A Dart Client for Supabase Realtime Server

realtime-dart

Listens to changes in a PostgreSQL Database and via websockets.

A dart client for Supabase Realtime server.

Usage

Creating a Socket connection

You can set up one connection to be used across the whole app.

import 'package:realtime_client/realtime_client.dart';

var client = RealtimeClient(REALTIME_URL);
client.connect();

Socket Hooks

client.onOpen(() => print('Socket opened.'));
client.onClose((event) => print('Socket closed $event'));
client.onError((error) => print('Socket error: $error'));

Disconnect the socket

Call disconnect() on the socket:

client.disconnect()

Credits

  • https://github.com/supabase/realtime-js - ported from realtime-js library

License

This repo is licensed under MIT.

Use this package as a library

Depend on it

Run this command:

With Dart:

 $ dart pub add realtime_client

With Flutter:

 $ flutter pub add realtime_client

This will add a line like this to your package's pubspec.yaml (and run an implicit dart pub get):

dependencies:
  realtime_client: ^0.1.11

Alternatively, your editor might support dart pub get or flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:realtime_client/realtime_client.dart'; 

example/main.dart

import 'package:realtime_client/realtime_client.dart';

/// Example to use with Supabase Realtime https://supabase.io/
Future<void> main() async {
  final socket = RealtimeClient(
    'ws://SUPABASE_API_ENDPOINT/realtime/v1',
    params: {'apikey': 'SUPABSE_API_KEY'},
    // ignore: avoid_print
    logger: (kind, msg, data) => {print('$kind $msg $data')},
  );

  final channel = socket.channel('realtime:public');
  channel.on('DELETE', (payload, {ref}) {
    print('channel delete payload: $payload');
  });
  channel.on('INSERT', (payload, {ref}) {
    print('channel insert payload: $payload');
  });

  socket.onMessage((message) => print('MESSAGE $message'));

  // on connect and subscribe
  socket.connect();
  channel.subscribe().receive('ok', (_) => print('SUBSCRIBED'));

  // delay 20s to receive events from server
  await Future.delayed(const Duration(seconds: 20));

  // on unsubscribe and disconnect
  channel.unsubscribe();
  socket.disconnect();
} 

Download Details:

Author: supabase

Source Code: https://github.com/supabase/realtime-dart

#dart #realtime

What is GEEK

Buddha Community

A Dart Client for Supabase Realtime Server

A Dart Client for Supabase Realtime Server

realtime-dart

Listens to changes in a PostgreSQL Database and via websockets.

A dart client for Supabase Realtime server.

Usage

Creating a Socket connection

You can set up one connection to be used across the whole app.

import 'package:realtime_client/realtime_client.dart';

var client = RealtimeClient(REALTIME_URL);
client.connect();

Socket Hooks

client.onOpen(() => print('Socket opened.'));
client.onClose((event) => print('Socket closed $event'));
client.onError((error) => print('Socket error: $error'));

Disconnect the socket

Call disconnect() on the socket:

client.disconnect()

Credits

  • https://github.com/supabase/realtime-js - ported from realtime-js library

License

This repo is licensed under MIT.

Use this package as a library

Depend on it

Run this command:

With Dart:

 $ dart pub add realtime_client

With Flutter:

 $ flutter pub add realtime_client

This will add a line like this to your package's pubspec.yaml (and run an implicit dart pub get):

dependencies:
  realtime_client: ^0.1.11

Alternatively, your editor might support dart pub get or flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:realtime_client/realtime_client.dart'; 

example/main.dart

import 'package:realtime_client/realtime_client.dart';

/// Example to use with Supabase Realtime https://supabase.io/
Future<void> main() async {
  final socket = RealtimeClient(
    'ws://SUPABASE_API_ENDPOINT/realtime/v1',
    params: {'apikey': 'SUPABSE_API_KEY'},
    // ignore: avoid_print
    logger: (kind, msg, data) => {print('$kind $msg $data')},
  );

  final channel = socket.channel('realtime:public');
  channel.on('DELETE', (payload, {ref}) {
    print('channel delete payload: $payload');
  });
  channel.on('INSERT', (payload, {ref}) {
    print('channel insert payload: $payload');
  });

  socket.onMessage((message) => print('MESSAGE $message'));

  // on connect and subscribe
  socket.connect();
  channel.subscribe().receive('ok', (_) => print('SUBSCRIBED'));

  // delay 20s to receive events from server
  await Future.delayed(const Duration(seconds: 20));

  // on unsubscribe and disconnect
  channel.unsubscribe();
  socket.disconnect();
} 

Download Details:

Author: supabase

Source Code: https://github.com/supabase/realtime-dart

#dart #realtime

Ray  Patel

Ray Patel

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Python Packages in SQL Server – Get Started with SQL Server Machine Learning Services

Introduction

When installing Machine Learning Services in SQL Server by default few Python Packages are installed. In this article, we will have a look on how to get those installed python package information.

