Live and reactive PouchDB bindings for Vuejs

vue-pouch

Reactive Vue bindings for PouchDB using pouchdb-live-find.

Examples

Todo App with real-time 4-way data syncing: DOM <-> Vue <-> IndexedDB <-> CouchDB

Try this example here: https://buhrmi.github.io/vue-pouch/

<template>
  <div class="todos">
    <input v-model="message" placeholder="New Todo">
    <button @click="$pouch.post('todos', {message: message});message=''">Save Todo</button>
    <div v-for="todo in todos">
      <input v-model="todo.message" @change="$pouch.put('todos', todo)">
      <button @click="$pouch.remove('todos', todo)">Remove</button>
    </div>
  </div>
</template>

<script>
  export default {
    // VuePouch adds a `pouch` config option to all components.
    pouch: {
      // The simplest usage. queries all documents from the "todos" pouch database and assigns them to the "todos" vue property.
      todos: {/*empty selector*/}
    },
    created: function() {
      // Send all documents to the remote database, and stream changes in real-time
      this.$pouch.sync('todos', 'http://localhost:5984/todos');
    }
  }
</script>

Reactive & Live Selectors (Mango Queries)

<template>
  Show people that are <input v-model="age"> years old.
  <div v-for="person in people">
    {{ person.name }}
  </div>
</template>

<script>
  export default {
    data () {
      return {
        resultsPerPage: 25,
        currentPage: 1
      }
    },
    // Use the pouch property to configure the component to (reactively) read data from pouchdb.
    pouch: {
      // The function returns a Mango-like selector that is run against the `people` database.
      // The result of the query is assigned to the `people` property.
      people: function() {
        if (!this.age) return;
        return {age: this.age, type: "person"}
      },
      // You can also specify the database dynamically (local or remote), as well as limits, skip and sort order:
      peopleInOtherDatabase: function() {
        return {
          database: this.selectedDatabase, // you can pass a database string or a pouchdb instance
          selector: {type: "person"},
          sort: [{name: "asc"}],
          limit: this.resultsPerPage,
          skip: this.resultsPerPage * (this.currentPage - 1)
        }
      }
    }
  })
</script>

Single documents

If you only want to sync a single document that matches a selector, use first: true:

module.exports = {
  // ...
  pouch: {  
    projectDetails: function() {
      return {
        database: 'mydatabase',
        selector: {_id: this.selectedProjectId},
        first: true
      }
    }
  }
  // ...
}

Installation

Install via npm:

npm install --save vue-pouch

The only requirement is that pouchdb-live-find is installed:

import PouchDB from 'pouchdb-browser'
PouchDB.plugin(require('pouchdb-find'));
PouchDB.plugin(require('pouchdb-live-find'));

If you want to use remote databases (CouchDB, Cloudant, etc.), you should also install the authentication plugin:

PouchDB.plugin(require('pouchdb-authentication'));

Then, plug VuePouch into Vue:

Vue.use(require('vue-pouch'), {
  pouch: PouchDB,    // optional if `PouchDB` is available on the global object
  defaultDB:         // the database to use if none is specified in the pouch setting of the vue component
})

API

$pouch

$pouch is made available on all vue instances and has some helper functions. Note that this API is not stable and will probably change.

Methods

• $pouch.sync(localDatabase, remoteDatabase): Basically the same as PouchDB.sync(local, remote, {live: true, retry: true}). Also, if the browser has an active session cookie, it will fetch session data (username, etc) from the remote server. BONUS: If your remote database runs CouchDB 2.0 or higher, you can also specify a Mango Selector that is used to filter documents coming from the remote server.

For example

$pouch.sync('complaints', 'https:/42.233.1.44/complaints', {
  filter:'_selector',
  selector: {
    type: 'complaint',
    assignee: this.session.name
  }
})

• $pouch.push(localDatabase, remoteDatabase): Like localdb.replicate.to(remotedb, {live: true, retry: true}). Also, if the browser has an active session cookie, it will fetch session data (username, etc) from the remote server.
• $pouch.put/post/remove/get(database, ...): Same as db.put(…)
• $pouch.createUser(name, password): Create a user in the remote database and also start a new session.
• $pouch.useAuth(name, password): Set credentials to use to start a session with the remote server.
• $pouch.resetAuth(): Forgets the credentials, session data and session cookie.

