Java programs run on the Java Virtual Machine (JVM). The JVM provides a runtime environment that executes Java bytecode. Key aspects of Java include its use of object-oriented programming, garbage collection, and strong typing. Popular integrated development environments for Java include Eclipse and IntelliJ IDEA.
java-corporate-training-institute-in-mumbaiUnmesh Baile
Vibrant Technologies is headquarted in Mumbai,India.We are the best Java training provider in Navi Mumbai who provides Live Projects to students.We provide Corporate Training also.We are Best Java classes in Mumbai according to our students and corporators
Previously we had begin with Java Tutorial beginners guide featuring – What is Java , features of Java Programming Language , Java editors and different Java editions and Java Application Types . Now on Java tutorial we begin with the section 2 that is about JVM – Java Virtual Machine . And also about the difference between JDK Vs JRE Vs JVM including other aspects of Java Virtual Machine .
https://maccablo.com/java-virtual-machine-jdk-jre-jvm/
Aim of this presentation is not to make you masters in Java 8 Concurrency, but to help you guide towards that goal. Sometimes it helps just to know that there is some API that might be suitable for a particular situation. Make use of the pointers given to search more and learn more on those topics. Refer to books, Java API Documentation, Blogs etc. to learn more. Examples and demos for all cases discussed will be added to my blog www.javajee.com.
java-corporate-training-institute-in-mumbaiUnmesh Baile
Vibrant Technologies is headquarted in Mumbai,India.We are the best Java training provider in Navi Mumbai who provides Live Projects to students.We provide Corporate Training also.We are Best Java classes in Mumbai according to our students and corporators
Previously we had begin with Java Tutorial beginners guide featuring – What is Java , features of Java Programming Language , Java editors and different Java editions and Java Application Types . Now on Java tutorial we begin with the section 2 that is about JVM – Java Virtual Machine . And also about the difference between JDK Vs JRE Vs JVM including other aspects of Java Virtual Machine .
https://maccablo.com/java-virtual-machine-jdk-jre-jvm/
Aim of this presentation is not to make you masters in Java 8 Concurrency, but to help you guide towards that goal. Sometimes it helps just to know that there is some API that might be suitable for a particular situation. Make use of the pointers given to search more and learn more on those topics. Refer to books, Java API Documentation, Blogs etc. to learn more. Examples and demos for all cases discussed will be added to my blog www.javajee.com.
JDK stand for java development kit.
JVM stands for Java Virtual Machine.
JRE is the responsible unit to run the java program.
JIT stands for Just In Time compiler.
Basic difference between jdk,jre,jvm in advance java coursePreeti Agarwal
ExlTech is a best Java Training Institute in Pune which provides exclusive practical training on live projects with 100% Job guarantee. Java Certification Course comprises of Java basics, Core Java Programming, Advance Java & Soft Skills
Lock-free algorithms for Kotlin CoroutinesRoman Elizarov
Presentation for SPTCC 2017 - http://neerc.ifmo.ru/sptcc/
Video (part 1): https://www.youtube.com/watch?v=W2dOOBN1OQI
Video (part 2): https://www.youtube.com/watch?v=iQsN_IDUTSc
With Java 8 adoption skyrocketing, is Scala still relevant? In our opinion, the answer is an unequivocal yes. To make our point, Tomer Gabel (system architect at Wix) will showcase practical examples where Scala's features provide a definitive advantage over Java 8. These include:
* Effective logging with traits and by-name parameters;
* Pattern matching for fun and profit;
* Type-safe, efficient serialization with type classes.
A talk given at a Wix Ukraine R&D meetup in Dnipropetrovsk, Ukraine on 6 April, 2016.
Video recording: https://youtu.be/EXxA3PlcdBg?t=3680
Sample code: https://github.com/holograph/scala-vs-java8
You spend your precious time building the perfect application. You do everything right. You carefully craft every piece of code and rigorously follow the best practices and design patterns, you apply the most successful methodologies software engineering has to offer with discipline, and you pay attention to the most minuscule of details to produce the best user experience possible. It all pays off eventually, and you end up with a beautiful code base that is not only reliable but also performs well. You proudly watch your baby grow, as new users come in bringing more traffic your way and craving new features. You keep them happy and they keep coming back. One morning, you wake up to servers crashing under load, and data stores failing to keep up with all the demand. You panic. You throw in more hardware and try optimize, but the hungry crowd that was once your happy user base catches up to you. Your success is slipping through your fingers. You find yourself stuck between having to rewrite the whole application and a hard place. It's frustrating, dreadful, and painful to say the least. Don't be that guy! Save your soul before it's too late, and come to learn how to build, deploy, and maintain enterprise-grade Java applications that scale from day one. Topics covered include: parallelism, load distribution, state management, caching, big data, asynchronous processing, and static content delivery. Leveraging cloud computing, scaling teams and DevOps will also be discuss. P.S. This session is more technical than you might think.
http://jaxconf.com/sessions/economies-scaling-software
JDK stand for java development kit.
