/// <summary>
/// Invoke an action in the context of a service feature.
/// </summary>
/// <remarks>
/// Assumes that there exists a current <see cref="DreamContext"/> that belongs to a request to another feature of this service.
/// </remarks>
/// <param name="verb">Http verb.</param>
/// <param name="path">Feature path.</param>
/// <param name="handler">Action to perform in this context.</param>
/// <returns>Exception thrown by handler or null.</returns>
public Exception InvokeInServiceContext(string verb, string path, Action handler)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
if (string.IsNullOrEmpty(verb))
{
throw new ArgumentNullException("verb");
}
if (path == null)
{
throw new ArgumentNullException("path");
}
// create new new environment for execution
XUri uri = Self.AtPath(path);
DreamContext current = DreamContext.Current;
Exception e = TaskEnv.ExecuteNew(delegate {
DreamFeatureStage[] stages = new DreamFeatureStage[] {
new DreamFeatureStage("InServiceInvokeHandler", InServiceInvokeHandler, DreamAccess.Private)
};
// BUGBUGBUG (steveb): when invoking a remote function this way, we're are not running the proloques and epilogues, which leads to errors;
// also dream-access attributes are being ignored (i.e. 'public' vs. 'private')
DreamMessage message = DreamUtil.AppendHeadersToInternallyForwardedMessage(current.Request, DreamMessage.Ok());
var context = current.CreateContext(verb, uri, new DreamFeature(this, Self, 0, stages, verb, path), message);
context.AttachToCurrentTaskEnv();
// pass along host and public-uri information
handler();
}, TimerFactory);
return(e);
}
//--- Constructors ---
internal DreamFeatureChain(DreamFeatureStage stage, bool mainStage, DreamContext context, Result <DreamMessage> response, string previousName)
{
if (context.IsTaskEnvDisposed)
{
throw new InvalidOperationException("cannot go to next feature state with disposed context");
}
this.MainStage = mainStage;
_stage = stage;
_context = context;
_response = response;
_previousName = previousName ?? "N/A";
}
//--- Constructors ---
/// <summary>
/// Create a new feature instance.
/// </summary>
/// <param name="service">Owning Service.</param>
/// <param name="serviceUri">Service Uri.</param>
/// <param name="mainStageIndex">Main stage index.</param>
/// <param name="stages">Feature stages.</param>
/// <param name="verb">Request verb.</param>
/// <param name="signature">Feature signature.</param>
/// <param name="featureParamAttributes">Feature parameter attributes</param>
public DreamFeature(IDreamService service, XUri serviceUri, int mainStageIndex, DreamFeatureStage[] stages, string verb, string signature, IEnumerable<DreamFeatureParamAttribute> featureParamAttributes)
{
this.Service = service;
this.ServiceUri = serviceUri;
this.Stages = stages;
this.MainStageIndex = mainStageIndex;
this.Verb = verb;
this.ExceptionTranslators = service.ExceptionTranslators;
this.FeatureParamAttributes = featureParamAttributes;
ParseFeatureSignature(serviceUri, signature, out this.PathSegments, out _paramNames, out this.OptionalSegments);
}
//--- Constructors ---
internal DreamFeatureChain(DreamFeatureStage stage, bool mainStage, DreamContext context, Result<DreamMessage> response, string previousName)
{
if(context.IsTaskEnvDisposed) {
throw new InvalidOperationException("cannot go to next feature state with disposed context");
}
this.MainStage = mainStage;
_stage = stage;
_context = context;
_response = response;
_previousName = previousName ?? "N/A";
}
/// <summary>
/// Invoke an action in the context of a service feature.
/// </summary>
/// <remarks>
/// Assumes that there exists a current <see cref="DreamContext"/> that belongs to a request to another feature of this service.
/// </remarks>
/// <param name="verb">Http verb.</param>
/// <param name="path">Feature path.</param>
/// <param name="handler">Action to perform in this context.</param>
/// <returns>Exception thrown by handler or null.</returns>
public Exception InvokeInServiceContext(string verb, string path, Action handler)
{
if(handler == null) {
throw new ArgumentNullException("handler");
}
if(string.IsNullOrEmpty(verb)) {
throw new ArgumentNullException("verb");
}
if(path == null) {
throw new ArgumentNullException("path");
}
// create new new environment for execution
XUri uri = Self.AtPath(path);
DreamContext current = DreamContext.Current;
Exception e = TaskEnv.ExecuteNew(delegate {
DreamFeatureStage[] stages = new DreamFeatureStage[] {
new DreamFeatureStage("InServiceInvokeHandler", InServiceInvokeHandler, DreamAccess.Private)
};
// BUGBUGBUG (steveb): when invoking a remote function this way, we're are not running the proloques and epilogues, which leads to errors;
// also dream-access attributes are being ignored (i.e. 'public' vs. 'private')
DreamMessage message = DreamUtil.AppendHeadersToInternallyForwardedMessage(current.Request, DreamMessage.Ok());
var context = current.CreateContext(verb, uri, new DreamFeature(this, Self, 0, stages, verb, path), message);
context.AttachToCurrentTaskEnv();
// pass along host and public-uri information
handler();
}, TimerFactory);
return e;
}
