Ensemble

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The code of %Z.obj is available on Open Exchange.

During testing your code you are 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.

Last comment 9 days ago
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This example is extracted from a long-running installation. The purpose is to have a simple monitoring of several servers at a rather primitive level. Just slightly more intelligent than a raw PING. But still easy to integrate. It avoids the overkill of information you are often confronted with while you are just interested in the number of active process or similar basic figures.

The code is available for you on Open Exchange too.

Last comment 30 May 2019
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Has anyone tried the new Activity Volume Statistics and Monitoring  in Ensembel 2016.1? I would love to get some feedback.

If you haven't read about this, there is a dashboard that provides counts and response times for messages sent and received by each configuration item. Alternatively the underlying data is arranged in tables that should make it easy for you to use your favorite SQL reporting tools to generate reports for short term performance monitoring or longer term capacity planning.

Dave

Last comment 25 April 2019
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The %Net.SSH.Session class lets you connect to servers using SSH. It's most commonly used with SFTP, especially in the FTP inbound and outbound adaptors.

In this article, I'm going to give a quick example of how to connect to an SSH server using the class, describe your options for authenticating, and how to debug when things go wrong.

Here's an example of making the connection:

Last comment 25 April 2019
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IRIS and Ensemble are designed to act as an ESB/EAI. This mean they are build to process lots of small messages.

But some times, in real life we have to use them as ETL. The down side is not that they can't do so, but it can take a long time to process millions of row at once.

To improve performance, I have created a new SQLOutboundAdaptor who only works with JDBC.

BatchSqlOutboundAdapter

Extend EnsLib.SQL.OutboundAdapter to add batch batch and fetch support on JDBC connection.

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 For Data Synchronization inside Caché you have a range of ways to synchronize objects and tables.
At DB level you can use Shadowing  or Mirroring 

This works excellent and if you need just a part of your data to be synchronized you may split your
data into smaller pieces using Global mapping 
Or if you need bi-directional synchronization on Class/Table level you can use the Object Synchronization Feature 


The limit of all these excellent features:
They just work from Caché/IRIS to Caché/IRIS.

Last comment 8 April 2019
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Database systems have very specific backup requirements that in enterprise deployments require forethought and planning. For database systems, the operational goal of a backup solution is to create a copy of the data in a state that is equivalent to when application is shut down gracefully.  Application consistent backups meet these requirements and Caché provides a set of APIs that facilitate the integration with external solutions to achieve this level of backup consistency.

Last comment 18 March 2019
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A quick start guide to connect Ensemble to RabbitMQ using the RabbitMQ Java Client, a Java proxy class and the Ensemble Java Gateway.

Word and PDF documentation, source code and utilities available at https://github.com/toncat/ensemble2rabbitmq.


Software Versions

Server
- Windows Server 2012 R2 x64
- Erlang OTP 19.1
- RabbitMQ Server 3.6.5
- RabbitMQ Java Client 3.6.5

Last comment 4 March 2019
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1. Blockchain

As I am writing this article, Bitcoin costs less than one-fifth of what it used to be at the pinnacle of its success. So when I start telling someone about my blockchain experience, the first thing I hear is undisguised skepticism: "who needs this blockchain stuff now anyway?"

That's right, the blockchain hype has waned. However, the technologies it is based on are here to stay and will continue being used in particular areas.The Internet in general offer tons of materials describing the general usage of these technologies 

Last comment 21 February 2019
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WebSockets as a communication technology wins increasing importance.
In the SAMPLES namespace, you find a nice example for running a WebSocket Server.
There is also a useful example for a Browser Client. But it is still in the browser. 

My point is:
How to consume the output of a WebSocket Server in your application?

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WebSockets as a communication technology wins increasing importance.
In the SAMPLES namespace, you find a nice example for running a WebSocket Server.
There is also a useful example for a Browser Client. JavaScript does most of the work. 

My point is:
How to consume the output of a WebSocket Server in your application?

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Recently I needed a classmethod that returns annotation value based on a name of a activity.

As doing it at runtime seemed inefficient, I wrote compile-time utility that iterates over all business process activities and generates relevant code.

This code could be used in a variety of situations when you need to iterate over business process activities, just add it as a secondary superclass to your BPL processes.

Last comment 27 January 2019
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GraphQL is a standard for declaring data structures and methods of data access that serves as a middleware layer between the client and the server. If you’ve never heard about GraphQL, here is a couple of useful online resources: here, here and here.

In this article, I will tell you how you can use GraphQL in your projects based on InterSystems technologies.

