This slides are for meetup event from below link.
https://www.meetup.com/ja-JP/CodeChrysalis/events/245248864/
This mainly explains how backend program works in general and I implemented sample project with express and sequelizejs that are nodejs modules and PostgreSQL for a database. You can see sample project (learning material of backend with JavaScript) from below github link.
Repository for this slides:
https://github.com/duyoji/creating_api_with_express_and_postgresql
SambaStatus a "Do it yourself" module for NethServerNethServer
Develop from scratch a module for to see logged user and open file in NethServer used like Domain Controller. There is not a similar function into NethServer then I wrote it
SambaStatus a "Do it yourself" module for NethServerNethServer
Develop from scratch a module for to see logged user and open file in NethServer used like Domain Controller. There is not a similar function into NethServer then I wrote it
JS Fest 2019/Autumn. Виталий Кухар. Сравнение кластеризации HTTP, TCP и UDP н...JSFestUA
В этом докладе, я хочу сравнить кластеризацию HTTP, TCP, UDP на процессах и потоках в NodeJS. Оценить производительность и использование ресурсов при разных подходах.
Presentation on MongoDB and Node.JS. We describe how to do basic CRUD operations (insert, remove, update, find) how to aggregate using node.js. We also discuss a bit of Meteor, MEAN Stack and other ODMs and projects on Javascript and MongoDB
Ten practical ways to improve front-end performanceAndrew Rota
Conference talk presented at PHP South Coast 2017. Ten concrete ways to improve web performance, split between quick tactical wins and longer-term overarching strategies.
JS Fest 2019/Autumn. Виталий Кухар. Сравнение кластеризации HTTP, TCP и UDP н...JSFestUA
В этом докладе, я хочу сравнить кластеризацию HTTP, TCP, UDP на процессах и потоках в NodeJS. Оценить производительность и использование ресурсов при разных подходах.
Presentation on MongoDB and Node.JS. We describe how to do basic CRUD operations (insert, remove, update, find) how to aggregate using node.js. We also discuss a bit of Meteor, MEAN Stack and other ODMs and projects on Javascript and MongoDB
Ten practical ways to improve front-end performanceAndrew Rota
Conference talk presented at PHP South Coast 2017. Ten concrete ways to improve web performance, split between quick tactical wins and longer-term overarching strategies.
Beyond Wordcount with spark datasets (and scalaing) - Nide PDX Jan 2018Holden Karau
Apache Spark is one of the most popular big data systems, but once the shiny finish starts to wear off you can find yourself wondering if you've accidentally deployed a Ford Pinto into production. This talk will look at the challenges that come with scaling Spark jobs. Also, the talk will explore Spark's new(ish) Dataset/DataFrame API, as well as how it’s evolving in Spark 2.3 with improved Python support.
If you're already a Spark user, come to find out why it’s not all your fault. If you aren't already a Spark user, come to find out how to save yourself from some of the pitfalls once you move beyond the example code.
Check out Holden's newest book, High Performance Spark, for more information!
From https://niketechtalksjan2018.splashthat.com/
Xephon K is a time series database using Cassandra as main backend. We talk about how to model time series data in Cassandra and compare its throughput with InfluxDB and KairosDB
Benchx: An XQuery benchmarking web application Andy Bunce
A system to record query performance of XQuery statements running on the BaseX http:basex.org XML database. It uses Angular on the client side and RESTXQ on the server.
Intro - End to end ML with Kubeflow @ SignalConf 2018Holden Karau
There are many great tools for training machine learning tools, ranging from sci-kit to Apache Spark, and tensorflow. However many of these systems largely leave open the question how to use our models outside of the batch world (like in a reactive application). Different options exist for persisting the results and using them for live training, and we will explore the trade-offs of the different formats and their corresponding serving/prediction layers.
4-year chronicles of ALLSTOCKER (a trading platform for used construction equipment and machinery). We describe how the system has evolved incrementally using Pharo smalltalk.