Reactive Properties

• $pouch.loading: Contains an object with synced database names as the keys. The value of each key is true while the initial loading happens. This API is a little bit unreliable at the moment.
• $pouch.hasAuth: true, if VuePouch has credentials
• $pouch.authError: Contains the authentication error, if one occured (eg. when calling useAuth, createUser, etc).
• $pouch.session: Contains information about the current session with the remote database (eg. user name, roles, etc.)
• $pouch.errors: A json object containing errors that occured on databases. The object key is the name of the database, the value is the error.

Non-Reactive Properties

• vm.$databases: the pouchdb instances. shared across all components.

Download Details:

Author: buhrmi

Source Code: https://github.com/buhrmi/vue-pouch

#vuejs #vue #javascript

What is GEEK

Buddha Community

Top Chat Software for Live Streaming & Broadcasting Web & Mobile Apps

Do you Increase your Website Engagment?

I analysed, ranked and reviewed best live video streaming chat APIs and SDKs for your web & mobile app based on client reviews and ratings. portfolio, usecases, cost, secure streaming, live chat features, cost, support, etc.

Turn your viewers into participatients with Live Streaming Chat Solutions. There are lot of Real-time chat apis & SDks Providers have in online market now. You can easily integrte and customize real time chat solutions into your new or existing live video streaming web and iOS & android applications. Below have mentioned best real time chat api & SDk Proivders.

Here are The Most Popular Live Video Streaming Chat APIs & SDKs to be Considered for your Mobile App

1. CONTUS Fly - Real-time Messaging Platform for Live Streaming Apps & Webs

CONTUS Fly is one of the leading real time messaging software providers in the market for a decade. Their messaging platforms are completely customizable since they provide Chat APIs and SDKs to integrate real time chat feasibility on your live streaming applications irrespective of audience base. Engage your audience like a live concert, stadium like experience through digitally. Create channels for every live streaming event, sports or anything that would create buzz. Enable audience to interact with each other over voice, video chats and real-time text chats with engaging emojis. CONTUS Fly enables users to add emojis and stickers to captivate each audience and create fun.

Highlight Features of CONTUS Fly Live Video Streaming Platform Includes:

1. Chat for Live Video Streaming
2. Video & Audio Recording
3. Video Calling
4. Drawing whitebord
5. Screen Sharing
6. End to End Encryption

2. Apphitect -Instant chat for Live Streaming Platforms

To make every live streaming and broadcasting videos more engaging and entertaining, Apphitect’s instant messaging comes with exciting Instant messaging chat APIs to add chat into streaming applications. Apphitect is built with multiple real time communication features like video chat, voice chat and real-time chat to your streaming apps. Their solution surprisingly has a wide range of features to communicate, engage and increase subscription benefits.

Highlight Features of Apphitect Live Insterative Broadcasting Software Includes:

1. Live Video Streaming Chat
2. Cross Platform Support
3. Audio & Video Recording
4. Live Video Calling
5. Emoji & Stickers

3. MirrorFly - Enterprise Real Time Chat for Streaming Websites

One of the enterprise-grade real-time chat solutions built to create virtual chat experience for live streaming events and websites for big brands and startups. Irrespective of audience base, category, MirrorFly provides customizable real time chat APIs to add virtual communication mediums on live streaming and broadcasting applications. Their solution comes with absolute moderation tools and open channels to talk and listen with your audience. MirrorFly’s server infrastructure has the potential to handle concurrent messages and users and to achieve maximum sales conversion.

