idempotent Questions
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The Closeable interface was introduced in Java 5 whereas the AutoCloseable interface came in Java 7 together with the try-with-resources statement. Closeable extends (since Java 7) the Autocloseabl...
Kruter asked 6/9, 2015 at 16:51
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After reading tons of information on the web about Azure WebJobs, documentation says a job should be idempotent, on the other hand, blogs say they use WebJobs to do actions such as "charging a cust...
Fivepenny asked 19/6, 2015 at 15:50
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Context
I have a REST API where multiple clients (applications) can update the state of a resource with PUT. For the example, this resource is a lamp that you can turn ON or OFF.
This resource is...
Macymad asked 10/6, 2015 at 15:22
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I don't quite get how the HTTP verbs are defined as idempotent. All I've read is GET and PUT is idempotent. POST is not idempotent. But you could create a REST API using POST that doesn't change an...
Beadle asked 1/1, 2015 at 3:54
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I am using Ansible and I want to run a task only once. I follow the documentation about how to configure and run a task only once
- name: apt update
shell: apt-get update
run_once: true
But wh...
Slap asked 16/10, 2014 at 16:13
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Do repeated requests to idempotent methods have to return the same response code?
A lot of other people are asking the same question and ending up with contradicting answers. The answer should ref...
Nihi asked 12/7, 2014 at 14:33
4
A post from another thread says that a function is said to be idempotent if it can be called multiple times without changing the result.
However the terms used (like no-side-effects and return-sam...
Tetragon asked 2/2, 2012 at 11:32
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The main running example of the Angular Dart tutorial is a Recipe Book app. The exercise at the end of the Chapter 5 on filters and services suggests trying to "create a [custom] filter that will m...
Abeabeam asked 24/1, 2014 at 1:53
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I have spent a lot of time recently reading the HTTP 1.1 specification and relating it to REST. I have found that there are two interpretations of the HTTP DELETE method in regards to its "idempote...
Lotetgaronne asked 12/4, 2009 at 2:26
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I have a post deployment script in my SQL database project, which registers default values that should be part of the database. I'd want this script to be able to be run multiple times without chan...
Voltaic asked 12/8, 2012 at 1:42
2
I have been doing some reading on the GET HTTP method and in particular on its idempotent quality.
This is my understanding: if I call a GET operation 1 time or a million times (or any number of ...
Carltoncarly asked 5/10, 2012 at 19:2
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Is there a way that I can call $(selector).bind('click', handler) or $(selector).on('click', handler) multiple times such that the handler only gets attached once?
Right now, I have multiple AJAX...
Drysalter asked 7/9, 2012 at 17:17
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Let's say I want to build a REST service for making notes that looks something like this:
GET /notes/ // gives me all notes
GET /notes/{id} // gives the note identified by {id}
DELETE /notes/{id} ...
Lamont asked 4/4, 2012 at 18:42
2
That is, for any String string, does the following hold?
string.pluralize == string.pluralize.pluralize
Casablanca asked 29/2, 2012 at 19:21
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The Microsoft.NET framework provides the IDisposable interface which requires an implementation of void Dispose() method. Its purpose is to enable manual, or scope-based releasing of expensive reso...
Fetal asked 19/1, 2012 at 9:42
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So "idempotence" can be defined as:
An action, that if performed N times has the same effect as performing the action only once.
Got it, easy enough.
My question is about the subtlety of this de...
Airdrome asked 14/12, 2011 at 14:12
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I was researching Scala DB frameworks/wrappers, and came across Gizzard, from Twitter. While I was impressed at first, I cooled down when I read the restriction. They say that all DB operations you...
Pifer asked 15/8, 2011 at 8:13
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I tried searching this over the net but in vain. Is there a way to use hibernate to perform an idempotent update.
One use case is to use HTTP PUT to update a specific field in the database via a ...
Langton asked 26/8, 2011 at 21:55
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So we have an unsubscribe link - this is by it's nature an HTTP GET.
The appropriate RFC says this should be idempotent but to my mind the user expectation will be that they are clicking a l...
Neckwear asked 10/8, 2011 at 9:52
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This question piggy backs of another question which I raised regarding abusing the IEnumerable interface by modifying an object as you iterate over it.
The general consensus is that no anything th...
Elf asked 16/11, 2010 at 13:58
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I'm putting together a small web app that writes to a database (Perl CGI & MySQL). The CGI script takes some info from a form and writes it to a database. I notice, however, that if I hit 'Relo...
Stellastellar asked 20/11, 2008 at 15:36
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I'm designing a RESTful web service utilizing ROA(Resource oriented architecture).
I'm trying to work out an efficient way to guarantee idempotence for PUT requests that create new resources in ca...
Polik asked 2/6, 2010 at 3:21
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I'm reading an article about the recently released Gizzard sharding framework by twitter (http://engineering.twitter.com/2010/04/introducing-gizzard-framework-for.html). It mentions that all write ...
Emyle asked 8/4, 2010 at 6:4
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Applications send out emails to verify user accounts or reset a password. I believe the following is the way it should be and I am asking for references and implementations.
If an application has t...
Trahern asked 30/6, 2009 at 23:28
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