Copenhagen ruby brigade november 2018

•

0 likes•38 views

Anders Lemke

I gave this talk at the Copenhagen Ruby Brigade meetup in november 2018.

Software

EVENTS ON RAILSEVENTS ON RAILS
Applied Event Sourcing, Domain-Driven Design and CQRS
by Anders Lemke
Platform Architect and Lead Engineer at Zetland
1

DOMAIN EVENTDOMAIN EVENT
Something happened, that somebody cares about
9

class Editor::StoryPublished < DomainEvent
attribute :story_content
attribute :story_id
attribute :user_id
end
10

EVENT SOURCINGEVENT SOURCING
The authoritative source of truth is an
append-only stream of immutable events
14

. This happened
2. then, this happened
3. then, this happened
4. ...
15

# In aggregate_repository.rb
def build(aggregate_class, aggregate_id)
aggregate = aggregate_class.new(aggregate_id)
events = EventStore.load_events(
aggregate_class,
aggregate_id
)
aggregate.rebuild(events)
end
20

# In editor/story.rb
def apply_story_revision_created(event)
@story_content = event.story_content
end
22

# In editor/story.rb
def publish(user_id:)
return unless reviewed?
apply Editor::StoryPublished.new(
user_id: user_id,
story_id: @story_id,
story_content: @story_content,
)
end
24

# In editor/story.rb
def apply_story_published(event)
@status = :published
end
25

# In command_handler.rb
EventStore.store_events(
aggregate_class,
aggregate_id,
aggregate.unpublished_events
)
27

CQRSCQRS
(Command Query Responsibility Segregation)
31

✍ A story is something you edit (Editor)
35

✍ A story is something you edit (Editor)
A story is something you consume (Consume)
35

✍ A story is something you edit (Editor)
A story is something you consume (Consume)
A story is something you count (Internal reporting)
35

✍ A story is something you edit (Editor)
A story is something you consume (Consume)
A story is something you count (Internal reporting)
A story is something you discover (Discover)
35

Consume: A row for members
when Editor::StoryPublished
Consume::Story.create(
story_id: event.story_id,
story_content: event.story_content
)
37

class Editor::StoryPublished < DomainEvent
attribute :story_content
attribute :story_id
attribute :user_id
end
43

class Identity::NameChanged < DomainEvent
attribute :new_name
attribute :user_id
end
51

Decouple data change from data usage
55 . 1

UBIQUITOUS LANGUAGEUBIQUITOUS LANGUAGE
59

story_revision_created.rb
story_approved_for_publishing.rb
story_published.rb
story_scheduled_for_publishing.rb
story_scheduling_cancelled.rb
story_sent_to_followers.rb
story_sent_via_push.rb
story_deleted.rb
story_unpublished.rb
62

CHALLENGESCHALLENGES
Added complexity at high level
64

CHALLENGESCHALLENGES
Added complexity at high level
Write some new Rails generators
64

CHALLENGESCHALLENGES
Added complexity at high level
Write some new Rails generators
Relearn to design software
64

CHALLENGESCHALLENGES
Added complexity at high level
Write some new Rails generators
Relearn to design software
Eventual consistency
64

CHALLENGESCHALLENGES
Added complexity at high level
Write some new Rails generators
Relearn to design software
Eventual consistency
Evolving events over time
64

STANDING ON THE SHOULDERS OFSTANDING ON THE SHOULDERS OF
Eric Evans
Domain-Driven Design
Bounded context
Ubiquitous Language
Greg Young
Event Sourcing
CQRS
Alberto Brandolini
Event Storming
65

READREAD
by
by
Turning the database inside-out with Apache Samza Martin
Klepmann
Introducing Event Storming Alberto Brandolini
Vaughn Vernon - Rethinking Legacy and Monolithic Systems
66

Only design simple facts
Decouple data change from data usage
Behaviour over structure
Ubiquitous Language
71

