I have a problem with the dnn module communication. I have a module that implements the module communication interface both listener and sender. in this module, I have a placeholder where I load a new ascx control. the problem is when I want to Communicate from this new dynamically loaded control. In this control i also implemented module communication interfaces( listener and sender). but when I call sender method, in this dynamic loaded control to update an other module (on same page)nothing happens. But then i call a " sender " from the dynamic loaded controls container control( the control where i have the placeholder) it works updating the other module on the same page. It seams that module comunications do not work in dynamic loaded ascx controls at all.
Is there anyone who have any idea , to solve this
/theonealf
I would guess that it's a timing issue. Try loading your dynamic control in the Init event, and see if it will catch the communication being sent.
Agree with #bdukes, Also there are additional things that I would recommend to check:
Check if there is any exception while nothing happens
Does your control inherits from PortalModuleBase? This will be required if you want to use moduleId, UserInfo, PortalId or any other dnn specific objects.
There can be other checks but it depends on your answer by trying above and #bdukes suggestion.
Honestly, I have had limited success with the communications interface. If you can get to work for your needs, then excellent. In case you find you need another solution, here's what I've done:
If I understand the question correctly, you're concerned with the specific use-case where one module needs to communicate with another module during the loading of a page. If that is so, you most likely have one module which is the one that needs to communicate, and one or more modules which need to pick up that communication.
I've used Context.Items in combination with the ASP.NET life cycle to solve this problem. The Items collection is just a bag that anything can be stuffed into or pulled out of. The module that needs to communicate can put things into that item bag during Page_Load:
var item = "My Thing";
Context.Items.Add("MyThingKey", item);
The modules which need to consume that thing can pull things out of that bag during PreRender.
var item = Context.Items["MyThingKey"].ToString();
The key is doing this during PreRender. This way, you are assured that the consuming of the communication happens after the production of the communication.
Good luck!
Related
I have a requirement in hand where I need to change the Mule Flow Threading Behavior at runtime without the need of bouncing the whole Mule Container. I figured out few different ways to achieve this, but none of them are working.
I tried accessing the Mule Context Registry and from there I was trying to do a lookup of "FlowConstructLifecycleManager" Object so that I can tap in there and access the threading profile of the object and reset those values, then stop and start the flow programmatically in order to get the change applied in the flow. I am stuck in this approach as I was unable to get hold of the FlowConstructLifecycleManager Object neither from the Mule Spring Registry nor from the Transient Registry. I was able to get hold of the Flow object though which has a direct reference to that FlowConstructLifecycleManager Object. But, unfortunately, they made this object as protected and didn't expose any method for us to access this object.
Since I was unable to access this FlowConstructLifecycleManager directly from Mule implemented Flow class, I decided to extend this Flow class and just add another public method to it so that I can access FlowConstructLifecycleManager object from Flow object programmatically. But, I am stuck in this approach as well as even if I am putting my version of the same Flow class packaged and dropped in lib/user folder of the container, it is still not picking up my version of the class, and loading the original version instead.
It would be of great help if I can get any pointer on the approach of solving either my first or second problem.
Thanks in advance,
Ananya
In our company, we are building a dashboard from where we should be able to start/stop any flow or change the processing power of any flow by increasing/ decreasing the active threads for a flow or changing the pollen polling frequency. All of these should be done at runtime without any server downtime.
Anyway, I made it working finally. I had to patch up the mule-core jar and expose few objects so that I can get to the thread profile object and tweak the values at runtime and stop/ start the flow to reflect the changes to take effect. I know this is little bit messy and but it works.
Thanks,
Ananya
I'm trying to create a custom build of noflo-ui that is effectively only a graph editor. Don't need it to connect to any runtimes.
I'm struggling to find where I can inject this code as it appears part of noflo-ui is written in noflo itself and I cannot find the scripts for those pieces.
For example, in graphs/main.fbp, there is this line:
'user,main,project,github,runtime,context' -> ROUTES Dispatch
Three questions on this:
Where is the source behind the Dispatch component?
If I add my own interface elements to Load data from an external api, where would be the best place to inject that data?
I see a lot of event driven code, so I'm guessing I would add a new polymer element, do my ajax call, the emit or fire something. I believe this is what happens when connecting to a noflo-nodejs runtime; I've traced the connection to line 51312 in a built noflo-ui.js
return port.send({
componentDefinition: definition
});
... but I can't figure out where it goes past here. A port on the main.fbp graph? As per my 1st question, I cannot find the source behind these core graphs.
And this leads to my last question
The code I pasted above from noflo-ui, I cannot find this code anywhere pre-build. I even searched the entire project tree for "componentDefinition: definition". Where is this coming from?
