services.publix.workers

Class GeneralSingleCookieService

java.lang.Object

services.publix.workers.GeneralSingleCookieService

@Singleton
public class GeneralSingleCookieService
extends java.lang.Object

Manages the GeneralSingle cookie. This cookie exists only with GeneralSingle workers. In this cookie is stored which studies where done in the browser where the cookie originates. This provides an easy way to check whether a GeneralSingle worker tries to run the same study a second time (which is not allowed). Note, that it is easy to get around this mechanism by deleting the cookie in the browser. A GeneralSingle cookie consists of a list of tuples storing the study ID and worker ID. With the cookie's data it is possible to determine whether in this browser this study was done already with a GeneralSingle worker and by which worker it was done.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	COOKIE_NAME

Constructor Summary

Constructors

Constructor and Description
GeneralSingleCookieService()

Method Summary

Modifier and Type	Method and Description
java.lang.String	addStudy(Study study, Worker worker, play.mvc.Http.Cookie generalSingleCookie) If the cookie is not null it adds a new tuple (study's UUID and worker ID) to the cookie's value and returns it.
java.lang.Long	fetchWorkerIdByStudy(Study study) Returns the worker ID of the GeneralSingleWorker that belongs to the given study - or null, if it doesn't exist.
void	set(java.lang.String cookieValue) Sets the cookieValue as the new GeneralSingle cookie.
void	set(Study study, Worker worker) Sets the cookie in the response.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COOKIE_NAME

public static final java.lang.String COOKIE_NAME

See Also:

Constant Field Values

Constructor Detail

GeneralSingleCookieService

public GeneralSingleCookieService()

Method Detail

fetchWorkerIdByStudy

public java.lang.Long fetchWorkerIdByStudy(Study study)

Returns the worker ID of the GeneralSingleWorker that belongs to the given study - or null, if it doesn't exist. If the study was run before the study UUID has been stored together with the worker ID in the cookie.

set

public void set(java.lang.String cookieValue)

Sets the cookieValue as the new GeneralSingle cookie. This cookie is HTTP only and has an expire date in the far future.

set

public void set(Study study,
                Worker worker)

Sets the cookie in the response. The cookie will contain all GeneralSingle studies done in this browser and adds the given study (and worker). This cookie is HTTP only and has an expire date in the far future.

addStudy

public java.lang.String addStudy(Study study,
                                 Worker worker,
                                 play.mvc.Http.Cookie generalSingleCookie)

If the cookie is not null it adds a new tuple (study's UUID and worker ID) to the cookie's value and returns it. If the cookie is null (this browser never did a general single run) it returns the new cookie's value which is just the tuple.