private Message<?> sendAndReceive(
String exchangeName,
String routingKey,
Message<?> requestMessage,
CorrelationData correlationData) {
Assert.isInstanceOf(
RabbitTemplate.class,
this.amqpTemplate,
"RabbitTemplate implementation is required for publisher confirms");
MessageConverter converter = ((RabbitTemplate) this.amqpTemplate).getMessageConverter();
MessageProperties amqpMessageProperties = new MessageProperties();
org.springframework.amqp.core.Message amqpMessage =
converter.toMessage(requestMessage.getPayload(), amqpMessageProperties);
this.headerMapper.fromHeadersToRequest(requestMessage.getHeaders(), amqpMessageProperties);
checkDeliveryMode(requestMessage, amqpMessageProperties);
org.springframework.amqp.core.Message amqpReplyMessage =
((RabbitTemplate) this.amqpTemplate)
.sendAndReceive(exchangeName, routingKey, amqpMessage, correlationData);
if (amqpReplyMessage == null) {
return null;
}
Object replyObject = converter.fromMessage(amqpReplyMessage);
AbstractIntegrationMessageBuilder<?> builder =
(replyObject instanceof Message)
? this.getMessageBuilderFactory().fromMessage((Message<?>) replyObject)
: this.getMessageBuilderFactory().withPayload(replyObject);
Map<String, ?> headers =
this.headerMapper.toHeadersFromReply(amqpReplyMessage.getMessageProperties());
builder.copyHeadersIfAbsent(headers);
return builder.build();
}
/**
* Build a Rabbit message to be sent as response based on the given result object.
*
* @param channel the Rabbit Channel to operate on
* @param result the content of the message, as returned from the listener method
* @return the Rabbit <code>Message</code> (never <code>null</code>)
* @throws Exception if thrown by Rabbit API methods
* @see #setMessageConverter
*/
@Override
protected org.springframework.amqp.core.Message buildMessage(Channel channel, Object result)
throws Exception {
MessageConverter converter = getMessageConverter();
if (converter != null && !(result instanceof org.springframework.amqp.core.Message)) {
if (result instanceof org.springframework.messaging.Message) {
return this.messagingMessageConverter.toMessage(result, new MessageProperties());
} else {
return converter.toMessage(result, new MessageProperties());
}
} else {
if (!(result instanceof org.springframework.amqp.core.Message)) {
throw new MessageConversionException(
"No MessageConverter specified - cannot handle message [" + result + "]");
}
return (org.springframework.amqp.core.Message) result;
}
}
@Override
public void returnedMessage(
org.springframework.amqp.core.Message message,
int replyCode,
String replyText,
String exchange,
String routingKey) {
// safe to cast; we asserted we have a RabbitTemplate in doInit()
MessageConverter converter = ((RabbitTemplate) this.amqpTemplate).getMessageConverter();
Object returnedObject = converter.fromMessage(message);
AbstractIntegrationMessageBuilder<?> builder =
(returnedObject instanceof Message)
? this.getMessageBuilderFactory().fromMessage((Message<?>) returnedObject)
: this.getMessageBuilderFactory().withPayload(returnedObject);
Map<String, ?> headers = this.headerMapper.toHeadersFromReply(message.getMessageProperties());
builder
.copyHeadersIfAbsent(headers)
.setHeader(AmqpHeaders.RETURN_REPLY_CODE, replyCode)
.setHeader(AmqpHeaders.RETURN_REPLY_TEXT, replyText)
.setHeader(AmqpHeaders.RETURN_EXCHANGE, exchange)
.setHeader(AmqpHeaders.RETURN_ROUTING_KEY, routingKey);
this.returnChannel.send(builder.build());
}