Looks interesting. Thanks for sharing. cheers -ben On Wed, Dec 28, 2016 at 11:42 AM, Masashi UMEZAWA <masashi.umezawa@gmail.com> wrote:
Hi all,
I've developed a new database connectivity library for Pharo, called Tarantalk. https://github.com/mumez/Tarantalk
Tarantalk is a connector for Tarantool. https://tarantool.org/
Tarantool is a Lua engine with tuple persistence. It is like a GemStone in Lua.
Firstly, Tarantalk can be used as a tuple-centric DBMS. You can store arbitrary Smalltalk objects as tuples, and retrieve them by multiple indexes.
tarantalk := TrTarantalk connect: 'taran:talk@localhost:3301'. space := tarantalk ensureSpaceNamed: 'bookmarks'. primaryIndex := space ensurePrimaryIndexSetting: [ :options | options tree; partsTypes: #(#string)]. space insert: #('Tarantool' 'https://tarantool.org' 'Tarantool main site'). space insert: #('Pharo' 'http://pharo.org' 'Pharo main site'). primaryIndex selectHaving: #('Pharo'). " => #(#('Pharo' 'http://pharo.org' 'Pharo main site'))"
What is more interesting is that Tarantalk can call remote Lua functions and can evaluate Lua expressions. So you can extend your database system freely with Lua and Smalltalk!
-- Lua function bookmarkUrls() local urls = {} for k,v in box.space.bookmarks:pairs() do table.insert(urls, v[2]) end return urls end box.schema.func.create('bookmarkUrls')
"Smalltalk" tarantalk call: 'bookmarkUrls'. " => #(#('http://pharo.org' 'https://tarantool.org'))"
(tarantalk evalWithReturn: '(require("digest").sha512_hex(...))' arguments: {'Hello, Smalltalk'}) value. " => #('ec599e128831b282f6f7a833834c90a3eb2e61453e5757ca3c2bc8a26e94d7c2f76bd6a7ce33df2427f3821e44a12d26781d39eac6782b59a649950ea59f9e13')"
Moreover, Tarantalk is pretty fast compared to some other NoSQL databases. https://github.com/mumez/Tarantalk#performance
A simple micro benchmark shows that Tarantalk is about 5x faster than RediStick Redis client.
Enjoy! -- [:masashi | ^umezawa]