Question

I am unable to set my inbuilt database to “update“.
It is always cleared when I leave the app, as if still on ‘create-drop‘.

It may be useful to know that I was using a MySQL database, and reverted back to in-built database to be able to share the project with some friends whom will not know how to set a SQL database, or a Tomcat server.

Here is my DataSource.groovy file:

dataSource {
    pooled = true
    driverClassName = "org.h2.Driver"
    username = "sa"
    password = ""
}
hibernate {
    cache.use_second_level_cache = true
    cache.use_query_cache = true
    cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory'
}
// environment specific settings
environments {
    development {
        dataSource {
            dbCreate = "update" // one of 'create', 'create-drop', 'update', 'validate', ''
            url = "jdbc:h2:mem:myAppDevDb;MVCC=TRUE"
        }
    }
    test {
        dataSource {
            dbCreate = "update"
            url = "jdbc:h2:mem:myAppTestDb;MVCC=TRUE"
        }
    }
    production {
        dataSource {
            dbCreate = "update"
            url = "jdbc:h2:myAppProdDb;MVCC=TRUE"
            pooled = true
            properties {
                maxActive = -1
                minEvictableIdleTimeMillis=1800000
                timeBetweenEvictionRunsMillis=1800000
                numTestsPerEvictionRun=3
                testOnBorrow=true
                testWhileIdle=true
                testOnReturn=true
                validationQuery="SELECT 1"
            }
        }
    }
}

Any help greatly appreciated.
Thanks in advance.

Answer 1

The problem is that your datasource is configured as an in memory datasource so it is discarded when the jvm exits. If you configure your H2 URL to use a file instead you should be able to save the database.

development {
    dataSource {
        dbCreate = "update"
        url = "jdbc:h2:somefile:myAppDevDb;MVCC=TRUE"
    }
}