Introduction to web application development with Vue (for absolute beginners)...Lucas Jellema
In this slide deck I show you how you can easily and quickly create quite rich web applications with Vue 3 – without having to study complex concepts or understand many technical details. I have only recently learned how to work with Vue 3 myself and now is the best time for me to share my learning experience (and my enthusiasm) with you. I know what I found essential to understand and what most got me excited in these early steps (what was a little bit hard to grasp). I believe that I can present my steps and guide you to experience the same fun and have a similarly gratifying experience. I am not an expert in this subject – I have barely learned how to walk and that is why I can help you with these first steps with Vue.
In this deck, I do not explain how Vue works. I do not really know that. I will show you how to work with it and how to create web applications that are functional, appealing, fast and responsive.
The approach I am taking is straightforward:
• I will tell you a little bit about web development, browsers and reactive frameworks
• I will show the hello world of Vue applications
• I will explain about components and nesting, events, data binding and reactive behavior and demonstrate these concepts
• I will introduce Vue UI Component libraries – and with no effort at all we will launch our application to the next level – with rich components to explore, manipulate, visualize data collections
• We will publish the web application from our development environment to where the whole world could see it – using GitHub Pages
• As bonus topic – we discuss state management
At the end of this session you will be able to quickly create a simple yet rich web application with Vue 3. You have a starting point to further evolve your skills with the many online resources I am convinced that you will enjoy your newfound powers and the simplicity and power of Vue 3.
Note: a tutorial accompanies this slide deck - see https://github.com/lucasjellema/code-face-vue3-intro-reactiive-webapps-aug2023/blob/main/README.md
Making the Shift Left - Bringing Ops to Dev before bringing applications to p...Lucas Jellema
Designing, agreeing on, implementing and testing the application is our first challenge. But it does not end there. Applications require tender love and care when they are live. Application Operations needs to be in place along with the functionality of the application. AppOps is the process of making sure that the applications are executed as required and that any problems are detected, reported and dealt with. Some mechanisms used in AppOps: transaction tracing, log analysis, post-data-exchange-checks, health checking of all systems involved, in-production-testing of end-to-end data flows. Additionally, AppOps takes care of configuration management, scaling, cost management, technical life cycle management on solution components. In this session, we will take a closer look at what is required to keep those applications going and how we do ops by design from early on in the agile process.
Lightweight coding in powerful Cloud Development Environments (DigitalXchange...Lucas Jellema
Cloud Based Development environments allow software engineers to work in a new and refreshing way. The development environment runs in the cloud, based on a coded environment definition and with the sources from a specific branch in a Git repository. The environment can be quite powerful in memory, CPU and storage. Development can be done from a lightweight device such as a Chromebook or even a tablet. Switching between different environments becomes a breeze, collaborating in an environment is easily done. Using network tunneling, the IDE could run locally against the remote workspace and remote ports can be accessed on localhost. This session demonstrates both Gitpod and Github Codespaces - similar SaaS offerings with generous free tiers. They are great for quick investigation into new technologies, for working through tutorials and for contributing to open source projects. You will smile at the ease and elegance of engineering your software in this way.
Apache Superset - open source data exploration and visualization (Conclusion ...Lucas Jellema
Introducing Apache Superset - an open source platform for data exploration, visualization and analysis - co-starring Trino and Steampipe for providing SQL access to many non-SQL data sources.
CONNECTING THE REAL WORLD TO ENTERPRISE IT – HOW IoT DRIVES OUR ENERGY TRANSI...Lucas Jellema
Enterprise IT systems are deaf, blind and highly insensitive. They do not know what is going on in the outside world. Through Internet of Things technology, we provide eyes, ears and hands that allow enterprises to learn about and react in real time to events in the physical world. The energy transition at a major Dutch energy company (Eneco) is powered by IoT technology – to steer and sometimes curtail windmills and solar farms and to coordinate local energy production and trade. This session shows you how the physical world was connected to the customer portals and apps, asset management systems and Kafka platform through the Azure cloud based IoT Hub en Edge, digital twin, serverless functions, timeseries datastores and streaming data analysis. It is a story about technological innovation on top of existing foundations and of a vision for business and our society at large.
Help me move away from Oracle - or not?! (Oracle Community Tour EMEA - LVOUG...Lucas Jellema
I hear this aspiration from a growing number of organizations. Sometimes as a quite literal question. This however is merely half of a wish. Apparently, organizations want to quit with one thing — but have not yet stipulated what they desire instead. What is the objective that is pursued here? Only to get rid of Oracle? It will become clear why you should give a considerable thought about dropping Oracle, or any other vendors’ technology, when you’re not pleased with your current IT situation. You need to focus on the actual problems and objectives and define the suitable roadmap to fit your real needs. It turns out that the quest is usually for modernization and flexibility - and Oracle can very well be a part of that future.
Organizations with decades of investment in Oracle technology sometimes (and increasingly) express a wish to move away from Oracle. In this session, we will first explore where the desire to move away from Oracle might come from. Then we describe what the term Oracle represents — more than 2.000 products on all layers in the technology stack and in different business areas. Finally, we map out what the ‘moving away from’ consists of: defining where you ‘move to’ and subsequently actually going there.
It will become clear why you should give considerable thought about dropping Oracle, or any other vendors’ technology, when you’re not pleased with your current IT situation. You need to focus on the actual problems and objectives and define the suitable roadmap to fit your real needs. It turns out that the quest is usually for modernization and flexibility - and Oracle can very well be a part of that future.
Original storyline in this Medium Article: https://medium.com/real-vox/what-if-companies-say-help-me-move-away-from-oracle-ffbbc95afc4f
IoT - from prototype to enterprise platform (DigitalXchange 2022)Lucas Jellema
In 2019 the company started a small scale IoT project: smart meters in consumer homes, a cloud based IoT platform for device management, metrics collecting, monitoring and real time data processing. From the initial 12 devices and this single use case, the initiative has rapidly scaled, to tens of thousands devices - including entire wind parks and solar farms - and seven substantial business cases, not just for harvesting data but increasingly for real time actuation. The IoT Platform is feeding the brain at the heart of the enterprise - through an event streaming platform and an API platform. It supports complex operations with anomaly detection on metrics streams and device and communication monitoring. This session tells about the eye catching business cases - what are business objectives and results - and explains the journey since the start. It continues the story presented at DigitalXchange 2020 - discussing technical challenges and solutions as well as organizational aspects. Areas of particular interest: edge processing, data analytics and machine learning.
Who Wants to Become an IT Architect-A Look at the Bigger Picture - DigitalXch...Lucas Jellema
Pitch: The movie The Matrix made it clear: The Architect is powerful. How to be(come) and IT architect? What do you do, what do you need to know, is it fun and why? Using real world examples, core principles and useful tools, this session introduces the subtle art of designing and realizing flexible IT architectures. </p><p>Taking a step back to get and create an overview, frequently asking why to get to the real intention, bringing aspects such as cost, scale, time and change and business strategy into the design and bridging the gap between business owners, process managers and technical specialists. One way to define the responsibility of an IT architect. In this session, we will discuss what is expected of the architect and what you need to do for that and what you could use to get it done. How do you get started as an architect, how to grow in that role? We discuss a number of real life architectural challenges and solution design. And discuss a number of architecture principles, patterns, and powers to apply. Never stop programming - but perhaps rise to the architecture challenge too.
Notes: Many IT professionals aspire to become architects. Many architects wonder what it is they have to do. After 27 years in IT I find I have slowly and steadily moved into a role that I can probably use the label architect for, although still with some reluctance. What exactly does that mean - IT architect? While I may not have all answers and the ultimate truth and wisdom, I do have many architectural challenges to discuss and some core principles to share and a number of tips, tricks and tools to recommend that will help anyone get started or grow in a role as architect for software and IT systems. Elements that make an appearance include cloud, agile, DevOps, microservices, persistence, business, powers of persuasion, diagramming, cost, security, software engineering, data.
Outline: - two real world examples (one new business initiative, one running and struggling project) and how to approach them with an architect's mind - core principles to apply , patterns to us, what to unearth (the power question of WHY) - architecture products: what do you deliver as an architect; how do you ensure agility? - how to be effective? bringing your design to life - communication with stakeholders/powers of persuasion, monitoring adherence, being pragmatic but not lose grip; - anecdotal evidence from several small and large product teams - the good and also the ugly (architectural oversights and the consequences)
some specific answers to address - how much technical knowledge and programming skills does an architect require? What other knowledge is required and how to stay on top of your game? how to get going: first steps towards be(com)ing and architect?
