WebSockets look to be supported reasonably well in Cache. I have yet to use them in production so I am wondering how well it has worked for other developers.
In particular what happens when the browser does not support WebSockets, or when a firewall blocks the connection.
Have you had to write your own long polling fall-back?
I've read the documentation and found this interesting article...
At the end of our last lesson, we ended with our page displaying a nice (but garish) Angular Material Toolbar, and our Widget data displaying in a list of Material cards. Our page feels a bit static, and we already know that the large number of Widgets that we will be dealing with will not be especially usable on a static list. What can we do to help?
We have a application developed in CSP and JS. Is there any way to make this application available in multiple language like Spanish etc.
We are ready to re-write the code in Zen also if it supports that feature.
Could any one of you please assist/advice a Solution to reach the required goal using Cache technologies, it will be a great help if someone has any sample code for the same.
I wonder if you could help me? I have a regular cache class that accepts a variable number of arguments in one of the methods. It works fine so I decided to add a method to my web service to make the call to the cache class. I get a compile error on the web service with error#5130.
I was wondering if the below query could be enhanced to automatically look back 24 hours from the current datetime the query is run. As is now I, of course, have to update the date range in the WHERE clause manually.
The query is just getting all MessageBodyClassNames, counting them and then doing an AVG on TimeCreated and TimeProcessed. Nothing too complex.
SELECT MessageBodyClassName, count(ID) as Count_Of_Messages, avg(datediff(ss, TimeCreated, TimeProcessed)) as avg_processing_time_in_seconds
If you are developing applications that use CSP or Zen, or potentially any of the other InterSystems web-related stuff that's built on top of CSP, then it's important to know how to keep one particular secret.
A central part of the CSP security architecture is a server-side session key. "Server-side" because its value should never be revealed to the client that is issuing the web requests. If it is revealed, a malicious client might be able to use it to bypass your security and make your server do things you don't want it to.
Code coverage and performance optimization of code has come up a bunch of times already, so most of you should already be aware of the SYS.MONLBL utility.
I'm trying to insert a relationship from a parent object instance to a child object instnace programmatically. Ie, i want to do:
Do parentObject.childRefProperty.Insert(chilDobject)
where childRefProperty is defined by a string. I feel this should be achievable with $PROPERTY and/or $METHOD or maybe something in $SYSTEM.OBJ.*, but can't quite figure it out. Anyone know?
We finished our last lesson with our Widgets Direct page receiving a Welcome message as a property of a JSON object, which was unpacked and displayed on the page. However, we are on Lesson 3, and we still haven't had any talk of displaying widgets yet.
I work with trigger and I need afeter update make INSERT into LogTable value of prorerty of saved class. This is what i have in this monent.
S className = ..%ClassName(1) S cls=##class(%Dictionary.CompiledClass).%OpenId(className) F i = 1:1:cls.Properties.Count() { S prop = cls.Properties.GetAt(i) S propName = prop.Name S value={propName*N} }
On the back of my recent post on writing bug-less code I wanted to raise a few suggestions (to ISC) that would help prevent certain types of bugs at compile time. I've probably missed a few, but these are the main ones in my mind. Please contribute more suggestions.
Btw, these also serve as potential gotchas for new COS developers.
Cache Studio almost always crashes when I click rows in Call Stack view during debugging. Then Cache has to be restarted because last edited file remains locked.
Looks like I'm the only one who uses the debugger. Or is there a magic spell to make stack view working?
I have some issue with trigger. I have class where I defined 3 triggers (UPDATE, INSERT, DELETE). These triggers are Foreach = row/object. In my currently task, I need overide this triggers in children class. is It possible to do it?
I'd like to know about what source control version is recommended to use with Caché / Ensemble. Can someone help me? If yes, there is some documentation to how to configure?
In this recent post I highlighted the importance of a CSP session's Key property in enforcing the level of security your web application may be relying on, and in particular the need to keep the property value secret.
By update
