mongo4ben

mongo4ben is a plugin to access mongoDB with Benerator. It supports data import from and export of generated data to a mongoDB instance and modification of existing database data.

Installation

Download and unzip the newest distribution from https://sourceforge.net/projects/mongo4ben/files/.

Copy the jar files from the distribution's lib folder into your Benerator installation's lib folder.

If you want to distribute a mongoDB data generation project to run on a fresh Benerator installation, put the jars mentioned above into a 'lib' folder inside your project folder. 

Usage

If you are not familiar with benerator, learn more about it at http://databene.org/benerator.html.

At the beginning, import mongo4ben features in your Benerator project:

    <import platforms='mongodb' />

Then, a mongodb instance can be declared using a <mongodb> element, using an environment definition file:

    <mongodb id='db' environment='mymongo' />
 

The environment definition file has to be in the project folder or at ${user.home}/databene/ and has to carry the name specified in the <mongodb> declaration before, in this case mymongo.env.properties with content like this:

    db_url=127.0.0.1:27017
    db_catalog=testDatabase
    db_user=me
    db_password=secret

The db_catalog setting has to be set to mongoDB's database name.

That's it! Now you can use mongodb for data import and export.

A simple data generation example to help you get started. It generates 100 users with 1 to 3 addresses: 

<setup>
    <import platforms='mongodb' />
    <mongodb id='db' environment='mymongo' />
    <generate type='mit_user' minCount='100' consumer='db'>
        <attribute name='name' type='string' />
        <attribute name='age' type='int' min='18' max='78' />
        <part name='addresses' container='list' count='2'>
            <attribute name='street' pattern='[A-Z][a-z]{4} Street'/>
            <attribute name='houseNo' type='int' min='2' max='9' />
        </part>
    </generate>
</setup>

An example that exports (prints) all user data to the text console:

<setup>
    <import platforms='mongodb' />
    <mongodb id='db' environment='mymongo' />
    <iterate type='mit_user' source='db' consumer='ConsoleExporter'/>
</setup>
 

An trivial anonymization-style example that sets each user's age to 33 and house number to 123:

<setup>
    <import platforms='mongodb' />
    <mongodb id='db' environment='mymongo' />
    <iterate type='mit_user' source='db' consumer='db.updater(),ConsoleExporter'>
        <attribute name='age' constant='33' />
        <part name='addresses' source='mit_user' container='list'>
            <attribute name='houseNo' constant='123' />
        </part>
    </iterate>
</setup>

 

Restrictions

mongo4ben does not yet support selective queries - all data import refers to the collection by the specified 'type' name and iterates through all elements.

Requirements

- Java 1.6+
- Benerator 0.7.6+