public void EtpExtensions_CreateMessageKey_Creates_Core_Key()
{
long expectedKey, actualKey;
expectedKey = 1L;
actualKey = EtpExtensions.CreateMessageKey((int)v11.Protocols.Core, (int)v11.MessageTypes.Core.RequestSession);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1L;
actualKey = EtpExtensions.CreateMessageKey((int)v12.Protocols.Core, (int)v12.MessageTypes.Core.RequestSession);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1000L;
actualKey = EtpExtensions.CreateMessageKey((int)v11.Protocols.Core, (int)v11.MessageTypes.Core.ProtocolException);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1000L;
actualKey = EtpExtensions.CreateMessageKey((int)v12.Protocols.Core, (int)v12.MessageTypes.Core.ProtocolException);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1001L;
actualKey = EtpExtensions.CreateMessageKey((int)v11.Protocols.Core, (int)v11.MessageTypes.Core.Acknowledge);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1001L;
actualKey = EtpExtensions.CreateMessageKey((int)v12.Protocols.Core, (int)v12.MessageTypes.Core.Acknowledge);
Assert.AreEqual(expectedKey, actualKey);
}
/// <summary>
/// Overrides an existing message decoder so that it can return a generic interface.
/// </summary>
/// <typeparam name="TInterface">The type of the message body interface.</typeparam>
/// <typeparam name="TBody">The type of the decoded message.</typeparam>
/// <param name="protocol"></param>
/// <param name="messageType"></param>
protected void RegisterMessageDecoderOverride <TInterface, TBody>(object protocol, object messageType) where TInterface : IEtpMessageBody where TBody : class, TInterface, new()
{
var messageKey = EtpExtensions.CreateMessageKey(Convert.ToInt32(protocol), Convert.ToInt32(messageType));
MessageDecoders[messageKey] = (d, h, x) => CreateMessage <TInterface, TBody>(h, d.DecodeAvroObject <TBody>(), extension: x);
MessageDecodersByType[typeof(TInterface)] = MessageDecoders[messageKey];
}
public void EtpExtensions_CreateMessageKey_Creates_Discovery_Key()
{
long expectedKey, actualKey;
expectedKey = (3L << 32) + 1;
actualKey = EtpExtensions.CreateMessageKey((int)v11.Protocols.Discovery, (int)v11.MessageTypes.Discovery.GetResources);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = (3L << 32) + 1;
actualKey = EtpExtensions.CreateMessageKey((int)v12.Protocols.Discovery, (int)v12.MessageTypes.Discovery.GetResources);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1000L;
actualKey = EtpExtensions.CreateMessageKey((int)v11.Protocols.Discovery, (int)v11.MessageTypes.Core.ProtocolException);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1000L;
actualKey = EtpExtensions.CreateMessageKey((int)v12.Protocols.Discovery, (int)v12.MessageTypes.Core.ProtocolException);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1001L;
actualKey = EtpExtensions.CreateMessageKey((int)v11.Protocols.Discovery, (int)v11.MessageTypes.Core.Acknowledge);
Assert.AreEqual(expectedKey, actualKey);
expectedKey = 1001L;
actualKey = EtpExtensions.CreateMessageKey((int)v12.Protocols.Discovery, (int)v12.MessageTypes.Core.Acknowledge);
Assert.AreEqual(expectedKey, actualKey);
}
/// <summary>
/// Logs the specified message header and body.
/// </summary>
/// <typeparam name="T">The type of the message.</typeparam>
/// <param name="header">The message header.</param>
/// <param name="message">The message body.</param>
protected void Received <T>(IMessageHeader header, T message)
{
if (Session?.Output == null)
{
return;
}
Session.Log("[{0}] Message received at {1}", Session.SessionId, DateTime.Now.ToString(TimestampFormat));
Session.Log(EtpExtensions.Serialize(header));
Session.Log(EtpExtensions.Serialize(message, true));
}
/// <summary>
/// Handles the message.
