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// Licensed to the Apache Software Foundation(ASF) under one
// or more contributor license agreements.See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.The ASF licenses this file
// to you 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.
using System.Threading;
using System.Threading.Tasks;
using Thrift.Protocols.Entities;
namespace Thrift.Protocols
{
/**
* TMultiplexedProtocol is a protocol-independent concrete decorator that allows a Thrift
* client to communicate with a multiplexing Thrift server, by prepending the service name
* to the function name during function calls.
*
* NOTE: THIS IS NOT TO BE USED BY SERVERS.
* On the server, use TMultiplexedProcessor to handle requests from a multiplexing client.
*
* This example uses a single socket transport to invoke two services:
*
* TSocketClientTransport transport = new TSocketClientTransport("localhost", 9090);
* transport.open();
*
* TBinaryProtocol protocol = new TBinaryProtocol(transport);
*
* TMultiplexedProtocol mp = new TMultiplexedProtocol(protocol, "Calculator");
* Calculator.Client service = new Calculator.Client(mp);
*
* TMultiplexedProtocol mp2 = new TMultiplexedProtocol(protocol, "WeatherReport");
* WeatherReport.Client service2 = new WeatherReport.Client(mp2);
*
* System.out.println(service.add(2,2));
* System.out.println(service2.getTemperature());
*
*/
//TODO: implementation of TProtocol
// ReSharper disable once InconsistentNaming
public class TMultiplexedProtocol : TProtocolDecorator
{
/** Used to delimit the service name from the function name */
public const string Separator = ":";
private readonly string _serviceName;
/**
* Wrap the specified protocol, allowing it to be used to communicate with a
* multiplexing server. The <code>serviceName</code> is required as it is
* prepended to the message header so that the multiplexing server can broker
* the function call to the proper service.
*
* Args:
* protocol Your communication protocol of choice, e.g. TBinaryProtocol
* serviceName The service name of the service communicating via this protocol.
*/
public TMultiplexedProtocol(TProtocol protocol, string serviceName)
: base(protocol)
{
_serviceName = serviceName;
}
public override async Task WriteMessageBeginAsync(TMessage message, CancellationToken cancellationToken)
{
switch (message.Type)
{
case TMessageType.Call:
case TMessageType.Oneway:
await base.WriteMessageBeginAsync(new TMessage($"{_serviceName}{Separator}{message.Name}", message.Type, message.SeqID), cancellationToken);
break;
default:
await base.WriteMessageBeginAsync(message, cancellationToken);
break;
}
}
}
}
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