我的情况:
问题:
我试图将我的状态服务和无状态WebAPI之间的通信从RPC更改为HTTP通信,因为我想避免使用接口在服务之间进行通信。这甚至可以通过HTTP通信吗?如果是这样,我的无状态WebAPI如何在不使用接口的情况下调用有状态应用程序中的特定方法?
更新
感谢alltej,我开始阅读有关HttpCommunicationListeners的更多信息。本教程(https://docs.microsoft.com/nl-nl/azure/service-fabric/service-fabric-concepts-partitioning)很好地解释了Http Communication。
在下面的代码片段中:" CreateServiceReplicaListeners()"调用CreateInternalListener()然后调用" ProcessInternalRequest()"然后最终调用" AddUserAsync()"。
protected override IEnumerable<ServiceReplicaListener> CreateServiceReplicaListeners()
{
return new[] { new ServiceReplicaListener(context => this.CreateInternalListener(context))};
}
private ICommunicationListener CreateInternalListener(ServiceContext context)
{
EndpointResourceDescription internalEndpoint = context.CodePackageActivationContext.GetEndpoint("ProcessingServiceEndpoint");
string uriPrefix = String.Format(
"{0}://+:{1}/{2}/{3}-{4}/",
internalEndpoint.Protocol,
internalEndpoint.Port,
context.PartitionId,
context.ReplicaOrInstanceId,
Guid.NewGuid());
string nodeIP = FabricRuntime.GetNodeContext().IPAddressOrFQDN;
string uriPublished = uriPrefix.Replace("+", nodeIP);
return new HttpCommunicationListener(uriPrefix, uriPublished, this.ProcessInternalRequest);
}
private async Task ProcessInternalRequest(HttpListenerContext context, CancellationToken cancelRequest)
{
string output = null;
string user = context.Request.QueryString["lastname"].ToString();
try
{
output = await this.AddUserAsync(user);
}
catch (Exception ex)
{
output = ex.Message;
}
using (HttpListenerResponse response = context.Response)
{
if (output != null)
{
byte[] outBytes = Encoding.UTF8.GetBytes(output);
response.OutputStream.Write(outBytes, 0, outBytes.Length);
}
}
}
private async Task<string> AddUserAsync(string user)
{
IReliableDictionary<String, String> dictionary = await this.StateManager.GetOrAddAsync<IReliableDictionary<String, String>>("dictionary");
using (ITransaction tx = this.StateManager.CreateTransaction())
{
bool addResult = await dictionary.TryAddAsync(tx, user.ToUpperInvariant(), user);
await tx.CommitAsync();
return String.Format(
"User {0} {1}",
user,
addResult ? "sucessfully added" : "already exists");
}
}
}
答案 0 :(得分:3)
MyCustomHttpListener是一个必须创建的类,它是您自己的实现ICommunicationListener的自定义侦听器。它包含您需要覆盖的三种方法。有关OwinCommunicationListener,请参阅此处的示例:https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-reliable-services-communication-webapi