Highlight Features of MirrorFly Live Streaming Chat API Includes:

1. Face to Face Video Calling
2. Live Interactive Broadcasting
3. Call Recording
4. Digital Whiteboard
5. Group Video Calling

4. Applozic - Real-time Chat Plugin for Live Broadcasting & Video Streaming apps

When it comes to building a live streaming chat app software that covers the entire platforms and demand All-in-One package (features, Customization to any extent) with a one-time payment for lifetime performance, then undoubtedly Contus Fly makes the right choice to partner with. The company offers live broadcasting SDK for Android/iOS and chat APIs for customization.

Highlight Features of Applozic Chat Live Streaming Platform Includes:

1. Real time Communication
2. Cross Platform Support
3. Live Audio Broadcasting
4. Push Notifications
5. Secure Image Sharing

5. Sendbird - Top Real time Chat for Live Video Streams

Being a leading real time chat platform provider in the market, Sendbird has its own hallmark of communication features to the world’s most prominent live streaming applications. Their real time chat solution enables broadcasting and streaming platform’ owners to create a physical equivalent digital chat experience for the audience during any live event streaming to interact, collaborate and cheer together within the same streaming screen. By creating open channels and groups, you can enable the audience to interact with each other during any streaming, engage them with polls, stickers, multiple communication channels and more.

Highlight Features of Sendbird Live Streaming Chat API Includes:

1. Chat for Streaming website
2. Messaging Data
3. Multi Platforms
4. Push Notifications
5. End to End Encryption

6. Agora - Interactive Live Chat for Live Video Streaming

Agora, a deep integratable API available in the market to deliver live interactive streaming experience for workplace, enterprises, gaming, retail, telehealth and social live streaming websites. With easy-to-embed SDKs, Agora empowers businesses to add HD and low latency video and voice chat features into any streaming platforms and channels. Their easy-to-embed real time chat features encourage higher levels of user engagement and opportunity to drive more audience.

7. Enablex - A Redefined Communication APIs for In-app Chat

Their smart and secure chat APIs deliver real-time chat feasibility for live and on-demand video streaming websites. The real time chat features provides users to communicate and engage within the same streaming platform irrespective of interaction medium and audience count. Enablex offers platform-as-a-service communication solutions for real time messaging integration with APIs hosting possibility on public, private and cloud deployment. Their APIs are enriched with multiple communication features and engagement tools like live-polls, stickers and more.

8. Pubnub - In-app Chat Platforms for Live Event Streaming Websites

In order to increase user engagement with live and remote audiences, Pubnub offers real time messaging chat functionality with interactive features to drive event-based engagement with mass chat. Their in-app chat feature enhances live programs, event streaming and blogging content with live polling, multiple chats and more. It also enables live streaming websites to build community, channels and super groups during live streaming to bring the entire audience base to one place.

9. Vonage - Communication APIs for In-app Messagings

Vonage is a prime provider of communication APIs for major industrial sectors and enterprise workplaces. With its API, businesses such as live streaming applications can integrate in-app messaging features into any streaming platforms on Android, iOS and Web to empower user engagement. Their APIs are powered with scalable infrastructure and provide multiple communication mediums such as in-app voice, video and chat proactively engaging the audience.

10. Firekast - Live Chat Widget for Video Streaming Player

Firekast provides a customizable live chat widget with HTML code for streaming players to enable chat within any streaming or on-demand videos. The chat widget gives the ability for brands and content owners to make the audience to interact with each other for better engagement and proactivity during streaming. The Firekast Live chat comes with moderator tools that will allow administrators to delete or ban abusive content and users from the channel or groups. Firekast’s live chat comes with a private chat widget to create public or private chat rooms to make effective collaboration and discussions.
 

Conclusion
And this is all the real time chat providers in the market to implement chat functionality in any live streaming or broadcasting platforms. More than delivering entertaining live content, creating a massive engagement and buzz for every live event is the smarter way to turn every audience into a protiable subscriber. Picking up the right software provider is more important than just handling the integration process.

#live #live-streaming-solutions #live-streaming-chat-api #live-streaming-chat-sdk #chat-api-for-live-broadcasting

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Live and reactive PouchDB bindings for Vuejs

vue-pouch

Reactive Vue bindings for PouchDB using pouchdb-live-find.