Introduction to web application development with Vue (for absolute beginners)...Lucas Jellema
In this slide deck I show you how you can easily and quickly create quite rich web applications with Vue 3 – without having to study complex concepts or understand many technical details. I have only recently learned how to work with Vue 3 myself and now is the best time for me to share my learning experience (and my enthusiasm) with you. I know what I found essential to understand and what most got me excited in these early steps (what was a little bit hard to grasp). I believe that I can present my steps and guide you to experience the same fun and have a similarly gratifying experience. I am not an expert in this subject – I have barely learned how to walk and that is why I can help you with these first steps with Vue.
In this deck, I do not explain how Vue works. I do not really know that. I will show you how to work with it and how to create web applications that are functional, appealing, fast and responsive.
The approach I am taking is straightforward:
• I will tell you a little bit about web development, browsers and reactive frameworks
• I will show the hello world of Vue applications
• I will explain about components and nesting, events, data binding and reactive behavior and demonstrate these concepts
• I will introduce Vue UI Component libraries – and with no effort at all we will launch our application to the next level – with rich components to explore, manipulate, visualize data collections
• We will publish the web application from our development environment to where the whole world could see it – using GitHub Pages
• As bonus topic – we discuss state management
At the end of this session you will be able to quickly create a simple yet rich web application with Vue 3. You have a starting point to further evolve your skills with the many online resources I am convinced that you will enjoy your newfound powers and the simplicity and power of Vue 3.
Note: a tutorial accompanies this slide deck - see https://github.com/lucasjellema/code-face-vue3-intro-reactiive-webapps-aug2023/blob/main/README.md
Making the Shift Left - Bringing Ops to Dev before bringing applications to p...Lucas Jellema
Designing, agreeing on, implementing and testing the application is our first challenge. But it does not end there. Applications require tender love and care when they are live. Application Operations needs to be in place along with the functionality of the application. AppOps is the process of making sure that the applications are executed as required and that any problems are detected, reported and dealt with. Some mechanisms used in AppOps: transaction tracing, log analysis, post-data-exchange-checks, health checking of all systems involved, in-production-testing of end-to-end data flows. Additionally, AppOps takes care of configuration management, scaling, cost management, technical life cycle management on solution components. In this session, we will take a closer look at what is required to keep those applications going and how we do ops by design from early on in the agile process.
Lightweight coding in powerful Cloud Development Environments (DigitalXchange...Lucas Jellema
Cloud Based Development environments allow software engineers to work in a new and refreshing way. The development environment runs in the cloud, based on a coded environment definition and with the sources from a specific branch in a Git repository. The environment can be quite powerful in memory, CPU and storage. Development can be done from a lightweight device such as a Chromebook or even a tablet. Switching between different environments becomes a breeze, collaborating in an environment is easily done. Using network tunneling, the IDE could run locally against the remote workspace and remote ports can be accessed on localhost. This session demonstrates both Gitpod and Github Codespaces - similar SaaS offerings with generous free tiers. They are great for quick investigation into new technologies, for working through tutorials and for contributing to open source projects. You will smile at the ease and elegance of engineering your software in this way.
Apache Superset - open source data exploration and visualization (Conclusion ...Lucas Jellema
Introducing Apache Superset - an open source platform for data exploration, visualization and analysis - co-starring Trino and Steampipe for providing SQL access to many non-SQL data sources.
CONNECTING THE REAL WORLD TO ENTERPRISE IT – HOW IoT DRIVES OUR ENERGY TRANSI...Lucas Jellema
Enterprise IT systems are deaf, blind and highly insensitive. They do not know what is going on in the outside world. Through Internet of Things technology, we provide eyes, ears and hands that allow enterprises to learn about and react in real time to events in the physical world. The energy transition at a major Dutch energy company (Eneco) is powered by IoT technology – to steer and sometimes curtail windmills and solar farms and to coordinate local energy production and trade. This session shows you how the physical world was connected to the customer portals and apps, asset management systems and Kafka platform through the Azure cloud based IoT Hub en Edge, digital twin, serverless functions, timeseries datastores and streaming data analysis. It is a story about technological innovation on top of existing foundations and of a vision for business and our society at large.
Help me move away from Oracle - or not?! (Oracle Community Tour EMEA - LVOUG...Lucas Jellema
I hear this aspiration from a growing number of organizations. Sometimes as a quite literal question. This however is merely half of a wish. Apparently, organizations want to quit with one thing — but have not yet stipulated what they desire instead. What is the objective that is pursued here? Only to get rid of Oracle? It will become clear why you should give a considerable thought about dropping Oracle, or any other vendors’ technology, when you’re not pleased with your current IT situation. You need to focus on the actual problems and objectives and define the suitable roadmap to fit your real needs. It turns out that the quest is usually for modernization and flexibility - and Oracle can very well be a part of that future.
Organizations with decades of investment in Oracle technology sometimes (and increasingly) express a wish to move away from Oracle. In this session, we will first explore where the desire to move away from Oracle might come from. Then we describe what the term Oracle represents — more than 2.000 products on all layers in the technology stack and in different business areas. Finally, we map out what the ‘moving away from’ consists of: defining where you ‘move to’ and subsequently actually going there.
It will become clear why you should give considerable thought about dropping Oracle, or any other vendors’ technology, when you’re not pleased with your current IT situation. You need to focus on the actual problems and objectives and define the suitable roadmap to fit your real needs. It turns out that the quest is usually for modernization and flexibility - and Oracle can very well be a part of that future.
Original storyline in this Medium Article: https://medium.com/real-vox/what-if-companies-say-help-me-move-away-from-oracle-ffbbc95afc4f
IoT - from prototype to enterprise platform (DigitalXchange 2022)Lucas Jellema
In 2019 the company started a small scale IoT project: smart meters in consumer homes, a cloud based IoT platform for device management, metrics collecting, monitoring and real time data processing. From the initial 12 devices and this single use case, the initiative has rapidly scaled, to tens of thousands devices - including entire wind parks and solar farms - and seven substantial business cases, not just for harvesting data but increasingly for real time actuation. The IoT Platform is feeding the brain at the heart of the enterprise - through an event streaming platform and an API platform. It supports complex operations with anomaly detection on metrics streams and device and communication monitoring. This session tells about the eye catching business cases - what are business objectives and results - and explains the journey since the start. It continues the story presented at DigitalXchange 2020 - discussing technical challenges and solutions as well as organizational aspects. Areas of particular interest: edge processing, data analytics and machine learning.
Who Wants to Become an IT Architect-A Look at the Bigger Picture - DigitalXch...Lucas Jellema
Pitch: The movie The Matrix made it clear: The Architect is powerful. How to be(come) and IT architect? What do you do, what do you need to know, is it fun and why? Using real world examples, core principles and useful tools, this session introduces the subtle art of designing and realizing flexible IT architectures. </p><p>Taking a step back to get and create an overview, frequently asking why to get to the real intention, bringing aspects such as cost, scale, time and change and business strategy into the design and bridging the gap between business owners, process managers and technical specialists. One way to define the responsibility of an IT architect. In this session, we will discuss what is expected of the architect and what you need to do for that and what you could use to get it done. How do you get started as an architect, how to grow in that role? We discuss a number of real life architectural challenges and solution design. And discuss a number of architecture principles, patterns, and powers to apply. Never stop programming - but perhaps rise to the architecture challenge too.
Notes: Many IT professionals aspire to become architects. Many architects wonder what it is they have to do. After 27 years in IT I find I have slowly and steadily moved into a role that I can probably use the label architect for, although still with some reluctance. What exactly does that mean - IT architect? While I may not have all answers and the ultimate truth and wisdom, I do have many architectural challenges to discuss and some core principles to share and a number of tips, tricks and tools to recommend that will help anyone get started or grow in a role as architect for software and IT systems. Elements that make an appearance include cloud, agile, DevOps, microservices, persistence, business, powers of persuasion, diagramming, cost, security, software engineering, data.
Outline: - two real world examples (one new business initiative, one running and struggling project) and how to approach them with an architect's mind - core principles to apply , patterns to us, what to unearth (the power question of WHY) - architecture products: what do you deliver as an architect; how do you ensure agility? - how to be effective? bringing your design to life - communication with stakeholders/powers of persuasion, monitoring adherence, being pragmatic but not lose grip; - anecdotal evidence from several small and large product teams - the good and also the ugly (architectural oversights and the consequences)
some specific answers to address - how much technical knowledge and programming skills does an architect require? What other knowledge is required and how to stay on top of your game? how to get going: first steps towards be(com)ing and architect?
