EDBI - A database independent interface for Erlang

EDBI is intended as a database independence and connection pooling library for erlang programs.

Drivers

dummy

edbi_dummy A dummy driver for EDBI testing that just writes SASL logs on startup

pgsql

pgsql The Process One Postgresql driver modified for use with EDBI.

mysql

mysql The Process One MySQL driver modifed for use with EDBI. [1]

[1]	Note that this driver isn't tested yet.

Installation

Build the source using rebar:

./rebar compile

Or use it as dependency in the rebar.config of your erlang application:

{deps, [

{edbi, "0.1.2",

{git, "git://github.com/bharendt/edbi.git", {tag, "v0.1.3"}}}

]}.

Configuration

EDBI uses OTP application configuration, so you can just put:

{edbi, [{pools, pools()}]}.

in your system.config file.

The syntax of the pools env value is described in edoc type format as follows:

pools() = [pool(),...].
pool()  = {PoolName::term(),
           Driver::atom(),
           Options::term(),
           Count::integer()}.

PoolName

the term used to identify and refer to the pool.

Driver

the name of the backend to use in the pool.

Options

a proplist of options to pass to the backend.

Count

the number of connections to maintain to the database.

Examples

A pool called dummy_pool of 10 dummy drivers.:

{dummy_pool, dummy, [], 10}

A pool (mydb) of 10 connections to the local postgres database mydb as myuser.:

{mydb, pgsql, [{database, "mydb"},
               {host, "localhost"},
               {user, "myuser"},
               {password, ""}],
       10}

Use

Currently the API is extremely basic and only allows you to retreive connection PIDs to use with the driver backend.:

1> ConnectionPid = edbi:connection(PoolName),
1> pgsql:squery(ConnectionPid, "select 1").
{ok,[{"SELECT",[{"?column?",text,0,23,4,-1,0}],[["1"]]}]}