Any pointers on this would be greatly appreciated! Thanks
The FBP runtime protocol is the primary extension point of noflo-ui. You can implement a "runtime" which just provides components and graphs (for instance from a database), without a way to run these.
A network:persist message to let the UI indicate that "this is a good point to save the graphs" has been specced but is currently not implemented. For now you can just autosave latest state.
We have a Seaside Application in place that creates a session and handles user login etc. So we're happy with that.
But we'd like to have the ability to serve a few pages using a fixed url. This is not a problem using #initialRequest: and delegating to a certain component depending on the url. What I'd like to avoid, however, is that some of these pages create a new session and start up all the machinery that's coming with it.
Any ideas?
Seaside 2
You could create a WASession (or WAMain) subclass which will be used if the request was static. Then in that session (or main) you could override those methods that do too much for your liking.
Seaside 3
You could use the new filter mechanism. If I recall correctly you can take control of the request pretty much at any time. That should give you enough leverage to do what you want.
Or if you don't need session state, just subclass WARequestHandler and register an instance somewhere in your handler tree (presumably in a WADispatcher).
There's some messiness currently if you want to use a Canvas for rendering but there should be some examples in the image.
I've spend days trying to find a solution the problem i'm going to try to describe, i've googled alot and even looked at the .NET 4 reference source for SendReply and InternalSendReply activity. But until now i'm stuck.
To make the life of our end customers simpler i want to replace the Receive and SendReply activities with custom activites and use bookmarks instead.
I'm implementing a central webservice which can route to a correct workflow instance, that workflow modifies the bookmark value and finaly it creates a new bookmark while returning the modified bookmark value. It's rather complex already with a WorkflowServiceHostFactory which adds Behaviours and Attach a DataContractResolver to the endpoint.
The endpoint is derived from WorkflowHostingEndpoint which resolves a bookmark created in a custom activity (instead of a receive). And i want another activity instead of a sendreply. Those 2 should correlate and the custom sendreply does send a response on the open channel through the endpoint while creating a new bookmark.
The problem is that i didn't find a way yet to access the endpoint responseContext from within my custom send activity. On the other side, at the workflowcreating endpoint side, it seems that i'm not able to be notified whenever the workflow becomes Idle and as well i don't seem to be able to access the WorkflowExtensions from the host. i'm missing something?
A possible solution i've in mind might be not using a WorkflowServiceHost, but then i loose alot of AppFabric functionaly.
The workflowapplication in platform update 1 has some extension methods called RunEpisode with an overload Func called idleEventCallback. There it's possible to hook into the OnIdle and get a workflowextension to get the object to send back as response.
To answer my own question, i ended up in a workaround using the servicebroker functionality of sql server. The SqlDependency class where the workflow listens for the event to be fired whenever the workflow reach the activity that creates a new bookmark in another state.
I'm working on a small application using C++/wxWidgets, where several parts of the GUI need to be updated based on e.g. received UDP datagrams. More specifically, a secondary thread tries to keep a list of available "clients" in the network (which may come and go away) and e.g. corresponding comboboxes in the UI need to be updated to reflect the changes.
The documentation mentions that for this kind of thing EVT_UPDATE_UI would be a good choice. As far as I can understand from the sparse documentation, this event is sent automatically by the system and provides some support for assisted UI change.
However, I'd feel more comfortable using a more direct approach, i.e. where e.g. a window object could register/subscribe to receive notifications (either events or callbacks) upon particular events and another part of the code is sending out these notifications when required. I could do this in C++ using my own code, however I guess if wxWidgets already supports something like that, I should make use of it. However I haven't found anything in that regards.
So, the question is: does wxWidgets support this kind of notification system (or similar alternatives) or would I be best served coding my own?
AFAIK there is nothing directly usable in wxWidgets, but doing it on your own seems easy.
What I would do:
Create a wxEvtHandler-descendent class to hold the list of available "clients" in the network. Let this class have a wxCriticalSection, and use a wxCriticalSectionLocker for that in all methods that add or delete "clients".
Create a worker thread class by inheriting wxThread to handle your UDP datagrams, using blocking calls. The thread should directly call methods of the client list object whenever a client has to be added or removed. In these methods update the list of clients, and ::wxPostEvent() an event to itself (this will execute the whole notification calls in the main GUI thread).
Handle the event in the client list class, and notify all listeners that the list of clients has changed. The observer pattern seems to me a good fit. You could either call a method of all registered listeners directly, or send a wxCommandEvent to them.
Have you tried calling Update() on the widget(s) that change? Once you update the contents of the combo box, call Update(), and the contents should update.