mongopool

mongopool: mongodb + poolboy

A MongoDB connection pool server application.

Configuration

[
  {mongopool, [
    {retry, 20},
    {pools, [
      {mypool, [
        {size, 10},
        {max_overflow, 30}
      ], [
        {database, <<"mydb">>},
        {hostname, mongohostname},
        {username, "dbuser"},
        {password, "dbpassword"},
        {w_mode, safe}
      ]}
    ]}
  ]},
]

Note: if you doesn't enable the authorization on mongodb, you don't need to specify username and password.

The option retry specify how many times the workers should try to connect if it's startup step fail. It's very useful when the erlang server is faster than mongodb server (especially the case when mongodb start the first time).

Note: you can specify all the pool that you need.

Usage

To start the pool:

application:ensure_all_started(mongopool).

The API available is simply a proxy to mongodb-erlang API. Instead of pass the Connection, you pass the pool name.

E.g. to find inside a collection:

MyDocument = mongopool_app:find_one(
    mypool, Collection, #{<<"_id">> => <<"mydocument_id">>}).

Build

$ utils/rebar3 compile

Deprecated

MongoDB-Erlang >= 0.8.2 change API and inglobe the use of poolboy. So, after this version, mongopool became incompatible and useless.

For that reason, if you want use a recent release of the driver, please use directly MongoDB-Erlang.

Thanks for use MongoPool.