My weekend project: MongoDB implementation in Ruby

#1

Post by thegdb » Mon, Jul 11, 2011, 6:33 PM UTC

My weekend project: MongoDB implementation in Ruby
github.com

Re: My weekend project: MongoDB implementation in Ruby

#2

Post by thegdb » Mon, Jul 11, 2011, 7:10 PM UTC

One really nice part about the implementation was I could just reuse the Ruby Mongo driver's test suite.

Re: My weekend project: MongoDB implementation in Ruby

#3

Post by websymphony » Mon, Jul 11, 2011, 7:15 PM UTC

Interesting. So now I can test my mongodb app, without needing to install mongodb server on my machine? Cool!

Re: My weekend project: MongoDB implementation in Ruby

#4

Post by mdda » Mon, Jul 11, 2011, 7:19 PM UTC

Looks great! But the stinger is in the tail : "I think the next thing to add is indexes. Currently everything works via a linear scan of the database."

Re: My weekend project: MongoDB implementation in Ruby

#5

Post by thegdb » Mon, Jul 11, 2011, 7:21 PM UTC

mdda wrote: post #4

Looks great! But the stinger is in the tail : "I think the next thing to add is indexes. Currently everything works via a linear scan of the database."

Thanks. Re: indexes - patches welcome :). I don't expect them to be hard to build though. Since embedded-mongo is in memory, they're just a bunch of hash tables.

Re: My weekend project: MongoDB implementation in Ruby

#6

Post by benatkin » Mon, Jul 11, 2011, 7:43 PM UTC

mdda wrote: post #4

Looks great! But the stinger is in the tail : "I think the next thing to add is indexes. Currently everything works via a linear scan of the database."

It depends on what you use it for. Without indexes, it could be used for testing without setting up a local MongoDB server, as long as there aren't too many records.

Re: My weekend project: MongoDB implementation in Ruby

#7

Post by e1ven » Mon, Jul 11, 2011, 7:51 PM UTC

This seems really fun. I'd love to be able to use this almost like a version of SQLlite, but a JSON interface. I could see this in Android/iPhone, as well as Desktop apps.

Re: My weekend project: MongoDB implementation in Ruby

#8

Post by kcbanner » Mon, Jul 11, 2011, 7:58 PM UTC

e1ven wrote: post #7

This seems really fun. I'd love to be able to use this almost like a version of SQLlite, but a JSON interface. I could see this in Android/iPhone, as well as Desktop apps.

Embedded MongoDB on Android would be awesome.

Re: My weekend project: MongoDB implementation in Ruby

#9

Post by mdda » Mon, Jul 11, 2011, 8:16 PM UTC

thegdb wrote: post #5

mdda wrote: post #4

Looks great! But the stinger is in the tail : "I think the next thing to add is indexes. Currently everything works via a linear scan of the database."

Thanks. Re: indexes - patches welcome :). I don't expect them to be hard to build though. Since embedded-mongo is in memory, they're just a bunch of hash tables.

In that case, I would think that the indexing stuff (i.e. hash lookups) would be way better than linear already. Cool.

Re: My weekend project: MongoDB implementation in Ruby

#10

Post by mathias_10gen » Mon, Jul 11, 2011, 11:45 PM UTC

While this is a very nifty bit of code, I'd be very careful about using it for unit testing as there is a high likelihood of minor behavior differences verses a real mongod which can cause surprises in production.

Also, for anyone looking to embed MongoDB and who doesn't mind using C++ it is possible and rather easy. In fact some of our unit tests and all of our tools other than the shell already do this. See https://github.com/mongodb/mongo/blob/master/tools/tool.cpp#... for the details. The DBDirectClient class implements the full C++ driver interface but does all operations in-process. The downside is that unlike when using our drivers (which have no licensing impact on your code) when you embed mongodb within your application it becomes bound by AGPL.

PS- That is really impressive for a weekend project! You should get in touch with us at 10gen if you're looking for a new job.