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BSD-3-Clause licensed by KC Sivaramakrishnan <http://kcsrk.info>
Maintained by Gowtham Kaki <http://gowthamk.github.io>
Quelea is a Haskell library that helps programmers develop highly
scalable applications on the top of eventually consistent NoSQL stores,
such as Cassandra. You can think of Quelea as a mediator between the
application programmer and the underlying NoSQL store. It understands both
the application requirements and the store semantics, and helps
programmers use NoSQL stores in such a way so as to maximize performance
and ensure correct application behaviour, both at the same time! Among
other things, Quelea library implements:
A Domain-Specific Language (DSL) that lets NoSQL application programmers
declare the consistency requirements of their applications as contracts
(also called specifications)
A static contract classification procedure that maps high-level
application contracts to appropriate low-level consistency guarantees
provided by the underlying NoSQL store, and
A run-time that runs application operations after tuning the
store consistency to appropriate levels as determined by the
contract classification procedure. While the
implementations of DSL and the static contract
classification components are largely independent of the
actual NoSQL store used, the current implementation of
run-time component is tailor-made to work with the Cassandra
data store.
