"Fossies" - the Fresh Open Source Software Archive

Member "grails-core-5.2.4/grails-docs/src/test/resources/docs/ref/Services/scope.html" (14 Sep 2022, 59714 Bytes) of package /linux/www/grails-core-5.2.4.tar.gz:


Caution: In this restricted "Fossies" environment the current HTML page may not be correctly presentated and may have some non-functional links. You can here alternatively try to browse the pure source code or just view or download the uninterpreted raw source code. If the rendering is insufficient you may try to find and view the page on the grails-core-5.2.4.tar.gz project site itself.

(Quick Reference)

scope

Purpose

Changes the scope of a service

Examples

class BookService {
    static scope = "session"
    ...
}

Description

By default services are "singleton" scoped which means that clients of a service only ever use a single instance (a singleton) of the service. This behaviour can be changed by specifying a scope attribute with on the following values:

  • prototype - A new service is created every time it is injected into another class

  • request - A new service will be created per request

  • flash - A new service will be created for the current and next request only

  • flow - In web flows the service will exist for the scope of the flow

  • conversation - In web flows the service will exist for the scope of the conversation. ie a root flow and its sub flows

  • session - A service is created for the scope of a user session

  • singleton (default) - Only one instance of the service ever exists

See Scoped Services in the user guide for more information.