Steampipe - use SQL to retrieve data from cloud, platforms and files (Code Ca...Lucas Jellema
Introduction to Steampipe - a tool for retrieving data and metadata about cloud resources, platform resources and file content - all through SQL. Data from clouds, files and platforms can be joined, filtered, sorted, aggregated using regular SQL. Steampipe offers a very convenient way to get hold of data that describes the environment in detail.
Automation of Software Engineering with OCI DevOps Build and Deployment Pipel...Lucas Jellema
Automation of software delivery has several advantages. Prevention of human error is certainly one. Consistent and complete execution of tried and tested build and deployment tasks as the only way to apply changes in the live environment. Once the pipelines have been set up, the engineers can focus on the software and applying the required changes to it. To bring that software all the way to production is a breeze. Oracle Cloud Infrastructure offers the DevOps service, introduced in the Summer of 2021. This service comes with git style code repositories, build servers and build pipelines, artifact repositories as well as deployment pipelines. This session introduces OCI DevOps and demonstrates how software can be built and deployed on OKE Kubernetes, Compute Instance VMs and Oracle Functions. From simple source code an application is put in production without manual intervention in the build and deployment process.
Introducing Dapr.io - the open source personal assistant to microservices and...Lucas Jellema
Dapr.io is an open source product, originated from Microsoft and embraced by a broad coalition of cloud suppliers (part of CNFC) and open source projects. Dapr is a runtime framework that can support any application and that especially shines with distributed applications - for example microservices - that run in containers, spread over clouds and / or edge devices.
With Dapr you give an application a "sidecar" - a kind of personal assistant that takes care of all kinds of common responsibilities. Capturing and retrieving state, publishing and consuming messages or events. Reading secrets and configuration data. Shielding and load balancing over service endpoints. Calling and subscribing to all kinds of SaaS and PaaS facilities. Logging traces across all kinds of application components and logically routing calls between microservices and other application components. Dapr provides generic APIs to the application (HTTP and gRPC) for calling all these generic services – and provides implementations of these APIs for all public clouds and dozens of technology components. This means that your application can easily make use of a wide range of relevant features - with a strict separation between the language the application uses for this (generic, simple) and the configuration of the specific technology (e.g. Redis, MySQL, CosmosDB, Cassandra, PostgreSQL, Oracle Database, MongoDB, Azure SQL etc) that the Dapr sidecar uses. Changing technology does not affect the application, but affects the configuration of the Sidecar. Dapr can be used from applications in any technology - from Java and C#/.NET to Go, Python, Node, Rust and PHP. Or whatever can talk HTTP (or gRPC).
In this Code Café I will introduce you to Dapr.io. I will show you what Dapr can do for you (application) and how you can Dapr-izen an application. I'll show you how an asynchronously collaborative system of microservices - implemented in different technologies - can be easily connected to Dapr, first to Redis as a Pub/Sub mechanism and then also to Apache Kafka without modifications. Then we do - with the interested parties - also a hands-on in which you will apply Dapr yourself . In a short time you get a good feel for how you can use Dapr for different aspects of your applications. And if nothing else, Dapr is a very easy way to get your code with Kafka, S3, Redis, Azure EventGrid, HashiCorp Consul, Twillio, Pulsar, RabbitMQ, HashiCorp Vault, AWS Secret Manager, Azure KeyVault, Cron, SMTP, Twitter, AWS SQS & SNS, GCP Pub/Sub and dozens of other technology components talk.
How and Why you can and should Participate in Open Source Projects (AMIS, Sof...Lucas Jellema
For a long time I have been reluctant to actively contribute to an open source project. I thought it would be rather complicated and demanding – and that I didn't have the knowledge or skills for it or at the very least that they (the project team) weren't waiting for me.
In December 2021, I decided to have a serious input into the Dapr.io project – and now finally to determine how it works and whether it is really that complicated. In this session I want to tell you about my experiences. How Fork, Clone, Branch, Push (and PR) is the rhythm of contributing to an open source project and how you do that (these are all Git actions against GitHub repositories). How to learn how such a project functions and how to connect to it; which tools are needed, which communication channels are used. I tell how the standards of the project – largely automatically enforced – help me to become a better software engineer, with an eye for readability and testability of the code.
How the review process is quite exciting once you have offered your contribution. And how the final "merge to master" of my contribution and then the actual release (Dapr 1.6 contains my first contribution) are nice milestones.
I hope to motivate participants in this session to also take the step yourself and contribute to an open source project in the form of issues or samples, documentation or code. It's valuable to the community and the specific project and I think it's definitely a valuable experience for the "contributer". I looked up to it and now that I've done it gives me confidence – and it tastes like more (I could still use some help with the work on Dapr.io, by the way).
Microservices, Apache Kafka, Node, Dapr and more - Part Two (Fontys Hogeschoo...Lucas Jellema
Apache Kafka is one of the best known enterprise grade message brokers – created at LinkedIn, donated to the Apache software foundation and used in an ever growing number of organizations to provide a backbone for asynchronous communication. This session introduces Apache Kafka – history, concepts, community and tooling. In a hands on lab, participants will create topics, publish and consume messages and get a general feel for Kafka. Simple microservices are developed in NodeJS – publishing to and consuming from Apache Kafka.
Dapr.io has support for Apache Kafka. Using Kafka through Dapr is very straightforward as is explained and demonstrated and applied in a second handson lab – with applications in various programming languages. Participants will even be able to exchange events across their laptops – through a cloud based Kafka broker.
Use of Apache Kafka in several architecture patterns is discussed – such as data integration, microservices, CQRS, Event Sourcing – along with a number of real world use cases from several well known organizations. The Kafka Connector framework is introduced – a set of adapters that allow us to easily connect Kafka to sources and sinks – where respectively change events are captured from and messages are published to.
Bonus Lab: Apache Kafka is ran on Kubernetes as is Dapr.io. Multiple mutually interacting microservices are deployed on the same local Kubernetes cluster.
Microservices, Node, Dapr and more - Part One (Fontys Hogeschool, Spring 2022)Lucas Jellema
This session does a quick recap of microservices: why do we want them, what problems do they solve and what are the principles around designing and implementing them? The Dapr.io runtime framework for distributed applications is introduced. Dapr provides a sidecar (almost like a personal assistant to a manager) to an application or microservice, a companion process that handles common tasks such as storing and retrieving state, consuming and publishing messages and events, invoking external services and other microservices as well as handling incoming requests. Participants will do a handson lab with Dapr.io and learn how to quickly implement interactions with various technologies, including Redis and MySQL.
Node(JS) is introduced – a server side JavaScript-based programming language that can be used well for implementing microservices. Some of the main characteristics of NodeJS are discussed (functional programming, asynchronous flows, NPM package manager) as well as common use cases (handle incoming HTTP requests, invoke REST APIs). In the second lab, Node and Dapr are used together to implement microservices that interact with databases and message brokers and each other – in a decoupled fashion.
6Reinventing Oracle Systems in a Cloudy World (RMOUG Trainingdays, February 2...Lucas Jellema
The cloud is changing many things. Even the decision to not (yet) adopt cloud is one to make explicitly. Now is a time for any organization to reconsider the IT landscape. For each system we should make a conscious ruling on its roadmap. The 6R model suggests six ways to move a system forward.
This session uses the 6R model and applies it specifically to Oracle technology based systems: what are the options and considerations for Oracle Database, Oracle Fusion Middleware, custom applications, and other red components? What future should we consider and how do we choose? The paths chosen by several Oracle-heavy users is presented to illustrate these options and the decision making process. Oracle Cloud Infrastructure and Autonomous Database play a role, as do Azure IaaS and Azure Managed Database as well as on premises systems. Latency, recovery, scalability, licenses, automation, lock-in, skills, and resources all make their appearance.
Help me move away from Oracle! (RMOUG Training Days 2022, February 2022)Lucas Jellema
Organizations with decades of investment in Oracle technology sometimes (and increasingly) express a wish to move away from Oracle. In this session, we will first explore where the desire to move away from Oracle might come from. Then we describe what the term Oracle represents -- more than 2.000 products on all layers in the technology stack and in different business areas. Finally, we map out what the 'moving away from' consists of: defining where you 'move to' and subsequently actually going there.
