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feat(bootstrap): add platform and app initializers

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Often some init logic needs to run when a platform or an application is boostrapped.
For example, boostraping a platform requires initializing the dom adapter.
Now, it can be done as follows:

new Provider(PLATFORM_INITIALIZER, {useValue: initDomAdapter, multi: true}),

All platform initializers will be run after the platform injector has been created.

Similarly, all application initializers will be run after the app injector has been
created.

Closes #5355
This commit is contained in:
vsavkin
2015-11-18 09:18:37 -08:00
committed by Victor Savkin
parent 3fa287aae2
commit 3c43a8c549
9 changed files with 80 additions and 19 deletions
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11
modules/angular2/src/core/application_tokens.ts
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@ -48,3 +48,14 @@ export const APP_ID_RANDOM_PROVIDER: Provider =
function _randomChar(): string {
return StringWrapper.fromCharCode(97 + Math.floor(Math.random() * 25));
}
/**
* A function that will be executed when a platform is initialized.
*/
export const PLATFORM_INITIALIZER: OpaqueToken =
CONST_EXPR(new OpaqueToken("Platform Initializer"));
/**
* A function that will be executed when an application is initialized.
*/
export const APP_INITIALIZER: OpaqueToken = CONST_EXPR(new OpaqueToken("Application Initializer"));