Python Packages

When we choose Python as Machine Learning Service during installation, the following packages are installed in SQL Server,

  • revoscalepy – This Microsoft Python package is used for remote compute contexts, streaming, parallel execution of rx functions for data import and transformation, modeling, visualization, and analysis.
  • microsoftml – This is another Microsoft Python package which adds machine learning algorithms in Python.
  • Anaconda 4.2 – Anaconda is an opensource Python package

#machine learning #sql server #executing python in sql server #machine learning using python #machine learning with sql server #ml in sql server using python #python in sql server ml #python packages #python packages for machine learning services #sql server machine learning services

Luna  Mosciski

Luna Mosciski

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A light on Client-Server, and Communication Techniques in between.

When I was pretty beginners in the programming world and I began building the front-end applications, then constantly I was playing a puzzle in my mind that how I am alone can implement a complete application include client and server both, and if I want to implement that then I need to know the server-side technologies and it was not possible until one day I started developing both front-end and backend/server application.

Then I got to understand that I am going moving to be a full stack developer.

Nevertheless, that’s a really hard story of learning lots of different technologies so now I am going to share the conceptual summary of the client and server-side applications and how they interact with each other.

It is not so challenging for anyone to implement both client and server applications.

Before diving into developing applications immediately we should learn the communication concept within both applications and how to start developing both applications as a full stack developer without any difficulty.

This topic can be explained in several ways but I split it into three modules.

  1. Client.
  2. Server.
  3. Communication chanal/techniques.

Client:

When it comes to the client, That can be any interface with or without UI where a user will be interacting or will perform serval operations and the result of those operations will be either fetchinggenerating, or **showing **some data.

“let’s not make it complex at all to understand the real-world example and use case.”

“The best case is where you reading this piece of information”

This is a web application and it is an example of a client where a user acts for searching the topic and the result of that is a particular write-up will be shown on the web page.

Let’s see examples of front end applications and what are the programming technologies are available for client-side development.

Image for post

Client-side Technologies

  • As I have not presented any stress on listing down the technologies names the reason is one can use any programming language and design something.
  • The result will be some software and it depends on the nature of the software whether it is client-side or server-side software.
  • Mainly Web Applications and Mobile Applications come in mind when someone thinks about the client-side application let’s list down nature of the client-side application.
  • Any application whether it runs on Phone, Computer, Watches, Car, or any hardware exits on the planet has this nature is a client-side application.

Users can interact.

Users can request to see the data.

Users can change the data without knowing how it is happening internally.

Users can perform any action that changes shows, changes, or stores data.

“Who considers user understands how it is happening or not”

All the applications have the equivalent nature are client-side

Now there is no point in arguing on the technologies that we should consider Java and Python are client-side or server-side technologies.

If we design UI with them where the user interacts yeah we are using them as client-side languages.

#database #protocol #clients #servers #client-server

Brain  Crist

Brain Crist

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SCHEMAS in SQL Server -MS SQL Server – Zero to Hero Query Master

Introduction

This is part 3 of “MS SQL Server- Zero to Hero” and in this article, we will be discussing about the SCHEMAS in SQL SERVER. Before getting into this article, please consider to visit previous articles in this series from below,

A glimpse of previous articles
Part 1

In part one, we learned the basics of data, database, database management system, and types of DBMS and SQL.

Part 2
  • We learned to create a database and maintain it using SQL statements.
  • Best practice methods were also mentioned.

#sql server #benefits of schemas #create schema in sql #database schemas #how to create schema in sql server #schemas #schemas in sql server #sql server schemas #what is schema in sql server

Michael  Hamill

Michael Hamill

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Get Started with SQL Server Machine Learning Services

We know Humans learn from their past experiences. Mean while Machines follow Instructions given by Humans. But what if Human can train Machines to learn from the past data?. In simple, this is what Machine learning is !!!. SQL Server has capabilities of Machine Learning. In this article, we will discuss about the capabilities of Machine Learning in SQL Server.

#machine learning #sql server #machine learning with sql server #ml in sql server using python #python in sql server ml #sql server machine learning services