It will become clear why you should give considerable thought about dropping Oracle, or any other vendors' technology, when you're not pleased with your current IT situation. You need to focus on the actual problems and objectives and define the suitable roadmap to fit your real needs. It turns out that the quest is usually for modernization and flexibility - and Oracle can very well be a part of that future.
DevOps is a term used in many places and unfortunately also to mean many different things. This presentation (largely in Dutch) paints the DevOps picture. While it may not give a clear cut definition (there does not seem to be one) it certainly makes clear what DevOps is about, what objectives and origins are and which factors enable and drive DevOps.
Conclusion Code Cafe - Microcks for Mocking and Testing Async APIs (January 2...Lucas Jellema
Microcks is a tool for API Mocking and Testing. In this presentation an overview of the support in Microcks for asynchronous APIs - the event publishing and consuming behavior of services and applications
Cloud native applications offer scalability, flexibility, and optimal use of compute resources. Serverless functions interacting through events, leveraging cloud capabilities for persistent storage and automated operations take organization to the next level in IT. This session demonstrates polyglot Functions interacting with native cloud services for events and persistence (Object Storage and NoSQL Database) and leveraging the Key and Secrets Vault, Monitoring and Notifications services for operational control. A lightweight API Gateway is used to expose APIs to external consumers. Infrastructure as Code is the guiding principle in deploying both cloud resources and application components, through OCI CLI and Terraform. This session leverages many cloud native (enabling) services in Oracle Cloud Infrastructure. The session will introduce concepts, then spend most of the time on live demonstrations. All sources are shared with the audience, to allow participants to create the same application in their own cloud tenancy. What is so great about Cloud Native Applications? How do you create one? I will explain the first and demonstrate the second. On Oracle Cloud Infrastructure, using services that anyone can use for free, I will live create a cloud native application that streams, persists, notifies, scales, monitors Benefits: - get to know many different OCI services - understand the meaning, purpose and benefits of cloud native development - learn how to take your own first steps in OCI - for free!
Software Engineering as the Next Level Up from Programming (Oracle Groundbrea...Lucas Jellema
Software engineering is programming with the added dimension of time: programs that can evolve and scale, be maintained and be operated by multiple people over a longer period of time. What does it take to do software engineering in a professional manner - beyond mere programming? As programmers, our main goal is to make IT work. To translate functional specification into executable code. And sure, that is the least we can do. But we have more responsibility than this. We have to produce software that is robust and will reliably handle expected and unexpected cases. Software that is scalable and can handle expected and somewhat unexpected load gracefully. With minimal operating costs and in the greenest way possible. Software that is observable and manageable and that can be evolved with changing and new functional requirements and with changing technology. Software that will be legacy in the original, positive meaning of the word. That does not depend on the one big brain in our team or on the guy that has been around for three decades. Software that we know is good and can comfortably be modified in a controlled and productive way. We have to grow from excellent programmers to professional software engineers. This session talks about what it takes to create our code with honor. It discusses automation at every level in the build, rollout and monitoring of infrastructure (as code), platform and application, using CI/CD pipelines and DevOps procedures and tools. The session talks about testing – before and during development as well as after each change anywhere in the system and for both functional and non-functional aspects. Test driven development, regression testing and smoke testing are among the concepts discussed. The term ‘clean code’ refers to code that is readable, testable and maintainable. Through code analysis and peer reviews and by performing refactoring we constantly refine our software to be collectively adaptable. The session demonstrates the concepts discussed with code samples in the context of cloud native programming. As software engineers, we have an obligation to society, to our peers and to ourselves to not only write software that does the job, but to create code that is good. Ours is a great and meaningful line of work, especially if we raise our game professionally to code with honor.
Triple C - Centralize, Cloudify and Consolidate Dozens of Oracle Databases (O...Lucas Jellema
Dozens of Oracle Databases - each health center location has one on its local server with the same data model and the same set of applications. These databases have to be centralized and cloudified and also be consolidated into one or as few databases as possible. To lower costs, ease operations and enable innovation. Each location can access only its own data, applications do not have to be changed and different locations can run different versions of applications and database objects. This is the story of a critical migration. About the cloud ready analysis, the Proofs of Concept with Oracle Database features VPD and Edition Based Redefinition, the scalability investigation, the redesign of change management, rollout and operational management processes and the careful modernization of a 25 year old platform on the latest database release and a shiny new, fully automated cloud platform.This is the story of an organization that had state of the art systems in the mid-90s. And they have these same systems today - no longer state of the art. They can keep the systems alive, but barely, and at increasing cost. In the Fall of 2020, we started an investigation into the feasibility of bringing the 100s of databases from each of the locations together, in a central location, in the cloud and finally: consolidated into one or at least as few database instances as possible. Using Oracle Database Virtual Private Database and Edition Based Redefinition, a smart database connection configuration in each site and a limited reimplementation of non-cloud/non-consolidated mechanisms (interaction with local file system for example) we have designed and proven a working new design and migration approach.
Who Wants to Become an IT Architect? A Look at the Bigger Picture (Oracle Gro...Lucas Jellema
The movie The Matrix made it clear: The Architect is powerful. How to be(come) and IT architect? What do you do, what do you need to know, is it fun and why? Using real world examples, core principles and useful tools, this session introduces the subtle art of designing and realizing flexible IT architectures. Taking a step back to get and create an overview, frequently asking why to get to the real intention, bringing aspects such as cost, scale, time and change and business strategy into the design and bridging the gap between business owners, process managers and technical specialists. One way to define the responsibility of an IT architect. In this session, we will discuss what is expected of the architect and what you need to do for that and what you could use to get it done. How do you get started as an architect, how to grow in that role? We discuss a number of real life architectural challenges and solution design. And discuss a number of architecture principles, patterns, and powers to apply. Never stop programming – but perhaps rise to the architecture challenge too.
Cloud native applications offer scalability, flexibility, and optimal use of compute resources. Serverless functions interacting through events, leveraging cloud capabilities for persistent storage and automated operations take organization to the next level in IT. This session demonstrates polyglot Functions interacting with native cloud services for events and persistence (Object Storage and NoSQL Database) and leveraging the Key and Secrets Vault, Monitoring and Notifications services for operational control. A lightweight API Gateway is used to expose APIs to external consumers. Infrastructure as Code is the guiding principle in deploying both cloud resources and application components, through OCI CLI and Terraform. This session leverages many cloud native (enabling) services in Oracle Cloud Infrastructure. The session will introduce concepts, then spend most of the time on live demonstrations. All sources are shared with the audience, to allow participants to create the same application in their own cloud tenancy.
What is so great about Cloud Native Applications? How do you create one? I will explain the first and demonstrate the second. On Oracle Cloud Infrastructure, using services that anyone can use for free, I will live create a cloud native application that streams, persists, notifies, scales, monitors
Code with Honor – on the importance and beauty of software programming - RMOU...Lucas Jellema
We want to be able to look our customer (and our mom) in the eye and state that we are proud of the software we have delivered. Because it is a high quality and lasting product. But can we really? Let’s discuss how to bring our profession to the next level.How to be a Professional Software Professional
Abstract
As programmers, our main goal is to make IT work. To translate functional specification into executable code. And sure, that is the least we can do. But we have more responsibility than this. We have to produce software that is robust and will reliably handle expected and unexpected cases. Software that is scalable and can handle expected and somewhat unexpected load gracefully. With minimal operating costs and in the greenest way possible. Software that is observable and manageable and that can be evolved with changing and new functional requirements and with changing technology. Software that will be legacy in the original, positive meaning of the word. That does not depend on the one big brain in our team or on the guy that has been around for three decades. Software that we know is good and can comfortably be modified in a controlled and productive way.
This session talks about what it takes to create our code with honor. It discusses automation at every level in the build, rollout and monitoring of infrastructure (as code), platform and application, using CI/CD pipelines and DevOps procedures and tool. The session talks about testing – before and during development as well as after each change anywhere in the system and for both functional and non-functional aspects. Test driven development, regression testing and smoke testing are among the concepts discussed. The term ‘clean code’ refers to code that is readable, testable and maintainable. Through code analysis and peer reviews and by performing refactoring we constantly refine our software to be collectively adaptable.
As software developers, we have an obligation to society, to our peers and to ourselves to not only write software that does the job, but to create code that is good. Ours is a great and meaningful line of work, especially if we raise our game professionally to code with honor.