E-commerce Application Development Company.pdfHornet Dynamics
Your business can reach new heights with our assistance as we design solutions that are specifically appropriate for your goals and vision. Our eCommerce application solutions can digitally coordinate all retail operations processes to meet the demands of the marketplace while maintaining business continuity.
Launch Your Streaming Platforms in MinutesRoshan Dwivedi
The claim of launching a streaming platform in minutes might be a bit of an exaggeration, but there are services that can significantly streamline the process. Here's a breakdown:
Pros of Speedy Streaming Platform Launch Services:
No coding required: These services often use drag-and-drop interfaces or pre-built templates, eliminating the need for programming knowledge.
Faster setup: Compared to building from scratch, these platforms can get you up and running much quicker.
All-in-one solutions: Many services offer features like content management systems (CMS), video players, and monetization tools, reducing the need for multiple integrations.
Things to Consider:
Limited customization: These platforms may offer less flexibility in design and functionality compared to custom-built solutions.
Scalability: As your audience grows, you might need to upgrade to a more robust platform or encounter limitations with the "quick launch" option.
Features: Carefully evaluate which features are included and if they meet your specific needs (e.g., live streaming, subscription options).
Examples of Services for Launching Streaming Platforms:
Muvi [muvi com]
Uscreen [usencreen tv]
Alternatives to Consider:
Existing Streaming platforms: Platforms like YouTube or Twitch might be suitable for basic streaming needs, though monetization options might be limited.
Custom Development: While more time-consuming, custom development offers the most control and flexibility for your platform.
Overall, launching a streaming platform in minutes might not be entirely realistic, but these services can significantly speed up the process compared to building from scratch. Carefully consider your needs and budget when choosing the best option for you.
Custom Healthcare Software for Managing Chronic Conditions and Remote Patient...Mind IT Systems
Healthcare providers often struggle with the complexities of chronic conditions and remote patient monitoring, as each patient requires personalized care and ongoing monitoring. Off-the-shelf solutions may not meet these diverse needs, leading to inefficiencies and gaps in care. It’s here, custom healthcare software offers a tailored solution, ensuring improved care and effectiveness.
Graspan: A Big Data System for Big Code AnalysisAftab Hussain
We built a disk-based parallel graph system, Graspan, that uses a novel edge-pair centric computation model to compute dynamic transitive closures on very large program graphs.
We implement context-sensitive pointer/alias and dataflow analyses on Graspan. An evaluation of these analyses on large codebases such as Linux shows that their Graspan implementations scale to millions of lines of code and are much simpler than their original implementations.
These analyses were used to augment the existing checkers; these augmented checkers found 132 new NULL pointer bugs and 1308 unnecessary NULL tests in Linux 4.4.0-rc5, PostgreSQL 8.3.9, and Apache httpd 2.2.18.
- Accepted in ASPLOS ‘17, Xi’an, China.
- Featured in the tutorial, Systemized Program Analyses: A Big Data Perspective on Static Analysis Scalability, ASPLOS ‘17.
- Invited for presentation at SoCal PLS ‘16.
- Invited for poster presentation at PLDI SRC ‘16.
Introducing Crescat - Event Management Software for Venues, Festivals and Eve...Crescat
Crescat is industry-trusted event management software, built by event professionals for event professionals. Founded in 2017, we have three key products tailored for the live event industry.
Crescat Event for concert promoters and event agencies. Crescat Venue for music venues, conference centers, wedding venues, concert halls and more. And Crescat Festival for festivals, conferences and complex events.
With a wide range of popular features such as event scheduling, shift management, volunteer and crew coordination, artist booking and much more, Crescat is designed for customisation and ease-of-use.
Over 125,000 events have been planned in Crescat and with hundreds of customers of all shapes and sizes, from boutique event agencies through to international concert promoters, Crescat is rigged for success. What's more, we highly value feedback from our users and we are constantly improving our software with updates, new features and improvements.
