匕首2清单重新创建

Question

我遇到了使用Dagger2保存“缓存”数据的问题。

我有Application Component和Authentication Subcomponent。 Authentication Subcomponent具有缓存模块：

@Module
class AuthCacheModule {

    @AuthScope
    @Provides
    fun provideGeoLocation(): GeoInfo = GeoInfo()

    @AuthScope
    @Provides
    fun provideLastKnownLocation(): GeoLocation = GeoLocation()

    @AuthScope
    @Provides
    fun provideCountries(): List<Country> = mutableListOf()
}

前两个缓存对象工作正常。国家列表有问题。每次我调用从网络获取或从高速缓存List<Country>获取高速缓存的方法时，始终为空。

override fun getCountryList(): Observable<List<Country>> =
    Observable.just(countries)
        .flatMap {
            when(it.isEmpty()) {
                true -> Rx2Apollo.from(apolloClient.query(GetCountryListQuery()))
                    .map { countryMapper.transformToDomain(it.data()?.countryList()) }
                    .map { saveCountries(it) }
                false -> Observable.just(countries)
            }
        }

private fun saveCountries(items: List<Country>): List<Country> {
    if (countries.isNotEmpty()) {
        (countries as MutableList).clear()
    }
    (countries as MutableList).addAll(items)
    return countries
}