/// </summary>
/// <param name="header">The header.</param>
/// <param name="decoder">The decoder.</param>
/// <param name="body">The body.</param>
protected void HandleMessage(IMessageHeader header, Decoder decoder, string body)
{
try
{
IProtocolHandler handler;
_handlersLock.TryEnterReadLock(-1);
HandlersByProtocol.TryGetValue(header.Protocol, out handler);
if (handler == null)
{
HandlersByProtocol.TryGetValue((int)v11.Protocols.Core, out handler);
if (handler == null) // Socket has been closed
{
Logger.Trace($"Ignoring message on closed session: {EtpExtensions.Serialize(header)}");
return;
}
var msg = $"Protocol handler not registered for protocol { header.Protocol }.";
handler.ProtocolException((int)EtpErrorCodes.UnsupportedProtocol, msg, header.MessageId);
return;
}
var message = Adapter.DecodeMessage(header.Protocol, header.MessageType, decoder, body);
if (message == null)
{
handler.InvalidMessage(header);
return;
}
Received(header, message);
try
{
// Handle global Acknowledge request
if (header.IsAcknowledgeRequested())
{
handler.Acknowledge(header.MessageId);
}
handler.HandleMessage(header, message);
}
catch (Exception ex)
{
Logger.Debug(ex);
handler.ProtocolException((int)EtpErrorCodes.InvalidState, ex.Message, header.MessageId);
}
}
finally
{
_handlersLock.ExitReadLock();
}
}
/// <summary>
/// Registers a function that decodes a particular message type.
/// </summary>
/// <typeparam name="T">The type of the decoded message.</typeparam>
/// <param name="protocol">The message's protocol.</param>
/// <param name="messageType">The type of the message.</param>
/// <exception cref="ArgumentException">More than one decoder for the same protocol message is added.</exception>
public void RegisterMessageDecoder <T>(object protocol, object messageType) where T : class, IEtpMessageBody, new()
{
var messageKey = EtpExtensions.CreateMessageKey(Convert.ToInt32(protocol), Convert.ToInt32(messageType));
if (MessageDecoders.ContainsKey(messageKey))
{
throw new ArgumentException($"Duplicate decoder: Protocol: {protocol}; Message Type: {messageType}", "messageType");
}
RegisterMessageDecoderOverride <T, T>(protocol, messageType);
}
/// <summary>
/// Registers a function that decodes a particular message type.
/// </summary>
/// <typeparam name="T">The type of the decoded message.</typeparam>
/// <param name="protocol">The message's protocol.</param>
/// <param name="messageType">The type of the message.</param>
/// <exception cref="ArgumentException">More than one decoder for the same protocol message is added.</exception>
public void RegisterMessageDecoder <T>(object protocol, object messageType) where T : ISpecificRecord
{
var messageKey = EtpExtensions.CreateMessageKey(Convert.ToInt32(protocol), Convert.ToInt32(messageType));
if (MessageDecoders.ContainsKey(messageKey))
{
throw new ArgumentException($"Duplicate decoder: Protocol: {protocol}; Message Type: {messageType}", "messageType");
}
MessageDecoders[messageKey] = (d, b) => EtpExtensions.Decode <T>(d, b);
MessageDecodersByType[typeof(T)] = MessageDecoders[messageKey];
}
/// <summary>
/// Decodes the message.
/// </summary>
/// <param name="header">The message header</param>
/// <param name="extension">The header extension</param>
/// <param name="decoder">The decoder with binary message data.</param>
/// <returns>The message if successful; <c>null</c> otherwise.</returns>
public EtpMessage DecodeMessage(IMessageHeader header, IMessageHeaderExtension extension, IAvroDecoder decoder)
{
var messageKey = EtpExtensions.CreateMessageKey(header.Protocol, header.MessageType);
Func <IAvroDecoder, IMessageHeader, IMessageHeaderExtension, EtpMessage> messageDecoder;
if (!MessageDecoders.TryGetValue(messageKey, out messageDecoder))
{
return(null);
}
return(messageDecoder(decoder, header, extension));
}
/// <summary>
/// Decodes the message type from the specified protocol.
