I am trying to read some binary data from a local file or through socket.

The binary data is like H.264 codec, I need to read data BYTE by BYTE (even BIT by BIT) and decide the next step based on the data read so far.

I check the documentation and it seems like most of the sample focus on human readable IO, ie: LINE by LINE.

Could I achieve my goal through COS?

Thanks.

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I'm using cache win10-x64 version 2017.2.1.801

I want to uniquely identify the installation of cache, and from that create a meaningful unique folder names to store files.

so to generate \192-168-1-100\KEVDEV\testfolder \ and \192-168-1-5\LIVE\testfolder\

so in this case, I could- use the IPaddress and thesecond part of $SYSTEM (cache instance name) - at least this way, I can instantly see where it came from with little risk of overwriting between cache instance.

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Question
· Aug 12, 2020
dotnet core

Is there an InterSystems supported dotnet core library or community contributed repo on the horizon? At this time we are exploring installing the ODBC driver in our containers but would rather use more robust solution.

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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?

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Article
· Jul 18, 2016 15m read
Remote proxy objects via dynamic dispatch

This article created as side effect of preparations to the longer set of articles about simple, but still handy MapReduce implementation in Caché. I was looking for relatively easy way to pass arguments to (potentially) multiple targets via remote calling facilities. And after several attempts I have realized that we do have very powerful mechanism in the Caché ObjectScript which might be of particular help here – dynamic dispatch for methods and properties.

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Hi Community

I have created a simple package that allows the use of Cache with the Laravel Framework.

From my initial testing everything seems to be operating smoothly but I would like to appeal to the PHP users in the community to help me improve this package.

For those of you out there who have time and would be interested in this, please visit the repo at https://github.com/jeandormehl/laracache

Thanks in advance

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Hello.

I want to store a mailbox in Caché, persistently.

Does anyone have some code for downloading all messages from mailbox into Caché? And maybe automatic syncing after download? I know, there is %Net.POP3 but maybe someone has already done that.

Thank you.

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Question
· Oct 30, 2018
ID vs %ID in tables

What is the difference between %ID and ID in a database table? Both seem to reference the same column labelled ID.

For context, I am trying to create a viewer class for an existing persistent class.

Let us call the persistent class A, with SqlTableName = OldA.

The viewer class will be B with SqlTableName = A and ViewQuery = {select %ID, <other fields> from <some other class with the same fields as A>}

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I bet that not everyone familiar with InterSystems Caché knows about Studio extensions for working with the source code. You can actually use the Studio to create your own type of source code, compile it into interpretable (INT) and object code, and sometimes even add code completion support. That is, theoretically, you can make the Studio support any programming language that will be executed by the DBMS just as well as Caché ObjectScript. In this article, I will give you a simple example of writing programs in Caché Studio using a language that resembles JavaScript. If you are interested, please read along.

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Article
· Mar 18, 2018 1m read
Replacing ZEN - Index to articles

Hi All
This is the index to a series of articles I hope to create over the coming months.

ZEN and ZEN Mojo are no longer being actively developed by Intesystems - this is a great shame as it is a fine product that works so well for business applications.
However ZEN is a 15 year old product and I need a path forward to replace the ZEN UI with a supported development framework.

This article is an index of the other articles I have, or plan to write. - the articles will be subject to change as I develop my thoughts and climb the learning curve.

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Advent of Code is a series of 25 small programming challenges, it's an ideal way for beginners to start learning a computer language, and for advanced people to sharpen their programming skills.

There are small and bigger puzzles, which you can solve typically in half an hour to a few hours. (Looking at the leaderboard, the top aces can do them in less than 10 minutes.)

Advent of Code is created by Eric Wastl, you can find all info on https://adventofcode.com/.

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Question
· Feb 9, 2018
SQL prepare error

I'm trying to learn how To use SQL in CACHE, so I hope I don't bore you with "Dumb" questions....

I'm getting "ERROR #6022: Gateway failed" message following this line of code.

s sc=gc.Prepare(hstmt,pQuery) 

This line of code comes from an example I found in the documentation. pQuery is the "Select" statement setting up the variables and tables I'm trying to pull information from.

What does that error indicate?

Thank you.

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Hi all.

I have a process/operation within Ensemble that grabs a PDF from a webservice, and then saves it to an external location. All is well, except I am noticing that a lot of .Stream files are being stored on the Cache Server.

Does anyone know what causes these to be stored and what would trigger their removal? Would I be right to assume these would be removed if I ran Ens.Util.Tasks.PurgeMessageBank and the creation dates fell within the purge range?

Edit: I answered my own question on if the purge would clear them out. The answer is yes.

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