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Add support for different strategies when generating RPC topics.

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This commit is contained in:
Christian Kratky
2019-08-13 19:53:55 +02:00
parent 0cfb8b4020
commit 2e3cf54f11
9 changed files with 156 additions and 5 deletions
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Source/MQTTnet.Extensions.Rpc/MqttRpcClient.cs
+30 -3
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@@ -5,6 +5,8 @@ using System.Threading;
using System.Threading.Tasks;
using MQTTnet.Client;
using MQTTnet.Exceptions;
using MQTTnet.Extensions.Rpc.Options;
using MQTTnet.Extensions.Rpc.Options.TopicGeneration;
using MQTTnet.Protocol;
namespace MQTTnet.Extensions.Rpc
@@ -13,11 +15,18 @@ namespace MQTTnet.Extensions.Rpc
{
private readonly ConcurrentDictionary<string, TaskCompletionSource<byte[]>> _waitingCalls = new ConcurrentDictionary<string, TaskCompletionSource<byte[]>>();
private readonly IMqttClient _mqttClient;
private readonly IMqttRpcClientOptions _options;
private readonly RpcAwareApplicationMessageReceivedHandler _applicationMessageReceivedHandler;
public MqttRpcClient(IMqttClient mqttClient)
[Obsolete("Use MqttRpcClient(IMqttClient mqttClient, IMqttRpcClientOptions options).")]
public MqttRpcClient(IMqttClient mqttClient) : this(mqttClient, new MqttRpcClientOptions())
{
}
public MqttRpcClient(IMqttClient mqttClient, IMqttRpcClientOptions options)
{
_mqttClient = mqttClient ?? throw new ArgumentNullException(nameof(mqttClient));
_options = options ?? throw new ArgumentNullException(nameof(options));
_applicationMessageReceivedHandler = new RpcAwareApplicationMessageReceivedHandler(
mqttClient.ApplicationMessageReceivedHandler,
@@ -55,8 +64,26 @@ namespace MQTTnet.Extensions.Rpc
throw new InvalidOperationException("The application message received handler was modified.");
}
var requestTopic = $"MQTTnet.RPC/{Guid.NewGuid():N}/{methodName}";
var responseTopic = requestTopic + "/response";
var topicNames = _options.TopicGenerationStrategy.CreateRpcTopics(new TopicGenerationContext
{
MethodName = methodName,
QualityOfServiceLevel = qualityOfServiceLevel,
MqttClient = _mqttClient,
Options = _options
});
var requestTopic = topicNames.RequestTopic;
var responseTopic = topicNames.ResponseTopic;
if (string.IsNullOrWhiteSpace(requestTopic))
{
throw new MqttProtocolViolationException("RPC request topic is empty.");
}
if (string.IsNullOrWhiteSpace(responseTopic))
{
throw new MqttProtocolViolationException("RPC response topic is empty.");
}
var requestMessage = new MqttApplicationMessageBuilder()
.WithTopic(requestTopic)