/// </summary>
/// <param name="protocol">The message's protocol.</param>
/// <param name="messageType">The type of the message.</param>
/// <param name="decoder">The decoder with binary message data.</param>
/// <param name="body">The string with json message data.</param>
/// <returns>The message.</returns>
public ISpecificRecord DecodeMessage(int protocol, int messageType, Decoder decoder, string body)
{
var messageKey = EtpExtensions.CreateMessageKey(protocol, messageType);
Func <Decoder, string, ISpecificRecord> messageDecoder;
if (!MessageDecoders.TryGetValue(messageKey, out messageDecoder))
{
return(null);
}
return(messageDecoder(decoder, body));
}
/// <summary>
/// Asynchronously sends the message.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="header">The header.</param>
/// <param name="body">The body.</param>
/// <param name="onBeforeSend">Action called just before sending the message with the actual header having the definitive message ID.</param>
/// <returns>The message identifier.</returns>
public async Task <long> SendMessageAsync <T>(IMessageHeader header, T body, Action <IMessageHeader> onBeforeSend = null) where T : ISpecificRecord
{
// Lock to ensure only one thread at a time attempts to send data and to ensure that messages are sent with sequential IDs
try
{
try
{
await _sendLock.WaitAsync().ConfigureAwait(CaptureAsyncContext);
if (!IsOpen)
{
Log("Warning: Sending on a session that is not open.");
Logger.Debug("Sending on a session that is not open.");
return(-1);
}
header.MessageId = NewMessageId();
// Call the pre-send action in case any deterministic handling is needed with the actual message ID.
// Must be invoked before sending to ensure the response is not asynchronously processed before this method returns.
onBeforeSend?.Invoke(header);
// Log message just before it gets sent if needed.
Sending(header, body);
if (IsJsonEncoding)
{
var message = EtpExtensions.Serialize(new object[] { header, body });
await SendAsync(message).ConfigureAwait(CaptureAsyncContext);
}
else
{
var data = body.Encode(header, SupportedCompression);
await SendAsync(data, 0, data.Length).ConfigureAwait(CaptureAsyncContext);
}
}
finally
{
_sendLock.Release();
}
}
catch (Exception ex)
{
// Handler already locked by the calling code...
return(Handler(header.Protocol)
.ProtocolException((int)EtpErrorCodes.InvalidState, ex.Message, header.MessageId));
}
return(header.MessageId);
}
/// <summary>
/// Logs the specified message header and body.
/// </summary>
/// <param name="header">The message header.</param>
/// <param name="message">The message body.</param>
protected void Received(IMessageHeader header, ISpecificRecord message)
{
var now = DateTime.Now;
if (Output != null)
{
Log("[{0}] Message received at {1}", SessionId, now.ToString(TimestampFormat));
Log(EtpExtensions.Serialize(header));
Log(EtpExtensions.Serialize(message, true));
}
if (Logger.IsVerboseEnabled())
{
Logger.VerboseFormat("[{0}] Message received at {1}: {2}{3}{4}",
SessionId, now.ToString(TimestampFormat), EtpExtensions.Serialize(header), Environment.NewLine, EtpExtensions.Serialize(message, true));
}
}
/// <summary>
/// Logs the specified header and message body.
/// </summary>
/// <typeparam name="T">The type of message.</typeparam>
/// <param name="header">The header.</param>
/// <param name="body">The message body.</param>
protected void Sending <T>(IMessageHeader header, T body)
{
var now = DateTime.Now;
if (Output != null)
{
Log("[{0}] Sending message at {1}", SessionId, now.ToString(TimestampFormat));
Log(EtpExtensions.Serialize(header));
Log(EtpExtensions.Serialize(body, true));
}
if (Logger.IsVerboseEnabled())
{
Logger.VerboseFormat("[{0}] Sending message at {1}: {2}{3}{4}",
SessionId, now.ToString(TimestampFormat), EtpExtensions.Serialize(header), Environment.NewLine, EtpExtensions.Serialize(body, true));
}
}
/// <summary>
/// Invokes the message handler for the specified message type.