JVM stands for Java Virtual Machine.
JRE is the responsible unit to run the java program.
JIT stands for Just In Time compiler.
Basic difference between jdk,jre,jvm in advance java coursePreeti Agarwal
ExlTech is a best Java Training Institute in Pune which provides exclusive practical training on live projects with 100% Job guarantee. Java Certification Course comprises of Java basics, Core Java Programming, Advance Java & Soft Skills
Lock-free algorithms for Kotlin CoroutinesRoman Elizarov
Presentation for SPTCC 2017 - http://neerc.ifmo.ru/sptcc/
Video (part 1): https://www.youtube.com/watch?v=W2dOOBN1OQI
Video (part 2): https://www.youtube.com/watch?v=iQsN_IDUTSc
With Java 8 adoption skyrocketing, is Scala still relevant? In our opinion, the answer is an unequivocal yes. To make our point, Tomer Gabel (system architect at Wix) will showcase practical examples where Scala's features provide a definitive advantage over Java 8. These include:
* Effective logging with traits and by-name parameters;
* Pattern matching for fun and profit;
* Type-safe, efficient serialization with type classes.
A talk given at a Wix Ukraine R&D meetup in Dnipropetrovsk, Ukraine on 6 April, 2016.
Video recording: https://youtu.be/EXxA3PlcdBg?t=3680
Sample code: https://github.com/holograph/scala-vs-java8
You spend your precious time building the perfect application. You do everything right. You carefully craft every piece of code and rigorously follow the best practices and design patterns, you apply the most successful methodologies software engineering has to offer with discipline, and you pay attention to the most minuscule of details to produce the best user experience possible. It all pays off eventually, and you end up with a beautiful code base that is not only reliable but also performs well. You proudly watch your baby grow, as new users come in bringing more traffic your way and craving new features. You keep them happy and they keep coming back. One morning, you wake up to servers crashing under load, and data stores failing to keep up with all the demand. You panic. You throw in more hardware and try optimize, but the hungry crowd that was once your happy user base catches up to you. Your success is slipping through your fingers. You find yourself stuck between having to rewrite the whole application and a hard place. It's frustrating, dreadful, and painful to say the least. Don't be that guy! Save your soul before it's too late, and come to learn how to build, deploy, and maintain enterprise-grade Java applications that scale from day one. Topics covered include: parallelism, load distribution, state management, caching, big data, asynchronous processing, and static content delivery. Leveraging cloud computing, scaling teams and DevOps will also be discuss. P.S. This session is more technical than you might think.
http://jaxconf.com/sessions/economies-scaling-software
20151123 a future resilient – tracking the trendsdbyhundred
Plenary Presentation to the Association for Geographic Information annual conference 2015. A future resilient covered the trends in cloud, data and execution and proposes that location tech was the first to experience all of these.
Blocks is a cool concept and is very much needed for performance improvements and responsiveness. GCD helps run blocks effortlessly by scheduling on a desired queue, priority and lots more.
Java 9 is just around the corner. In this session, we'll describe the new modularization support (Jigsaw), new JDK tools, enhanced APIs and many performance improvements that were added to the new version.
Introduction to Java program. Hello World.java. Java Virtual Machine Architecture and how it is working. JVM class loader, Run time Memory, and Execution Engine.
Java , basics of java programming, JVM, JRE, JDK detailed explanation. primitive datatype. this ppt explains the basic concepts of java clearly starting from variables to complex programmes. It has 55 slides which gives you better understanding
Java is a high level, an object oriented and mostly used programming language. It has several applications as in web development, app development, android development etc. This is a ppt that will give a basic idea about java its uses and its applications.
Serverless Architectures on AWS in practice - OSCON 2018Manish Pandit
From functions to containers to databases, serverless is a huge paradigm shift. The ability to only pay for what we use and not worry about underlying infrastructure is very tempting to developers and DevOps engineers, and the rate of innovation in this area has been very rapid across all major public cloud providers. Serverless architectures are the natural evolution of microservices design. While Lambda has become synonymous with serverless in AWS, there are several new and upcoming patterns that take serverless architectures to the next level.
Manish Pandit explains how to identify these patterns and put them to use. Using Marqeta’s efforts to move its payments infrastructure to the public cloud as an example, Manish explores the services that Marqeta considered, customized, hacked around, and successfully implemented as a part of this move.
