() {
		return this.template.getMessageConverter();
	}

	/**
	 * Send a message to the default exchange with the default routing key. If the message
	 * contains a correlationId property, it must be unique.
	 * @param message the message.
	 * @return the {@link RabbitMessageFuture}.
	 */
	public RabbitMessageFuture sendAndReceive(Message message) {
		return sendAndReceive(this.template.getExchange(), this.template.getRoutingKey(), message);
	}

	/**
	 * Send a message to the default exchange with the supplied routing key. If the message
	 * contains a correlationId property, it must be unique.
	 * @param routingKey the routing key.
	 * @param message the message.
	 * @return the {@link RabbitMessageFuture}.
	 */
	public RabbitMessageFuture sendAndReceive(String routingKey, Message message) {
		return sendAndReceive(this.template.getExchange(), routingKey, message);
	}

	/**
	 * Convert the object to a message and send it to the default exchange with the
	 * default routing key.
	 * @param message the message.
	 * @param  the expected result type.
	 * @return the {@link RabbitConverterFuture}.
	 */
	public  RabbitConverterFuture convertSendAndReceive(Object message) {
		return convertSendAndReceive(this.template.getExchange(), this.template.getRoutingKey(), message, null);
	}

	/**
	 * Convert the object to a message and send it to the default exchange with the
	 * provided routing key.
	 * @param routingKey the routing key.
	 * @param message the message.
	 * @param  the expected result type.
	 * @return the {@link RabbitConverterFuture}.
	 */
	public  RabbitConverterFuture convertSendAndReceive(String routingKey, Object message) throws AmqpException {
		return convertSendAndReceive(this.template.getExchange(), routingKey, message, null);
	}

	/**
	 * Convert the object to a message and send it to the provided exchange and
	 * routing key.
	 * @param exchange the exchange.
	 * @param routingKey the routing key.
	 * @param message the message.
	 * @param  the expected result type.
	 * @return the {@link RabbitConverterFuture}.
	 */
	public  RabbitConverterFuture convertSendAndReceive(String exchange, String routingKey, Object message) {
		return convertSendAndReceive(exchange, routingKey, message, null);
	}

	/**
	 * Convert the object to a message and send it to the default exchange with the
	 * default routing key after invoking the {@link MessagePostProcessor}.
	 * If the post processor adds a correlationId property, it must be unique.
	 * @param message the message.
	 * @param messagePostProcessor the post processor.
	 * @param  the expected result type.
	 * @return the {@link RabbitConverterFuture}.
	 */
	public  RabbitConverterFuture convertSendAndReceive(Object message,
	                                                          MessagePostProcessor messagePostProcessor) {
		return convertSendAndReceive(this.template.getExchange(), this.template.getRoutingKey(), message,
				messagePostProcessor);
	}

	/**
	 * Convert the object to a message and send it to the default exchange with the
	 * provided routing key after invoking the {@link MessagePostProcessor}.
	 * If the post processor adds a correlationId property, it must be unique.
	 * @param routingKey the routing key.
	 * @param message the message.
	 * @param messagePostProcessor the post processor.
	 * @param  the expected result type.
	 * @return the {@link RabbitConverterFuture}.
	 */
	public  RabbitConverterFuture convertSendAndReceive(String routingKey, Object message,
	                                                          MessagePostProcessor messagePostProcessor) {
		return convertSendAndReceive(this.template.getExchange(), routingKey, message, messagePostProcessor);
	}

	/**
	 * Send a message to the supplied exchange and routing key. If the message
	 * contains a correlationId property, it must be unique.
	 * @param exchange the exchange.
	 * @param routingKey the routing key.
	 * @param message the message.
	 * @return the {@link RabbitMessageFuture}.
	 */
	public RabbitMessageFuture sendAndReceive(String exchange, String routingKey, Message message) {
		String correlationId = getOrSetCorrelationIdAndSetReplyTo(message);
		RabbitMessageFuture future = new RabbitMessageFuture(correlationId, message);
		CorrelationData correlationData = null;
		if (this.enableConfirms) {
			correlationData = new CorrelationData(correlationId);
			future.setConfirm(new SettableListenableFuture());
		}
		this.pending.put(correlationId, future);
		this.template.send(exchange, routingKey, message, correlationData);
		return future;
	}