Benefits:
* feel the responsibility we IT professionals have
* understand how and why we frequently fail in the responsibility
* learn about the key aspects to apply to find the road to redemption
50 Shades of Data - from 0 and 1 to a rich data spectrum - RMOUG 2021 Trainin...Lucas Jellema
Data will always be the key ingredient in enterprise IT. The nature, scope and volume of data and the place of data in the IT landscape is evolving. BigData, unstructured data and non-relational data stored on Hadoop, in NoSQL databases and held in ElasticSearch, Caches and Message Queues and blockchain complements data in the enterprise RDBMS. Trends like IoT, microservices that contain their own data, streaming analytics, CQRS and Event Sourcing have changed the way we store, share, duplicate and govern data. This session introduces and demonstrates some of the most relevant patterns, technologies and hypes around storing, processing and retrieving data using products such as Oracle RDBMS, MySQL, Neo4J, Kafka, Redis, Elastic Search, Cassandra and Hadoop, Spark and yes SQL too - locally,in containers and on the cloud.
Summary:
Data has been and will be the key ingredient to enterprise IT. What is changing is the nature, scope and volume of data and the place of data in the IT architecture. BigData, unstructured data and non-relational data stored on Hadoop, in NoSQL databases and held in Elastic Search, Caches and Message Queues complements data in the enterprise RDBMS. Trends such as microservices that contain their own data, BASE, CQRS and Event Sourcing have changed the way we store, share and govern data. This session introduces patterns, technologies and hypes around storing, processing and retrieving data using products such as Oracle RDBMS, Cassandra, MySQL, Neo4J, Kafka, Redis, ElasticSearch and Hadoop/Spark -locally,in containers and on the cloud.
The rules for persisting and querying data are changing. Relational and ACID are no longer self evident, data consistency and integrity is far more relaxed and duplicating data in mulitiple places is quite acceptable. Databases are chosen, depending on the use case and looking at aspects such as agility and development productivity, scalability and performance, readily accessible expertise, cloud readiness and Total Cost of Ownership. Managing the data across multiple databases becomes an important challenges - prompting architects to implement CQRS, embrace event sourcing, consider blockchain and look at distributed technologies such as Apache Cassandra and Apache Kafka. This session discusses the new challenges, opportunities and approaches along with several demonstrations.
the session is aimed primarily at making architectural decisions: picking the right technology for the required capabilities and making the various components work together.
Benefits
- consider some potentially new data concepts
- learn about different types of data and data store
- open your mind to new patterns regarding data
Browser Automation with Playwright – for integration, RPA, UI testing and mor...Lucas Jellema
TL;DR – if you are a programmer and do any work at all with web browsers, this session can change your professional life
Anything a user can do in a browser can be automated. Tasks that are repetitive, involved or in need of a high degree of accuracy are prime candidate to be automated. UI testing is an example. Entering data into a web application – taken from a spreadsheet or even a second application – is another one. Collecting data or images from one or more websites into a daily report too. There is a long list of such tasks. And using Playwright it becomes easy to automate them.
Playwright is an open source library released in early 2020 by a team of engineers at Microsoft. The original library is based on NodeJS; recent editions are available in Go, C#, Python and Java. With Playwright we can create a browser instance in our program – WebKit, Chromium or Firefox. We can load websites and web applications into this browser and use them in a normal way. We also have full programmatic control over this browser. This means: we can read any aspect of the web application – the DOM and the JavaScript context as well as cookies, local storage and all network interactions. And not just read but manipulate as well. We can programmatically do all the things a human user can do – fill in fields, click on links, press buttons, hover over titles, save images, scroll the page. And we can programmatically do things a normal user cannot do: directly change the DOM, add and execute JavaScript, intercept network calls, read and write cookies and local storage.
Being able to create a simple program that can take over from a human – and can work faster, without tiring, 24/7, in parallel threads – opens up opportunities. To list just a few:
* Automated tests of web user interfaces – the core objective of the Playwright project
* Deeplink Bookmarks — navigate to a specific point in a web application with a fully prepared context, ready for user action
* Tactical integration: automation of data retrieval (“Screen Scraping”) and data entry
* Health Checks – continuous monitoring of the health of User Interfaces – if and how fast
* Automated Reporting – periodic gathering of data and images from web UIs
* Customized Web Application – tailor a SaaS application or 3rd party website to your need
* UI turned API — create an API to expose a function offered by a Web UI
* RPA — Robotic Process Automation: automated workflow across multiple systems, possibly a collaboration between human & robot
This meetup will let you discover Playwright and the many challenges it allows you to address. The first part focuses on what you can achieve and is not very technical. The second part is more on how you can do it and dives into code. The final part is where you run, change and create code yourself – using Playwright to take full control over a browser and all applications and sites that run inside the browser.
6Reinventing Oracle Systems in a Cloudy World (Sangam20, December 2020)Lucas Jellema
The cloud is changing many things. Even the decision to not (yet) adopt the cloud is one to make explicitly. Now is a time for any organization to reconsider the IT landscape. For each system, we should make a conscious ruling on its roadmap. The 6R model suggests six ways to move a system forward. This session uses the 6R model and applies it specifically to Oracle technology-based systems: what are the options and considerations for Oracle Database, Oracle Fusion Middleware, custom applications and other red components. What future should we consider and how do we choose? The paths chosen by several Oracle-heavy users is presented to illustrate these options and the decision making process. Oracle Cloud Infrastructure and Autonomous Database play a role, as do Azure IaaS and Azure Managed Database as well as on-premises systems. Latency, recovery, scalability, licenses, automation, lock-in, skills and resources all make their appearance.
Cloud native applications offer scalability, flexibility, and optimal use of compute resources. Serverless functions interacting through events, leveraging cloud capabilities for persistent storage and automated operations take organization to the next level in IT. This session demonstrates polyglot Functions interacting with native cloud services for events and persistence (Object Storage and NoSQL Database) and leveraging the Key and Secrets Vault, Monitoring and Notifications services for operational control. A lightweight API Gateway is used to expose APIs to external consumers. Infrastructure as Code is the guiding principle in deploying both cloud resources and application components, through OCI CLI and Terraform. This session leverages many cloud native (enabling) services in Oracle Cloud Infrastructure. The session will introduce concepts, then spend most of the time on live demonstrations. All sources are shared with the audience, to allow participants to create the same application in their own cloud tenancy.
What is so great about Cloud Native Applications? How do you create one? I will explain the first and demonstrate the second. On Oracle Cloud Infrastructure, using services that anyone can use for free, I will live create a cloud native application that streams, persists, notifies, scales, monitors
Steampipe - use SQL to retrieve data from cloud, platforms and files (Code Ca...Lucas Jellema
Introduction to Steampipe - a tool for retrieving data and metadata about cloud resources, platform resources and file content - all through SQL. Data from clouds, files and platforms can be joined, filtered, sorted, aggregated using regular SQL. Steampipe offers a very convenient way to get hold of data that describes the environment in detail.
Automation of Software Engineering with OCI DevOps Build and Deployment Pipel...Lucas Jellema
Automation of software delivery has several advantages. Prevention of human error is certainly one. Consistent and complete execution of tried and tested build and deployment tasks as the only way to apply changes in the live environment. Once the pipelines have been set up, the engineers can focus on the software and applying the required changes to it. To bring that software all the way to production is a breeze. Oracle Cloud Infrastructure offers the DevOps service, introduced in the Summer of 2021. This service comes with git style code repositories, build servers and build pipelines, artifact repositories as well as deployment pipelines. This session introduces OCI DevOps and demonstrates how software can be built and deployed on OKE Kubernetes, Compute Instance VMs and Oracle Functions. From simple source code an application is put in production without manual intervention in the build and deployment process.
Introducing Dapr.io - the open source personal assistant to microservices and...Lucas Jellema
Dapr.io is an open source product, originated from Microsoft and embraced by a broad coalition of cloud suppliers (part of CNFC) and open source projects. Dapr is a runtime framework that can support any application and that especially shines with distributed applications - for example microservices - that run in containers, spread over clouds and / or edge devices.
