in-memory-persistence-strategy.md

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In Memory Persistence Strategy	This document provides details about the In Memory Persistence Strategy service in the Components Library.	concept-topic-template	Nov 21, 2023	/docs/marketplace/dev/front-end/202212.0/ui-components-library/persistence/in-memory-persistence-strategy.html /docs/scos/dev/front-end-development/202204.0/marketplace/ui-components-library/persistence/in-memory-persistence-strategy.html /docs/scos/dev/front-end-development/202311.0/marketplace/ui-components-library/persistence/in-memory-persistence-strategy.html	title link Persistence docs/dg/dev/frontend-development/page.version/marketplace/ui-components-library/persistence/persistence.html title link Local Storage Persistence Strategy docs/dg/dev/frontend-development/page.version/marketplace/ui-components-library/persistence/local-storage-persistence-strategy.html title link Url Persistence Strategy docs/dg/dev/frontend-development/page.version/marketplace/ui-components-library/persistence/url-persistence-strategy.html

This document explains the In Memory Persistence Strategy service in the Components Library.

Overview

In Memory Persistence Strategy is an Angular Service that stores data in memory and will be lost when the browser page is reloaded.

Check out an example usage of the In Memory Persistence Strategy.

Service configuration:

• storage—persistence strategy type.

<spy-select
    [datasource]="{
        type: 'http',
        ...,
        cache: {
            ...,
            storage: 'in-memory',
        },
    }"
>
</spy-select>

Service registration

Register the service:

declare module '@spryker/persistence' {
    interface PersistenceStrategyRegistry {
        'in-memory': InMemoryPersistenceStrategy;
    }
}

@NgModule({
    imports: [
        PersistenceModule.withStrategies({
            'in-memory': InMemoryPersistenceStrategy,
        }),
    ],
})
export class RootModule {}

Interfaces

Below you can find interfaces for the In Memory Persistence Strategy:

interface InMemoryPersistenceStrategy extends PersistenceStrategy {
    save(key: string, value: unknown): Observable<void>;
    retrieve<T>(key: string): Observable<T | undefined>;
    remove(key: string): Observable<void>;
}