Immutable AWS Deployments with Packer and JenkinsManish Pandit
In this session I will talk about Immutable Deployments - which have become almost essential in the world of Microservices. As the frequency of deployments across multiple services increases with increasing granularity, it is critical to have repeatable, predictable and immutable deployments serving our customers. In practice, this is achieved via several DevOps tools. We will use Hashicorp Packer (packer.io) and Jenkins to build a simple, immutable AWS deployment of a hello-world microservice. Familiarity with AWS is recommended but not required for this talk.
AWS Lambda with Serverless Framework and JavaManish Pandit
Serverless is a node.js based framework that makes creating, deploying, and managing serverless functions a breeze. We will use AWS Lambda as our FaaS (Function-as-a-Service) provider, although Serverless supports IBM OpenWhisk and Microsoft Azure as well.
In this session, we will talk about Serverless Applications, and Create and deploy a java-maven based AWS Lambda API. We will also explore the command line interface to manage lambda, which is provided out of the box by serverless framework.
Securing your APIs with OAuth, OpenID, and OpenID ConnectManish Pandit
As products and companies move towards IoT model, users and machines alike need to interact with various APIs. Securing these APIs in a connected world can be a challenge faced by many. Fortunately, there are open standards addressing even the most complex of use cases - OAuth, OpenID and OpenID Connect happen to be widely adopted and have a growing support across many API and Identity Providers. In this session I'll talk about these standards, and walk through common use cases/flows from an API Provider as well as consumer's side. We will explore how these standards come together to not only secure the APIs, but also manage identity.
OSCON 2014 - API Ecosystem with Scala, Scalatra, and Swagger at NetflixManish Pandit
In this talk I’d like to introduce the Scala-based API stack at Partner Innovation Group at Netflix. After seeing a massive growth in the business model and the device ecosystem, we needed a system that could scale and be flexible at the same time. Scala provided the answer and we started with a basic set of APIs which, since then, has evolved towards complex but flexible business flows. Supporting metadata for over hundreds of brands and thousands of devices, the API development has followed a well thought-out, test-driven approach, git-flow, and what most API developers dread – documentation. I will talk about the architecture of the RESTful APIs, and the development + deployment process. We use Netflix-OSS components heavily in the architecture and cloud deployment, so I will cover them as well.
Swagger is what we used for type-safe documentation, which is really easy to use and integrate. I will briefly talk about customizations we’ve done to Swagger in order to make it far more usable at Netflix.
Throughout this effort there were lessons to be learnt, and plenty of best practices and recommendations for anyone starting out to build RESTful APIs, regardless of the platform or stack of choice. It’d be a great opportunity for me to walk through the architecture, and talk about the various components, technologies, and practices that are seeing increasing adoption in the modern, API driven landscape.
APIs have become a part of the product ecosystem - and help the businesses by extending their developer base, and offering seamless integration with other services or products. Sometimes, the APIs themselves are the product. However, with so many APIs around, patterns emerge. Patterns are repeatable, reusable solutions to commonly occurring problems. Where there are patterns, there are also antipatterns. While APIs are not a new paradigm - there are no set standards or specifications formed by a committees or governing bodies for APIs. On top of this, the APIs are often built at various stages of the product, and have a good chance of being disjoint as more are added. In this talk Netflix engineers will discuss various antipatterns that creep into the API design and implementation, and how to identify and avoid them. They will also share their experiences with building APIs. While the antipatterns do not pose as big a functional challenge, they can and do impact integration efforts, scalability and performance among other things. After this session, you should be able to get familiar with the best practices around solving the most common patterns, and make your engineers and API consumers happy!
Building Apis in Scala with Playframework2Manish Pandit
My talk at Silicon Valley Code Camp 2013.
Two years ago I gave a talk on PlayFramework with Java at SVCC. As with everything, PlayFramework has evolved into a far mature ecosystem with native Scala support, and Typesafe backing. PlayFramework 2 is a simple, MVC-based, convention over configuration web application framework for Java and Scala. It is rapidly gaining popularity as more and more companies are adopting it for building scalable, performant, share-nothing architectures. In this talk I'll cover the fundamentals of Play! Framework2, a brief overview of Scala, and demonstrate building a simple, RESTful API. This will be a very interactive, and hands-on session. It'd be awesome if you have played around with Scala, but if you have not, the scope of this talk does not require you to be a Scala expert. It will however be very useful if you've worked with other Web Application Frameworks like Jersey, CXF, etc. so you can cross-relate the concepts.
My talk at Scala Bay Meetup at Netflix about Powering the Partner APIs with Scalatra and Netflix OSS. This talk was delivered on September 9th 2013, at 8 PM at Netflix, Los Gatos.