	/**
	 * Convert the object to a message and send it to the provided exchange and
	 * routing key after invoking the {@link MessagePostProcessor}.
	 * If the post processor adds a correlationId property, it must be unique.
	 * @param exchange the exchange
	 * @param routingKey the routing key.
	 * @param message the message.
	 * @param messagePostProcessor the post processor.
	 * @param  the expected result type.
	 * @return the {@link RabbitConverterFuture}.
	 */
	public  RabbitConverterFuture convertSendAndReceive(String exchange, String routingKey, Object message,
			MessagePostProcessor messagePostProcessor) {
		AsyncCorrelationData correlationData = new AsyncCorrelationData(messagePostProcessor,
				this.enableConfirms);
		this.template.convertAndSend(exchange, routingKey, message, this.messagePostProcessor, correlationData);
		return correlationData.future;
	}

	@Override
	public synchronized void start() {
		if (!this.running) {
			if (this.internalTaskScheduler) {
				ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
				scheduler.setThreadNamePrefix(getBeanName() == null ? "asyncTemplate-" : (getBeanName() + "-"));
				scheduler.afterPropertiesSet();
				this.taskScheduler = scheduler;
			}
			this.container.start();
		}
		this.running = true;
	}

	@Override
	public synchronized void stop() {
		if (this.running) {
			this.container.stop();
			for (RabbitFuture future : this.pending.values()) {
				future.setNackCause("AsyncRabbitTemplate was stopped while waiting for reply");
				future.cancel(true);
			}
		}
		if (this.internalTaskScheduler) {
			((ThreadPoolTaskScheduler) this.taskScheduler).destroy();
			this.taskScheduler = null;
		}
		this.running = false;
	}

	@Override
	public boolean isRunning() {
		return this.running;
	}

	@Override
	public int getPhase() {
		return this.phase;
	}

	@Override
	public boolean isAutoStartup() {
		return this.autoStartup;
	}

	@Override
	public void stop(Runnable callback) {
		stop();
		callback.run();
	}

	@SuppressWarnings("unchecked")
	@Override
	public void onMessage(Message message) {
		MessageProperties messageProperties = message.getMessageProperties();
		if (messageProperties != null) {
			@SuppressWarnings("deprecation")
			byte[] correlationId = messageProperties.getCorrelationId();
			if (correlationId != null) {
				if (this.logger.isDebugEnabled()) {
					this.logger.debug("onMessage: " + message);
				}
				RabbitFuture future = this.pending.remove(new String(correlationId, this.charset));
				if (future != null) {
					if (future instanceof AsyncRabbitTemplate.RabbitConverterFuture) {
						Object converted = this.template.getMessageConverter().fromMessage(message);
						((RabbitConverterFuture) future).set(converted);
					}
					else {
						((RabbitMessageFuture) future).set(message);
					}
				}
				else {
					if (this.logger.isWarnEnabled()) {
						this.logger.warn("No pending reply - perhaps timed out: " + message);
					}
				}
			}
		}
	}

	@Override
	public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {
		MessageProperties messageProperties = message.getMessageProperties();
		@SuppressWarnings("deprecation")
		byte[] correlationId = messageProperties.getCorrelationId();
		if (correlationId != null) {
			RabbitFuture future = this.pending.remove(new String(correlationId, this.charset));
			if (future != null) {
				future.setException(new AmqpMessageReturnedException("Message returned", message, replyCode, replyText,
						exchange, routingKey));
			}
		}
	}

	@Override
	public void confirm(CorrelationData correlationData, boolean ack, String cause) {
		if (this.logger.isDebugEnabled()) {
			this.logger.debug("Confirm: " + correlationData + ", ack=" + ack
					+ (cause == null ? "" : (", cause: " + cause)));
		}
		String correlationId = correlationData.getId();
		if (correlationId != null) {
			RabbitFuture future = this.pending.get(correlationId);
			if (future != null) {
				future.setNackCause(cause);
				((SettableListenableFuture) future.getConfirm()).set(ack);
			}
			else {
				if (this.logger.isDebugEnabled()) {
					this.logger.debug("Confirm: " + correlationData + ", ack=" + ack
							+ (cause == null ? "" : (", cause: " + cause))
							+ " no pending future - either canceled or the reply is already received");
				}
			}
		}
	}

	@SuppressWarnings("deprecation")
	private String getOrSetCorrelationIdAndSetReplyTo(Message message) {
		String correlationId;
		MessageProperties messageProperties = message.getMessageProperties();
		Assert.notNull(messageProperties, "the message properties cannot be null");
		byte[] currentCorrelationId = messageProperties.getCorrelationId();
		if (currentCorrelationId == null) {
			correlationId = UUID.randomUUID().toString();
			messageProperties.setCorrelationId(correlationId.getBytes(this.charset));
			Assert.isNull(messageProperties.getReplyTo(), "'replyTo' property must be null");
		}
		else {
			correlationId = new String(currentCorrelationId, this.charset);
		}
		messageProperties.setReplyTo(this.replyAddress);
		return correlationId;
	}