Examples

Todo App with real-time 4-way data syncing: DOM <-> Vue <-> IndexedDB <-> CouchDB

Try this example here: https://buhrmi.github.io/vue-pouch/

<template>
  <div class="todos">
    <input v-model="message" placeholder="New Todo">
    <button @click="$pouch.post('todos', {message: message});message=''">Save Todo</button>
    <div v-for="todo in todos">
      <input v-model="todo.message" @change="$pouch.put('todos', todo)">
      <button @click="$pouch.remove('todos', todo)">Remove</button>
    </div>
  </div>
</template>

<script>
  export default {
    // VuePouch adds a `pouch` config option to all components.
    pouch: {
      // The simplest usage. queries all documents from the "todos" pouch database and assigns them to the "todos" vue property.
      todos: {/*empty selector*/}
    },
    created: function() {
      // Send all documents to the remote database, and stream changes in real-time
      this.$pouch.sync('todos', 'http://localhost:5984/todos');
    }
  }
</script>

Reactive & Live Selectors (Mango Queries)

<template>
  Show people that are <input v-model="age"> years old.
  <div v-for="person in people">
    {{ person.name }}
  </div>
</template>

<script>
  export default {
    data () {
      return {
        resultsPerPage: 25,
        currentPage: 1
      }
    },
    // Use the pouch property to configure the component to (reactively) read data from pouchdb.
    pouch: {
      // The function returns a Mango-like selector that is run against the `people` database.
      // The result of the query is assigned to the `people` property.
      people: function() {
        if (!this.age) return;
        return {age: this.age, type: "person"}
      },
      // You can also specify the database dynamically (local or remote), as well as limits, skip and sort order:
      peopleInOtherDatabase: function() {
        return {
          database: this.selectedDatabase, // you can pass a database string or a pouchdb instance
          selector: {type: "person"},
          sort: [{name: "asc"}],
          limit: this.resultsPerPage,
          skip: this.resultsPerPage * (this.currentPage - 1)
        }
      }
    }
  })
</script>

Single documents

If you only want to sync a single document that matches a selector, use first: true:

module.exports = {
  // ...
  pouch: {  
    projectDetails: function() {
      return {
        database: 'mydatabase',
        selector: {_id: this.selectedProjectId},
        first: true
      }
    }
  }
  // ...
}

Installation

Install via npm:

npm install --save vue-pouch

The only requirement is that pouchdb-live-find is installed:

import PouchDB from 'pouchdb-browser'
PouchDB.plugin(require('pouchdb-find'));
PouchDB.plugin(require('pouchdb-live-find'));

If you want to use remote databases (CouchDB, Cloudant, etc.), you should also install the authentication plugin:

PouchDB.plugin(require('pouchdb-authentication'));

Then, plug VuePouch into Vue:

Vue.use(require('vue-pouch'), {
  pouch: PouchDB,    // optional if `PouchDB` is available on the global object
  defaultDB:         // the database to use if none is specified in the pouch setting of the vue component
})

API

$pouch

$pouch is made available on all vue instances and has some helper functions. Note that this API is not stable and will probably change.

Methods

• $pouch.sync(localDatabase, remoteDatabase): Basically the same as PouchDB.sync(local, remote, {live: true, retry: true}). Also, if the browser has an active session cookie, it will fetch session data (username, etc) from the remote server. BONUS: If your remote database runs CouchDB 2.0 or higher, you can also specify a Mango Selector that is used to filter documents coming from the remote server.

For example

$pouch.sync('complaints', 'https:/42.233.1.44/complaints', {
  filter:'_selector',
  selector: {
    type: 'complaint',
    assignee: this.session.name
  }
})

• $pouch.push(localDatabase, remoteDatabase): Like localdb.replicate.to(remotedb, {live: true, retry: true}). Also, if the browser has an active session cookie, it will fetch session data (username, etc) from the remote server.
• $pouch.put/post/remove/get(database, ...): Same as db.put(…)
• $pouch.createUser(name, password): Create a user in the remote database and also start a new session.
• $pouch.useAuth(name, password): Set credentials to use to start a session with the remote server.
• $pouch.resetAuth(): Forgets the credentials, session data and session cookie.

