This application is a sandbox for learning play:

It currently utilizes the following: mysql, oracle, slick and typesafe management console.

Database: Mysql or Oracle

In "application.conf" as well as specifying the database properties..you will need designate which database to use by setting the property below: mySlickApp.database = "oracle"

Actors: OptimisticLockSupervisor, UpdateCoffeesAndRelationsActor

Contollers: ActorController

The following example demonstrates how actors can be used to implement an optimistic lock strategy.

The design consists of a supervisor actor called OptimisticLockSupervisor. This actor is responsible for creating a child actor called UpdateCoffeesAndRelationsActor. Within this actor slick is used to get the latest version from the Coffees table and then increment the value and then store this new value in a table called CoffeeVersions as well as updating the Coffees table. The version column in the tables CoffeeVersions and Coffees table have to be unique.

The number of instances of the UpdateCoffeesAndRelationsActor will be set to a value of 6. This will increase the probability of one of the database operations failing. If this occurs then within the supervisor the UpdateCofeesAndRelationsActor will be restarted.

After starting play..type the http://localhost:9000/actorIntegration

GStreamer -- Installation

GST_PLUGIN -- make sure this is not set.. This needs to be set for gst-inspect to work OSSBUILD_GST -- make sure this is not set..