ErlSDB README ------------- This code is an overhaul of Shahzad Bhatti's original code (apparently not maintained anymore). Summary ----------- Amazon SimpleDB is a web service for running queries on structured data in real time. See aws.amazon.com/simpledb. This erlsdb library provides interface to access SimpleDB web service using REST APIs. Author: Shahzad Bhatti <bhatti@plexobject.com> Author: Eric Cestari <eric@ohmforce.com> Version: 1.0 Date: 2009/02/23 Requirements ------------ - OTP-R12B (http://erlang.org/download.html) - An Amazon Web Services account - See http://www.amazonaws.com Features --------- - Uses Signature V2 - Multiple servers are ran (default : 5) - HTTP calls are asynchronous, per server. - SSL support enabled by default (for deactivating see example usage below) - Full support of the SimpleDB API version 2007-11-07 TODO ----- - Update documentation - Implement a type system as described by James Murty in his book License ------- Released under the GNU General Public License v2. = BUILDING = ./rebar compile sudo ./rebar install = Configuration = You'll need to set your credentials to Amazon SDB : - by passing them as OTP application parameters or - by setting the AMAZON_ACCESS_KEY_ID and AMAZON_SECRET_ACCESS_KEY environment variable = Running the incomplete test suite = Set the AMAZON_ACCESS_KEY_ID and AMAZON_SECRET_ACCESS_KEY environment variables erl -boot start_sasl -pa lib/erlsdb/ebin -pa lib/erlsdb/test/ -s erlsdb_test test -s init stop Expected output (if you did not create any domains previously): Listing domains {ok,[],nil} Creating test domain ["TestDomain"] Adding attributes [{"City","Seattle"}, {"State","WA"}, {"StreetAddress","705 5th Ave"}, {"Zip","98101"}] Removing attributes ok Removing test domain [] = A FEW EXAMPLES = # SSL is deactivated in the following : erl -boot release_local/erlsdb-initial -erlsdb access '"<AWS_ACCESS_ID>"' secret '"<AWS_SECRET_KEY>"' ssl false 1> erlsdb:create_domain("fubar"). nil 2> erlsdb:list_domains(). {ok,["fubar"],[]} 3> erlsdb:put_attributes("fubar", "test", [{"foo", "bar"}]). nil 4> erlsdb:get_attributes("fubar", "test"). {ok,[{"foo","bar"}]} .. 5> erlsdb:select("select count(*) from domain where toto = 'truc'",nil). {ok,[{"Domain",[{"Count","2"}]}],nil} 6> erlsdb:domain_metadata("domain"). {ok,[{"Timestamp",1235403601}, {"ItemCount",4}, {"AttributeValueCount",8}, {"AttributeNameCount",4}, {"ItemNamesSizeBytes",24}, {"AttributeValuesSizeBytes",20}, {"AttributeNamesSizeBytes",19}]} 6> erlsdb:list_domains(nil,1). % paging works {ok,["domain"],"ZnViYXI="} 7> erlsdb:list_domains("ZnViYXI=",1). {ok,["fubar"],nil} 8> erlsdb:select("select count(*) from domain where toto = 'truc'",nil). {ok,[{"Domain",[{"Count","2"}]}],nil} 9> erlsdb:select("select * from blobs where toto = 'truc'",nil). {ok,[{"blob1",[{"toto","truc"},{"foo","bar"}]}, {"blob2",[{"toto","truc"},{"foo","bar"}]}], nil}