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Dmitry Maslennikov · Oct 15, 2017

Unfortunately, downloading distributions from WRC is not so easy. For example, you can look at my article Containerization Caché, where I gave an example how to download and install Caché automatically.

Before, we need some variables

product=cache
version=2017.2.0.744.0
arch=lnxrhx64

Download distribution

# WRC Authorization
WRC_USERNAME="user@somecompany.com"
WRC_PASSWORD="password"

wget -qO /dev/null --keep-session-cookies --save-cookies /dev/stdout --post-data="UserName=$WRC_USERNAME&Password=$WRC_PASSWORD" 'https://login.intersystems.com/login/SSO.UI.Login.cls?referrer=https%253A//wrc.intersystems.com/wrc/login.csp' \
 | wget -O - --load-cookies /dev/stdin "https://wrc.intersystems.com/wrc/WRC.StreamServer.cls?FILE=/wrc/distrib/$product-$version-$arch.tar.gz" \
 | tar xvfzC - .

before an upgrade, you should define at least one variable as defined in documentation by your link.

ISC_PACKAGE_INSTANCENAME=$product

for install new instance, you should define more variables

ISC_PACKAGE_INSTALLDIR="/usr/cachesys/"
ISC_PACKAGE_UNICODE="Y"

so, finally, the script will be

#!/bin/bash

product=cache
version=2017.2.0.744.0
arch=lnxrhx64

# WRC Authorization
WRC_USERNAME="user@somecompany.com"
WRC_PASSWORD="password"

wget -qO /dev/null --keep-session-cookies --save-cookies /dev/stdout --post-data="UserName=$WRC_USERNAME&Password=$WRC_PASSWORD" 'https://login.intersystems.com/login/SSO.UI.Login.cls?referrer=https%253A//wrc.intersystems.com/wrc/login.csp' \
 | wget -O - --load-cookies /dev/stdin "https://wrc.intersystems.com/wrc/WRC.StreamServer.cls?FILE=/wrc/distrib/$product-$version-$arch.tar.gz" \
 | tar xvfzC - .


ISC_PACKAGE_INSTANCENAME=$product

/tmp/dsitrib/$product-$version-$arch/cinstall_silent

But it is just a simple example and not covers everything. But can be easily extended by your needs.

Dmitry Maslennikov · Sep 28, 2017

{value1,value2, value3} - is incorrect in JSON

In JSON we have objects and arrays, every element in an object has name and value, while an array is a just list of values.

So, object in this format.

{
  "name": "value",
  "name2": "value2"
}

And array 

[ "value1", "value2" ]

And anyway not sure what you want to do.

Look at this article in the documentation about working with JSON in Caché.

set arr = ["value1", "value2", "value3"]
set iter = arr.%GetIterator()
write !,"<switch> my value"
while iter.%GetNext(.key, .value) {
  w !,"<case>",value,"</case>"
}
w !,"</switch>"
Dmitry Maslennikov · Sep 18, 2017

You can retrieve list of certificates in a way like this

ClassMethod SSLConfigs() As %String
{
  new $namespace
  set $namespace = "%SYS"
  
  set rs=##class(Security.SSLConfigs).ListNamesFunc()
  set result = ""
  while rs.%Next() {
    set result = result_$lb(rs.Name)
  }
  quit result
}

And result will be in $lb

USER>w $lts(##class(User.Test).SSLConfigs())
Amazon,Google,ISC.FeatureTracker.SSL.Config
Dmitry Maslennikov · Sep 18, 2017

This error may be thrown by some different reasons while you call %Save for an object.

In my case at this place "%Save+5" I have a call to method %BuildObjectGraph, which is internal in %RegisteredObject class. Described as "Build the list of reachable objects and their dependencies".  This method calls recursively, so, maybe some troubles with dependencies.

Dmitry Maslennikov · Sep 13, 2017

Not, we don't have $listprevious. And I can say why.

$listbuild format quite simple where each element of $listbuild is solid. It has header and data, where in the header we have the length of data. So, to get next element, we just have to read header and ptr used to set position where header begins. 

But when you want to read the previous element, you can't know how long this previous value, and you can't find this right place, you still have to read from the beginning.

So, only one way to do it:

for i=$listlength(myList):-1:1