CouchDB .NET View Server
Copyright (C) 2010 Anton Markov
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
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This is a view server for the CouchDB document-oriented database. It follows
the specifications set out at:
For more information about CouchDB see:
This project consists of two assemblies: ViewServer and ViewHelpers.
- ViewServer is a console driver application which can be executed
by CouchDB to execute map/reduce operations. The driver accepts
one command line argument: the .NET language to accept as input.
This should be one of the values supported by the
System.CodeDom.Compiler system. By default these are "CSharp", "JScript",
and "VB". You can add support for a particular language to CouchDB by
adding a line to the [query_servers] section of the local.ini file:
- ViewHelpers contains some helper classes for building views in .NET
languages. The helpers include:
* A singleton class attribute TheCouchDBView which is applied to the class
containing the map or reduce function.
* Interface declarations IMapFunctor, IReduceFunctor and IReReduceFunctor
which must be implemented to support the respective functionality.
* The singleton class Emitter which implements the Emit function which
is used for map operations.
See SampleViewFunctions.txt for some quick examples.
The code is dynamically compiled and linked into in-memory assemblies. These
assemblies are cached until a 'reset' command is received from CouchDB.
As a result, compiling is always a one-time cost.
As a fun side note, using C# as the target language works perfectly well
under Mono on Linux. Your milage with other languages may vary.
This software includes binary assemblies from the JSON.NET project
Copyright (c) 2007 James Newton-King
See JSON.NET/Readme for license details and where to obtain sources.