/// </summary>
/// <param name="header">The message header.</param>
/// <param name="body">The message body.</param>
/// <returns><c>true</c> if a handler for the message was invoked; <c>false</c> otherwise.</returns>
public bool InvokeMessageHandler(IMessageHeader header, ISpecificRecord body)
{
if (header == null)
{
return(false);
}
var messageKey = EtpExtensions.CreateMessageKey(header.Protocol, header.MessageType);
Action <IMessageHeader, ISpecificRecord> messageHandler;
if (!MessageHandlers.TryGetValue(messageKey, out messageHandler))
{
return(false);
}
messageHandler(header, body);
return(true);
}
public void EtpExtensions_Encode_And_Decode_Can_Round_Trip()
{
var expectedVersion = new v11.Datatypes.Version {
Major = 1, Minor = 2, Revision = 3, Patch = 4
};
var bytes = expectedVersion.EncodeToBytes();
var actualVersion = EtpExtensions.DecodeFromBytes <v11.Datatypes.Version>(bytes);
Assert.AreEqual(expectedVersion.Major, actualVersion.Major, nameof(expectedVersion.Major));
Assert.AreEqual(expectedVersion.Minor, actualVersion.Minor, nameof(expectedVersion.Minor));
Assert.AreEqual(expectedVersion.Revision, actualVersion.Revision, nameof(expectedVersion.Revision));
Assert.AreEqual(expectedVersion.Patch, actualVersion.Patch, nameof(expectedVersion.Patch));
var expectedValue = new v11.Datatypes.DataValue {
Item = 1
};
bytes = expectedValue.EncodeToBytes();
var actualValue = EtpExtensions.DecodeFromBytes <v11.Datatypes.DataValue>(bytes);
Assert.AreEqual(expectedValue.Item, actualValue.Item, nameof(expectedValue.Item));
expectedValue = new v11.Datatypes.DataValue {
Item = 1.2
};
bytes = expectedValue.EncodeToBytes();
actualValue = EtpExtensions.DecodeFromBytes <v11.Datatypes.DataValue>(bytes);
Assert.AreEqual(expectedValue.Item, actualValue.Item, nameof(expectedValue.Item));
expectedValue = new v11.Datatypes.DataValue {
Item = "test"
};
bytes = expectedValue.EncodeToBytes();
actualValue = EtpExtensions.DecodeFromBytes <v11.Datatypes.DataValue>(bytes);
Assert.AreEqual(expectedValue.Item, actualValue.Item, nameof(expectedValue.Item));
var expectedProtocol = new v11.Datatypes.SupportedProtocol {
Protocol = 1, ProtocolVersion = expectedVersion, ProtocolCapabilities = new Dictionary <string, v11.Datatypes.DataValue> {
["test"] = expectedValue
}, Role = "store"
};
bytes = expectedProtocol.EncodeToBytes();
var actualProtocol = EtpExtensions.DecodeFromBytes <v11.Datatypes.SupportedProtocol>(bytes);
Assert.AreEqual(expectedProtocol.Protocol, actualProtocol.Protocol, nameof(expectedProtocol.Protocol));
Assert.AreEqual(expectedProtocol.ProtocolVersion.Major, actualProtocol.ProtocolVersion.Major, nameof(expectedProtocol.ProtocolVersion.Major));
Assert.AreEqual(expectedProtocol.ProtocolVersion.Minor, actualProtocol.ProtocolVersion.Minor, nameof(expectedProtocol.ProtocolVersion.Minor));
Assert.AreEqual(expectedProtocol.ProtocolVersion.Revision, actualProtocol.ProtocolVersion.Revision, nameof(expectedProtocol.ProtocolVersion.Revision));
Assert.AreEqual(expectedProtocol.ProtocolVersion.Patch, actualProtocol.ProtocolVersion.Patch, nameof(expectedProtocol.ProtocolVersion.Patch));
Assert.AreEqual(expectedProtocol.Role, actualProtocol.Role, nameof(expectedProtocol.Role));
Assert.AreEqual(1, actualProtocol.ProtocolCapabilities.Count, nameof(expectedProtocol.ProtocolCapabilities.Count));
Assert.AreEqual(expectedValue.Item, actualProtocol.ProtocolCapabilities["test"].Item);
var expectedRequestSession = new v11.Protocol.Core.RequestSession
{
