A Haskell library that adds ACID (Atomicity, Consistency, Isolation and Durability) guarantees to any serializable Haskell data structure.
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Questions tagged [acid-state]
24 questions
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Unable to cabal-install acid-state on Haskell Platform 2012.2.0.0 (Windows XP)
Using cabal, I tried to install acid-state on Haskell Platform 2012.2.0.0 (Windows XP) but got the following error:
src-win32\FileIO.hs:43:5:
Not in scope: catchIO Perhaps you meant `catch' (imported from Prelude)
src-win32\FileIO.hs:55:6:
…
user1023733
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Snap, IO and acid-state
Trying to use acid-state in Snap, and I hit a roadblock.
Here is what I got so far.
First my acid-state related objects (it's a dummy book with a isbn number):
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE GeneralizedNewtypeDeriving…
Andriy Drozdyuk
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Retrieving pure values from acid state queries
This seems like something that should be easy but how do I get a pure value out of a query if I am using AcidState's Data.Acid.Memory.Pure module. I guess I can generalize the question to "how do I get any value out of the Update monad?". You see,…
Eric
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How can I use Transaction rollback with Multiple forms in Django
I have four forms and I need them to be saved one by one however when any one form yields validation error then I need the data saved in the database to be removed. I understand the transaction rollback with Django query but not able to figure out…
mayank
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How to execute Play 2 only if Play 1 succeeds in Ansible
I have two Plays having one task each.
The first Play checks if the /var/test.dat exists on each target. Only if the first play is successful do I want the second play to run which executes these scripts in parallel.
If the first play fails i.e the…
Ashar
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using type classes to provide alternative implementations for when using Acid-State
I wrote a web application using scotty and acid state, now i would like to use type classes to be able to provide alternative implementations for the capabilities of my application for testing.
I get the general idea of it and am able to apply it so…
Harold Fincher
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JavaScript Multi-statement Transaction in Marklogic
I wanted to write a multi-statement transaction in server-side JavaScript in marklogic. What I wanted to achieve is, do an update transaction and then write a query statement which queries for the updated document and confirm that the update is…
sharu
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Trying to bring HSP and Acid-state together in a form with Happstack
I followed the Happstack Crash Course and now I am trying to bring different things together:
From "Type-Safe Form processing using reform" (http://happstack.com/docs/crashcourse/Reform.html#reform) I have coded this register form:
register ::…
Flo
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acid-state example error
I'm trying to start using acid-state for a project, but I'm running into trouble running the demos.
Running HelloWorld.hs from this example collection on my 64-bit box gives me the errors
acid-state.hs:26:7:
No instance for (MonadState
…
Inaimathi
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