THANK YOUTHANK YOU
20 44 21 27
anders@zetland.dk
72

What's hot

ES and CQRS workshop

Zeldal Ozdemir

KEDA Overview

Jeff Hollan

In Kubernetes, operators allow the API to be extended to your heart content. If one task requires too much YAML, it’s easy to create an operator to take care of the repetitive cruft, and only require a minimum amount of YAML. On the other hand, since its beginnings, the Go language has been advertised as closer to the hardware, and is now ubiquitous in low-level programming. Kubernetes has been rewritten from Java to Go, and its whole ecosystem revolves around Go. For that reason, It’s only natural that Kubernetes provides a Go-based framework to create your own operator. While it makes sense, it requires organizations willing to go down this road to have Go developers, and/or train their teams in Go. While perfectly acceptable, this is not the only option. In fact, since Kubernetes is based on REST, why settle for Go and not use your own favorite language? In this talk, I’ll describe what is an operator, how they work, how to design one, and finally demo a Java-based operator that is as good as a Go one.

Java.IL - Your own Kubernetes controller, not only in Go!

Nicolas Fränkel

In Kubernetes, operators allow the API to be extended to your heart content. If one task requires too much YAML, it’s easy to create an operator to take care of the repetitive cruft, and only require a minimum amount of YAML. On the other hand, since its beginnings, the Go language has been advertised as closer to the hardware, and is now ubiquitous in low-level programming. Kubernetes has been rewritten from Java to Go, and its whole ecosystem revolves around Go. For that reason, It’s only natural that Kubernetes provides a Go-based framework to create your own operator. While it makes sense, it requires organizations willing to go down this road to have Go developers, and/or train their teams in Go. While perfectly acceptable, this is not the only option. In fact, since Kubernetes is based on REST, why settle for Go and not use your own favourite language? In this talk, I will describe what an operator is, how they work, how to design one, and finally demo a Java-based operator that is as good as a Go one.

OSCONF - Your own Kubernetes controller: not only in Go

Nicolas Fränkel

much YAML, it’s easy to create an operator to take care of the repetitive cruft, and only require a minimum amount of YAML. On the other hand, since its beginnings, the Go language has been advertised as closer to the hardware, and is now ubiquitous in low-level programming. Kubernetes has been rewritten from Java to Go, and its whole ecosystem revolves around Go. For that reason, It’s only natural that Kubernetes provides a Go-based framework to create your own operator. While it makes sense, it requires organizations willing to go down this road to have Go developers, and/or train their teams in Go. While perfectly acceptable, this is not the only option. In fact, since Kubernetes is based on REST, why settle for Go and not use your own favorite language? In this talk, I’ll describe what is an operator, how they work, how to design one, and finally demo a Java-based operator that is as good as a Go one.

Config Management Camp - Your own Kubernetes controller, not only in Go

Nicolas Fränkel

kubernates and micro-services

Megha Sahu

Kubernetes has many ways to scale your workloads, most of what we hear about is scaling our cluster up with either with vm sets or autoscaling groups. There is another way, in this talk we will look at virtual kubelet. Virual Kubelet will allow us to talk to a cloud providers container as a service platform like ACI, fargate or ECI. We will deep dive into how you can scale your applications across virtual kubelet. One issue is the kubernetes service type has is scaling to zero due to the way routing to the pod happens if there is no pod for the service to route too. Scaling our applications to zero is just as important and scaling up. We will look at projects that integrate with the horizontal pod autoscaler that fix this issue. Allowing us to not only scale our applications up but as easily down to make our cluster truly elastic.

KubeCon 2019 - Scaling your cluster (both ways)

Patrick Chanezon

Cncf event driven autoscaling with keda

JurajHantk

Cloud native applications are composed of containers, serverless functions and managed cloud services. What is the best set of tools on your desktop to provide a rapid, iterative development experience and package applications using these three components? This hand-on talk will explain how you can complement Docker Desktop, with it’s local Docker engine and Kubernetes cluster, with open source tools such as the Virtual Kubelet, Open Service Broker, the Gloo hybrid app gateway, Draft, and others, to build the most productive development inner-loop for these type of applications. It will also cover how you can use the Cloud Native Application Bundle (CNAB) format and it’s implementation in the Docker app experimental tool to package your application and manage it with container supply chain tooling such as Docker Hub.

