Questions tagged [rx-java]
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences
31
questions
3
votes
0answers
326 views
Android+Firebase testing using Mockito
I have an interactor/usecase class in my application. My application follows MVVM architecture with interactor/usecases responsible for logic (e.g. get data from api-service, store in local-database ...
2
votes
0answers
56 views
Listing YouTube videos using API with RxJava
I am new to RxJava and have the following code which I use to search YouTube videos via the API and ultimately display them in a list.
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1
vote
0answers
59 views
Consuming APi using Rx in an MVP project
I would like to have some input here if possible, this code should make a request to an API and the call should return the desired object. The client to make the requests was made with Retrofit and ...
1
vote
0answers
22 views
Conditionally perform asynchronous actions with RxJava
This seems to work fine however I'm sure there must be a neater way. The outcome should be:
If isHidden == true then call canHideAccount. canHideAccount returns a Single.
If isHidden != true then ...
4
votes
2answers
67 views
Parsing CAN frames from a ByteArray
Here's my method used for parsing a ByteArray into multiple frames of CAN interface. It works now correctly but it's somewhat ugly in my opinion.
It's written in ...
0
votes
1answer
164 views
Async Task using RxJava2 in Android
I have tried to create the async task using the RxJAVA2. The code is working fine. WHat enhancement can I do in this code?
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2
votes
1answer
278 views
About handling data from an API call through RX and Retrofit
I started using Retrofit and RxJava recently and I love it. I am working on an Android project and I am following MVP Repository pattern as specified in Android Architecture Components. I'm still ...
1
vote
0answers
68 views
Pushing a value to a Processor on a separate thread
I am attempting to use Room along with a full-text search (FTS) table. The issue is that Room doesn't recognize or support FTS tables. Though there is a work around for this; you just create the FTS ...
1
vote
0answers
72 views
Subscribing to multiple sources in RxJava
I have used RxJava to Observe multiple sources and then perform action depending upon values of Observables. I want to know if it can be further simplified.
Goal:
Complete implementation of RxJava.
...
3
votes
1answer
103 views
Getting products for category
I have a PR for a bugfix in which the fix is just 4 characters. In this situation we are invited to make some refactoring on the class that we are touching if possible.
Venkat Subramaniam's advice is ...
1
vote
0answers
47 views
Code which buffers objects and schedules saving them from buffers, after applied some actions to it
Originally i have a function like this:
...
1
vote
0answers
274 views
My first use of RX-java with Kotlin and vertx
I extracted a small part of my project, it is a workflow engine based on vertx rx-java and Kotlin. This part represent the code use to manage Bpmn Service task. The workflow is a stack of ServiceTask ...
0
votes
1answer
158 views
Dagger 2 test application
I have a complicated Dagger 2 use case on Android, where I have a lot of dependencies, but some of them are really slow to construct. Like 2-3 seconds slow.
My solution was to create an RX ...
3
votes
0answers
889 views
RxJava2 custom Observable
I'm trying to understand how to bridge receiver-based events to the Reactive world. I asked a question on SO and was pointed to a different approach. The author of that answer (David Karnok) is ...
3
votes
0answers
2k views
Repository pattern with Specification queries
I'm working on an Android (Java) project which utilizes different analytic metrics (sum of x group by date, sum of x group by id, etc) and I am projecting the data sets into different charts using ...
2
votes
0answers
46 views
Asynchronous service that publishes a possibly infinite amount of events
I want to implement a service that fetches eyetracking events and publishes them to all subscribers of the stream. The whole thing is supposed to run asynchronously, so it doesn't block the UI thread. ...
4
votes
1answer
158 views
Creating new async tasks
In the past, I have used AsyncTasks to perform network requests for my Android app. I recently switched to RxJava to be able to cancel the requests when the user exits an activity. I have created a ...
5
votes
0answers
113 views
User role Observable
I have a service with these methods:
Observable<User> getUsers();
Observable<Role> getUserRoles(String userId);
For each user, I want to get her ...
2
votes
0answers
70 views
Refactoring App launch sequence using reactive programming
In the SplashActivity of my Android Application, the following sequence of events occur:
Check if Google Play Services is installed
If Google Play Services are ...
4
votes
1answer
5k views
Testing a ViewModel in Android - MVVM with DataBinding
I am using MVVM pattern with databinding. I have written tests. But I want them reviewed. The test is related to JUnit test on the ViewModel.
FeedViewModelTest....
0
votes
1answer
91 views
Finding the mean using RxJava
I'm learning RxJava and this is what I attempted to find the mean of 'n' transactions.
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1
vote
0answers
48 views
Testing a method which coordinates multiple objects
I have this class with one method, which uses three different objects to perform a task.
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0
votes
1answer
502 views
Getting data with RxJava and retrofit
I am using RxJava with retrofit to get data from an API then filtering the data with a for loop in the onNext Method. Is there ...
3
votes
2answers
870 views
Cache of shared observables (Rx)
So the idea is to maintain a cache of shared Observables - accessible by a key - which if not present will produce one using the given factory.
The underlying shared Observable is accessed via an ...
3
votes
1answer
67 views
RXJava operate on exiting List instead of creating new
I'm dipping my toes in to RXJava for the first time. The function below works just fine but I can't help thinking it can be improved. For instance I'm sure that I'm unnecessarily creating a new ...
5
votes
1answer
630 views
Finding local C# servers on a Java client using UDP and reactive extensions
This program uses UDP broadcast to find app servers on the local network. When a server receives a client broadcast, it sends a port (integer) to the client which will later be used to create a TCP ...
1
vote
1answer
225 views
Android UI code for a test job
I wrote my first Android UI application for a test job, but it was declined as employer said that he did't like "the code quality". He didn't specify what he meant. But I'm very interesting to know ...
3
votes
1answer
1k views
Manager for OAuth2 tokens using RxJava
I have a class in my application which manages storage of OAuth2 tokens. There are unauthenticated tokens (in my code, called "application access tokens") which can be used for API calls that do not ...
3
votes
1answer
479 views
Coordinating Threads with Reactive Streams
I just started learning reactive streams with RxJava. After reading a couple of books and a lot of articles our there I am still having trouble understanding how to coordinate multiple threads.
I ...
3
votes
0answers
536 views
Using combinations of OR and AND filters with RxJava
I'm trying to work out a way to create a combination of OR and AND filters in RxJava. Here's what I've done so far:
...
4
votes
1answer
507 views
Using a Subject to trigger a music list to reload
In my Android app I have a Service that is periodically polling a server for a music playlist XML. For certain occasions I also want to trigger a reload manually.
I am using Retrofit for the server ...
