Que Es El Idem
Abele Beardsley
Idem is an idempotent dataflow programming language. It exposes statefulprogramming constructs that makes things like enforcing the stateof an application, configuration, SaaS system, or others verysimple.
Since Idem is a programming language, it can also be used for dataprocessing and pipelining. Idem can be used not only to managethe configuration of interfaces, but also for complex rule enginesand processing files or workflows.
Idem is a language to glue together management of all sorts ofinterfaces. You can think of it like having idempotentscripts. Automation that can be run over and over again thatenforces a specific state or process.
At first glance this might seem useless, but think more deeply. Have youever needed to make sure that something was set up in a consistent way? Itcan be very nice to be able to enforce that setup without worrying aboutbreaking it. Or think about data pipelines, have you ever had input datathat needed to be processed? Idempotent systems allow for data to beeasily processed in a consistent way, over and over again!
Idem works by taking language files called sls files and compiling themdown to data instructions. These data instructions are then run through theIdem runtime. These instructions inform Idem what routines to call toenforce state or process data. It allows you to take a high level datasetas your input, making the use of the system very easy.
Idem is built using two critical technologies: Python and POP. Since Idemis built on Python, it should be easy to extend for most software developers.Extending Idem can be very easy because simple Python modules are all you needto add capabilities!
The other technology, POP, may be new to you. This is the truly secret saucebehind Idem as well as a number of emerging exciting technologies. POP standsfor Plugin Oriented Programming. It is the brainchild of the creator ofSalt and a new way to write software. The POPsystem makes the creation of higher level paradigms like Idem possible, but alsoprovides the needed components to make Idem extensible and flexible.
Idem is an open source python based project developed by VMware working as aninfrastructure as data.
It is an idempotent dataflow programming language. Exposes in a simple way stateful programming constructs enforcing the state of an application, configuration, SaaS systems, etc.
The concept of Idempotent is simple. Every time an action is executed, will always produce same result regardless of the state of a system before execution. Additional details can be found in Idem`s getting started documentation..
Where can Idem be implemented in our environment?
It is one stop shop for managing the multi cloud environments and works in a plugin based approach. It supports many plugins as idem-vra, idem-aws, idem-gcp and idem-azure, etc. Allows us to implement our own plugin, based on specific use-case or flavour of cloud. To get started with plugin development it is beneficial to review Create an Idem Provider Plugin page.
Prerequisites :
Installation requires python 3.8 or higher version installed in our system.
For Windows or Mac, can check the current version of python using command below.
In this scenario I am using MAC and PyCharm as IDE.
VMware Aria Automation is an platform allowing you build and manage modern applications. It provides a consistent self-service experience for users, regardless of the underlying cloud provider. Aria Automation also provides governance and resource lifecycle management capabilities, helping organisations to control costs and ensure compliance with policies.
Action Based Extensibility (ABX) Actions are small, lightweight stateless containers allowing us to create scripts in different language such as Python, NodeJS, Powershell. We can create extensibility actions by either writing a user-defined action script code or importing a predefined script code as a .ZIP package. More details about ABX is here
Plugin installation requires cloning the Idem-vra gitlab repository.
Describe is one of the three currently existing idem states (present, absent and describe) and we will be looking at State => abx => actions section in Actions idem documentation which will represent path in our command.
It is time to dig more to understand how managing SLS files allow us to manage ABX actions.
An example use-case is the creation of a new ABX action with different name using previously exported sls file.
In a previous step idem describe generated the sls file with present state.
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In randomized controlled trials of seriously ill patients, death is common and often defined as the primary endpoint. Increasingly, non-mortality outcomes such as functional outcomes are co-primary or secondary endpoints. Functional outcomes are not defined for patients who die, referred to as "truncation due to death", and among survivors, functional outcomes are often unobserved due to missed clinic visits or loss to follow-up. It is well known that if the functional outcomes "truncated due to death" or missing are handled inappropriately, treatment effect estimation can be biased. In this paper, we describe the package idem that implements a procedure for comparing treatments that is based on a composite endpoint of mortality and the functional outcome among survivors. Among survivors, the procedure incorporates a missing data imputation procedure with a sensitivity analysis strategy. A web-based graphical user interface is provided in the idem package to facilitate users conducting the proposed analysis in an interactive and user-friendly manner. We demonstrate idem using data from a recent trial of sedation interruption among mechanically ventilated patients.
Copyright Statement
This is a pre-copyedited, author-produced version of an article accepted for publication in Scots Law Times following peer review. The definitive published version TAYLOR, L.J. and HENDERSON, S.E. 2002. Confessions: consensus in idem? Scots law times [online], 2002(40), pages 325-327, is available online on Westlaw UK [ ].