Dockercon 2019 Developing Apps with Containers, Functions and Cloud Services

Patrick Chanezon

What's hot (9)

ES and CQRS workshop

KEDA Overview

Java.IL - Your own Kubernetes controller, not only in Go!

OSCONF - Your own Kubernetes controller: not only in Go

Config Management Camp - Your own Kubernetes controller, not only in Go

kubernates and micro-services

KubeCon 2019 - Scaling your cluster (both ways)

Cncf event driven autoscaling with keda

Dockercon 2019 Developing Apps with Containers, Functions and Cloud Services

Similar to Copenhagen ruby brigade november 2018

Microservices DevOps on Google Cloud Platform

Sunnyvale

Lowering the Barrier to Stream Processing With Alex Morley | Current 2022 Providing an easy way for developers to use event streams without having to learn all the complexity of how to build a streaming application from scratch was key to the adoption of an event-driven architecture at Babylon. Java/Scala engineers could be well catered for by KStreams and the like. But we wanted a super simple way for all of our python developers to be able write code that does super simple things (like: react to an event, do some processing and then optionally output some more events). They should only have to write a single (typed) function, and not have to worry about consumers, producers, serdes or any other things that us Kafka-folk love to harp on about. We found that by using the ""agent"" concept in faust we could provide our engineers with a ""Function as a Service""-like experience specifically for processing events on Kafka streams. By ruthlessly focussing on the developer experience we massively increased the number of developers using the data streams available at Babylon and reduced the time to deployment for a new stream processing app by an order of magnitude.

Lowering the Barrier to Stream Processing With Alex Morley | Current 2022

HostedbyConfluent

Build, Publish, Deploy and Test Docker images and containers with Jenkins Wor...

Docker, Inc.

In this talk we share our experiences developing and deploying a microservices-based application. You will learn about the distributed data management challenges that arise in a microservices architecture. We will describe how we solved them using event sourcing to reliably publish events that drive eventually consistent workflows and pdate CQRS-based views. You will also learn how we build and deploy the application using a Jenkins-based deployment pipeline that creates Docker images that run on Amazon EC2.

Building and deploying microservices with event sourcing, CQRS and Docker (Me...

Chris Richardson

As more workloads move to severless-like environments, the importance of properly handling downscaling increases. While recomputing the entire RDD makes sense for dealing with machine failure, if your nodes are more being removed frequently, you can end up in a seemingly loop-like scenario, where you scale down and need to recompute the expensive part of your computation, scale back up, and then need to scale back down again. Even if you aren’t in a serverless-like environment, preemptable or spot instances can encounter similar issues with large decreases in workers, potentially triggering large recomputes. In this talk, we explore approaches for improving the scale-down experience on open source cluster managers, such as Yarn and Kubernetes-everything from how to schedule jobs to location of blocks and their impact (shuffle and otherwise).

Improving Apache Spark Downscaling

Databricks

BlackBerry10 apps with Adobe AIR & Apache Flex - BlackBerry JAM Europe

Mariano Carrizo

The Possibilities and Pitfalls of Writing Your Own State Stores. Building an event-driven system will inevitably lead you to exposing your data through APIs to make your data accessible to non-streaming solutions. At first glance, Kafka Streams provides statestores which we could use to build our APIs directly onto Kafka. But all store implementations are key/value based which is fine when you only retrieve information by key. API’s however require a bit more “searchability”. Writing your own state store is certainly possible, but it is challenging. At KOR, we went through this process and implemented a state store on top of Nitrite Database, an embedded document database. This allows you not only to retrieve your documents using a key, but also to search through the values in the store using a MongoDB-like API. On the surface, state stores seem straightforward, but the devil is certainly in the details. How does partitioning fit into this story and how do you make sure everything keeps running smooth, even after restarting or scaling your applications? We made the project open source for everyone out there wanting to try this approach, but most of all we want to tell you about the dragons we encountered. Join me in a journey of ups and downs that starts with a simple requirement (host an API), through implementing a custom state store and finishes off by describing the challenges we encountered getting our APIs deployed. Don’t expect all “roses and sunshine”. While hosting APIs on Kafka is possible, there are some consequences that we just couldn’t overcome … yet.