With Dapr you give an application a "sidecar" - a kind of personal assistant that takes care of all kinds of common responsibilities. Capturing and retrieving state, publishing and consuming messages or events. Reading secrets and configuration data. Shielding and load balancing over service endpoints. Calling and subscribing to all kinds of SaaS and PaaS facilities. Logging traces across all kinds of application components and logically routing calls between microservices and other application components. Dapr provides generic APIs to the application (HTTP and gRPC) for calling all these generic services – and provides implementations of these APIs for all public clouds and dozens of technology components. This means that your application can easily make use of a wide range of relevant features - with a strict separation between the language the application uses for this (generic, simple) and the configuration of the specific technology (e.g. Redis, MySQL, CosmosDB, Cassandra, PostgreSQL, Oracle Database, MongoDB, Azure SQL etc) that the Dapr sidecar uses. Changing technology does not affect the application, but affects the configuration of the Sidecar. Dapr can be used from applications in any technology - from Java and C#/.NET to Go, Python, Node, Rust and PHP. Or whatever can talk HTTP (or gRPC).
In this Code Café I will introduce you to Dapr.io. I will show you what Dapr can do for you (application) and how you can Dapr-izen an application. I'll show you how an asynchronously collaborative system of microservices - implemented in different technologies - can be easily connected to Dapr, first to Redis as a Pub/Sub mechanism and then also to Apache Kafka without modifications. Then we do - with the interested parties - also a hands-on in which you will apply Dapr yourself . In a short time you get a good feel for how you can use Dapr for different aspects of your applications. And if nothing else, Dapr is a very easy way to get your code with Kafka, S3, Redis, Azure EventGrid, HashiCorp Consul, Twillio, Pulsar, RabbitMQ, HashiCorp Vault, AWS Secret Manager, Azure KeyVault, Cron, SMTP, Twitter, AWS SQS & SNS, GCP Pub/Sub and dozens of other technology components talk.
How and Why you can and should Participate in Open Source Projects (AMIS, Sof...Lucas Jellema
For a long time I have been reluctant to actively contribute to an open source project. I thought it would be rather complicated and demanding – and that I didn't have the knowledge or skills for it or at the very least that they (the project team) weren't waiting for me.
In December 2021, I decided to have a serious input into the Dapr.io project – and now finally to determine how it works and whether it is really that complicated. In this session I want to tell you about my experiences. How Fork, Clone, Branch, Push (and PR) is the rhythm of contributing to an open source project and how you do that (these are all Git actions against GitHub repositories). How to learn how such a project functions and how to connect to it; which tools are needed, which communication channels are used. I tell how the standards of the project – largely automatically enforced – help me to become a better software engineer, with an eye for readability and testability of the code.
How the review process is quite exciting once you have offered your contribution. And how the final "merge to master" of my contribution and then the actual release (Dapr 1.6 contains my first contribution) are nice milestones.
I hope to motivate participants in this session to also take the step yourself and contribute to an open source project in the form of issues or samples, documentation or code. It's valuable to the community and the specific project and I think it's definitely a valuable experience for the "contributer". I looked up to it and now that I've done it gives me confidence – and it tastes like more (I could still use some help with the work on Dapr.io, by the way).
Microservices, Apache Kafka, Node, Dapr and more - Part Two (Fontys Hogeschoo...Lucas Jellema
Apache Kafka is one of the best known enterprise grade message brokers – created at LinkedIn, donated to the Apache software foundation and used in an ever growing number of organizations to provide a backbone for asynchronous communication. This session introduces Apache Kafka – history, concepts, community and tooling. In a hands on lab, participants will create topics, publish and consume messages and get a general feel for Kafka. Simple microservices are developed in NodeJS – publishing to and consuming from Apache Kafka.
Dapr.io has support for Apache Kafka. Using Kafka through Dapr is very straightforward as is explained and demonstrated and applied in a second handson lab – with applications in various programming languages. Participants will even be able to exchange events across their laptops – through a cloud based Kafka broker.
Use of Apache Kafka in several architecture patterns is discussed – such as data integration, microservices, CQRS, Event Sourcing – along with a number of real world use cases from several well known organizations. The Kafka Connector framework is introduced – a set of adapters that allow us to easily connect Kafka to sources and sinks – where respectively change events are captured from and messages are published to.
Bonus Lab: Apache Kafka is ran on Kubernetes as is Dapr.io. Multiple mutually interacting microservices are deployed on the same local Kubernetes cluster.
Microservices, Node, Dapr and more - Part One (Fontys Hogeschool, Spring 2022)Lucas Jellema
This session does a quick recap of microservices: why do we want them, what problems do they solve and what are the principles around designing and implementing them? The Dapr.io runtime framework for distributed applications is introduced. Dapr provides a sidecar (almost like a personal assistant to a manager) to an application or microservice, a companion process that handles common tasks such as storing and retrieving state, consuming and publishing messages and events, invoking external services and other microservices as well as handling incoming requests. Participants will do a handson lab with Dapr.io and learn how to quickly implement interactions with various technologies, including Redis and MySQL.
Node(JS) is introduced – a server side JavaScript-based programming language that can be used well for implementing microservices. Some of the main characteristics of NodeJS are discussed (functional programming, asynchronous flows, NPM package manager) as well as common use cases (handle incoming HTTP requests, invoke REST APIs). In the second lab, Node and Dapr are used together to implement microservices that interact with databases and message brokers and each other – in a decoupled fashion.
6Reinventing Oracle Systems in a Cloudy World (RMOUG Trainingdays, February 2...Lucas Jellema
The cloud is changing many things. Even the decision to not (yet) adopt cloud is one to make explicitly. Now is a time for any organization to reconsider the IT landscape. For each system we should make a conscious ruling on its roadmap. The 6R model suggests six ways to move a system forward.
This session uses the 6R model and applies it specifically to Oracle technology based systems: what are the options and considerations for Oracle Database, Oracle Fusion Middleware, custom applications, and other red components? What future should we consider and how do we choose? The paths chosen by several Oracle-heavy users is presented to illustrate these options and the decision making process. Oracle Cloud Infrastructure and Autonomous Database play a role, as do Azure IaaS and Azure Managed Database as well as on premises systems. Latency, recovery, scalability, licenses, automation, lock-in, skills, and resources all make their appearance.
Help me move away from Oracle! (RMOUG Training Days 2022, February 2022)Lucas Jellema
Organizations with decades of investment in Oracle technology sometimes (and increasingly) express a wish to move away from Oracle. In this session, we will first explore where the desire to move away from Oracle might come from. Then we describe what the term Oracle represents -- more than 2.000 products on all layers in the technology stack and in different business areas. Finally, we map out what the 'moving away from' consists of: defining where you 'move to' and subsequently actually going there.
It will become clear why you should give considerable thought about dropping Oracle, or any other vendors' technology, when you're not pleased with your current IT situation. You need to focus on the actual problems and objectives and define the suitable roadmap to fit your real needs. It turns out that the quest is usually for modernization and flexibility - and Oracle can very well be a part of that future.
DevOps is a term used in many places and unfortunately also to mean many different things. This presentation (largely in Dutch) paints the DevOps picture. While it may not give a clear cut definition (there does not seem to be one) it certainly makes clear what DevOps is about, what objectives and origins are and which factors enable and drive DevOps.
Conclusion Code Cafe - Microcks for Mocking and Testing Async APIs (January 2...Lucas Jellema
Microcks is a tool for API Mocking and Testing. In this presentation an overview of the support in Microcks for asynchronous APIs - the event publishing and consuming behavior of services and applications
Cloud native applications offer scalability, flexibility, and optimal use of compute resources. Serverless functions interacting through events, leveraging cloud capabilities for persistent storage and automated operations take organization to the next level in IT. This session demonstrates polyglot Functions interacting with native cloud services for events and persistence (Object Storage and NoSQL Database) and leveraging the Key and Secrets Vault, Monitoring and Notifications services for operational control. A lightweight API Gateway is used to expose APIs to external consumers. Infrastructure as Code is the guiding principle in deploying both cloud resources and application components, through OCI CLI and Terraform. This session leverages many cloud native (enabling) services in Oracle Cloud Infrastructure. The session will introduce concepts, then spend most of the time on live demonstrations. All sources are shared with the audience, to allow participants to create the same application in their own cloud tenancy. What is so great about Cloud Native Applications? How do you create one? I will explain the first and demonstrate the second. On Oracle Cloud Infrastructure, using services that anyone can use for free, I will live create a cloud native application that streams, persists, notifies, scales, monitors Benefits: - get to know many different OCI services - understand the meaning, purpose and benefits of cloud native development - learn how to take your own first steps in OCI - for free!