If you plan events, run a venue or produce festivals and you're looking for ways to make your life easier, then we have a solution for you. Try our software for free or schedule a no-obligation demo with one of our product specialists today at crescat.io
Code reviews are vital for ensuring good code quality. They serve as one of our last lines of defense against bugs and subpar code reaching production.
Yet, they often turn into annoying tasks riddled with frustration, hostility, unclear feedback and lack of standards. How can we improve this crucial process?
In this session we will cover:
- The Art of Effective Code Reviews
- Streamlining the Review Process
- Elevating Reviews with Automated Tools
By the end of this presentation, you'll have the knowledge on how to organize and improve your code review proces
Top Features to Include in Your Winzo Clone App for Business Growth (4).pptxrickgrimesss22
Discover the essential features to incorporate in your Winzo clone app to boost business growth, enhance user engagement, and drive revenue. Learn how to create a compelling gaming experience that stands out in the competitive market.
AI Pilot Review: The World’s First Virtual Assistant Marketing SuiteGoogle
AI Pilot Review: The World’s First Virtual Assistant Marketing Suite
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-pilot-review/
AI Pilot Review: Key Features
✅Deploy AI expert bots in Any Niche With Just A Click
✅With one keyword, generate complete funnels, websites, landing pages, and more.
✅More than 85 AI features are included in the AI pilot.
✅No setup or configuration; use your voice (like Siri) to do whatever you want.
✅You Can Use AI Pilot To Create your version of AI Pilot And Charge People For It…
✅ZERO Manual Work With AI Pilot. Never write, Design, Or Code Again.
✅ZERO Limits On Features Or Usages
✅Use Our AI-powered Traffic To Get Hundreds Of Customers
✅No Complicated Setup: Get Up And Running In 2 Minutes
✅99.99% Up-Time Guaranteed
✅30 Days Money-Back Guarantee
✅ZERO Upfront Cost
See My Other Reviews Article:
(1) TubeTrivia AI Review: https://sumonreview.com/tubetrivia-ai-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
Software Engineering, Software Consulting, Tech Lead, Spring Boot, Spring Cloud, Spring Core, Spring JDBC, Spring Transaction, Spring MVC, OpenShift Cloud Platform, Kafka, REST, SOAP, LLD & HLD.
Navigating the Metaverse: A Journey into Virtual Evolution"Donna Lenk
Join us for an exploration of the Metaverse's evolution, where innovation meets imagination. Discover new dimensions of virtual events, engage with thought-provoking discussions, and witness the transformative power of digital realms."
OpenMetadata Community Meeting - 5th June 2024OpenMetadata
The OpenMetadata Community Meeting was held on June 5th, 2024. In this meeting, we discussed about the data quality capabilities that are integrated with the Incident Manager, providing a complete solution to handle your data observability needs. Watch the end-to-end demo of the data quality features.
* How to run your own data quality framework
* What is the performance impact of running data quality frameworks
* How to run the test cases in your own ETL pipelines
* How the Incident Manager is integrated
* Get notified with alerts when test cases fail
Watch the meeting recording here - https://www.youtube.com/watch?v=UbNOje0kf6E
AI Genie Review: World’s First Open AI WordPress Website CreatorGoogle
AI Genie Review: World’s First Open AI WordPress Website Creator
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-genie-review
AI Genie Review: Key Features
✅Creates Limitless Real-Time Unique Content, auto-publishing Posts, Pages & Images directly from Chat GPT & Open AI on WordPress in any Niche
✅First & Only Google Bard Approved Software That Publishes 100% Original, SEO Friendly Content using Open AI
✅Publish Automated Posts and Pages using AI Genie directly on Your website
✅50 DFY Websites Included Without Adding Any Images, Content Or Doing Anything Yourself
✅Integrated Chat GPT Bot gives Instant Answers on Your Website to Visitors
✅Just Enter the title, and your Content for Pages and Posts will be ready on your website
✅Automatically insert visually appealing images into posts based on keywords and titles.