The Possibilities and Pitfalls of Writing Your Own State Stores with Daan Gertis

HostedbyConfluent

Openobject bi

openerpwiki

DDD meets CQRS and event sourcing

Gottfried Szing

This presentation was featured on the third AngularJS Meetup in Belgium and presented by Glenn Dejaeger, Thomas Anciaux and Pieter Herroelen, who have been working on a large AngularJS application for almost a year now. This presentation features the many challenges they have encountered and also ways to solve them, including: - structuring a large AngularJS application (and building it with grunt) - writing reusable components - using AngularJS with a hypermedia API Enjoy! AE nv

AngularJS in large applications - AE NV

AE - architects for business and ict

Building Microservices with Scala, functional domain models and Spring Boot -...

JAXLondon2014

In this talk you will learn about a modern way of designing applications that’s very different from the traditional approach of building monolithic applications that persist mutable domain objects in a relational database.We will talk about the microservice architecture, it’s benefits and drawbacks and how Spring Boot can help. You will learn about implementing business logic using functional, immutable domain models written in Scala. We will describe event sourcing and how it’s an extremely useful persistence mechanism for persisting functional domain objects in a microservices architecture.

#JaxLondon: Building microservices with Scala, functional domain models and S...

Chris Richardson

BASTA! 2017, Mainz: Talk von Mario-Leander Reimer (@LeanderReimer, Cheftechnologe bei QAware). Cloud-Größen wie Google, Twitter und Netflix haben die Kernbausteine ihrer Infrastruktur quelloffen verfügbar gemacht. Das Resultat aus vielen Jahren Cloud-Erfahrung ist nun frei zugänglich, und jeder kann seine eigenen Cloud-nativen Anwendungen entwickeln – Anwendungen, die in der Cloud zuverlässig laufen und fast beliebig skalieren. Die einzelnen Bausteine wachsen zu einem großen Ganzen zusammen, dem Cloud-Native-Stack. In dieser Session stellen wir die wichtigsten Konzepte und aktuellen Schlüsseltechnologien kurz vor. Anschließend implementieren wir einen einfachen Microservice mit .NET Core und Steeltoe OSS und bringen ihn zusammen mit ausgewählten Bausteinen für Service-Discovery und Konfiguration schrittweise auf einem Kubernetes-Cluster zum Laufen.

Cloud-native .NET Microservices mit Kubernetes

QAware GmbH

Building and deploying microservices with event sourcing, CQRS and Docker (Ha...

Chris Richardson

These are the slides of my talk at iOSCon 2017: https://skillsmatter.com/skillscasts/9549-architecting-alive-apps Our apps are ever more alive. They interact with the rest of the world talking to backends and receiving notifications from them. They get their input from us and from other sensors. They are even aware of the location of the device they run in, or its position. But, in our IoT world, they may also detect presence in a room, get the temperature of it, or change the color of its lights. Sadly enough, many of the apps available today with those capabilities have some architectural limitations: Many of them are written in a way that is really dependent on a specific hardware. Some restrict their use cases to whatever is provided by the hardware devices. And almost all of them expect having a connection with the real device as the only way to test if they work properly. However, we can also use an advanced architecture, like the Clean Architecture, to create a beautiful, scalable, testable, and robust application. Join Jorge and he will share with you how you can do it! This is a "Code or it didn't happen" (TM) talk.

