private async Task <RepositoryDescription> GetRepositoryDescription(ServiceInvocationContext context)
{
// We use ConfigureAwait(false) to prevent .NET from trying to synchronize back to our current Sync Context (UI Thread/HttpContext/etc)
// when continuing from await. We don't care about Sync Context, so this saves the perf hit of syncing back. Our caller will still
// sync back to their current Sync Context when they await us, so this doesn't affect them.
using (context.Trace.EnterExit())
{
try
{
// Invoke the request
var url = new Uri("/", UriKind.Relative);
var response = await context.GetAsync(url, context.CancellationToken)
.ConfigureAwait(continueOnCapturedContext: false);
context.CancellationToken.ThrowIfCancellationRequested();
response.EnsureSuccessStatusCode();
// Parse the response as JSON
var json = JObject.Parse(await response.Content.ReadAsStringAsync()
.ConfigureAwait(continueOnCapturedContext: false));
// Load the json in to a result
return(RepositoryDescription.FromJson(json, context.Trace, context.ResolveUrl(url)));
}
catch (Exception ex)
{
context.Trace.Error(ex);
throw;
}
}
}
private async Task <ServiceClient> CreateClient(string serviceName, ServiceInvocationContext context)
{
using (context.Trace.EnterExit())
{
var service = await GetService(serviceName, context);
return(new ServiceClient(service, this));
}
}
private async Task <ServiceDescription> GetService(string serviceName, ServiceInvocationContext context)
{
using (context.Trace.EnterExit())
{
// TODO: Caching!
var repoDesc = await GetRepositoryDescription(context);
context.CancellationToken.ThrowIfCancellationRequested();
return(repoDesc.Services.FirstOrDefault(svc => String.Equals(svc.Name, serviceName, StringComparison.OrdinalIgnoreCase)));
}
}
private async Task<RepositoryDescription> GetRepositoryDescription(ServiceInvocationContext context)
{
// We use ConfigureAwait(false) to prevent .NET from trying to synchronize back to our current Sync Context (UI Thread/HttpContext/etc)
// when continuing from await. We don't care about Sync Context, so this saves the perf hit of syncing back. Our caller will still
// sync back to their current Sync Context when they await us, so this doesn't affect them.
using (context.Trace.EnterExit())
{
try
{
// Invoke the request
var url = new Uri("/", UriKind.Relative);
var response = await context.GetAsync(url, context.CancellationToken)
.ConfigureAwait(continueOnCapturedContext: false);
context.CancellationToken.ThrowIfCancellationRequested();
response.EnsureSuccessStatusCode();
// Parse the response as JSON
var json = JObject.Parse(await response.Content.ReadAsStringAsync()
.ConfigureAwait(continueOnCapturedContext: false));
// Load the json in to a result
return RepositoryDescription.FromJson(json, context.Trace, context.ResolveUrl(url));
}
catch (Exception ex)
{
context.Trace.Error(ex);
throw;
}
}
}
private async Task<ServiceClient> CreateClient(string serviceName, ServiceInvocationContext context)
{
using (context.Trace.EnterExit())
{
var service = await GetService(serviceName, context);
return new ServiceClient(service, this);
}
}
private async Task<ServiceDescription> GetService(string serviceName, ServiceInvocationContext context)
{
using (context.Trace.EnterExit())
{
// TODO: Caching!
var repoDesc = await GetRepositoryDescription(context);
context.CancellationToken.ThrowIfCancellationRequested();
return repoDesc.Services.FirstOrDefault(svc => String.Equals(svc.Name, serviceName, StringComparison.OrdinalIgnoreCase));
}
}
