A Clojure library for working with Amazon SimpleDB
, (docs)
Built on top of Amazon’s Java API for SimpleDB
, (javadocs)
The library lets you directly save and load Clojure data, and query using data. No strings! Stores using lexicographically-sortable representations. Can store strings, keywords, ints, longs, Dates, booleans and UUIDs, and can be extended to other primitives.
The dependencies can be downloaded from the downloads area
(use 'org.clojure.sdb)
(def aws-key "[...]")
(def aws-secret-key "[...]")
(def client (create-client aws-key aws-secret-key))
(put-attrs client "heroes" {:sdb/id "spiderman"
:power "spidery-things"
:secret-identity "Peter Parker"})
(put-attrs client "heroes" {:sdb/id "hulk"
:power "huge angry thing"
:secret-identity "Bruce Banner"})
(put-attrs client "heroes" {:sdb/id "venom"
:power "spidery-things"
:secret-identity "Eddie Brock"
:evil true})
(get-attrs client "heroes" "spiderman")
;; {:secret-identity "Peter Parker", :power "spidery-things", :sdb/id "spiderman"}
(query client '{:select [:secret-identity] :from "heroes" :where (= :evil true)})
;; ({:secret-identity "Eddie Brock", :sdb/id "venom"})
It’s not always desirable to connect to a live server when using SimpleDB since you get charged (a small amount) for every transaction, and you won’t be able to develop while offline. To develop against a local SimpleDB mock, download and install SimpleDB-dev and configure your client to use an alternate service URL:
$ wget http://simpledb-dev.googlecode.com/files/simpledb-dev-0.1.10.zip
$ unzip simpledb-dev-0.1.10.zip
$ python SimpleDB-Dev/src/simpledb_dev.py &
In your code:
(create-client my-sdb-key my-sdb-secret-key
(.withServiceURL (com.amazonaws.sdb.AmazonSimpleDBConfig.)
"http://localhost:8080")))