Architecting Alive Apps

Jorge Ortiz

Big Data Tools in AWS

Shu-Jeng Hsieh

Viewing a 3D model on a webpage or in a mobile app is really cool, but visualizing design data isn’t just about meshes and textures. In this class Philippe Leefsma of Autodesk will show you how the Forge Model Derivative API and JavaScript viewer give you access to the valuable data associated with each model component that is extracted from the original design file. We will take that a step further and connect those models to an external database to add even richer data. Finally, we will stylize the model to turn a model into a powerful, intuitive reporting tool.

Forge - DevCon 2016: Visual Reporting with Connected Design Data

Autodesk

Developing and deploying applications with Spring Boot and Docker (@oakjug)

Chris Richardson

Container Deployment and Management with kubernetes

siuyin

You must have noticed how Docker and containers is playing a more and more important part in .NET development. Docker support is everywhere, so it should be easy to build solutions based on container technology, right? But, it takes a bit more to architect and create a .NET solution that use Docker at its core. Many questions arise: How do you design a solution architecture that fits well with containers? Would I use .NET or .NET Core? What is a proper way to migrate to such an architecture? What changes in the .NET implementation from pre-Docker solutions with micro-services? Where do container orchestrators fit in and how do I build and deploy my solutions on a Docker container cluster, such as Azure Kubernetes Service? These and many other questions will be answered in this session. You will learn how to design and architect your .NET solutions and get a flying start to create, build and run Docker-based containerized applications.

.NET Fest 2019. Alex Thissen. Architecting .NET solutions in a Docker ecosystem

NETFest

Similar to Copenhagen ruby brigade november 2018 (20)

Microservices DevOps on Google Cloud Platform

Lowering the Barrier to Stream Processing With Alex Morley | Current 2022

Build, Publish, Deploy and Test Docker images and containers with Jenkins Wor...

Building and deploying microservices with event sourcing, CQRS and Docker (Me...

Improving Apache Spark Downscaling

BlackBerry10 apps with Adobe AIR & Apache Flex - BlackBerry JAM Europe

The Possibilities and Pitfalls of Writing Your Own State Stores with Daan Gertis

Openobject bi

DDD meets CQRS and event sourcing

AngularJS in large applications - AE NV

Building Microservices with Scala, functional domain models and Spring Boot -...

#JaxLondon: Building microservices with Scala, functional domain models and S...

Cloud-native .NET Microservices mit Kubernetes

Building and deploying microservices with event sourcing, CQRS and Docker (Ha...

Architecting Alive Apps

Big Data Tools in AWS

Forge - DevCon 2016: Visual Reporting with Connected Design Data

Developing and deploying applications with Spring Boot and Docker (@oakjug)

Container Deployment and Management with kubernetes

.NET Fest 2019. Alex Thissen. Architecting .NET solutions in a Docker ecosystem

Recently uploaded

Abortion Pills In Pretoria ](+27832195400*)[ 🏥 Women's Abortion Clinic In Pretoria ● Abortion Pills For Sale In Pretoria ● Pretoria 🏥🚑!! Abortion Clinic Near Me Cost, Price, Women's Clinic Near Me, Abortion Clinic Near, Abortion Doctors Near me, Abortion Services Near Me, Abortion Pills Over The Counter, Abortion Pill Doctors' Offices, Abortion Clinics, Abortion Places Near Me, Cheap Abortion Places Near Me, Medical Abortion & Surgical Abortion, approved cyctotec pills and womb cleaning pills too plus all the instructions needed This Discrete women’s Termination Clinic offers same day services that are safe and pain free, we use approved pills and we clean the womb so that no side effects are present. Our main goal is that of preventing unintended pregnancies and unwanted births every day to enable more women to have children by choice, not chance. We offer Terminations by Pill and The Morning After Pill.” Our Private VIP Abortion Service offers the ultimate in privacy, efficiency and discretion. we do safe and same day termination and we do also womb cleaning as well its done from 1 week up to 28 weeks. We do delivery of our services world wide SAFE ABORTION CLINICS/PILLS ON SALE WE DO DELIVERY OF PILLS ALSO Abortion clinic at very low costs, 100% Guaranteed and it’s safe, pain free and a same day service. It Is A 45 Minutes Procedure, we use tested abortion pills and we do womb cleaning as well. Alternatively the medical abortion pill and womb cleansing !!!

