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I have an application that has a remote database(firebase) and local database(room). I get my data from firebase and save it in android room. Also, I use rxjava2 to do that. All posts is get from local database. Everything is okey until here. When I put new child to firebase, it doesnt appear in my application instantly. It is not put in local db. I know that I have to update my remote database every time such as every six hours. I had some researxch to do that. Work Manager and JobScheduler can be used but I dont know how to use that. Is there anyone that give me an advise?
WorkManager, part of Jetpack, is a library by Google, that handle deferrable work that requires a guaranteed execution.
You can read this blog to see if it covers your requirements. The documentation is an excellent starting point and there's a codelab that you can do to try the library itself available both in Java and Kotlin.
WorkManager uses JobScheduler when it runs on API Level 23+, for older Android versions (WorkManager supports API Level 14+) it uses AlarmManager and Broadcast receivers.
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I'm planning to build a web app in such a short time. I'm planning to just use what I've learned in Firebase 8.9.1. However, I've learned that there was a new version of Firebase. These are the functions that I would most probably be using:
Database: Firestore
Will be using Firebase Authentication
The usual CRUD operations
Queries and distributed counters for functions similar to inventories
Firebase Hosting
Are there any big differences between the two versions? And is it alright if I'll just stay with version 8.9.1?
The difference is mostly the syntax but all services work as they used to. I would recommend updating to newer version so you get all the new features from Firebase.
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Almost eveything is done through the database, and so this got me thinking, if I have user accounts, is there a way to create/allow certain things from the database,to be user configurable. For example, say they favorited a song, though it is done through the server, it'll be user base and only affect them.
Is there a way to allow certain things from the main database to be user database as well.
Sorta new to this.
You can definitely use firebase for music streaming ,
for basic upload you can use firebase storage, and use the download link to stream using Audio Players plugin
if you want to compress audios to different qualities you can use Firebase Functions by adding your own javascript to it.
The rest is just data manipulation and user management. You can refer the firebase documentations for more.
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How do I do my business logic on server-side on firebase?
Will the web app still have the benefits of progressive web app if I do this?
Reason to do this: Anybody can run Javascript code on your website if the person knows how to use the developer tools available in modern browsers.
Is firebase Queue (NodeJS on AWS) the way? I am a noob to all this.
You need to write more of your business logic on font-side than traditional way. To make it safe, you need to write access rules carefully on firebase console.
And it's not enough, you also need a server-side, nodejs is a good choice, there are many useful library, such as firebase, firebase-queue, firebase-admin. You can deploy these servers on the google cloud with docker.
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I need to create my own application that is similar windows performance monitor. I want to monitor the DQL using asp.net. But i don't know where to start. I already research but no luck.
Consider using below components (but still remember, it is only a suggestion) to start from:
System.Diagnostics.PerformanceCounter class - to access performance counter data
ASP.NET MVC - to create a website
SignalR - to create a backend Hub for client notifications of data gathered by PerformanceCounter class
DotNet.Highcharts - to create charts control
What is your planned usage of this application? If you are planning to use it for your organization then you might want to consider SaaS solution that allows you to plug in your collector.
You have better uptime on the monitoring application because that monitoring service is the last thing you want to go down. You are probably more familiar with how to monitor DQL than to create an application that does charting and alerting. You should be able to get something going within days instead of weeks.
Monitoring is normally composed of collecting, storing and charting. A good SaaS monitoring tool will do well with storing and charting and you need to look for ones with plugin framework that allow you to decide what to collect.
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I'm totally confused about what kind of applications can I write If I learn how to use Enginio. This is what the Enginio site says:
With Enginio, you can create stunning Qt applications, add a scalable
and powerful Qt cloud backend as a service in no time and deploy in
minutes without ever bothering about backend servers or scalability
problems.
Can I think of Enginio as a remote QFile or is it much more bigger? Can someone name some samples written with Qt + Enginio.
It looks like this is a new service still in development, hence there isn't a tag for it, yet.
From the website, it looks like they provide you with some of the common things all applications need, and provide an interface for qt. You can basically create whatever you want.
Instead of providing only a remote file, they also let you store json objects, lowering some of the impedance between object and file.
Probably not too many examples with this new thing. Maybe you can ask them to provide more samples.