private async ValueTask ReceiveMessage(Server server, ClientMessageConnection connection, ClientMessage message)
{
HConsole.WriteLine(this, "Respond");
var text = Encoding.UTF8.GetString(message.FirstFrame.Bytes);
#if NETSTANDARD2_1
var responseText = text switch
{
"a" => "alpha",
"b" => "bravo",
_ => "??"
};
#else
var responseText =
text == "a" ? "alpha" :
text == "b" ? "bravo" :
"??";
#endif
// this is very basic stuff and does not respect HZ protocol
// the 64-bytes header is nonsense etc
var response = new ClientMessage()
.Append(new Frame(new byte[64])) // header stuff
.Append(new Frame(Encoding.UTF8.GetBytes(responseText)));
response.CorrelationId = message.CorrelationId;
response.MessageType = 0x1; // 0x00 means exception
// send in one fragment, set flags
response.Flags |= ClientMessageFlags.BeginFragment | ClientMessageFlags.EndFragment;
await connection.SendAsync(response).CfAwait();
HConsole.WriteLine(this, "Responded");
}
private async Task HandleAsync(Server server, ClientMessageConnection connection, ClientMessage requestMessage,
Func <Server, ClientMessageConnection, ClientMessage, ValueTask> handler)
{
var correlationId = requestMessage.CorrelationId;
async Task SendResponseAsync(ClientMessage response)
{
response.CorrelationId = requestMessage.CorrelationId;
response.Flags |= ClientMessageFlags.BeginFragment | ClientMessageFlags.EndFragment;
await connection.SendAsync(response).CfAwait();
}
async Task SendEventAsync(ClientMessage eventMessage, long correlationId)
{
eventMessage.CorrelationId = correlationId;
eventMessage.Flags |= ClientMessageFlags.BeginFragment | ClientMessageFlags.EndFragment;
await connection.SendAsync(eventMessage).CfAwait();
}
switch (requestMessage.MessageType)
{
// handle authentication
case ClientAuthenticationServerCodec.RequestMessageType:
{
var request = ClientAuthenticationServerCodec.DecodeRequest(requestMessage);
var responseMessage = ClientAuthenticationServerCodec.EncodeResponse(
0, server.Address, server.MemberId, SerializationService.SerializerVersion,
"4.0", 1, server.ClusterId, false);
await SendResponseAsync(responseMessage).CfAwait();
break;
}
// handle events
case ClientAddClusterViewListenerServerCodec.RequestMessageType:
{
var request = ClientAddClusterViewListenerServerCodec.DecodeRequest(requestMessage);
var responseMessage = ClientAddClusterViewListenerServerCodec.EncodeResponse();
await SendResponseAsync(responseMessage).CfAwait();
_ = Task.Run(async() =>
{
await Task.Delay(500).CfAwait();
var eventMessage = ClientAddClusterViewListenerServerCodec.EncodeMembersViewEvent(1, new[]
{
new MemberInfo(server.MemberId, server.Address, new MemberVersion(4, 0, 0), false, new Dictionary <string, string>()),
});
await SendEventAsync(eventMessage, correlationId).CfAwait();
});
break;
}
// handle others
default:
await handler(server, connection, requestMessage).CfAwait();
break;
}
}
public void ArgumentExceptions()
{
var endpoint = NetworkAddress.Parse("127.0.0.1:11000").IPEndPoint;
var s = new ClientSocketConnection(1, endpoint, new NetworkingOptions(), new SslOptions(), new NullLoggerFactory());
var c = new ClientMessageConnection(s, new NullLoggerFactory());
Assert.ThrowsAsync <ArgumentNullException>(async() => _ = await c.SendAsync(null));
}
public async Task OnReceiveMessage()
{
var endpoint = NetworkAddress.Parse("127.0.0.1:11000").IPEndPoint;
var s = new ClientSocketConnection(1, endpoint, new NetworkingOptions(), new SslOptions(), new NullLoggerFactory());
var c = new ClientMessageConnection(s, new NullLoggerFactory())
{
OnReceiveMessage = OnReceiveMessageNotImplemented
};
Assert.That(c.OnReceiveMessage, Is.Not.Null);
Assert.Throws <NotImplementedException>(() => c.OnReceiveMessage(default, default));
private void ReceiveMessage(ClientMessageConnection connection, ClientMessage requestMessage)
{
lock (_handlerLock)
{
if (_handlerTask == null)
{
_handlerTask = _handler(this, connection, requestMessage).AsTask();
}
else
{