Abortion Pills In Pretoria ](+27832195400*)[ 🏥 Women's Abortion Clinic In Pre...

Medical / Health Care (+971588192166) Mifepristone and Misoprostol tablets 200mg

WSO2CON2024 - It's time to go Platformless

WSO2

%in kaalfontein+277-882-255-28 abortion pills for sale in kaalfontein

masabamasaba

Abortion Pill Prices Tembisa [(+27832195400*)] 🏥 Women's Abortion Clinic in Tembisa ● Abortion Pills For Sale in Tembisa ● Tembisa 🏥🚑!! Abortion Clinic Near Me Cost, Price, Women's Clinic Near Me, Abortion Clinic Near, Abortion Doctors Near me, Abortion Services Near Me, Abortion Pills Over The Counter, Abortion Pill Doctors' Offices, Abortion Clinics, Abortion Places Near Me, Cheap Abortion Places Near Me, Medical Abortion & Surgical Abortion, approved cyctotec pills and womb cleaning pills too plus all the instructions needed This Discrete women’s Termination Clinic offers same day services that are safe and pain free, we use approved pills and we clean the womb so that no side effects are present. Our main goal is that of preventing unintended pregnancies and unwanted births every day to enable more women to have children by choice, not chance. We offer Terminations by Pill and The Morning After Pill.” Our Private VIP Abortion Service offers the ultimate in privacy, efficiency and discretion. we do safe and same day termination and we do also womb cleaning as well its done from 1 week up to 28 weeks. We do delivery of our services world wide SAFE ABORTION CLINICS/PILLS ON SALE WE DO DELIVERY OF PILLS ALSO Abortion clinic at very low costs, 100% Guaranteed and it’s safe, pain free and a same day service. It Is A 45 Minutes Procedure, we use tested abortion pills and we do womb cleaning as well. Alternatively the medical abortion pill and womb cleansing !!!

Abortion Pill Prices Tembisa [(+27832195400*)] 🏥 Women's Abortion Clinic in T...

Medical / Health Care (+971588192166) Mifepristone and Misoprostol tablets 200mg

%in Soweto+277-882-255-28 abortion pills for sale in soweto

masabamasaba

We specialize in Psychic Readings, Psychic Love Spells, Binding Love Spells, Obsession Spells, Voodoo Spells, Lottery Spells, Marriage Spells, Black Magic Spells, Palm Readings & much more. Are you depressed? We perform this come-to-me love spell that works instantly with the aim of bringing back the victim to the person performing the magic. Have you lost your lover? We perform this come-to-me love spell that works instantly with the aim of bringing back the victim to the person performing the magic. Have you lost your lover? Do u need to solve any relationship problem? Contact the powerful spells caster chief kule with love spells that work overnight and love spells that really work. Have you found yourself infatuated with a special someone you think could be the one? Are you looking for a spell to provide them with a nudge in the right direction? Or maybe the spell you cast didn’t achieve the results you were hoping for? Whether you’re new or versed in the ways of spell casting, we’re here to help. Today we’re going to provide you with a detailed guide on the types of love spells to cast. Not only that but there’s something for those who wish to find outside advice from more advanced spell casters. We’re also going to provide you with the top sites available to help you with your dilemma. Let’s begin our journey by educating ourselves on love magic and what a real love caster looks like. Love Magic and Love Casters Love magic made its first appearance back in Ancient Egypt and has been an active practice since. This type of magic is a branch of traditional magic and can be practiced in various ways. Typically the more common use of love magic is through the work of spells, but other methods look like Charms Rituals-LOVE Potions-Dolls and even Amulets If you are interested in becoming a love caster, be prepared for what’s to come. A genuine love caster knows that the art of love casting is no easy feat and shouldn’t be done casually. You should know that not only does it require you to be gifted spiritually, but you must be ready to serve others. Someone who is considered a real love caster has experience in all manner of spells, no matter the difficulty. Training yourself in attraction, commitment, and marriage spells is an excellent place to start. But this by no means will make you a professional. Practice your craft and expand your knowledge; understand that you will possess the ability to help others in time truly. Types of Love Spells What better way to start broadening your experiences with love spells than by learning more about them? These spells work like just about any other spell. Simply apply your intention, use a medium (sigils, mantras, candles, or charm bags), and top it off with establishing the belief that you will receive what you want. So what kind of spells are available and which ones suit your needs the best? Let’s take a look at the many options you have at your disposal. Attraction Spells

