[英]Dependence of one Observable on another RxJava2
There is a class, it has observable fields. 有一个类,它具有可观察的字段。 I want to update
localData
我想更新
localData
when receiving remote data remoteData
, for some reason I can not get data in localData
, debugging does not go to a breakpoint even to getIdsInDatumsRemote ()
. 当接收远程数据
remoteData
,由于某种原因我无法在localData
获取数据,因此localData
调试getIdsInDatumsRemote ()
也不会转到断点。 The identifyDatumsForUpdate ()
method gets an empty Observable. identifyDatumsForUpdate ()
方法获取一个空的Observable。
class DiskDatumDataStore {
var remoteData: Observable<Data>? = null
var localData: Observable<Data>? = null
override fun sync() {
remoteDatums = getChangedRemoteData(lastUpdated!!, 1000)!!
localDatums = remoteDatums!!.map {
getIdsInDatumsRemote(it)
}.map {
it.map {
it.toLong()
}
}.flatMap {
getOldLocalData(it)
}
identifyDatumsForUpdate(datumsForUpdateLocal, datumsForUpdateRemote)
}
override fun getOldLocalData(remoteDatumsIds: List<Long>): Observable<List<DataLayerTypesOfResponsibility>> {
return Observable.fromCallable { repository.getOldDatum(remoteDatumsIds) }
}
}
You're not subscribing
to your Observable
. 您没有
subscribing
Observable
。 You're just creating it. 您只是在创建它。
localDatums = remoteDatums!!.map {
getIdsInDatumsRemote(it)
}.map {
it.map {
it.toLong()
}
}.flatMap {
getOldLocalData(it)
}.subscribe { it->
//do something with the result `it`
}
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