Introducing Scala to your Ruby/Java Shop : My experiences at IGNManish Pandit
With the move to SOA, IGN's API engineering became a traditional Java/Ruby shop. We introduced Scala to the team in August '11. As of April '12 we have our major services running on Scala, and we could not be happier. I'll talk about the strategic & tactical rationale, gradual introduction to the new language, cultivating experts and mentoring junior developers. We will also cover the common roadblocks the leaders may run into, addressing the concerns of engineers and stakeholders, and building an engineering culture that facilitates innovation and talent growth. Please note that this talk is not a Ruby/Java/Scala religious debate - we believe in using the best tool for the job; and what works for us may not work for every org (which is where the culture comes in). My team's journey from "Holy crap! This looks academic and scary!" to "Let me whip out a service by EOD today" in a matter of months is something I am very proud of, and would love to share it with fellow developer community.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
2. Java Echosystem
• Java as a programming language
• Java as runtime platform/virtual machine
• Java libraries (collections, database drivers..)
3. Java the programming language
• Object Oriented
• Multi-threaded, Concurrent
• Strongly typed
• Garbage collection
• No multiple inheritance
• 2nd most popular language after C at 16%
4. IDEs
• Please, no vim, emacs, pico etc. I completely
get it that you’re rock awesome when you
code on the command line with these tools.
• The IDEs were built to make you productive.
• I use Eclipse, the team uses IntelliJ IDEA. Both
are good.
• Use anything as long as it’s a real IDE
5. Code Organization
• Package Declaration
• Imports
• Class or Interface Declaration
• Members
– Class variables
– Methods
6. Imports
• To use classes from a binary distribution or
source
• Can be wildcarded (discouraged)
• Auto cleanup – Eclipse Ctl-Shift-O
• Unused Imports
7. Packages
• To namespace the Class or Interface
• Act as modules containing groups of Classes or
Interfaces
• Convention
– dot-separated
– com., net., sf., org.
• Can contain subpackages
• Packaging can impact visibility if default scope
is used.
8. Classes
• Have to have the same file name as the public
class
• May or may not be a part of a package
• Can be abstract or concrete and/or final
• Acts as a template to create Objects
9. Classes
• Have a constructor
– Can be private (for singletons)
– Default no-args constructor
– Objects created by using new
<T> varName = new <? extends T>(args);
String myName = new String(“Manish”);
10. Control Structures
• if-else
• for loops
• ternary operator (: ?)
• while loops
• switch/case
• try/catch/finally
• break/continue for loop control
11. Using this
• this provides a reference to the current
instance
• Static members cannot use this, as they do
not have instances (think Class, not Object)
12. Typed Collections and Classes
• Introduced in Java 1.5
• Add strong typing via declaration, so the
compile time checks can be performed
• Syntax:
Collection myCollection = new ArrayList<String>();
14. Threading
• Two ways
– Implement Runnable Interface
– Extend Thread class
• In both cases, you put the implementation in a
method called run()
• A thread is started by instantiating the Thread
and calling start() on it. Never call run()
directly.
15. Concurrent Code
• synchornized method
– Makes a method thread safe
– You cannot synchronize a constructor
• synchronized block
– You can acquire a lock on an object, and write
your code as synchronized(lock) {…}
– All synchronized methods of a class use the same
lock if you use synchronize(this) so be careful!
17. Dependency Injection
• Is used to specify dependencies at runtime,
which get injected (instantiated, associated)
on class initialization.
• Popular Frameworks
– Spring DI
– Google guice
• Declared via configuration, or annotations
18. Maven
• Maven (and Ant, and Gradle..) are build tools
used to manage (large) java projects
• Helps manage dependencies declaratively
• Rich set of plugins to run tests, generate
javadocs, build sites and artifacts
• Everything comes together in pom.xml file.
19. JVM
• A very efficient, tuned virtual machine
• Runs bytecode
• Runtime garbage collection
• Supports monitoring via JMX
• Concurrent
• Target VM for Groovy, Scala and Clojure
20. JVM Memory Model
• Heap
– Where the instance, static variables and Objects
go
– Shared across all threads in the VM
– Automatically garbage collected
• Stack
– Where the methods and local variables go
– Every thread gets its own stack
22. Java Libraries
• Utilities
– Apache Commons
– JodaTime
– Google collections
• Web Frameworks
– JSF
– Struts
• Application Frameworks
– Spring
– Play! Framework
23. Common java packages
Package Description
Java.lang.* Has the core classes like threading, runtime, Data types..
Java.net.* Has networking classes and adapters (think URL)
Java.util.* Hash Collections, Calendar, Time/Locale classes
Java.io.* Has Stream and Buffer handling classes for I/O
Javax.swing.* Thick Client (UI) classes