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1 | // Licensed to the Apache Software Foundation(ASF) under one |
2 | // or more contributor license agreements.See the NOTICE file | |
3 | // distributed with this work for additional information | |
4 | // regarding copyright ownership.The ASF licenses this file | |
5 | // to you under the Apache License, Version 2.0 (the | |
6 | // "License"); you may not use this file except in compliance | |
7 | // with the License. You may obtain a copy of the License at | |
8 | // | |
9 | // http://www.apache.org/licenses/LICENSE-2.0 | |
10 | // | |
11 | // Unless required by applicable law or agreed to in writing, | |
12 | // software distributed under the License is distributed on an | |
13 | // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
14 | // KIND, either express or implied. See the License for the | |
15 | // specific language governing permissions and limitations | |
16 | // under the License. | |
17 | ||
18 | using System.Threading; | |
19 | using System.Threading.Tasks; | |
20 | using Thrift.Protocol.Entities; | |
21 | ||
22 | namespace Thrift.Protocol | |
23 | { | |
24 | /** | |
25 | * TMultiplexedProtocol is a protocol-independent concrete decorator that allows a Thrift | |
26 | * client to communicate with a multiplexing Thrift server, by prepending the service name | |
27 | * to the function name during function calls. | |
28 | * | |
29 | * NOTE: THIS IS NOT TO BE USED BY SERVERS. | |
30 | * On the server, use TMultiplexedProcessor to handle requests from a multiplexing client. | |
31 | * | |
32 | * This example uses a single socket transport to invoke two services: | |
33 | * | |
34 | * TSocketTransport transport = new TSocketTransport("localhost", 9090); | |
35 | * transport.open(); | |
36 | * | |
37 | * TBinaryProtocol protocol = new TBinaryProtocol(transport); | |
38 | * | |
39 | * TMultiplexedProtocol mp = new TMultiplexedProtocol(protocol, "Calculator"); | |
40 | * Calculator.Client service = new Calculator.Client(mp); | |
41 | * | |
42 | * TMultiplexedProtocol mp2 = new TMultiplexedProtocol(protocol, "WeatherReport"); | |
43 | * WeatherReport.Client service2 = new WeatherReport.Client(mp2); | |
44 | * | |
45 | * System.out.println(service.add(2,2)); | |
46 | * System.out.println(service2.getTemperature()); | |
47 | * | |
48 | */ | |
49 | ||
50 | //TODO: implementation of TProtocol | |
51 | ||
52 | // ReSharper disable once InconsistentNaming | |
53 | public class TMultiplexedProtocol : TProtocolDecorator | |
54 | { | |
55 | /** Used to delimit the service name from the function name */ | |
56 | public const string Separator = ":"; | |
57 | ||
58 | private readonly string _serviceName; | |
59 | ||
60 | /** | |
61 | * Wrap the specified protocol, allowing it to be used to communicate with a | |
62 | * multiplexing server. The <code>serviceName</code> is required as it is | |
63 | * prepended to the message header so that the multiplexing server can broker | |
64 | * the function call to the proper service. | |
65 | * | |
66 | * Args: | |
67 | * protocol Your communication protocol of choice, e.g. TBinaryProtocol | |
68 | * serviceName The service name of the service communicating via this protocol. | |
69 | */ | |
70 | ||
71 | public TMultiplexedProtocol(TProtocol protocol, string serviceName) | |
72 | : base(protocol) | |
73 | { | |
74 | _serviceName = serviceName; | |
75 | } | |
76 | ||
77 | public override async Task WriteMessageBeginAsync(TMessage message, CancellationToken cancellationToken) | |
78 | { | |
79 | switch (message.Type) | |
80 | { | |
81 | case TMessageType.Call: | |
82 | case TMessageType.Oneway: | |
83 | await base.WriteMessageBeginAsync(new TMessage($"{_serviceName}{Separator}{message.Name}", message.Type, message.SeqID), cancellationToken); | |
84 | break; | |
85 | default: | |
86 | await base.WriteMessageBeginAsync(message, cancellationToken); | |
87 | break; | |
88 | } | |
89 | } | |
90 | } | |
91 | } |