#Caché

A few people wrote to me asking about the infrastructure behind the Atelier Server implementation. Its neat and a worthwhile story to share so I am writing it up here as a post on the community. I want to go in to a little detail on why it was needed and then I will outline in detail how we went about implementing this.

So why did we need to give people a “server in the cloud”?Atelier is the new IDE for InterSystems products.It is Eclipse based and implemented in Java so it is cross platform.The communication between the Atelier client and the server is REST based over http.

As some customers recently received new license keys, I received some questions why their new license does not seem to work, other than the expiration date being reached. So far I was able to solve all of them with this short list of things to look at.

1. Is the date on your laptop set properly?

2. For Europe (and possibly other regions): the expiration date in the cache.key file is in US format, MM/DD/YYY, while most people there are used to DD/MM/YYY. This is obvious if you have an expiration date like 11/30/2016, but not with dates like 3/12/2016 (expires in March, not December).

3.

What are the difference between Caché and Cache.

Is there a way to download just the studio and not have to download cache to get it?  

This text is a continuation of my article where I explained the structure a Caché database. In this article, I described the types of blocks, connections between them and their relation to globals. The article was purely theoretical. I made a project that helps visualize the block tree - and this article will explain how it works in great detail.

Hi,

Thanks a million for taking the time to read this.

I'm calling the functions $ZF(-`1, <path to EXE>) and $ZF(-2, <path to EXE>) from Cache code. The exact code I'm using in Cache Studio is given below.

/// Test the functionality of ZF(-1) and $ZF(-2), 
Class %SourceControl.UnitTest Extends %Persistent
{
Parameter PATH As %String = "E:\VCS\CommandExecutor\bin\Debug\WindowsApplication.exe";
ClassMethod Test()
{
Do $ZF(-2, ##Class(%SourceControl.UnitTest).#PATH)
}

Now when I run the command in the Cache Terminal, as given below,

>do $ZF(-2, "E:\VCS\CommandExecutor\bin\Debug\WindowsApplication.exe")

t

We have a very old green screen application which is currently producing PCL "documents". I want to update this to produce PDFs - are there any shortcuts / tips? I'm aware Zen Reports can allegedly do it, but I want to avoid that route if I can.

Hello,

First sorry for my english :)

I'm looking for a solution to reset the cursor of a query in a csp page.

In my code I do:

<csp:query name="users" classname="UserId" queryname="Find">
 <csp:while condition="users.Next()">
         ...
 </csp:while>

And 100 lines after I have to do exactly the same ...

Is it a way to do the while without do the query again ?

Something like users.Reset() ??

Thanks a lot for your help

Sébastien

I experience this constantly with Cache SQL.  Especially when querying the ATNA log.

SELECT TOP 400000 * FROM HS_IHE_ATNA_Repository.Aggregation ORDER BY ID DESC

That took 12 seconds.  I then upped the number to 500,000 and it took 185 seconds.

Shouldn't the execution time scale proportionately?

If I run the 500,00 query again it takes 2.4 seconds.

How to parse a URL in Caché:

Let's pretend you are working on a project where you may be retrieving a URL for some purpose and you have the need to be easily able to parse apart that URL to get the various components that make up the URL.

Here's how to do that:

Note:  This example assumes you have a variable named sURL that contains some url (i.e. http://www.intersys.com/main.csp?QUERY=abc#anchor) and you will be creating an array of the URL component pieces, where the array will be named aComponents.

In your class/routine, add the following code:

Do ##class(%Net.URLParser).Parse(sURL,.aComponents)

I have to connect to an external database and I'd like to use the JDBC SQL Gateway.

I followed this tutorial [1] to create a JDBC SQL Gateway and after configured it works as expected, but I don't know

how use this connection into source code. Maybe these other tutorial is related [2] and [3].

[1] http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY…

[2] https://community.intersystems.com/product-documentation/intersystems-p…

[3]

Hi

I have been working on changing a web application from using %FileBinaryStream to storing and serving the file content from a %Stream.GlobalBinary property, stored in a new database.  I have managed to migrate the data across, and have also been able to redirect the stream so that it is being served through the web link.  However, the previous method set attributes on the File stream to have the stream be rendered as the original file type through MIME, using this code

do stream.SetAttribute("ContentDisposition","inline; filename="_filecvt)

This method is not supported by

Hi, There

How to use open text file. I have a one file. the file is original file from excels file. After later convert to CSV file.

some cells has include cr+lf  control code. If i open and use from cache. reding time,Cache was wrong line feed point.

how do i edit my source code?

==============================================

s infile="c:\csvfile.csv"

o infile:"r"

1 u infile r line i $zeof<0 c infile q

   f i=1:1:10 s wd(i)=$p(line,",",i)

g 1

==============================================

Difference between function , routine and procedure in object script.

Background

Caché 2016.1 introduced some very powerful JSON features.  Unfortunately, the syntax used in the 2016.1 release is going to be changed in the 2016.2 release to bring it closer to Caché ObjectScript syntax.  This will mean that code that works in 2016.1 may not be forwards compatible.   See this announcement and this article for more details about the changes.

In order to try to minimize the volume of code which would not work in future Caché versions, the following recommendations and tools are being used internally within InterSystems for internal application JSON code being written

I can't able to access the management portal in tcp the cache is run on different port no 57812 plz i want immediate rply soon

Hi All,

    SPOOLER functionality is support in Cache 16?
    Previously we are using cache 5,Now we upgraded cache(cache 16).
    Is any changes required in SPOOLER set-up (Cache 16)?    
    
