TestData

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The same system that was designed to handle 100 users will sometimes not work for 1,000 or 10,000 users.

dbMonster is a good program for adding data to your system so you can simulate how it will function in production.

First you want to download dbmonster (dbmonster-core and dbmonster-ant)

I found it easiest to run dbMonster with ant on my system. I'm using Windows XP and cygwin. dbmonster-core was extracted to f:\tools\dbmonster-core-1.0.3 and dbmonster-ant-1.0.1.jar was saved to f:\tools\monster\

Create 2 new directories inside of dbmonster-core-1.0.3 called config and schema.

mkdir config mkdir schema

Create a file called dbmonster.properties inside of the config directory you just made.

dbmonster.jdbc.driver=org.postgresql.Driver
dbmonster.jdbc.url=jdbc:postgresql://127.0.0.1/YourDatabase
dbmonster.jdbc.username=postgres
dbmonster.jdbc.password=YourPassword

dbmonster.max-tries=1000

dbmonster.rows=1000

dbmonster.progress.monitor=pl.kernelpanic.dbmonster.ProgressMonitorAdapter

Next you want to map the schema of the tables that you want to generate data for. To do this, you will make a new file called appfuse-schema.xml. This example will allow you to generate 1500 new users at a time.

<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE dbmonster-schema PUBLIC
    "-//kernelpanic.pl//DBMonster Database Schema DTD 1.1//EN"
    "http://dbmonster.kernelpanic.pl/dtd/dbmonster-schema-1.1.dtd">

<dbmonster-schema>
        <name>User Schema</name>
                <table name="app_user" rows="1500">
                        <!--
                        <key databaseDefault="false">
                                <generator type="pl.kernelpanic.dbmonster.generator.MaxKeyGenerator"
                                        <property name="columnName" value="id"/>
                                </generator>
                        </key>
                        -->
                        <column name="username">
                                <generator type="pl.kernelpanic.dbmonster.generator.StringGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minLength" value="4"/>
                                        <property name="maxLength" value="15"/>
                                        <property name="allowSpaces" value="false"/>
                                </generator>
                        </column>
                        <column name="version">
                                <generator type="pl.kernelpanic.dbmonster.generator.NumberGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minValue" value="1"/>
                                        <property name="maxValue" value="5"/>
                                        <property name="returnedType" value="integer"/>
                                </generator>
                        </column>
                        <column name="password">
                                <generator type="pl.kernelpanic.dbmonster.generator.StringGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minLength" value="4"/>
                                        <property name="maxLength" value="15"/>
                                        <property name="allowSpaces" value="false"/>
                                </generator>
                        </column>
                        <column name="first_name">
                                <generator type="pl.kernelpanic.dbmonster.generator.StringGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minLength" value="4"/>
                                        <property name="maxLength" value="15"/>
                                        <property name="allowSpaces" value="false"/>
                                </generator>
                        </column>
                        <column name="last_name">
                                <generator type="pl.kernelpanic.dbmonster.generator.StringGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minLength" value="4"/>
                                        <property name="maxLength" value="15"/>
                                        <property name="allowSpaces" value="false"/>
                                </generator>
                        </column>
                        <column name="city">
                                <generator type="pl.kernelpanic.dbmonster.generator.StringGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minLength" value="4"/>
                                        <property name="maxLength" value="15"/>
                                        <property name="allowSpaces" value="false"/>
                                </generator>
                        </column>
                        <column name="postal_code">
                                <generator type="pl.kernelpanic.dbmonster.generator.NumberGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minValue" value="10000"/>
                                        <property name="maxValue" value="77007"/>
                                        <property name="returnedType" value="integer"/>
                                </generator>
                        </column>
                        <column name="email">
                                <generator type="pl.kernelpanic.dbmonster.generator.StringGenerator">
                                        <property name="nulls" value="0"/>
                                        <property name="minLength" value="4"/>
                                        <property name="maxLength" value="15"/>
                                        <property name="allowSpaces" value="false"/>
                                </generator>
                        </column>


                </table>
</dbmonster-schema>

<project name="dbmonster task example" default="gendb" basedir=".">

  <property file="build.properties"/>

  <!-- setup classpath -->
  <path id="dbmonster.classpath">
    <fileset dir="${dbmonster.ant}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${dbmonster.home}">
      <include name="**/*.jar"/>
    </fileset>
  </path>

  <taskdef
    name="dbmonster"
    classname="pl.kernelpanic.dbmonster.ant.DBMonsterTask"
    classpathref="dbmonster.classpath">
  </taskdef>

  <target name="gendb">
    <dbmonster
      config="${dbmonster.config}/dbmonster.properties" verbose="true">
      <fileset dir="${dbmonster.schemas}">
        <include name="*.xml"/>
      </fileset>
    </dbmonster>
  </target>
</project>

dbmonster.home=/tools/dbmonster-core-1.0.3
dbmonster.ant=/tools/monster
dbmonster.config=/tools/dbmonster-core-1.0.3/config
dbmonster.schemas=/tools/dbmonster-core-1.0.3/schema