Raible's Wiki: AppFuseOnDB2

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;:''This howto assumed you've already installed DB2 and your DBA username/password combination is admin/admin.''

;:''This howto assumed you've already installed DB2 and your DBA username/password combination is db2admin/db2admin.''

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__January 16, 2004 UPDATE:__ I greatly simplified this process in AppFuse and altered this HowTo accordingly. This reflects the latest code in CVS and updates that will be in 1.3.

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Edit properties.xml and change the database.jar to be db2.jar:

{{{

}}}

Edit your build.properties file to reflect your new database of choice. MySQL settings are the defaults specified in properties.xml. Here is a sample for DB2, followed by one for PostgreSQL:

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Edit database.properties, where you'll change a number of settings:

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database.jar=${db2.jar}

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database.name=jdbc:db2:appfuse

#database.name=appfuse

database.host=localhost

#database URL for creating other databases (not used with db2)

database.admin.url=jdbc:${database.type}://${database.host}/db2

database.admin.username=db2admin

database.admin.password=db2admin

hibernate.dialect=net.sf.hibernate.dialect.DB2Dialect

database.driver_class=COM.ibm.db2.jdbc.net.DB2Driver

database.url=jdbc:${database.type}://${database.host}/${database.name}

database.username=db2admin

database.password=db2admin

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;:''Uncomment the db2 settings and comment out the mysql settings''

__PostgreSQL:___

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## DB2

hibernate.dialect net.sf.hibernate.dialect.DB2Dialect

hibernate.connection.driver_class = COM.ibm.db2.jdbc.app.DB2Driver

hibernate.connection.url = jdbc:db2:apptrack

hibernate.connection.username = admin

hibernate.connection.password = admin

hibernate.connection.pool_size = 20

hibernate.statement_cache.size = 6

hibernate.show_sql = false

database.jar=${postgresql.jar}

database.type=postgresql

database.name=appfuse

database.host=localhost

#database URL for creating other databases

database.admin.url=jdbc:${database.type}://${database.host}/template1

database.admin.username=postgres

database.admin.password=postgres

hibernate.dialect=net.sf.hibernate.dialect.PostgreSQLDialect

database.driver_class=org.postgresql.Driver

database.url=jdbc:${database.type}://${database.host}/${database.name}

database.username=postgres

database.password=postgres

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I haven't yet figured out how to create the ''appfuse'' database using straight SQL, but I did find it to be fairly easy using DB2's "Command Line Processor". Just open the application and type "create db appfuse" - and wait for about 2 minutes.

You can use the database.properties.reference file for other database's settings.

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At this point, running "ant setup-db" will fail because we have no db2-create.sql in metadata/sql. Since the database is already created, I just used "ant db-init". Now onto the errors and ways I fixed them.

I was unable to create databases ''on-the-fly'' (using JDBC) on PostgresSQL (transaction error) or on DB2. Therefore, I changed the "db-create" target to only attempt to do this for MySQL. If you're not using MySQL, you don't need to specify the database.admin.* properties since they won't be used. See the DB2 Sample Script[#6] for creating a new database in the ''Command Line Processor''.

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Now let's looks at tweaks I had to make to AppFuse to make ''easy database switching'' a reality.

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* @hibernate.property

* column="email" not-null="false"

* @hibernate.property column="email" not-null="false"

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__Below is the old way to do it. In 1.3, I modified the ''tomcat-context.xml'' and ''hibernate.cfg.xml'' to get the database-specific attributes replaced at build-time. This eliminates the process below. I'll leave it in here in case you're on an older version of AppFuse.__

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