Thanks,
Sansa    

This sample class will add parameter DSINTERVAL to each class containing the parameter DSTIME

To execute it from a Terminal :

SAMPLES>d ##class(adm.param).add(,,1)
[SAMPLES] parameter DSINTERVAL=5 added to class DeepSee.Study.CityRainfall (via adm.param)
[SAMPLES] parameter DSINTERVAL=5 added to class HoleFoods.Transaction (via adm.param)
[SAMPLES] parameter DSINTERVAL=5 added to class News.DeepSee.NewsArticle (via adm.param)
DSINTERVAL parameter was added to 3 classes

Class adm.param [ Abstract ]
{

/// this class will add DSINTERVAL parameter to each class containing DSTIME
///

Good Morning and thanks in advance for all replies.  I have created a PowerShell script for backing up CACHE and all related files to be run on a nightly basis.  My script works as long as the Unknownuser has %all access which is not acceptable in our production environment.  I have tried every format I can thank of to get the script to use a specific id with no luck.  How can I get this command to run under a specific id? 

..\bin\cache -s. -U%SYS "##Class(Backup.General).ExternalFreeze() <d:\backup\login.scr" 

The file just has

userid`r`n
​password`r`n

`r. For a carriage return and a new

NewBie's Corner Session 27 Traversing A Global with $Order Part 1

Welcome to NewBie's Corner, a weekly or biweekly post covering basic Caché Material.

Traversing A Global

Perhaps the most difficult concept in Caché/MUMPS is its Global Structure. This session and several that follow it deals with the Global Structure. However, just presenting the material will not guarantee your understanding of it. You must experiment with the data and concepts that are presented.

In this session, we are going to create a small Global of three levels deep, and then show the code to Traverse the Global.

The

NewBie's Corner Session 28 Various Methods to Traverse a Global

Welcome to NewBie's Corner, a weekly or biweekly post covering basic Caché Material.

Judging from the number of responses to Session 27 Traversing A Global, developers are passionate about their methods. I am not here to judge the merit of the various methods.

Over the next few pages I will demonstrate a number of methods to Traverse a Global. If you don't already have a favorite they may help you pick one.

I will repeat the method from Session 27 just to have all methods in one post.

There may be variations on these methods and

Hello, guys.

I need to copy the text from one stream to another filestream and save it. I am using  

do fileStream.CopyFromAndSave(rtn.Code)

However, if "rtn" stream contains Russian characters I get something like "???". Is there any way to convert stream to Unicode?  Something like $zc(str, "O", "UTF8") for streams.

Hi all,

This is a real long shot, but does anyone have experience integrating MS wsHttpBinding with a Cache application?

Link 

I ask because my project had some initial design discussions for new web service communication and this specification was mentioned. 

Thanks.

Hello, guys. 

I found one interesting moment in Cache Object Script. It doesn't have(or at least I didn't find) trimming function. By trimming I mean if a string has some whitespaces/tabs/carriage returns from very beginning or/and from very right, this function removes them. 

  I have found several workaround ways. 

1. Using Cache Basic

ClassMethod TrimCacheBasic(str As %String) As %String [ Language = basic ]{Return Trim(str)}

2. Using SQL

ClassMethod TrimSQL(str As %String) As %String
{
	set tStatement = ##class(%SQL.Statement).%New()
	set tSC = tStatement.%Prepare("SELECT TRIM(?)")

I'm following the tutorial here.  When I try to call the default Test() method I get the following error:

An error occurred with the CSP application and has been logged to system error log (^ERRORS)

I found this document which says I need to make the "Web Application" accessible by running a couple commands.  I'm not even sure I created a Web Application.  Regardless, I tried a few variants but still get the same error.

Here is the URL for the Service Catalog: /csp/healthshare/mhclib/Custom.MHC.Scott.ServiceTest.cls

I tried different things including these two:

Checking if Directory or File Exists:

Outlined below is an example of how to check if a directory exists:

Set directoryName="c:\temp\nosuchdir"

/* Check for existence of a directory - Return Value:  0 - directory does not exist;  1 - directory does exist  */

Set directoryExists=##class(%File).DirectoryExists(directoryName)

If ('directoryExists)  // do the processing for when a directory does not exist

Outlined below is an example of how to check if a file exists:

Set fileName="a_test_filename.txt"

/* Check for existence of a file- Return Value:  0 - filename does not exist;  1 -

The one question that some of you might have is:  

How do I change my login information for Cache Studio if I clicked the checkbox to automatically save my login info so I do not have to enter my username/password every time I open Studio?
 

Well.....excellent question!!!!!!

Here's the answer:  

Bring up Studio and press F4 (or go to File menu -> Change Namespace) - when the Change Namespace box appears - click on the [Connect] button and you can select the server you want to connect to and it will re-prompt you for your login credentials -- at that point change the Cache Account to whatever

Hi all,

We're creating a series of RESTful APIs that output data from a Cache database (made up of global storage that we've mapped to classes). I'm running into some problems with object-to-JSON conversions when relationships are involved. Eg:

ParentClass has children relationship to ChildClass

ChildClass has parent relationship to ParentClass

If you %WriteJSONFromObject on an instance of ChildClass, it will retrieve the instance of ChildClass you're asking for, and it will retrieve the ParentClass as a JSON sub object, via the parent relationship (this part is OK), AND it will retrieve EVERY

Click here to view our OAuth 2.0 Overview

InterSystems created this video as a high-level overview of OAuth 2.0 technology, geared toward developers looking to learn the basics of OAuth 2.0.  It will teach you how OAuth 2.0 works, what roles are involved, what benefits it can provide, and how InterSystems Caché can be used with this technology.

I have a class with a string property with DISPLAYLIST and VALUELIST parameters specified.

When I query this class via ODBC I receive logical value as it is and not a display value.

Is there any way (without stored procedure) to get display value?