InterSystems ObjectScript is a scripting language to operate with data using any data model of InterSystems Data Platform (Objects, Relational, Key-Value, Document, Globals) and to develop business logic for serverside applications on InterSystems Data Platform.
Say you have a DICOM document with an input information sequence with many sequence items. You could access every item one by one by looping and querying the path by passing it to the GetValueAt method as demonsrated below.
This works but there are some performance issues on my system if the document has to be read for each query (as far as I know, that is the case on my system). Is there a way of querying a path, which would return the sequence items as an array? I think I am missing something. With 900 items the process takes around 20 seconds currently.
In many projects I was faced with storing hierarchical data (tree) in classes. By tree, I mean such data, where each node has a parent node — an object of the same class. Many examples of such data can be given. For example, a catalog in the online store. Suppose that this online store sells books, in this case, the category tree might look like this:
I must be missing something. We have done encoded PDF's in the past with the Encoded PDF in OBX.5.5. When I have used this code in the past I was only working with 1 OBX, but I have a case where I am having multiple OBX's and having to loop through them and I am renumbering the outbound OBX.
Lets imagine that there's a process that locks an entry of a gived domain, in my example the ID 2 of the table User.tApplications and using an exclusive lock. Additionally the error handling is managed by a $ETrap routine wich will look for error data in order to log it
I have one persistent, xml-enabled class. I need to convert objects of this class to XML. However I need to project each object in different ways (depending on where I send it), for example:
I'm facing the error 7802 ("Worker job/s unexpectedly shut down") when trying to work with the Queue Manager. Since today it was working fine, but suddenly today it started failing when arriving to the line:
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PHP, from the beginning of its time, is renowned (and criticized) for supporting integration with a lot of libraries, as well as with almost all the DB existing on the market. However, for some mysterious reasons, it did not support hierarchical databases on the globals.
Globals are structures for storing hierarchical information. They are somewhat similar to key-value database with the only difference being that the key can be multi-level:
Object Synchronization is a feature that has been around for a while, since Caché days, but I wanted to explore a bit more how it works. I've always thought that database automatic synchronization is complex by nature but, for some particular scenarios shouldn't be so hard. So I considered a very simple use case (OK, perhaps the typical one, I'm not discovering anything... but if it's common and it works, it's good ).
After upgrading I ran a $SYSTEM.OBJ.CompileAllNamespaces("u"). What I got in return was kind of a shock.
In reviewing errors I am seeing code being referenced but no longer applies. It is referring to stuff that might of been defined in the Context , Formal Spec ,Thread , etc.
ERROR #5373: Class 'osuwmc.CPD.DataStructures.TblPharmacyDEA', used by 'osuwmc.CPD.BusinessOperation:SelectProviderTempDEA:FormalSpec', does not exist
As you may know, we successfully held InterSystems Developers Meetup in Boston at Global Summit 2019. And now it's time to find out which solutions development on InterSystems IRIS have been discussed!
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When you prepare your modules for ZPM (InterSystems Package Manager) it expects the certain directory structure for ObjectScript source files.
ObjectScript in your source folder need to be stored by types in the following subfolders. E.g. if you have the source folder named as /src the structure should be as follows:
This code snippet sends an XML request to a server and saves the response to a file. The class method "test" runs the code:
Class objectscript.postXML
{
classmethod test() {
Set HTTPRequest = ##class(%Net.HttpRequest).%New()
Set HTTPRequest.ContentType = "text/xml"
Set HTTPRequest.NoDefaultContentCharset = 1
Set HTTPRequest.Location = "ITOMCZ"
Set HTTPRequest.Server = "wph.foactive.com"
Do HTTPRequest.RemoveHeader("User-Agent")
Do HTTPRequest.RemoveHeader("Accept-Encoding")
Do HTTPRequest.RemoveHeader("Connection")
Do HTTPRequest.SetHeader("Expect","100-continue")
Set RequestXML = ##class(%Library.File).%New("c:\test.xml")
Do RequestXML.Open("RS")
Do HTTPRequest.EntityBody.CopyFrom(RequestXML)
Do RequestXML.%Close()
Do HTTPRequest.Post(HTTPRequest.Location)
Do $System.OBJ.Dump(HTTPRequest)
Do $System.OBJ.Dump(HTTPRequest.HttpResponse)
Write HTTPRequest.HttpResponse.Data.Size
Write HTTPRequest.ContentLength
Set ResponseStream = ##class(%Stream.FileBinary).%New()
// Second part is typically the file extension, i.e.: application/pdf -> pdf
Set FileType = $Piece(HTTPRequest.HttpResponse.GetHeader("CONTENT-TYPE"),"/",2)
Set ResponseStream.Filename = "C:\test."_FileType
Write ResponseStream.CopyFrom(HTTPRequest.HttpResponse.Data)
Write ResponseStream.%Save()
Do ResponseStream.%Close()
}
}
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I am currently looking for a Cache ObjectScript Developer. Please see job description below. If you are interested please send an email to paul.lilienfeld@libertyits.com
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The Caché / Ensemble standard distribution contains in namespace SAMPLES a nice example of a CSP page consuming WebService as a Client. I have modified it not only to display the replies but to feed them back into a Global. I used the classic Hyperevent to achieve this. The replies end up as a log in global^WSREPLY. When there is no input anymore the page closes and goes away.
There are 2 versions with visible and hidden display during operation. dc.WSCSP.reverseVerbose.cls and dc.WSCSP.reverseHidden.cls
During testing your code you are often confronted with the need to examine the actual content of an object. Either using ZWRITE or $system.OBJ.Dump() you get a picture of simple properties as "--- attribute values ---" while "--- swizzled references ---" are more confusing than informative and with "--- calculated references ---" you are just left in the lurch.
This small helper class allows you to dump an object to terminal or e.g in background to some stream for later review. By default, you see just properties with content,
The class method "test" in the following code snippet sends an HTML email with an embedded image. Edit the literal strings to change the embedded image, to address, from address, subject, and body of the email.
How Tax Service, OpenStreetMap, and InterSystems IRIS could help developers get clean addresses
Pieter Brueghel the Younger, Paying the Tax (The Tax Collector), 1640
In my previous article, we just skimmed the surface of objects. Let's continue our reconnaissance. Today's topic is a tough one. It's not quite BIG DATA, but it's still the data not easy to work with: we're talking about fairly large amounts of data. It won't all fit into RAM at once, and some of it won't even fit on the drive (not due to lack of space, but because there's a lot of junk). The name of our subject is FIAS DB: the Federal Information Address System database - the databases of addresses in Russia. The archive is 5.5 GB. And it's a compressed XML file. After extraction, it will be a full 53 GB (set aside 110 GB for extraction). And when you start to parse and convert it, that 110 GB won't be enough. There won't be enough RAM either.
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PHP, from the beginning of its time, is renowned (and criticized) for supporting integration with a lot of libraries, as well as with almost all the DB existing on the market. However, for some mysterious reasons, it did not support hierarchical databases on the globals.
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