Reactive Properties

• $pouch.loading: Contains an object with synced database names as the keys. The value of each key is true while the initial loading happens. This API is a little bit unreliable at the moment.
• $pouch.hasAuth: true, if VuePouch has credentials
• $pouch.authError: Contains the authentication error, if one occured (eg. when calling useAuth, createUser, etc).
• $pouch.session: Contains information about the current session with the remote database (eg. user name, roles, etc.)
• $pouch.errors: A json object containing errors that occured on databases. The object key is the name of the database, the value is the error.

Non-Reactive Properties

• vm.$databases: the pouchdb instances. shared across all components.

Download Details:

Author: buhrmi

Source Code: https://github.com/buhrmi/vue-pouch

#vuejs #vue #javascript

Building Reactive Scalable Systems

Building a Reactive System is all about the balance between consistency and availability and the consequences of picking one over the other. This article mainly focuses on consistency and availability and how they impact the scalability of a system.

What are Scalability, Consistency, and Availability?

A system is considered scalable if it can meet the increase in demand while remaining responsive.

A system is considered consistent if all the nodes show the same data at the same time.

A system is considered available if it remains responsive despite any failures.

How Does the Scalability of a System Differ From the Performance of the System?

Scalability and performance are related but different concepts and we need to understand what the difference is.

Scalability is the number of requests a system can handle at a time, i.e. load. It’s about optimizing the ability to handle the load, which means improving how many requests a system can handle at a time. Performance on the other hand is the time system takes to complete a single request, i.e. latency. It’s about optimizing the response time, which means improving how quickly a system can handle a single request.

Performance has a limit on reducing the response time, and we will eventually reach that limit. Whereas, scalability has no theoretical limit. We may be restricted by the implementation, but in a perfectly scalable system, we could scale forever.

So when we build Reactive Micro-services we tend to focus on improving scalability than improving performance.

How Can We Measure Scalability and Performance of a System?

Measurement like requests-per-second measures both. This makes it a valuable metric because we can use it to see whether we have improved our scalability or our performance. But it also means that it is somewhat restrictive in the sense that if it improves we can’t tell which one changed. So if we want to know where that improvement came from then we have to track scalability and performance individually.

How Can We Explain Consistency in Distributed Systems?

Distributed systems are systems that are separated by space. This means the system could be deployed across multiple data centers or within the same data center, or just deployed to different hardware or the same hardware.

Even if it’s deployed to the same hardware, a distributed system is one where information has to be transferred between different parts of that system, and when that information is transferred it’s crossing some sort of space. It could be going over a local network, or it could be writing to a disk, or it could be writing to a database.

Information cannot be transferred instantaneously, it takes some time. Granted that time could be very small but there is an amount of time that elapses during the transfer of information. Within that time duration when the transfer of the information takes place, the state of the original sender may change.

The key here is to recognize that when we are dealing with a distributed system, we are always dealing with stale data. The reality_ is eventually consistent._

What Is Eventual Consistency?

When a system stops receiving updates at least for some time, we can guarantee that all parts of the system will eventually converge on the same state. Thus in this way, we can reach that level of consistency.

Common source control tools (Git, Subversion, etc) operate on an eventually consistent model. They rely on a later merge operation to bring things back into alignment. That’s how modern source control tools achieve consistency and it’s all an eventually consistent system.

Traditional monolithic architectures are usually based around strong consistency they use a strongly consistent database like a SQL database.

What Is Strong Consistency?

When all members of a system agree on the state, before it becomes available, then we reach the level of strong consistency.

We can achieve strong consistency by introducing mechanisms like locks. Distributed system problem occurs when we have multiple things which are responsible for the same piece of data. As long as only one thing is responsible for that data, as long as we only have one instance of the lock, it’s not a distributed system problem anymore. Thus in this way, we can resolve the distributed system problem by using a non distributed resource(lock).

But when we introduce a lock, it introduces overhead in the form of contention. That overhead has consequences to our ability to be elastic, to be resilient, and it has other consequences as well.