Software Engineering as the Next Level Up from Programming (Oracle Groundbrea...Lucas Jellema
Software engineering is programming with the added dimension of time: programs that can evolve and scale, be maintained and be operated by multiple people over a longer period of time. What does it take to do software engineering in a professional manner - beyond mere programming? As programmers, our main goal is to make IT work. To translate functional specification into executable code. And sure, that is the least we can do. But we have more responsibility than this. We have to produce software that is robust and will reliably handle expected and unexpected cases. Software that is scalable and can handle expected and somewhat unexpected load gracefully. With minimal operating costs and in the greenest way possible. Software that is observable and manageable and that can be evolved with changing and new functional requirements and with changing technology. Software that will be legacy in the original, positive meaning of the word. That does not depend on the one big brain in our team or on the guy that has been around for three decades. Software that we know is good and can comfortably be modified in a controlled and productive way. We have to grow from excellent programmers to professional software engineers. This session talks about what it takes to create our code with honor. It discusses automation at every level in the build, rollout and monitoring of infrastructure (as code), platform and application, using CI/CD pipelines and DevOps procedures and tools. The session talks about testing – before and during development as well as after each change anywhere in the system and for both functional and non-functional aspects. Test driven development, regression testing and smoke testing are among the concepts discussed. The term ‘clean code’ refers to code that is readable, testable and maintainable. Through code analysis and peer reviews and by performing refactoring we constantly refine our software to be collectively adaptable. The session demonstrates the concepts discussed with code samples in the context of cloud native programming. As software engineers, we have an obligation to society, to our peers and to ourselves to not only write software that does the job, but to create code that is good. Ours is a great and meaningful line of work, especially if we raise our game professionally to code with honor.
Triple C - Centralize, Cloudify and Consolidate Dozens of Oracle Databases (O...Lucas Jellema
Dozens of Oracle Databases - each health center location has one on its local server with the same data model and the same set of applications. These databases have to be centralized and cloudified and also be consolidated into one or as few databases as possible. To lower costs, ease operations and enable innovation. Each location can access only its own data, applications do not have to be changed and different locations can run different versions of applications and database objects. This is the story of a critical migration. About the cloud ready analysis, the Proofs of Concept with Oracle Database features VPD and Edition Based Redefinition, the scalability investigation, the redesign of change management, rollout and operational management processes and the careful modernization of a 25 year old platform on the latest database release and a shiny new, fully automated cloud platform.This is the story of an organization that had state of the art systems in the mid-90s. And they have these same systems today - no longer state of the art. They can keep the systems alive, but barely, and at increasing cost. In the Fall of 2020, we started an investigation into the feasibility of bringing the 100s of databases from each of the locations together, in a central location, in the cloud and finally: consolidated into one or at least as few database instances as possible. Using Oracle Database Virtual Private Database and Edition Based Redefinition, a smart database connection configuration in each site and a limited reimplementation of non-cloud/non-consolidated mechanisms (interaction with local file system for example) we have designed and proven a working new design and migration approach.
Who Wants to Become an IT Architect? A Look at the Bigger Picture (Oracle Gro...Lucas Jellema
The movie The Matrix made it clear: The Architect is powerful. How to be(come) and IT architect? What do you do, what do you need to know, is it fun and why? Using real world examples, core principles and useful tools, this session introduces the subtle art of designing and realizing flexible IT architectures. Taking a step back to get and create an overview, frequently asking why to get to the real intention, bringing aspects such as cost, scale, time and change and business strategy into the design and bridging the gap between business owners, process managers and technical specialists. One way to define the responsibility of an IT architect. In this session, we will discuss what is expected of the architect and what you need to do for that and what you could use to get it done. How do you get started as an architect, how to grow in that role? We discuss a number of real life architectural challenges and solution design. And discuss a number of architecture principles, patterns, and powers to apply. Never stop programming – but perhaps rise to the architecture challenge too.
Cloud native applications offer scalability, flexibility, and optimal use of compute resources. Serverless functions interacting through events, leveraging cloud capabilities for persistent storage and automated operations take organization to the next level in IT. This session demonstrates polyglot Functions interacting with native cloud services for events and persistence (Object Storage and NoSQL Database) and leveraging the Key and Secrets Vault, Monitoring and Notifications services for operational control. A lightweight API Gateway is used to expose APIs to external consumers. Infrastructure as Code is the guiding principle in deploying both cloud resources and application components, through OCI CLI and Terraform. This session leverages many cloud native (enabling) services in Oracle Cloud Infrastructure. The session will introduce concepts, then spend most of the time on live demonstrations. All sources are shared with the audience, to allow participants to create the same application in their own cloud tenancy.
What is so great about Cloud Native Applications? How do you create one? I will explain the first and demonstrate the second. On Oracle Cloud Infrastructure, using services that anyone can use for free, I will live create a cloud native application that streams, persists, notifies, scales, monitors
Code with Honor – on the importance and beauty of software programming - RMOU...Lucas Jellema
We want to be able to look our customer (and our mom) in the eye and state that we are proud of the software we have delivered. Because it is a high quality and lasting product. But can we really? Let’s discuss how to bring our profession to the next level.How to be a Professional Software Professional
Abstract
As programmers, our main goal is to make IT work. To translate functional specification into executable code. And sure, that is the least we can do. But we have more responsibility than this. We have to produce software that is robust and will reliably handle expected and unexpected cases. Software that is scalable and can handle expected and somewhat unexpected load gracefully. With minimal operating costs and in the greenest way possible. Software that is observable and manageable and that can be evolved with changing and new functional requirements and with changing technology. Software that will be legacy in the original, positive meaning of the word. That does not depend on the one big brain in our team or on the guy that has been around for three decades. Software that we know is good and can comfortably be modified in a controlled and productive way.
This session talks about what it takes to create our code with honor. It discusses automation at every level in the build, rollout and monitoring of infrastructure (as code), platform and application, using CI/CD pipelines and DevOps procedures and tool. The session talks about testing – before and during development as well as after each change anywhere in the system and for both functional and non-functional aspects. Test driven development, regression testing and smoke testing are among the concepts discussed. The term ‘clean code’ refers to code that is readable, testable and maintainable. Through code analysis and peer reviews and by performing refactoring we constantly refine our software to be collectively adaptable.
As software developers, we have an obligation to society, to our peers and to ourselves to not only write software that does the job, but to create code that is good. Ours is a great and meaningful line of work, especially if we raise our game professionally to code with honor.
Benefits:
* feel the responsibility we IT professionals have
* understand how and why we frequently fail in the responsibility
* learn about the key aspects to apply to find the road to redemption
50 Shades of Data - from 0 and 1 to a rich data spectrum - RMOUG 2021 Trainin...Lucas Jellema
Data will always be the key ingredient in enterprise IT. The nature, scope and volume of data and the place of data in the IT landscape is evolving. BigData, unstructured data and non-relational data stored on Hadoop, in NoSQL databases and held in ElasticSearch, Caches and Message Queues and blockchain complements data in the enterprise RDBMS. Trends like IoT, microservices that contain their own data, streaming analytics, CQRS and Event Sourcing have changed the way we store, share, duplicate and govern data. This session introduces and demonstrates some of the most relevant patterns, technologies and hypes around storing, processing and retrieving data using products such as Oracle RDBMS, MySQL, Neo4J, Kafka, Redis, Elastic Search, Cassandra and Hadoop, Spark and yes SQL too - locally,in containers and on the cloud.
Summary:
Data has been and will be the key ingredient to enterprise IT. What is changing is the nature, scope and volume of data and the place of data in the IT architecture. BigData, unstructured data and non-relational data stored on Hadoop, in NoSQL databases and held in Elastic Search, Caches and Message Queues complements data in the enterprise RDBMS. Trends such as microservices that contain their own data, BASE, CQRS and Event Sourcing have changed the way we store, share and govern data. This session introduces patterns, technologies and hypes around storing, processing and retrieving data using products such as Oracle RDBMS, Cassandra, MySQL, Neo4J, Kafka, Redis, ElasticSearch and Hadoop/Spark -locally,in containers and on the cloud.
The rules for persisting and querying data are changing. Relational and ACID are no longer self evident, data consistency and integrity is far more relaxed and duplicating data in mulitiple places is quite acceptable. Databases are chosen, depending on the use case and looking at aspects such as agility and development productivity, scalability and performance, readily accessible expertise, cloud readiness and Total Cost of Ownership. Managing the data across multiple databases becomes an important challenges - prompting architects to implement CQRS, embrace event sourcing, consider blockchain and look at distributed technologies such as Apache Cassandra and Apache Kafka. This session discusses the new challenges, opportunities and approaches along with several demonstrations.
the session is aimed primarily at making architectural decisions: picking the right technology for the required capabilities and making the various components work together.
