#Caché

In this article I will show you how to build Universal JavaScript  applications using Caché (sharing your code across front- and back-end). But before we start writing code, I'll first give you some reasons and background why you should consider building your applications using this technology.

As I described in an earlier article on my CODE development blog, applications need to run these days on all kinds of devices and operating systems with different form factors and application development requires a new strategy. One can't keep using platform specific development tools anymore.

For those who are interested, or want to do something different with the cache language, I leave here two codes of animations.

They serve to run on the terminal while executing a routine, or a method.

To escape the monotony of seeing that static code in the terminal.

One of the internal changes in Cache 2016.2 is the switch from using Posix asynchronous IO on Linux platforms to native kernel asynchronous IO for improved performance. There is a kernel parameter that controls the maximum number of events that can be handled across the entire system and it is possible to hit this limit on newer versions of the Linux kernel when Cache is setting up disk IO structures in the WD or user processes. To prevent this from occurring we recommend that the kernel parameter 

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Embedded SQL is a tool that allows us to execute SQL statements in Caché Object Script. For example, to select the name of a person with a particular SSN from the Sample.Person class we can do the following.

The colon syntax is used to identify local variables, in this case tName and tSSN. &SQL indicates to our compiler that this is SQL syntax. At compile time, this statement will be optimized to executable Object Script code. More about this syntax can be found here.

http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=GSQL_esql

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This code snippet uses GZIP to compress and decompress a file in the file system. Change default file paths to customize code to compress/decompress your files:

Class objectscript.GZIP Extends %RegisteredObject
{
	classmethod test() {
		//Export Global(s) uncompressed
		set filename="C:\Temp\myglobal.xml"
		do $System.OBJ.Export("^oddEXTR.gbl",filename)
		//Open exported Globals
		set uncompressed = ##class(%FileBinaryStream).%New()
		set uncompressed.Filename=filename
		Set compressed = "C:\temp\mycomglobal.xml"
		//Open File Device over Gzip and Copy Uncompressed information to it
		Open compressed:("WUNK":::/GZIP=1:/NOXY=1:/OBUFSIZE=32768):0
		Use compressed
		do uncompressed.OutputToDevice()
		close compressed
		//Create New File  
		set out = ##class(%FileBinaryStream).%New()
		set out.Filename= "C:\Temp\decomp.xml"
		//Open compressed File and save information uncompressed over gzip
		Set file=##class(%File).%New(compressed)
		Do file.Open("RUK:::/GZIP=1:/NOXY=1")
		while ' file.AtEnd
		{
		    set line = file.ReadLine()
		    do out.Write(line)
		}
		do out.%Save()
	}
}

GitHub: https://github.com/intersystems-community/code-snippets/blob/master/src/cls/objectscript/GZIP.cls

Hi ,

     The below code is working in cache 5.02 but it'snot working cache 16.

      while we calling this method in another csp page it's show some different character.

      ClassMethod OnHTTPHeader(ByRef OutputBody As %Library.Boolean) As %Status [ ServerOnly = 1 ]
  {
set user = $ZUTIL(67,15,$JOB)
set status = %session.Login(username, "Test" ,1)
set log = $Get(%session.Data("Log")) 
set logtype = $Get(%session.Data("logtype")) 
if (log = "")
{
W !, "<div style='color:#000000; background:white; ; font-size=10pt;'><B>Your session has expired.

Overview

Current Caché system monitoring functionality provides real-time information about a Caché environment. This allows for preventative measures to be taken before system failure by highlighting specific metrics when they are at unusual or dangerous values. Additionally, diagnosis of past or current erronious events is aided by informative logs that are created by the system monitoring process.

The System Monitor Dashboard project is a successor to the current system monitoring functionality.

Hi All,

          while i configure the shadowing.i got following error.         

Thanks,

Prabakaran A. 

test post

TEst test

In our last lesson, we added a form to Edit our existing Widgets, and save them back to the server.  However, our Form was not well strcutured and our Save button had no intelligence, and was not fully visible.  So today, we will apply some Material components and Angular style to make the form more useful

Let's open EditWidget.csp, and make some changes.  First, we want to change the component from an md-card to an md-dialog.

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Test

1. What is this talk? • Provocative • Conflicting • Irritating • For those who want to be professional • Driver

2. What is this talk not? • Silver bullet • Only for devs Java • Only for devs • To be forgotten

3. Debt technical or "how to prevent the conductor knock on your door" - Alexandre Freire https://www.infoq.com/br/presentations/divida-tecnica- need-credit

4. Developers do not know fundamentals!

5. http://s3.amazonaws.com/magoo/ABAAAfWwoAD-5.jpg

6. bitly.com/resultadopesquisafusca bitly.com/pesquisafusca

7. Developers do not know how to make simple software!

As you know, Caché can be used as a relational DBMS working with JDBC/ODBC drivers and supporting the execution of arbitrary SQL queries and SQL procedure calls. 

We also know that Caché stores all the data in multi-dimensional sparse arrays called globals. It allows the developer not to use the standard CachéSQL engine in case a particular SQL procedure is underperforming, but instead rewrite its execution code in the Caché ObjectScript (COS) language intended for server-side business logic. This approach may help implement the optimal SQL procedure execution algorithm by using better-optimized NoSQL data structures (globals).

However, the standard class library in Caché has one limitation: for SQL procedures where data selection is controlled by custom COS code, you need to define the set of returned fields at the compilation stage - i.e. it is impossible to dynamically define metadata for an SQL procedure working with NoSQL structures. This article is about how to get around that limitation.

what is difference b/w zbreak and break ?

with some examples.

Exactly a year ago I posted this article about how it's possible to define mappings for packages, routines and globals in one place and have them apply to (almost) every namespace.

Hi,

I would like to list out unchecked mapped items ( classes in management portal )  classes of a particular namespace. Is there any code or terminal command which i can use ?

I am able to list out classes of namespace . But I need to list out unchecked mapped items classes

do ##class(%SYSTEM.OBJ).GetClassList(.result)

AI can be categorized in any number of ways, but here are two examples.

The first classifies AI systems as either weak AI or strong AI. Weak AI, also known as narrow AI, is an AI system that is designed and trained for a particular task. Virtual personal assistants, such as Apple's Siri, are a form of weak AI.

Strong AI, also known as artificial general intelligence, is an AI system with generalized human cognitive abilities so that when presented with an unfamiliar task, it has enough intelligence to find a solution.

Hi All,how to configure Crystal reports in IIS7.

test

Hi, I don't know if there is a bug in the function $zdate.

if i do:
w $zd("43433",4)  the result is    01/12/59

but if i do:
w $zd("64448",4) the result is   14/06/2017
 

Let us check whether this is available to others

Hello,

I'm just re-going through the Caché foundations course exercises using a copy of Try-Caché on my home pc.

I'm trying to create a web application to receive REST calls however, when I use the Restlet client I get no response.

My web application config is:

test

code

Hi,

I am new to Intersystems Cache. I have a requirement to replace $ZF("%ZSET_DIR","/hold/rsm") using Cache Class. Which class and which method i need to use

Thanks & Regards,

Sadagopan TS