ApplicationName = "Application",
ApplicationVersion = "Version",
RequestedProtocols = new List <v11.Datatypes.SupportedProtocol> {
expectedProtocol
},
SupportedObjects = new List <string> {
"object"
},
};
bytes = expectedRequestSession.EncodeToBytes();
var actualRequestSession = EtpExtensions.DecodeFromBytes <v11.Protocol.Core.RequestSession>(bytes);
Assert.AreEqual(expectedRequestSession.ApplicationName, actualRequestSession.ApplicationName, nameof(expectedRequestSession.ApplicationName));
Assert.AreEqual(expectedRequestSession.ApplicationVersion, actualRequestSession.ApplicationVersion, nameof(expectedRequestSession.ApplicationVersion));
Assert.AreEqual(expectedRequestSession.RequestedProtocols.Count, actualRequestSession.RequestedProtocols.Count, nameof(expectedRequestSession.RequestedProtocols.Count));
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].Protocol, actualRequestSession.RequestedProtocols[0].Protocol);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Major, actualRequestSession.RequestedProtocols[0].ProtocolVersion.Major);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Minor, actualRequestSession.RequestedProtocols[0].ProtocolVersion.Minor);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Revision, actualRequestSession.RequestedProtocols[0].ProtocolVersion.Revision);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Patch, actualRequestSession.RequestedProtocols[0].ProtocolVersion.Patch);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].Role, actualRequestSession.RequestedProtocols[0].Role);
Assert.AreEqual(1, actualRequestSession.RequestedProtocols[0].ProtocolCapabilities.Count);
Assert.AreEqual(expectedValue.Item, actualProtocol.ProtocolCapabilities["test"].Item);
Assert.AreEqual(expectedRequestSession.SupportedObjects.Count, actualRequestSession.SupportedObjects.Count, nameof(expectedRequestSession.SupportedObjects.Count));
Assert.AreEqual(expectedRequestSession.SupportedObjects[0], actualRequestSession.SupportedObjects[0]);
var expectedHeader = new v11.Datatypes.MessageHeader {
MessageFlags = 0, Protocol = 1, MessageId = 2, CorrelationId = 3, MessageType = 4
};
var expectedMessage = new EtpMessage <v11.Protocol.Core.RequestSession>(expectedHeader, expectedRequestSession);
bytes = expectedMessage.Encode();
using (var inputStream = new MemoryStream(bytes))
using (var decoder = new BinaryAvroDecoder(inputStream))
{
var actualHeader = decoder.DecodeAvroObject <v11.Datatypes.MessageHeader>();
var actualBody = decoder.DecodeAvroObject <v11.Protocol.Core.RequestSession>();
Assert.AreEqual(expectedHeader.MessageFlags, actualHeader.MessageFlags, nameof(expectedHeader.MessageFlags));
Assert.AreEqual(expectedHeader.Protocol, actualHeader.Protocol, nameof(expectedHeader.Protocol));
Assert.AreEqual(expectedHeader.MessageId, actualHeader.MessageId, nameof(expectedHeader.MessageId));
Assert.AreEqual(expectedHeader.CorrelationId, actualHeader.CorrelationId, nameof(expectedHeader.CorrelationId));
Assert.AreEqual(expectedHeader.MessageType, actualHeader.MessageType, nameof(expectedHeader.MessageType));
Assert.AreEqual(expectedRequestSession.ApplicationName, actualBody.ApplicationName, nameof(expectedRequestSession.ApplicationName));
Assert.AreEqual(expectedRequestSession.ApplicationVersion, actualBody.ApplicationVersion, nameof(expectedRequestSession.ApplicationVersion));
Assert.AreEqual(expectedRequestSession.RequestedProtocols.Count, actualBody.RequestedProtocols.Count, nameof(expectedRequestSession.RequestedProtocols.Count));