	@Override
	public String toString() {
		return this.beanName == null ? super.toString() : (this.getClass().getSimpleName() + ": " + this.beanName);
	}

	/**
	 * Base class for {@link ListenableFuture}s returned by {@link AsyncRabbitTemplate}.
	 * @since 1.6
	 */
	public abstract class RabbitFuture extends SettableListenableFuture {

		private final String correlationId;

		private final Message requestMessage;

		private final ScheduledFuture cancelTask;

		private volatile ListenableFuture confirm;

		private String nackCause;

		public RabbitFuture(String correlationId, Message requestMessage) {
			this.correlationId = correlationId;
			this.requestMessage = requestMessage;
			if (AsyncRabbitTemplate.this.receiveTimeout > 0) {
				synchronized (AsyncRabbitTemplate.this) {
					if (!AsyncRabbitTemplate.this.running) {
						AsyncRabbitTemplate.this.pending.remove(this.correlationId);
						throw new IllegalStateException("'AsyncRabbitTemplate' must be started.");
					}
					this.cancelTask = AsyncRabbitTemplate.this.taskScheduler.schedule(new CancelTask(),
							new Date(System.currentTimeMillis() + AsyncRabbitTemplate.this.receiveTimeout));
				}
			}
			else {
				this.cancelTask = null;
			}
		}

		@Override
		public boolean cancel(boolean mayInterruptIfRunning) {
			if (this.cancelTask != null) {
				this.cancelTask.cancel(true);
			}
			AsyncRabbitTemplate.this.pending.remove(this.correlationId);
			return super.cancel(mayInterruptIfRunning);
		}

		/**
		 * When confirms are enabled contains a {@link ListenableFuture}
		 * for the confirmation.
		 * @return the future.
		 */
		public ListenableFuture getConfirm() {
			return this.confirm;
		}

		void setConfirm(ListenableFuture confirm) {
			this.confirm = confirm;
		}

		/**
		 * When confirms are enabled and a nack is received, contains
		 * the cause for the nack, if any.
		 * @return the cause.
		 */
		public String getNackCause() {
			return this.nackCause;
		}

		void setNackCause(String nackCause) {
			this.nackCause = nackCause;
		}

		private class CancelTask implements Runnable {

			@Override
			public void run() {
				AsyncRabbitTemplate.this.pending.remove(RabbitFuture.this.correlationId);
				setException(new AmqpReplyTimeoutException("Reply timed out", RabbitFuture.this.requestMessage));
			}

		}

	}

	/**
	 * A {@link RabbitFuture} with a return type of {@link Message}.
	 * @since 1.6
	 */
	public class RabbitMessageFuture extends RabbitFuture {

		public RabbitMessageFuture(String correlationId, Message requestMessage) {
			super(correlationId, requestMessage);
		}

	}

	/**
	 * A {@link RabbitFuture} with a return type of the template's
	 * generic parameter.
	 * @since 1.6
	 */
	public class RabbitConverterFuture extends RabbitFuture {

		public RabbitConverterFuture(String correlationId, Message requestMessage) {
			super(correlationId, requestMessage);
		}

	}

	private final class CorrelationMessagePostProcessor implements CorrelationAwareMessagePostProcessor {

		CorrelationMessagePostProcessor() {
			super();
		}

		@Override
		public Message postProcessMessage(Message message) throws AmqpException {
			throw new UnsupportedOperationException();
		}

		@SuppressWarnings("unchecked")
		@Override
		public Message postProcessMessage(Message message, Correlation correlation) throws AmqpException {
			Message messageToSend = message;
			AsyncCorrelationData correlationData = (AsyncCorrelationData) correlation;
			if (correlationData.userPostProcessor != null) {
				messageToSend = correlationData.userPostProcessor.postProcessMessage(message);
			}
			String correlationId = getOrSetCorrelationIdAndSetReplyTo(messageToSend);
			correlationData.future = new RabbitConverterFuture(correlationId, message);
			if (correlationData.enableConfirms && correlationData.getId() == null) {
				correlationData.setId(correlationId);
				correlationData.future.setConfirm(new SettableListenableFuture());
			}
			AsyncRabbitTemplate.this.pending.put(correlationId, correlationData.future);
			return messageToSend;
		}

	}

	private static class AsyncCorrelationData extends CorrelationData {

		private final MessagePostProcessor userPostProcessor;

		private final boolean enableConfirms;

		private volatile RabbitConverterFuture future;

		AsyncCorrelationData(MessagePostProcessor userPostProcessor, boolean enableConfirms) {
			this.userPostProcessor = userPostProcessor;
			this.enableConfirms = enableConfirms;
		}

	}

}
 















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