_handlerTask = _handlerTask.ContinueWith(_ => _handler(this, connection, requestMessage).AsTask()).Unwrap();
}
}
}
private async Task ReceiveMessageAsync(ClientMessageConnection connection, ClientMessage requestMessage)
{
var correlationId = requestMessage.CorrelationId;
switch (requestMessage.MessageType)
{
// handle authentication
case ClientAuthenticationServerCodec.RequestMessageType:
{
var request = ClientAuthenticationServerCodec.DecodeRequest(requestMessage);
var responseMessage = ClientAuthenticationServerCodec.EncodeResponse(
0, _address, _memberId, SerializationService.SerializerVersion,
"4.0", 1, _clusterId, false);
await SendAsync(connection, responseMessage, correlationId).CAF();
break;
}
// handle events
case ClientAddClusterViewListenerServerCodec.RequestMessageType:
{
var request = ClientAddClusterViewListenerServerCodec.DecodeRequest(requestMessage);
var responseMessage = ClientAddClusterViewListenerServerCodec.EncodeResponse();
await SendAsync(connection, responseMessage, correlationId).CAF();
_ = Task.Run(async() =>
{
await Task.Delay(500).CAF();
var eventMessage = ClientAddClusterViewListenerServerCodec.EncodeMembersViewEvent(1, new[]
{
new MemberInfo(_memberId, _address, new MemberVersion(4, 0, 0), false, new Dictionary <string, string>()),
});
await SendAsync(connection, eventMessage, correlationId).CAF();
});
break;
}
// handle others
default:
await _handler(this, connection, requestMessage).CAF();
break;
}
}
/// <summary>
/// Handles new connections.
/// </summary>
/// <param name="serverConnection">The new connection.</param>
private void AcceptConnection(ServerSocketConnection serverConnection)
{
// the connection we receive is not wired yet
// must wire it properly before accepting
lock (_openLock)
{
if (!_open)
{
throw new InvalidOperationException("Cannot accept connections (closed).");
}
var messageConnection = new ClientMessageConnection(serverConnection, _loggerFactory)
{
OnReceiveMessage = ReceiveMessage
};
HConsole.Configure(x => x.Configure(messageConnection).SetIndent(28).SetPrefix("SVR.MSG".Dot(_hcname)));
serverConnection.OnShutdown = SocketShutdown;
serverConnection.ExpectPrefixBytes(3, ReceivePrefixBytes);
serverConnection.Accept();
_connections[serverConnection.Id] = serverConnection;
}
}
private async ValueTask ServerHandler(Server s, ClientMessageConnection conn, ClientMessage msg)
{
async Task SendResponseAsync(ClientMessage response)
{
response.CorrelationId = msg.CorrelationId;
response.Flags |= ClientMessageFlags.BeginFragment | ClientMessageFlags.EndFragment;
await conn.SendAsync(response).CfAwait();
}
async Task SendEventAsync(ClientMessage eventMessage, long correlationId)
{
eventMessage.CorrelationId = correlationId;
eventMessage.Flags |= ClientMessageFlags.BeginFragment | ClientMessageFlags.EndFragment;
await conn.SendAsync(eventMessage).CfAwait();
}
async Task SendErrorAsync(RemoteError error, string message)
{
var errorHolders = new List <ErrorHolder>
{
new ErrorHolder(error, "?", message, Enumerable.Empty <StackTraceElement>())
};
var response = ErrorsServerCodec.EncodeResponse(errorHolders);
await SendResponseAsync(response).CfAwait();
}
var state = (ServerState)s.State;
var address = s.Address;
const int partitionsCount = 2;
switch (msg.MessageType)
{
// must handle auth
case ClientAuthenticationServerCodec.RequestMessageType:
{
HConsole.WriteLine(this, $"(server{state.Id}) Authentication");
var authRequest = ClientAuthenticationServerCodec.DecodeRequest(msg);
var authResponse = ClientAuthenticationServerCodec.EncodeResponse(
0, address, s.MemberId, SerializationService.SerializerVersion,
"4.0", partitionsCount, s.ClusterId, false);
await SendResponseAsync(authResponse).CfAwait();
break;
}
// must handle events
case ClientAddClusterViewListenerServerCodec.RequestMessageType:
{
HConsole.WriteLine(this, $"(server{state.Id}) AddClusterViewListener");
var addRequest = ClientAddClusterViewListenerServerCodec.DecodeRequest(msg);
