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.
Server
- Windows Server 2012 R2 x64
- Erlang OTP 19.1
- RabbitMQ Server 3.6.5
- RabbitMQ Java Client 3.6.5
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
Is there a system function/method which can create a GUID ?
Date range queries going too slow for you? SQL Performance got you down? I have one weird trick that might just help you out! (SQL Developers hate this!)*
If you have a class that records timestamps when the data is added, then that data will be in sequence with your IDKEY values - that is, TimeStamp1 < TimeStamp2 if and only if ID1 < ID2 for all IDs and TimeStamp values in table - then you can use this knowledge to increase performance for queries against TimeStamp ranges. Consider the following table:
Hello everyone!
Does anyone know of a library that can be used to create Mock objects for Objectscript classes?
Right now, my team has been building mock objects by hand to help circumvent dependencies when writing and executing unit tests, but I always wondered if someone had ever created a Mock library like Mockito to help quicken the process.
Thanks!
Here are a few examples of conversions and operations you might need, along with links to documentation where you can learn more.
At the time I wrote this, Eastern Daylight Time was in effect for my Caché system.
Caché has a simple time format, with a longer range of recognized dates compared to some other technologies.
The current time is maintained in a special variable $HOROLOG ($H):
The message viewer can resend messages but it is not suitable for resending a large number of messages (>100). For that, you should use Cache Object Script code such as the following:
How can I round to the next whole number?
.1 = 1
1.2 = 2
1.7 = 2
In this article we are going to compare $Increment and $Sequence functions.
This tool is used to generate random read Input/Output (IO) from within the database. The goal of this tool is to drive as many jobs as possible to achieve target IOPS and ensure acceptable disk response times are sustained. Results gathered from the IO tests will vary from configuration to configuration based on the IO sub-system. Before running these tests ensure corresponding operating system and storage level monitoring are configured to capture IO performance metrics for later analysis.
As a developer, you have probably spent at least some time writing repetetive code. You may have even found yourself wishing you could generate the code programmatically. If this sounds familiar, this article is for you!
We'll start with an example. Note: the following examples use the %DynamicObject interface, which requires Caché 2016.2 or later. If you are unfamiliar with this class, check out the documentation here: Using JSON in Caché. It's really cool!
Hello!
This article is a small overview of a tool that helps to understand classes and their structure inside the InterSystems products: from IRIS to Caché, Ensemble, HealthShare.
In short, it visualizes a class or an entire package, shows the relations between classes and provides all the possible information to developers and team leads without making them go to Studio and examine the code there.
If you are learning InterSystems products, reviewing projects a lot or just interested in something new in InterSystems Technology solutions — you are more than welcome to read the overview of ObjectScript Class Explorer!
Can I connect to Cache using SSMS (SQL Server Management Studio) and view schemas and build queries as I do for SQL Server?
If yes, step-by-step instructions for setting up the connection would be greatly appreciated.
I googled the topic but didn't find any results that were on target.
Thanks,
Christian Bahnsen
In this article I'll describe how to set up web services and/or REST services using EWD 3.
Since EWD 3 is designed to be modular, you can construct the environment that exactly meets your needs, but for much of the time you'll probably find that the pre-built EWD 3 ewd-xpress super-module does most of what you need because it hooks together all the core EWD 3 and other building-blocks you'll need:
The topic of for/while loop performance in Caché ObjectScript came up in discussion recently, and I'd like to share some thoughts/best practices with the rest of the community. While this is a basic topic in itself, it's easy to overlook the performance implications of otherwise-reasonable approaches.
The select query here "select Settings from Ens_Config.Item" in the SQL Query of management portal returns this:
ValidationHost 7ActOnTransformErrorHost1 ReplyCodeActionsHostE=D AlertOnErrorHost1 9 AlertGroupsHost$LabAlertGroup,1-CriticalAlertGroup BusinessPartnerHost
How do I isolate just one of the settings e.g. ReplyCodeActions or LocalInterface
For example, i want to search for all entries that have a value for ReplyCodeActions
I realize i can open the production in studio and search for those setting values.
For each defined property, query or an index, several corresponding methods would be automatically generated on a class compilation. These methods can be very useful. In this article, I would describe some of them.
Presenter: Dan Kutac
Task: Use a common login identity and a central mechanism of authentication across environments from multiple entities
Approach: Provide examples and code samples of an application environment using OpenID Connect and OAuth 2.0
Description: In this session we will demonstrate an application environment using OpenID Connect and OAuth 2.0. Hear how this is done and what options you have; and yes, you get to keep the code.
Problem: How to use a a common login identity (e.g. Facebook credentials) and a central mechanism of authorization cross environments from multiple entities.
Solution: Create awareness and interest in using OAuth 2.0
Content related to this session, including slides, video and additional learning content can be found here.
Has anyone tried using Server-Sent Events with Caché/HealthShare/Ensemble and angularjs?
Just like Caché pattern matching, Regular Expressions can be used in Caché to identify patterns in text data – only with a much higher expressive power. This article provides a brief introduction into Regular Expressions and what you can do with it in Caché. The information provided herein is based on various sources, most notably the book “Mastering Regular Expressions” by Jeffrey Friedl and of course the Caché online documentation. The article is not intended to discuss all the possibilities and details of regular expressions. Please refer to the information sources listed in chapter 5 if you would like to learn more. If you prefer to read off-line you can also download the PDF version of this article.
Caché process failures on RHEL V7.2
InterSystems WRC has investigated several issues of process failure that can be attributed to a recent change in Red Hat Linux.
A new feature implemented in RHEL V7.2 (systemd-219-19.el7.x86_64) can cause O.S. IPC (Inter-process communication) semaphores to be deallocated when a non-system RHEL user logs out (system users, i.e. with a UID number < 1000, are excluded)
How To Display Custom SDA Extensions in the Clinical Viewer
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Written by Sebastian Musielak, InterSystems Support, November, 2016
End users sure love Excel tables. So, how can you deliver the second to the first? Read this post to find out.
This article, and following two articles of the series, is intended as a user guide for developers or system administrators, who need to work with OAuth 2.0 framework (further referred to as OAUTH for simplicity) in their InterSystems product based applications.
Have some free text fields in your application that you wish you could search efficiently? Tried using some methods before but found out that they just cannot match the performance needs of your customers? Do I have one weird trick that will solve all your problems? Don’t you already know!? All I do is bring great solutions to your performance pitfalls!
As usual, if you want the TL;DR (too long; didn’t read) version, skip to the end. Just know you are hurting my feelings.
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
This article is translation of one from Habrahabr InterSystems blog (Russian).
The original post can be found here: https://habrahabr.ru/company/intersystems/blog/251611/
InterSystems is delighted to announce the support of Docker container technology as a platform from the moment 2016.1 will be released.
InterSystems Caché globals provide very convenient features for developers. But why are globals so fast and efficient?
Basically, the Caché database is a catalog having the same name as the database and containing the CACHE.DAT file. On Unix systems, the database can also be an ordinary disk partition.
Starting with 2017.1, InterSystems is adding Ubuntu (64-bit) as a third linux server platform. Prior to 2017.1 Ubuntu was already available as a development platform and customers could use InterSystems distributions build for SUSE to run on Ubuntu. As a result there are a few license key implications for 64-bit linux versions starting with Caché and Ensemble 2017.1:
a) Customers using RedHat will observe no changes
b) Customers using InterSystems products(1) for SUSE on SUSE will need new license keys (no charge)