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].Protocol, actualBody.RequestedProtocols[0].Protocol);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Major, actualBody.RequestedProtocols[0].ProtocolVersion.Major);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Minor, actualBody.RequestedProtocols[0].ProtocolVersion.Minor);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Revision, actualBody.RequestedProtocols[0].ProtocolVersion.Revision);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].ProtocolVersion.Patch, actualBody.RequestedProtocols[0].ProtocolVersion.Patch);
Assert.AreEqual(expectedRequestSession.RequestedProtocols[0].Role, actualBody.RequestedProtocols[0].Role);
Assert.AreEqual(1, actualBody.RequestedProtocols[0].ProtocolCapabilities.Count);
Assert.AreEqual(expectedValue.Item, actualProtocol.ProtocolCapabilities["test"].Item);
Assert.AreEqual(expectedRequestSession.SupportedObjects.Count, actualBody.SupportedObjects.Count, nameof(expectedRequestSession.SupportedObjects.Count));
Assert.AreEqual(expectedRequestSession.SupportedObjects[0], actualBody.SupportedObjects[0]);
}
}
/// <summary>
/// Decodes the specified data.
/// </summary>
/// <param name="data">The data.</param>
protected void Decode(byte[] data)
{
using (var inputStream = new MemoryStream(data))
{
// create avro binary decoder to read from memory stream
var decoder = new BinaryDecoder(inputStream);
// deserialize the header
var header = Adapter.DecodeMessageHeader(decoder, null);
// log message metadata
if (Logger.IsVerboseEnabled())
{
Logger.VerboseFormat("[{0}] Binary message received: {1}", SessionId, EtpExtensions.Serialize(header));
}
Stream gzip = null;
try
{
// decompress message body if compression has been negotiated
if (header.CanCompressMessageBody(true))
{
if (EtpExtensions.GzipEncoding.Equals(SupportedCompression, StringComparison.InvariantCultureIgnoreCase))
{
gzip = new GZipStream(inputStream, CompressionMode.Decompress, true);
decoder = new BinaryDecoder(gzip);
}
}
// call processing action
HandleMessage(header, decoder, null);
}
finally
{
gzip?.Dispose();
}
}
}
/// <summary>
/// Checks whether a decoder is registered for the specified protocol message.
/// </summary>
/// <param name="protocol">The message protocol.</param>
/// <param name="messageType">The message type.</param>
/// <returns><c>true</c> if there is a message decoder registered; <c>false</c> otherwise.</returns>
public bool IsMessageDecoderRegistered(object protocol, object messageType)
{
var messageKey = EtpExtensions.CreateMessageKey(Convert.ToInt32(protocol), Convert.ToInt32(messageType));
return(MessageDecoders.ContainsKey(messageKey));
}
/// <summary>
/// Registers a handler for the specific protocol message.
/// </summary>
/// <typeparam name="T">The message type.</typeparam>
/// <param name="protocol">The message protocol.</param>
/// <param name="messageType">The type of the message.</param>
/// <param name="messageHandler">The protocol message handler.</param>
/// <remarks>If more than one handler is registered for the same protocol message, the last registered handler will be used.</remarks>
public void RegisterMessageHandler <T>(object protocol, object messageType, Action <IMessageHeader, T> messageHandler) where T : ISpecificRecord
{
var messageKey = EtpExtensions.CreateMessageKey(Convert.ToInt32(protocol), Convert.ToInt32(messageType));
MessageHandlers[messageKey] = (h, b) => messageHandler(h, (T)b);
}