Using Redis with - or without - hybernate

gistfile1.txt

>> Using Redis Standalone > must uninstall the Hybernate plugin

    grails uninstall-plugin hibernate

With this done all domain classes in grails-app/domain will be persisted via Redis and not Hibernate.


>> If you want to persist a particular domain class with Redis then you must use the mapWith property in the domain class:

    static mapWith = "redis"


>> Combining Redis and Hibernate

persist Hibernate entities to Redis using special redis scope

   def hibernatePerson = Person.get(1)
   hibernatePerson.redis.save()

   def redisPerson = Person.redis.get(1)

use Redis as a cache for Hibernate entities and take advantage of some nice Redis features:

   def people = Person.list()
   people.each { person -> person.redis.save() }
   def randomRedisPerson = Person.redis.random()

Object Mapping
Here is an example of a domain class that can be persisted to Redis:

class Person {
    String firstName
    String lastName

    static constraints = {
        firstName blank:false
        lastName blank:false
    }

    static mapping = {
        lastName index:true
    }
}

key difference with GORM for Redis is you must specify the properties you want to index 

     Person.findByLastName("Simpson")

unlike SQL where every single property can be queried with Redis you must specify which properties can be queried up front.