var addResponse = ClientAddClusterViewListenerServerCodec.EncodeResponse();
await SendResponseAsync(addResponse).CfAwait();
_ = Task.Run(async() =>
{
await Task.Delay(500).CfAwait();
const int membersVersion = 1;
var memberVersion = new MemberVersion(4, 0, 0);
var memberAttributes = new Dictionary <string, string>();
var membersEventMessage = ClientAddClusterViewListenerServerCodec.EncodeMembersViewEvent(membersVersion, new[]
{
new MemberInfo(state.MemberIds[0], state.Addresses[0], memberVersion, false, memberAttributes),
new MemberInfo(state.MemberIds[1], state.Addresses[1], memberVersion, false, memberAttributes),
});
await SendEventAsync(membersEventMessage, msg.CorrelationId).CfAwait();
await Task.Delay(500).CfAwait();
const int partitionsVersion = 1;
var partitionsEventMessage = ClientAddClusterViewListenerServerCodec.EncodePartitionsViewEvent(partitionsVersion, new[]
{
new KeyValuePair <Guid, IList <int> >(state.MemberIds[0], new List <int> {
0
}),
new KeyValuePair <Guid, IList <int> >(state.MemberIds[1], new List <int> {
1
}),
});
await SendEventAsync(partitionsEventMessage, msg.CorrelationId).CfAwait();
});
break;
}
// create object
case ClientCreateProxyServerCodec.RequestMessageType:
{
HConsole.WriteLine(this, $"(server{state.Id}) CreateProxy");
var createRequest = ClientCreateProxyServerCodec.DecodeRequest(msg);
var createResponse = ClientCreateProxiesServerCodec.EncodeResponse();
await SendResponseAsync(createResponse).CfAwait();
break;
}
// subscribe
case MapAddEntryListenerServerCodec.RequestMessageType:
{
HConsole.WriteLine(this, $"(server{state.Id}) AddEntryListener");
var addRequest = MapAddEntryListenerServerCodec.DecodeRequest(msg);
state.Subscribed = true;
state.SubscriptionCorrelationId = msg.CorrelationId;
var addResponse = MapAddEntryListenerServerCodec.EncodeResponse(state.SubscriptionId);
await SendResponseAsync(addResponse).CfAwait();
break;
}
// unsubscribe
// server 1 removes on first try, server 2 removes on later tries
case MapRemoveEntryListenerServerCodec.RequestMessageType:
{
HConsole.WriteLine(this, $"(server{state.Id}) RemoveEntryListener");
var removeRequest = MapRemoveEntryListenerServerCodec.DecodeRequest(msg);
var removed = state.Subscribed && removeRequest.RegistrationId == state.SubscriptionId;
removed &= state.Id == 0 || state.UnsubscribeCount++ > 0;
if (removed)
{
state.Subscribed = false;
}
HConsole.WriteLine(this, $"(server{state.Id}) Subscribed={state.Subscribed}");
var removeResponse = MapRemoveEntryListenerServerCodec.EncodeResponse(removed);
await SendResponseAsync(removeResponse).CfAwait();
break;
}
// add to map & trigger event
case MapSetServerCodec.RequestMessageType:
{
HConsole.WriteLine(this, $"(server{state.Id}) Set");
var setRequest = MapSetServerCodec.DecodeRequest(msg);
var setResponse = MapSetServerCodec.EncodeResponse();
await SendResponseAsync(setResponse).CfAwait();
HConsole.WriteLine(this, $"(server{state.Id}) Subscribed={state.Subscribed}");
if (state.Subscribed)
{
HConsole.WriteLine(this, $"(server{state.Id}) Trigger event");
var key = setRequest.Key;
var value = setRequest.Value;
var addedEvent = MapAddEntryListenerServerCodec.EncodeEntryEvent(key, value, value, value, (int)MapEventTypes.Added, state.SubscriptionId, 1);
await SendEventAsync(addedEvent, state.SubscriptionCorrelationId).CfAwait();
}
break;
}
// unexpected message = error
default:
{
// RemoteError.Hazelcast or RemoteError.RetryableHazelcast
var messageName = MessageTypeConstants.GetMessageTypeName(msg.MessageType);
await SendErrorAsync(RemoteError.Hazelcast, $"MessageType {messageName} (0x{msg.MessageType:X}) not implemented.").CfAwait();
break;
}
}
}
protected async Task SendAsync(ClientMessageConnection connection, ClientMessage eventMessage, long correlationId)
{
eventMessage.CorrelationId = correlationId;
eventMessage.Flags |= ClientMessageFlags.BeginFragment | ClientMessageFlags.EndFragment;
await connection.SendAsync(eventMessage).CfAwait();
}
