Wolltest du schon immer die Vorteile und Ideen von Scala in deinen Java oder Kotlin Projekten nutzen? Dann ist Vavr (ehemals Javaslang) genau die richtige Bibliothek für dich.
Anhand echter Projektbeispiele schauen wir uns den Nutzen an, den Vavr mit seinen syntaktischen Erweiterungen und Features bei der täglichen Arbeit bietet. Wir schauen uns Value Types, echte funktionale Datentypen an und werden lernen, wie wir Exceptions sinnvoller behandeln können. Alles für besser wartbaren und sauberen Code!
Vavr bietet die Möglichkeit, die Vorteile objekt-funktionaler Programmierung zu nutzen, ohne Java den Rücken kehren zu müssen.
Poche chiacchiere e tanto codice per cercare rendere la nostra vita di
sviluppatori più divertente.
Parleremo di JAX-RS, le annotazioni, l'MVC che mette a disposizione e
l'integrazione di Jersey con Guice.
Useremo AOP per gestire log, transazioni e con l'aiuto di Infinispan
limiteremo le chamate concorrenti sul nostro cluster.
Poche chiacchiere e tanto codice per cercare rendere la nostra vita di
sviluppatori più divertente.
Parleremo di JAX-RS, le annotazioni, l'MVC che mette a disposizione e
l'integrazione di Jersey con Guice.
Useremo AOP per gestire log, transazioni e con l'aiuto di Infinispan
limiteremo le chamate concorrenti sul nostro cluster.
자프링(자바 + 스프링) 외길 12년차 서버 개발자가 코프링(코틀린 + 스프링)을 만난 후 코틀린의 특징과 스프링의 코틀린 지원을 알아가며 코프링 월드에서 살아남은 이야기…
코드 저장소: https://github.com/arawn/kotlin-support-in-spring
The process of creating HDTR images from the photographic shot to the processing via a Photoshop JS script explained.
This is the slide I used for my talk at the monthly MadridJS meeting held on May, 23rd 2013.
An overview of the inner-workings of OpenJDK - with emphasis on...
- what triggers the just-in-time compiler (JIT)
- types of speculative optimizations performed by the JIT
- aspects of the Java language & ecosystem that make ahead-of-time (AOT) compilation challenging
This talk is a look into some of the surprising performance cases in Java -- with the goal of illustrating a few simple truths about the nature of compilers.
자프링(자바 + 스프링) 외길 12년차 서버 개발자가 코프링(코틀린 + 스프링)을 만난 후 코틀린의 특징과 스프링의 코틀린 지원을 알아가며 코프링 월드에서 살아남은 이야기…
코드 저장소: https://github.com/arawn/kotlin-support-in-spring
The process of creating HDTR images from the photographic shot to the processing via a Photoshop JS script explained.
This is the slide I used for my talk at the monthly MadridJS meeting held on May, 23rd 2013.
An overview of the inner-workings of OpenJDK - with emphasis on...
- what triggers the just-in-time compiler (JIT)
- types of speculative optimizations performed by the JIT
- aspects of the Java language & ecosystem that make ahead-of-time (AOT) compilation challenging
This talk is a look into some of the surprising performance cases in Java -- with the goal of illustrating a few simple truths about the nature of compilers.
Paintfree Object-Document Mapping for MongoDB by Philipp KrennJavaDayUA
This talk is based on heated discussions about the syntax of asserts. Do you like the good old `assertNotEquals(id, c.getId())` or do you prefer something fancier like `assertThat(id, is(not(equalTo(c.getId()))))`? We will take a quick look at the differences between asserts in JUnit, TestNG, Hamcrest, fest, AssertJ, and Spock. This topic is at least as important as Vim vs Emacs and tabs vs spaces!
The impact of moving to the public cloud is severe for organisations and working culture. Here I explore some of the lessons we learned in several projects in the financial industry.
Event Sourcing - You are doing it wrong @ DevoxxDavid Schmitz
"Every microservice get's its own database and then use Kafka" is a typical and naive advise, when reading about eventsourcing. If you approach this architectural style this way, you will probably have a really awful time ahead.
Eventsourcing and CQRS are two very useful and popular patterns when dealing with data and microservices. We often find in our customer's projects, that both have a severe impact on your future options and the maintainability of your architecture. Presentations and articles on both topics are often superficial and do not tackle real world problems like security and compliance requirements.
This combination of half-knowledge and technical confusion leads to many projects that either refactor back to a 'non-eventsourced' architecture or reduce eventsourcing to a message queue.
In this talk, I will summarize our experience while applying eventsourcing and CQRS accros multiple large financial and insurance companies over the last 5 years. We will cover the Good, the Not so Good, and the 'oh my god...all abandon ships!' when doing eventsourcing in the real world...and see how we solved these issues.
10 Tipps für ein absolutes Microservice-DesasterDavid Schmitz
Microservices sind im Wesentlichen ein paar hippe JavaScript-Frameworks und eine schicke Single-Page-App mit AngularJS oder React, oder? Wenn du also absolut sicher sein willst, dass dein nächstes Microservice-Projekt scheitert, dann komm in diesen Vortrag und lerne wie.
