public EndpointMiddleware(RequestDelegate next, CompositionHost host, ILoggerFactory loggerFactory)
{
_next = next;
_host = host;
_projectSystems = host.GetExports <IProjectSystem>();
_logger = loggerFactory.CreateLogger <EndpointMiddleware>();
var endpoints = _host.GetExports <Lazy <IRequest, EndpointDescriptor> >()
.Select(x => x.Metadata);
var handlers = _host.GetExports <Lazy <IRequestHandler, OmniSharpLanguage> >();
_endpoints = new HashSet <string>(
endpoints
.Select(x => x.EndpointName)
.Distinct(),
StringComparer.OrdinalIgnoreCase
);
var updateBufferEndpointHandler = new Lazy <EndpointHandler <UpdateBufferRequest, object> >(() => (EndpointHandler <UpdateBufferRequest, object>)_endpointHandlers[OmnisharpEndpoints.UpdateBuffer].Value);
var languagePredicateHandler = new LanguagePredicateHandler(_projectSystems);
var projectSystemPredicateHandler = new StaticLanguagePredicateHandler("Projects");
var nugetPredicateHandler = new StaticLanguagePredicateHandler("NuGet");
var endpointHandlers = endpoints.ToDictionary(
x => x.EndpointName,
endpoint => new Lazy <EndpointHandler>(() =>
{
IPredicateHandler handler;
// Projects are a special case, this allows us to select the correct "Projects" language for them
if (endpoint.EndpointName == OmnisharpEndpoints.ProjectInformation || endpoint.EndpointName == OmnisharpEndpoints.WorkspaceInformation)
{
handler = projectSystemPredicateHandler;
}
else if (endpoint.EndpointName == OmnisharpEndpoints.PackageSearch || endpoint.EndpointName == OmnisharpEndpoints.PackageSource || endpoint.EndpointName == OmnisharpEndpoints.PackageVersion)
{
handler = nugetPredicateHandler;
}
else
{
handler = languagePredicateHandler;
}
// This lets any endpoint, that contains a Request object, invoke update buffer.
// The language will be same language as the caller, this means any language service
// must implement update buffer.
var updateEndpointHandler = updateBufferEndpointHandler;
if (endpoint.EndpointName == OmnisharpEndpoints.UpdateBuffer)
{
// We don't want to call update buffer on update buffer.
updateEndpointHandler = new Lazy <EndpointHandler <UpdateBufferRequest, object> >(() => null);
}
return(EndpointHandler.Factory(handler, _host, _logger, endpoint, handlers, updateEndpointHandler, Enumerable.Empty <Plugin>()));
}),
StringComparer.OrdinalIgnoreCase
);
_endpointHandlers = new ReadOnlyDictionary <string, Lazy <EndpointHandler> >(endpointHandlers);
}
private IDictionary <string, Lazy <EndpointHandler> > Initialize()
{
var workspace = _compositionHost.GetExport <OmniSharpWorkspace>();
var projectSystems = _compositionHost.GetExports <IProjectSystem>();
var endpointMetadatas = _compositionHost.GetExports <Lazy <IRequest, OmniSharpEndpointMetadata> >()
.Select(x => x.Metadata)
.ToArray();
var handlers = _compositionHost.GetExports <Lazy <IRequestHandler, OmniSharpRequestHandlerMetadata> >();
var updateBufferEndpointHandler = new Lazy <EndpointHandler <UpdateBufferRequest, object> >(
() => (EndpointHandler <UpdateBufferRequest, object>)_endpointHandlers[OmniSharpEndpoints.UpdateBuffer].Value);
var languagePredicateHandler = new LanguagePredicateHandler(projectSystems);
var projectSystemPredicateHandler = new StaticLanguagePredicateHandler("Projects");
var nugetPredicateHandler = new StaticLanguagePredicateHandler("NuGet");
var endpointHandlers = endpointMetadatas.ToDictionary(
x => x.EndpointName,
endpoint => new Lazy <EndpointHandler>(() =>
{
IPredicateHandler handler;
// Projects are a special case, this allows us to select the correct "Projects" language for them
if (endpoint.EndpointName == OmniSharpEndpoints.ProjectInformation || endpoint.EndpointName == OmniSharpEndpoints.WorkspaceInformation)
{
handler = projectSystemPredicateHandler;
}
else if (endpoint.EndpointName == OmniSharpEndpoints.PackageSearch || endpoint.EndpointName == OmniSharpEndpoints.PackageSource || endpoint.EndpointName == OmniSharpEndpoints.PackageVersion)
{
handler = nugetPredicateHandler;
}
else
{
handler = languagePredicateHandler;
}
// This lets any endpoint, that contains a Request object, invoke update buffer.
// The language will be same language as the caller, this means any language service
// must implement update buffer.
var updateEndpointHandler = updateBufferEndpointHandler;
if (endpoint.EndpointName == OmniSharpEndpoints.UpdateBuffer)
{
// We don't want to call update buffer on update buffer.
updateEndpointHandler = new Lazy <EndpointHandler <UpdateBufferRequest, object> >(() => null);
}
return(EndpointHandler.Factory(handler, _compositionHost, _logger, endpoint, handlers, updateEndpointHandler, Enumerable.Empty <Plugin>()));
}),
StringComparer.OrdinalIgnoreCase
);
// Handled as alternative middleware in http
endpointHandlers.Add(
OmniSharpEndpoints.CheckAliveStatus,
new Lazy <EndpointHandler>(
() => new GenericEndpointHandler(x => Task.FromResult <object>(true)))
);
endpointHandlers.Add(
OmniSharpEndpoints.CheckReadyStatus,
new Lazy <EndpointHandler>(
() => new GenericEndpointHandler(x => Task.FromResult <object>(workspace.Initialized)))
);
endpointHandlers.Add(
OmniSharpEndpoints.StopServer,
new Lazy <EndpointHandler>(
() => new GenericEndpointHandler(x =>
{
_cancellationTokenSource.Cancel();
return(Task.FromResult <object>(null));
}))
);
return(endpointHandlers);
}