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@sourceloop/cache
Advanced tools
A Caching component that provides helpers for caching in Loopback4 based microservices.
Install CachingComponent using npm
;
$ [npm install | yarn add] @sourceloop/cache
Configure and load CachingComponent in the application constructor as shown below.
import {CachingComponent} from '@sourceloop/cache';
// ...
export class MyApplication extends BootMixin(
ServiceMixin(RepositoryMixin(RestApplication)),
) {
constructor(options: ApplicationConfig = {}) {
this.bind(CacheComponentBindings.CacheConfig).to({
ttl: 1000,
strategy: RedisStoreStrategy,
datasourceName: 'redisCacheStore',
});
this.component(CachingComponent);
// ...
}
// ...
}
To add caching to a repository, just add it as a mixin to the base class -
export class TestWithMixinRepository extends CacheMixin(
DefaultCrudRepository<Test, number, {}>,
) {
cacheIdentifier = 'testRepo';
constructor(@inject('datasources.memorydb') dataSource: juggler.DataSource) {
super(Test, dataSource);
}
}
To add caching to a service or controller, just implement the ICachedService
interface, adding a binding for the ICacheService
and the applying the relevant decorators to the methods you want cached -
export class TestController implements ICachedService {
constructor(
@repository(TestWithoutCachingRepository)
public testModelRepository: TestWithoutCachingRepository,
@inject(CacheComponentBindings.CacheService)
public cache: ICacheService,
) {}
cacheIdentifier = 'testRepo';
@cacheInvalidator()
@post('/tests')
@response(200, {
description: 'Test model instance',
content: {'application/json': {schema: getModelSchemaRef(Test)}},
})
async create(
@requestBody({
content: {
'application/json': {
schema: getModelSchemaRef(Test, {
title: 'NewTest',
exclude: ['id'],
}),
},
},
})
testModel: Omit<Test, 'id'>,
): Promise<Test> {
return this.testModelRepository.create(testModel);
}
// ...
@cachedItem()
@get('/tests/count')
@response(200, {
description: 'Test model count',
content: {'application/json': {schema: CountSchema}},
})
async count(@param.where(Test) where?: Where<Test>): Promise<Count> {
return this.testModelRepository.count(where);
}
/// ...
FAQs
A caching extension to cache methods.
We found that @sourceloop/cache demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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