#scalability #reactive architecture #cap theorem #reactive systems #reactive microservices #reactive

7 Scripts To Develop Live Video Streaming Apps - Streambiz

7 Scripts That Will Help You Build A Live Video Streaming Application. Live Video Streaming App can Be for Live Events or Individuals to Use it for Fun and also Earn Money Online.

StreamBiz is one of the most exclusive offers for you who are looking for the best live stream video app builder. Are you looking for a video host app for your company, educator Institute, or events? Download Now. Click here! StreamBiz is a unique app presented by BSETEC to fulfill your requirement for any time of video streaming creative business plan online. Maybe you are the best marketer in your company who has got the opportunity to present your brand more lively on social media apps. However, if you want to excel now in these times with a personal video app for your business idea, then you should start without any worry. Take the free live streaming script app called StreamBiz available on Google playstore or the Apple store. Get the latest features and technology support for free! 

Now Here are the 7 Best Scripts for Live Video Streaming Apps 

1. StreamBiz Live Video Script

Build a Bigo live clone or a periscope clone, all you need is Streambiz free video app script to allow the creator to build an exclusive unique video app that can be used for a particular crowd or can be used by anyone to present online. The script is available on Google Play or Apple Store easily without any technology or sign-up interaction. Use this in media, technology, education, sports, corporate, or the government. The app itself is a proud technology provided by one of the excellent and leading technology companies BSETEC. 

2. Zoom Clone Script

Live video streaming script apps have become more important than any other application, Zoom app is the most suitable for all just like StreamBiz high technology suite for video app development. Zoom video app, mostly used for live conferences, the scream script is now available on our website. It has some amazing features that you can apply while creating a video stream app for your company or business. The feature includes a user can start a video session on zoom and share with others, also anyone can have a personal chat room, group chat, recording of the meeting, and set an extra miles sample for others in the video app script clone business. 

3. Periscope Clone Script Live Streaming App

Periscope is a broadcast live video sharing platform for the targeted audience who are logged in already and for everyone who wants to join and watch hosted videos on periscope. Also, it allows streaming a live moment that can be shared with anyone on any social media app. Periscope is a good app for speakers and educators, business professionals who cover a huge audience at one moment can easily use this, and similarly if you want to clone this app, we have a free live streaming script for video making apps. 

Benefits of PERISCOPE CLONE SCRIPT FOR ALL INDUSTRIES – BSETEC
 

4. Live TV Stream Script

Interestingly this app script is famous and empowers the user to create a live stream video app. It Is compatible with any desktop and mobile app. The user can easily watch the stream and share it with others on social media. One can have a full panel control to edit, filter, and do lots more. The script can be cloned easily with a live stream script. It has transaction options for all the viewers. And this helps the businessman to earn money through the paid version of the video stream for various events. 

5. Castasy Video Streaming App 

The App is famous and can be used for multiple purposes, we can clone this type of template, and yes. It is very easy and convenient. Anyone can use cactasy so bring a huge new set of video streaming apps in the market with the best features that can be very unique and different for everyone. To clone this app contact our experts now BSETEC

6. Gentle Ninja Meerkat Turnkey App Script

This app script is making a special noise. Yet very interesting, it can be cloned with our free open source code online. The app has features that allow the user to log in via social media, live re-streaming, scheduling, follow up, get the entire management admin panel, and much more. One can just start using our free live streaming script and build the most exclusive video app in less time. 

How Live Streaming has Helped Small Businesses to Grow?

7. Bigo Live App 

The Bigo live app can be cloned easily with the help of a Streambiz, a very useful and smart option that allows the end-user to log in, like, follow and share. Play interesting games and get the best options to earn money online. This is way different than other applications like zoom or periscope. Contact our experts for more details. 

Live Video Streaming App can Be for Live Events or Individuals to Use it for Fun and also Earn Money Online.

Conclusion:

Ask us all about live video streaming app cloning, free advice with 100% technical support, free download at https://www.bsetec.com/periscope-clone/ 

 

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