✅Choose the temperature of the content and control its randomness.
✅Control the length of the content to be generated.
✅Never Worry About Paying Huge Money Monthly To Top Content Creation Platforms
✅100% Easy-to-Use, Newbie-Friendly Technology
✅30-Days Money-Back Guarantee
See My Other Reviews Article:
(1) TubeTrivia AI Review: https://sumonreview.com/tubetrivia-ai-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
#AIGenieApp #AIGenieBonus #AIGenieBonuses #AIGenieDemo #AIGenieDownload #AIGenieLegit #AIGenieLiveDemo #AIGenieOTO #AIGeniePreview #AIGenieReview #AIGenieReviewandBonus #AIGenieScamorLegit #AIGenieSoftware #AIGenieUpgrades #AIGenieUpsells #HowDoesAlGenie #HowtoBuyAIGenie #HowtoMakeMoneywithAIGenie #MakeMoneyOnline #MakeMoneywithAIGenie
Quarkus Hidden and Forbidden ExtensionsMax Andersen
Quarkus has a vast extension ecosystem and is known for its subsonic and subatomic feature set. Some of these features are not as well known, and some extensions are less talked about, but that does not make them less interesting - quite the opposite.
Come join this talk to see some tips and tricks for using Quarkus and some of the lesser known features, extensions and development techniques.
Artificia Intellicence and XPath Extension FunctionsOctavian Nadolu
The purpose of this presentation is to provide an overview of how you can use AI from XSLT, XQuery, Schematron, or XML Refactoring operations, the potential benefits of using AI, and some of the challenges we face.
2. Workshop’s repository: https://goo.gl/cjR7EL
About me
● Tsuyoshi Maeda
● A student of Code Chrysalis.
(Freelance engineer)
● I started programming at 21
years. (Junior university student.)
● What I like
○ Playing futsal (soccer)
○ Tsukemen (dipping noodles)
○ Watching video games on youtube
and Niconico.
3. Workshop’s repository: https://goo.gl/cjR7EL
After this meetup
● You will
○ Understand back-end programming with JavaScript.
○ Be able to set up back-end environment.
■ DB
■ Web Server
○ Create API server.
○ Be able to become a full-stack engineer. (If you are already familiar
with front-end JavaScript.)
4. Workshop’s repository: https://goo.gl/cjR7EL
Outline
● Advantages of JavaScript as a backend.
● Database with JavaScript
● Web server with JavaScript
● Create a API server together. (Workshop)
Today’s Repository: https://goo.gl/cjR7EL
5. Workshop’s repository: https://goo.gl/cjR7EL
Advantages of JavaScript as a backend.
● Don’t have to switch your brain between Front-end and Back-end.
● For web front engineers, They can start Back-end programming without
learning new programming language.
● Shortest way to become a full stack engineer. (Learning only one
programming language.)
6. Workshop’s repository: https://goo.gl/cjR7EL
Disadvantages of JavaScript as a backend.
● Many knowledge of back-end JavaScript are not matured compared to
other server side language.
○ NodeJS: 2009.
■ JavaScript was born on 1995 but it is not for server-side.
■ JavaScript for browser cannot handle server resources.)
○ Ruby on Rails: 2004. (Ruby: 1995)
○ PHP: 1995
■ Ruby and PHP are for server-side. (Then can handle server resources.)
● Tend to grow faster and come out new information.
○ It is hard to follow new knowledge.
7. Workshop’s repository: https://goo.gl/cjR7EL
Database with JavaScript
● Driver/Adapter
○ “pg “ for PostgreSQL
○ “mysql” for MySQL
○ “sqlite3” for SQLite3
● ORM (Object-relational mapping)
○ Sequelize (Most numerous of downloads and stars on Github.)
