This a sample REST application written in Java. It's purpose is to create a generic project that can be used as a starting point for a new project, but also for learning efforts (I am building an open game database at www.oregami.org).

• built on Dropwizard version 0.7.0
• dependency injection with Google Guice (no Spring dependencies!)
• Hibernate / JPA 2.1 as database access framework
• HSQLDB as database
• read database configuration from Dropwizard yaml config file, persistence.xml is not used
• "Session-per-HTTP-request" with Guice PersistentFilter
• suport for cross-origin resource sharing
• JPA entities with UUIDs as primary keys
• Auditing/Version control of entities with hibernate envers
• authentication with JSON Web Token via dropwizard-auth-jwt
• Integration tests with rest-assured
• a pattern for accessing and manipulation entities with HTTP REST calls (Resource => Service => DAO => entity)
• a pattern for ServiceResult objects which contain ServiceErrorMessages (which can later be bound to web form fields in the client)

Feel free to suggest corrections, optimizations or extensions via pull requests!

A corresponding JavaScript client application (AngularJS) is available at https://github.com/oregami/angularjs-rest-client/

• more complex entities
• hypermedia / HATEOAS

• Start the application with the class "ToDoApplication" with the parameters "server todo.yml".

• List all tasks with:

    GET => http://localhost:8080/task
  

• Add a new task with:

    POST => http://localhost:8080/task
  

  Header:

    Content-Type:application/json
  

  JSON-Body e.g. :

    {"name" : "task 1", "description" : "This is a description"}
  

• Modify a task:

    PUT => http://localhost:8080/task/[id]
  

  Header:

    Content-Type:application/json
    Accept:application/json
  

  JSON-Body e.g.:

    {
    "id": "402880944687600101468760d9ea0000",
    "version": "0",
    "name": "task 1 with new name",
    "description": "This is an updated description",
    "finished": "false"
    }
  

• Remove a task:

    DELETE => http://localhost:8080/task/[id]
  

• List all revision numbers of a task with:

    GET => http://localhost:8080/task/[id]/revisions
  

• Show a single task with:

    GET => http://localhost:8080/task/[id]      
  

• Show a special revision of a single task with:

    GET => http://localhost:8080/task/[id]/revisions/[revisionNumber]
  

• Create JSON Web Token for authentication:

    POST => http://localhost:8080/jwt/login?username=[username]&password=[password]
    e.g. with user1/password1 or user2/password2
  

• Check if your JSON Web Token is valid for authentication:

    GET => http://localhost:8080/jwt/test
    Authentication-Header: "Bearer [token]"
  

I recommend you use the great chrome extension Postman to make such HTTP calls!

see http://wiki.oregami.org/display/DTA/Data+Model