/// <summary>
/// Gets the body.
/// </summary>
/// <param name="serializedMessage">The serialized message.</param>
/// <returns>The message body as an <see cref="Object"/></returns>
public static object GetBody(this SerializableMessage serializedMessage)
{
if (serializedMessage == null)
{
throw new ArgumentNullException("serializedMessage");
}
lock (serializedMessage)
{
// create an instance of the message formatter supplied in the serialized message.
IMessageFormatter messageFormatter = (IMessageFormatter)Activator.CreateInstance(serializedMessage.FormatterType);
// now use that formatter to read the message.
using (MemoryStream memoryStream = new MemoryStream(serializedMessage.MessageData))
{
using (Message message = new Message())
{
message.BodyStream = memoryStream;
if (messageFormatter.CanRead(message))
{
return(messageFormatter.Read(message));
}
}
}
return(null);
}
}
/// <summary>
/// Reads a message. Decomress and then applies the base formatter
/// </summary>
/// <param name="message">The message to be read</param>
/// <returns>The result object - goes to the message Body</returns>
public object Read(Message message)
{
long bodyLength = message.BodyStream.Length;
OriginalBodyLength = bodyLength;
CompressedBodyLength = bodyLength;
if (bodyLength < MessageHeader.Length)
{
return(m_BaseFormatter.Read(message)); // Message appeared to be uncompressed
}
MessageHeader messageHeader = new MessageHeader(message.BodyStream);
if (!messageHeader.PrefixIsValid)
{
message.BodyStream.Position = 0;
return(m_BaseFormatter.Read(message)); // Message appeared to be uncompressed
}
OriginalBodyLength = messageHeader.UncompressedBodyLength;
using (MemoryStream decompressedBodyMemoryStream = new MemoryStream())
{
DeflateStream decompressor = new DeflateStream(message.BodyStream, CompressionMode.Decompress);
decompressor.CopyTo(decompressedBodyMemoryStream);
decompressor.Close();
// Create a "clear" message and apply the base format to it
Message clearMessage = new Message();
clearMessage.BodyType = message.BodyType;
clearMessage.BodyStream = decompressedBodyMemoryStream;
clearMessage.BodyStream.Position = 0;
return(m_BaseFormatter.Read(clearMessage));
}
}
private void PollForMessages(Action <IMessageContext <T> > messageHandler)
{
while (_isSubscribed)
{
var message = ReadMessageFromQueue();
if (message != null)
{
var body = _messageFormatter.Read <T>(message.Body);
var context = new AmazonSqsMessageContext <T>(_client, message, _uri)
{
Message = body
};
messageHandler(context);
}
}
}
private void PollForMessages(IModel channel, Action <IMessageContext <T> > messageHandler, QueueingBasicConsumer consumer)
{
while (_isSubscribed)
{
try
{
var message = (RabbitMQ.Client.Events.BasicDeliverEventArgs)consumer.Queue.Dequeue();
var context = new RabbitMqMessageContext <T>(channel, message.DeliveryTag);
context.Message = _messageFormatter.Read <T>(message.Body);
messageHandler(context);
}
catch (OperationInterruptedException)
{
}
}
}