Anhand echter Erfahrungen aus mehreren Brownfield- und Greenfield- Projekten zeigt David Schmitz wie du die notwendigen organisatorischen Einflüsse ignorierst; wie du Operations wahnsinnig machst, sowohl durch unreife Technologien als auch durch last-minute Monitoring; wie du auch ohne Continuous Delivery fehlerhafte Software rasch releasen kannst; wie du auch einfachste CRUD-Anwendungen mit hyper-komplexen Architekturen zum Scheitern bringst und vieles mehr.
Wenn du diese Tipps beachtest, wird dein Chef nie wieder auf die Idee kommen, seine IT zu modernisieren und du kannst weiterhin deinen geliebten Monolithen pflegen.
10 tips for failing at microservices @ DevExperience 2018David Schmitz
Microservices are just a bunch hip new framework plus some AngularJS frontend or React, right? So, if you want to make sure that you absolutely and definitely fail at your Microservice project, then watch this talk and learn how.
Using real world experience from multiple green field and brown field projects, I can show you: - how to ignore the mandatory organizational impact - how to focus on the code only without any regard towards ops and testing - continuous deployment is for losers. Real projects use their meat cloud for delivery - jumping onto every new and untested framework is a must - EventSourcing and CQRS are both free lunches. So, you can add complexity without any real need - ...and more
If you mind my tips, then surely you will fail at Microservices and your boss will never again try to move away from your beloved vintage monolith.
Real world serverless - architecture, patterns and lessons learnedDavid Schmitz
Serverless computing is quite the rage today. It enables companies to move to a platform with basically limitless capacity and it allows teams to embrace DevOps right from the start. So, this is literally the silver bullet we have waited for and everybody should embrace it. Right?
Well, it depends…
In this talk we will look at different scenarios and approaches to building and designing complex Serverless applications on AWS beyond your basic “Hello World”. We will cover architectures and patterns that help in adopting Serverless, for example how to design your Serverless landscape without getting lost in event-driven-chaos. Covering the whole development process, we will look at real world problems like testing, debugging, monitoring and securing your Serverless applications. Furthermore, we will use some of the essential tools that make working with AWS Lambda easier, such using Claudia.JS. Finally, we will discuss the drawbacks and misconceptions, like potential vendor lock-in and the illusion of NoOps.
If you find Serverless computing interesting, then this talk will show you how to adapt this architectural style without getting burned too much.
Serverless Computing ist der nächste logische Schritt, um Anwendungen in die Cloud zu bringen. Im Kern von Amazons Serverless Computing Angebots liegt AWS Lambda. AWS Lambda ist unter anderem durch den Sprachassistenten Alexa populär geworden, wird aber in unterschiedlichen Bereichen für innovative Produkte verwendet. Dieser Vortrag stellt Serverless Computing anhand eines Amazon Alexa Skills vor, der das Konferenzprogramm der Devcon 2017 als Sprachassistent anbietet. Wir schauen im Rahmen des Beispiels auf die architekturellen und infrastrukturellen Herausforderungen diese Event-Driven Ansatzes und lernen, wo Serverless Computing sinnvoll ist und wo andere Ansätze besser geeignet sein können. Schliesslich werfen wir noch einen kurzen Blick auf Alternativen zu AWS Lambda und bewerten die Vor- und Nachteile.
10 Tips for failing at microservices - badly (BedCon 2017)David Schmitz
Microservices sind im Wesentlichen ein paar hippe JavaScript Frameworks und eine schicke Single-Page-App mit AngularJS oder React, oder? Wenn du also absolut sicher sein willst, dass dein nächstes Microservice Projekt scheitert, dann komm in diesen Vortrag und lerne wie.
Anhand echter Erfahrung aus mehreren Brownfield und Greenfield Projekten zeige ich:
- wie du die notwendigen organisatorischen Einflüsse ignorierst
- wie du Operations wahnsinnig machst, sowohl durch unreife Technologien als auch durch last-minute Monitoring
- wie du auch ohne Continuous Delivery fehlerhafte Software rasch releasen kannst
- wie du auch einfachste CRUD Anwendungen mit hyper-komplexen Architekturen zum Scheitern bringst
- …und vieles mehr
Wenn du diese Tipps beachtest, wird dein Chef nie wieder auf die Idee kommen, seine IT zu modernisieren und du kannst weiterhin deinen geliebten Monolithen pflegen.
Elixir - Easy fun for busy developers @ Devoxx 2016David Schmitz
Did you ever want to create an application that is never down?
Have you ever been jealous of those Erlang guys, that produce applications that practically never fail?
Have you tried Erlang and fled because of its baroque syntax and tooling?
Enter Elixir!
Elixir combines Ruby's love for programmers with the absolute power that is the Erlang platform.
This talk will introduce Java programmers to Elixir and OTP. You will gain an understanding of what Elixir brings to the table and how to build highly scale-able systems with a toolset that is actually fun to use.
Even if you will never use Elixir and OTP for you projects, you will learn some of the concepts, that make Erlang into such a powerful ecosystem.