Last comment 22 January 2019
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(Originally posted by @Benjamin Spead on June 25, 2014)

This code snippet generates a list of Ensemble Lookup Tables and Schema documents in the user's current namespace. Run the code by running the class method "test":


Class benspead.EnsTablesSchema
{
    classmethod test() {
        If ##class(%Dictionary.CompiledClass).%ExistsId("Ens.Util.LookupTableDocument") {
            // only supported in Ensemble 2012.1+
            Write !,!,"Exporting Ensemble Lookup Tables..."
            Set sc = $$$OK
            Set rs = ##class(%ResultSet).%New("Ens.Util.LookupTableDocument:List")
            Do rs.Execute()
            While rs.Next() {
                Set item=rs.Data("name")
                Write "document found: "_ item,!
            }
            Do rs.Close()
            Set rs=""
        }
        If ##class(%Dictionary.CompiledClass).%ExistsId("EnsLib.HL7.SchemaDocument") {
            Write !,!,"Exporting Ensemble HL7 Schemas..."
            Set sc = $$$OK
            Set rs = ##class(%ResultSet).%New("EnsLib.HL7.SchemaDocument:List")
            Do rs.Execute()
            While rs.Next() {
                Set item=rs.Data("name")
                Continue:$listfind($lb("2.1.HL7","2.2.HL7","2.3.HL7","2.4.HL7","2.5.HL7","2.6.HL7","2.7.HL7","2.3.1.HL7","2.5.1.HL7","2.7.1.HL7","ITK.HL7")
                                    ,item)
                Write "document found: "_ item,!
            }
            Do rs.Close()
            Set rs=""
        }
    }
}

Here's a link to the code on GitHub: https://github.com/intersystems-community/code-snippets/blob/master/src/...

Last comment 16 December 2018
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Not everyone knows that InterSystems Caché has a built-in tool for code profiling called Caché Monitor.

Its main purpose (obviously) is the collection of statistics for programs running in Caché. It can provide statistics by program, as well as detailed Line-by-Line statistics for each program.

Using Caché Monitor

Let’s take a look at a potential use case for Caché Monitor and its key features. So, in order to start the profiler, you need to go to the terminal and switch to the namespace that you want to monitor, then launch the %SYS.MONLBL system routine:

Last comment 14 December 2018
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Mirroring 101

Caché mirroring is a reliable, inexpensive, and easy to implement high availability and disaster recovery solution for Caché and Ensemble-based applications. Mirroring provides automatic failover under a broad range of planned and unplanned outage scenarios, with application recovery time typically limited to seconds. Logical data replication eliminates storage as a single point of failure and a source of data corruption. Upgrades can be executed with little or no downtime.

Last comment 8 December 2018
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EnsLib.HL7.Message.cls provides many API methods for manipulating an HL7 message.  RemoveSegmentAt(), for example, can be used to remove a segment by path or index, but only one segment at a time.   There may be times that you'll need to remove all segments within a group or even many groups of segments from the HL7 message.  Surely you can iterate through each segment in each group and remove them one by one, but there's a much easier way. 

 

With just one command, like below, you can remove all OBX segments in an ORU_R01 message (msg):

Last comment 14 November 2018
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Continuing on with providing some examples of various storage technologies and their performance profiles, this time we looked at the growing trend of leveraging internal commodity-based server storage, specifically the new HPE Cloudline 3150 Gen10 AMD processor-based single socket servers with two 3.2TB Samsung  PM1725a NVMe drives.  

Last comment 29 October 2018
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Hi Community!

As you know we launched the InterSystems Open Exchange — the marketplace for solutions and tools on InterSystems Data Platforms!

But how to publish your application on OE?

Before we start, let me answer the few basic questions.

Last comment 24 October 2018
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Ensemble supports publish and subscribe message delivery. Publish and subscribe refers to the technique of routing a message to one or more subscribers based on the fact that those subscribers have previously registered to be notified about messages on a specific topic.

This article demonstrates how several Ensemble capabilities can work together:

In this article we would send emails about:

  • New workflow tasks
  • Unassigned workflow tasks
  • Uncompleted workflow tasks
  • Ensemble alerts

Email recipients would be determined using Publish/Subscribe operation and each user would receive only digest email whenever possible.

Last comment 23 October 2018
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This article will provide tips and tricks on customizing Ensemble business hosts with configurable settings.

Ensemble production Settings are configurable values that control the behavior of a production and its hosts.

The documentation for adding and removing Settings and specifying categories and controls for Settings is provided at the link:

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

Last comment 9 October 2018
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Below is a simple alert processor based on the EnsLib.HTTP.OutboundAdapter  to send text alerts via an SMS Gateway service. Typically, all that is needed to send an HTTP Post to the gateway service is the destination phone number, a source phone number, credentials, and the URL.

The code below is based on the Anveo gateway whose interface is as follows:

Last comment 10 September 2018
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