Difference between revisions of "GOCDB/Doctrine"
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Revision as of 12:58, 17 December 2012
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By replacing the PROM model with the Doctrine ORM GOCDB will support RDBMSs other than Oracle.
- Write code once, deploy to Oracle, MySQL, Postgres, SQLite.
- Much simpler than the GOCDB/PROM model (see below)
The move to Doctrine will introduce changes to the GOCDB portal URLs and to the PRIMARY KEY, ID and GOCDB_PORTAL_URL fields of the GOCDB PI.
In PROM, each "entity" (site, service endpoint, downtime) was assigned an ID from a global pool. There is only one object 123, the GRIDOPS-GOCDB site. The following URL is used to access an entity regardless of type:
In Doctrine, each entity receives an ID unique only to that entity type. There is a site with ID 123, a service endpoint with ID 123 and a downtime with ID 123. The new URL will reflect the entity type:
(...and so on for each GOCDB entity type)
In the GOCDB PI there are a number of PROM specific fields that will change if we move to Doctrine: PRIMARY_KEY, ID and GOCDB_PORTAL_URL. These are highlighted below:
The PRIMARY_KEY and ID fields are generated by PROM and will no longer be available. We intend to replace these with similar values from Doctrine.
We would like to remove the ID field entirely and use the primary key only. The primary key will be purely numeric and unique only to the specific entity type (e.g. there will be a Site with ID 5 and a Service Endpoint with ID 5).