@Devoxx 2016
This talk will introduce you to Javaslang, a library that borrows heavily from Scala and applies Scala's ideas to plain old Java. We will cover some of the productivity enhancements and syntactic sugar that Javaslang offers, such as pattern matching aka. structural composition, value types and functional data types. Javaslang can be a building block for functional business code, that is easy to maintain and understand.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Water billing management system project report.pdfKamal Acharya
Our project entitled “Water Billing Management System” aims is to generate Water bill with all the charges and penalty. Manual system that is employed is extremely laborious and quite inadequate. It only makes the process more difficult and hard.
The aim of our project is to develop a system that is meant to partially computerize the work performed in the Water Board like generating monthly Water bill, record of consuming unit of water, store record of the customer and previous unpaid record.
We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
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Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
The Internet of Things (IoT) is a revolutionary concept that connects everyday objects and devices to the internet, enabling them to communicate, collect, and exchange data. Imagine a world where your refrigerator notifies you when you’re running low on groceries, or streetlights adjust their brightness based on traffic patterns – that’s the power of IoT. In essence, IoT transforms ordinary objects into smart, interconnected devices, creating a network of endless possibilities.
Here is a blog on the role of electrical and electronics engineers in IOT. Let's dig in!!!!
For more such content visit: https://nttftrg.com/
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
38. @koenighotzePainting by Gustav Courbet
java.lang.UnsupportedOperationException at
java.util.Collections$UnmodifiableCollection
.add(Collections.java:1055)
at java.util.stream.AbstractPipeline.<init>
(AbstractPipeline.java:203)
at java.util.stream.ReferencePipeline.<init>
(ReferencePipeline.java:94)
50. @koenighotzePainting by Gustav Courbet
java.lang.IllegalStateException:
stream has already been operated
upon or closed
at java.util.stream.AbstractPipeline.<init>
(AbstractPipeline.java:203)
at java.util.stream.ReferencePipeline.<init>
(ReferencePipeline.java:94)
95. @koenighotze
Strings that are
valid IBANs
public static String check(String iban){
if (validationMagic(iban)) {
return iban;
}
throw new IllegalArgumentException(“Peng”);
}
Partial
function
98. @koenighotze
Strings that are
valid IBANs
Total
function
lift()
All possible
strings
public static String check(String iban){
if (validationMagic(iban)) {
return iban;
}
throw new IllegalArgumentException(“Peng”);
}
Partial
function
116. @koenighotze
“It’s just like the Schrodinger’s cat story,
you keep working with the box and delay
opening it up until it’s completely necessary
to know what’s happening in there.”
— Maurício Linhares
121. @koenighotze
Declarative, infinite test cases
Have you tested for all characters…
…even for 💩?
Have you tested usernames like…
౧ప唆⏑쀋䯰㨼ᮁ娤즶?搃蘸阁뺬ᡧ㫈葷㖒ܪ匘ᤫ䳴㻅
댇껓痯믶㙃銐璚풔랾ᄰ 䩰삀싲闆䩟嗀嗀侀
127. @koenighotze
2017-03-21 10:45:59.913 INFO 45701 --- FrameworkServlet '': initialization started
2017-03-21 10:45:59.925 INFO 45701 --- FrameworkServlet '': initialization completed in 12 ms
Storing User@217b0952[username=rwxbeoigyesbeqqz,email=W`a@0c..-.--db-.T5-.2-g,
Storing User@4e6280de[username=vptafghfwuwwrwall,email=sByP@6jLA4.J.1c..5h269O3-1M6-c6...-.-,,,
Storing User@2fca282c[username=qmhkjdtvbtjzfciwcceqgzfznzkhhcokiyoipdefbr,email=Q96!@6.n8.
Storing User@64d53f0d[publicId=e9d7a121-9f23-483a-828a-f9e3045fc297,username=unflrpvztxtmi...
...
Storing User@1b10f60e[publicId=6f084c18-415c-42c4-b1a8-00c5c1fc9e67,username=xwhpdpjowirsmjym...
Storing User@4b916cc2[publicId=a2b9db2c-0189-4fe8-843d-e709ef3886fa,username=yxdidpexnayyjpzo...
Should not go boom: OK, passed 1000 tests in 3719 ms.
128. @koenighotze
Should not go boom: Falsified after 23 passed tests in 3005 ms.
java.lang.AssertionError: Expected satisfied check result but was Falsified(…,
sample = ( 풧 ꜏, 燤䠽뾌密ᵓ뫶খᄀ ꌎ ⬆鹮 라鄽뾮魨 붐맧놌 엍첮Ԩ䏨
➰ìឧ寅罟 溌椡ﲡ셋欙밶ῴﯯ缲ꢶꇞ⌽ꪂ惗 쎂蘄펮뎷粻뵞?푠쏽쥎,
fzqlbkljxhfrghllzcthvgqiglaabihkzgsqwgfcichamyonmayiewwsfwmw
ntzvozqqydkqillhpyi, +g4@F.8yOkj.-....C6GUP..3.4.-..h-
V74.E.-----2T.z97..3f1ZM6))