○ Bookshelf with knex (Second largest numerous of downloads and stars.)
○ https://npmcompare.com/compare/bookshelf,knex,objection,orm,sequelize
10. Workshop’s repository: https://goo.gl/cjR7EL
ORM
● Instead of using raw SQL, ORM offers some methods that translate into
SQL.
○ e.g.) Code snippets of Sequelize to manipulate Todos table.
■ Todo.findAll({...}) => SELECT ...
■ Todo.create({...}) => INSERT ..., UPDATE ...
■ Todo.findAll({include: [{model: ‘User’}...]}) => Join
■ and so on …
● You don’t have to care about each dialect of DB.
● Just change adapter when you want to change DB.
11. Workshop’s repository: https://goo.gl/cjR7EL
Web server with JavaScript
● Express (Most popular node http framework and we will use this for
today’s workshop.)
○ Middlewares
○ Router
● Other JavaScript web frameworks
○ Socket.io
○ Hapi.js
○ Sails.js
12. Workshop’s repository: https://goo.gl/cjR7EL
Middleware
● Middleware converts request to what you can handle easily.
○ Check if user is logged in or not.
○ Log HTTP requests
○ Parse request body of Json to object of JavaScript.
● The Express middleware modules maintained by the Expressjs team.
○ https://expressjs.com/en/resources/middleware.html
13. Workshop’s repository: https://goo.gl/cjR7EL
Web Server
Middleware
DBClient
Middleware
process 1
process 2
...
process n-1
router
Connect to DB if a process has a code
that communicate with DB.
Request /api/data
Response /api/data
14. Workshop’s repository: https://goo.gl/cjR7EL
Middleware
● Example code of middleware
// req: Includes req object and can modify req object
// res: Includes res object
// next: callback function to call next middleware or router.
function(req, res, next) {
req.body = …; // You can add any properties
res.statusCode = …;
// If you want to stop this process, do not call `next` callback.
if( condition ) return false;
next();
}
15. Workshop’s repository: https://goo.gl/cjR7EL
● Router handle each request and direct the request to proper process.
○ GET /path/to/something
● You can map one URL to each HTTP methods.
○ “GET” for getting data.
○ “POST” for creating new data.
○ “PUT” for updating stored data.
○ “DELETE” for deleting stored data.
● CRUD
○ Create, Read, Update, Delete
Router
16. Workshop’s repository: https://goo.gl/cjR7EL
Web Server
Router
DBClient
Connect to DB if a process(controller)
has a code that communicate with DB.
Router
GET
POST
PUT
DELETE
Controller
fetchData
createData
updateData
deleteData
Request /api/data
Response /api/data
Mapping request to controller/handler by
HTTP methods.
18. Workshop’s repository: https://goo.gl/cjR7EL
Web Server
Middleware and Router
DB
Client
Router
GET
POST
PUT
DELETE
Controller
fetchData
createData
updateData
deleteData
Request:
GET /api/data
Response:
GET /api/data
Middleware
process 1
process 2
...
19. Workshop’s repository: https://goo.gl/cjR7EL
DB
Web Server
Client
Router
GET
POST
PUT
DELETE
Controller
fetchData
createDat
a
updateDat
a
deleteDat
a
Middleware
process 1
process 2
...
pg
mysql
sqlite3
ORM
ORM, Middleware and Router
20. Workshop’s repository: https://goo.gl/cjR7EL
● DB
○ What is a driver/adapter?
○ What is a ORM?
● Web server
○ What is a middleware?
○ What is a router?
○ When user request to server, how does the data flow works?
Recap
22. Workshop’s repository: https://goo.gl/cjR7EL
My contacts
● Twitter: @duyoji
● Github: duyoji
● Blog
○ http://duyoji.hatenablog.com/ (Written in Japanese and not only Tech blog.)
○ http://tsuyoshi-maeda.hatenablog.com/ (Written in English and only Tech blog.)