Benefits
- consider some potentially new data concepts
- learn about different types of data and data store
- open your mind to new patterns regarding data
Browser Automation with Playwright – for integration, RPA, UI testing and mor...Lucas Jellema
TL;DR – if you are a programmer and do any work at all with web browsers, this session can change your professional life
Anything a user can do in a browser can be automated. Tasks that are repetitive, involved or in need of a high degree of accuracy are prime candidate to be automated. UI testing is an example. Entering data into a web application – taken from a spreadsheet or even a second application – is another one. Collecting data or images from one or more websites into a daily report too. There is a long list of such tasks. And using Playwright it becomes easy to automate them.
Playwright is an open source library released in early 2020 by a team of engineers at Microsoft. The original library is based on NodeJS; recent editions are available in Go, C#, Python and Java. With Playwright we can create a browser instance in our program – WebKit, Chromium or Firefox. We can load websites and web applications into this browser and use them in a normal way. We also have full programmatic control over this browser. This means: we can read any aspect of the web application – the DOM and the JavaScript context as well as cookies, local storage and all network interactions. And not just read but manipulate as well. We can programmatically do all the things a human user can do – fill in fields, click on links, press buttons, hover over titles, save images, scroll the page. And we can programmatically do things a normal user cannot do: directly change the DOM, add and execute JavaScript, intercept network calls, read and write cookies and local storage.
Being able to create a simple program that can take over from a human – and can work faster, without tiring, 24/7, in parallel threads – opens up opportunities. To list just a few:
* Automated tests of web user interfaces – the core objective of the Playwright project
* Deeplink Bookmarks — navigate to a specific point in a web application with a fully prepared context, ready for user action
* Tactical integration: automation of data retrieval (“Screen Scraping”) and data entry
* Health Checks – continuous monitoring of the health of User Interfaces – if and how fast
* Automated Reporting – periodic gathering of data and images from web UIs
* Customized Web Application – tailor a SaaS application or 3rd party website to your need
* UI turned API — create an API to expose a function offered by a Web UI
* RPA — Robotic Process Automation: automated workflow across multiple systems, possibly a collaboration between human & robot
This meetup will let you discover Playwright and the many challenges it allows you to address. The first part focuses on what you can achieve and is not very technical. The second part is more on how you can do it and dives into code. The final part is where you run, change and create code yourself – using Playwright to take full control over a browser and all applications and sites that run inside the browser.
6Reinventing Oracle Systems in a Cloudy World (Sangam20, December 2020)Lucas Jellema
The cloud is changing many things. Even the decision to not (yet) adopt the cloud is one to make explicitly. Now is a time for any organization to reconsider the IT landscape. For each system, we should make a conscious ruling on its roadmap. The 6R model suggests six ways to move a system forward. This session uses the 6R model and applies it specifically to Oracle technology-based systems: what are the options and considerations for Oracle Database, Oracle Fusion Middleware, custom applications and other red components. What future should we consider and how do we choose? The paths chosen by several Oracle-heavy users is presented to illustrate these options and the decision making process. Oracle Cloud Infrastructure and Autonomous Database play a role, as do Azure IaaS and Azure Managed Database as well as on-premises systems. Latency, recovery, scalability, licenses, automation, lock-in, skills and resources all make their appearance.
Cloud native applications offer scalability, flexibility, and optimal use of compute resources. Serverless functions interacting through events, leveraging cloud capabilities for persistent storage and automated operations take organization to the next level in IT. This session demonstrates polyglot Functions interacting with native cloud services for events and persistence (Object Storage and NoSQL Database) and leveraging the Key and Secrets Vault, Monitoring and Notifications services for operational control. A lightweight API Gateway is used to expose APIs to external consumers. Infrastructure as Code is the guiding principle in deploying both cloud resources and application components, through OCI CLI and Terraform. This session leverages many cloud native (enabling) services in Oracle Cloud Infrastructure. The session will introduce concepts, then spend most of the time on live demonstrations. All sources are shared with the audience, to allow participants to create the same application in their own cloud tenancy.
What is so great about Cloud Native Applications? How do you create one? I will explain the first and demonstrate the second. On Oracle Cloud Infrastructure, using services that anyone can use for free, I will live create a cloud native application that streams, persists, notifies, scales, monitors
4. Classificatie: vertrouwelijk
Waarom is 11 + 11 gelijk aan 22?
11 = 1 x + 1 x
10 1
11 + 11 = 1 x + 1 x
10 1 1 x + 1 x
10 1
+
AMIS Open Dag 2022 - Binair Rekenen 4
1
1000
5. Classificatie: vertrouwelijk
Waarom is 11 + 11 gelijk aan 22?
11 = 1 x + 1 x
10 1
11 + 11 = 1 x + 1 x
10 1 1 x + 1 x
10 1
+
11 + 11 = 10 1
10 1
11 + 11 = 2 x + 2 x
10 1 = 22
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6. Classificatie: vertrouwelijk
Tientallig of decimaal stelsel
1
11 = 1 x + 1 x
10 1
10000
Iedere positie in een decimaal getal
staat voor een “macht van 10”
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7. Classificatie: vertrouwelijk
Tientallig of decimaal stelsel
1
11 = 1 x + 1 x
10 1
10000
Iedere positie in een decimaal getal
staat voor een “macht van 10”
2174 = + 7 x + 4 x
+ 1 x
2 x
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8. Classificatie: vertrouwelijk
Tientallig of decimaal stelsel
1
10000
2174 = 10 1
100
1000 + 7 x + 4 x
+ 1 x
2 x
1000
1000
100 10
10
10
10
10
10 10
1
1
1
1
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20. Classificatie: vertrouwelijk
Tweetallig stelsel (binair)
• Iedere positie kan twee waarden hebben in plaats van de tien decimale waarden
• Een getal ziet eruit als: 10010
• of:
• of:
• of:
• of:
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21. Classificatie: vertrouwelijk
Tweetallig stelsel (binair)
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1
16
Iedere positie in een binair getal
staat voor een “macht van 2”
1011 = + 1 x + 1 x
+ 0 x
1 x
2 1
8
1011 (binair ) = 11 (decimaal)
25. Classificatie: vertrouwelijk
Komen die aantallen bekend voor?
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1
16
16 1
Finale
Halve
Finale
Kwart
Finale
Achtste
Finale
39. Classificatie: vertrouwelijk
Hoe kan je tot meer dan 2000 tellen?
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1023 512
256
128
64
32
16
8
4
2
1
----
(+
1023
40. Classificatie: vertrouwelijk
Hoe kan je tot meer dan 2000 tellen?
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1023
1024
0
512
256
128
64
32
16
8
4
2
1
----
(+
1023
41. Classificatie: vertrouwelijk
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1024
1023
binair: 11111111111 (11 enen – tien vingers en een tong)
1024
512
256
128
64
32
16
8
4
2
1
----
(+
2047
42. Classificatie: vertrouwelijk
Zelf oefenen
• Hoeveel is 10 + 11
• in het decimale (tientallig) stelsel
• in het binaire (tweetallig) stelsel
• in het octale (achttallig) stelsel
• Schrijf deze som in het binair stelsel – en reken uit: 7 + 9
• Hoeveel is het binaire getal 10110 in het decimale stelsel?
• Welk getal geeft deze hand aan? Eerst binair dan decimaal
• Wat is het grootste getal dat je met één hand (vijf vingers) kunt aangeven?
• Met de letters van ons alfabet kunnen we een 26-tallig stelsel maken
• Hoeveel is in het 26-tallig stelsel: EBA + AHC ? En LOL + LOL?
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Editor's Notes
10 + 11 = 21 (decimaal), 101 (binair) en 101 (octaal)
7 + 9 binair = 0111 + 1001 = 10000 (1 x 16 decimaal)
binair 10110 = 1 x 16 + 1 x 4 + 1 x 2 = 22 (decimaal)
de hand is binair 11010 = 1 x 16 + 1 x8 + 1 x 2 = 26
grootste getal met 1 hand = 11111 = 1 x 16 + 1 x 8 + 1 x 4 + 1 x 2 + 1 x 1= 31
EBA (521) + AHC (183) = FJD (6 x 26 x 26 + 10 x 26 + 4) ; LOL (12 x 26 x 26 + 15 x 26 + 12) + LOL = Y D X (25 x 26 x 26 + 4 x 26 + 24)