%+27788225528 love spells in Toronto Psychic Readings, Attraction spells,Brin...

masabamasaba

%in ivory park+277-882-255-28 abortion pills for sale in ivory park

masabamasaba

+971565801893 Mtp-Kit (500MG) Prices » Dubai [(+971565801893**)] Abortion Pills For Sale In Dubai, UAE, Mifepristone and Misoprostol Tablets Available In Dubai, UAE CONTACT DR.Leen Whatsapp +971565801893 We Have Abortion Pills / Cytotec Tablets /Mifegest Kit Available in Dubai, Sharjah, Abudhabi, Ajman, Alain, Fujairah, Ras Al Khaimah, Umm Al Quwain, UAE, Buy cytotec in Dubai +971565801893''''Abortion Pills near me DUBAI | ABU DHABI|UAE. Price of Misoprostol, Cytotec” +971565801893' Dr.DEEM ''BUY ABORTION PILLS MIFEGEST KIT, MISOPROTONE, CYTOTEC PILLS IN DUBAI, ABU DHABI,UAE'' Contact me now via What's App…… abortion Pills Cytotec also available Oman Qatar Doha Saudi Arabia Bahrain Above all, Cytotec Abortion Pills are Available In Dubai / UAE, you will be very happy to do abortion in Dubai we are providing cytotec 200mg abortion pill in Dubai, UAE. Medication abortion offers an alternative to Surgical Abortion for women in the early weeks of pregnancy. We only offer abortion pills from 1 week-6 Months. We then advise you to use surgery if its beyond 6 months. Our Abu Dhabi, Ajman, Al Ain, Dubai, Fujairah, Ras Al Khaimah (RAK), Sharjah, Umm Al Quwain (UAQ) United Arab Emirates Abortion Clinic provides the safest and most advanced techniques for providing non-surgical, medical and surgical abortion methods for early through late second trimester, including the Abortion By Pill Procedure (RU 486, Mifeprex, Mifepristone, early options French Abortion Pill), Tamoxifen, Methotrexate and Cytotec (Misoprostol). The Abu Dhabi, United Arab Emirates Abortion Clinic performs Same Day Abortion Procedure using medications that are taken on the first day of the office visit and will cause the abortion to occur generally within 4 to 6 hours (as early as 30 minutes) for patients who are 3 to 12 weeks pregnant. When Mifepristone and Misoprostol are used, 50% of patients complete in 4 to 6 hours; 75% to 80% in 12 hours; and 90% in 24 hours. We use a regimen that allows for completion without the need for surgery 99% of the time. All advanced second trimester and late term pregnancies at our Tampa clinic (17 to 24 weeks or greater) can be completed within 24 hours or less 99% of the time without the need surgery. The procedure is completed with minimal to no complications. Our Women's Health Center located in Abu Dhabi, United Arab Emirates, uses the latest medications for medical abortions (RU-486, Mifeprex, Mifegyne, Mifepristone, early options French abortion pill), Methotrexate and Cytotec (Misoprostol). The safety standards of our Abu Dhabi, United Arab Emirates Abortion Doctors remain unparalleled. They consistently maintain the lowest complication rates throughout the nation. Our Physicians and staff are always available to answer questions and care for women in one of the most difficult times in their lives. The decision to have an abortion at the Abortion Clinic in Abu Dhabi, United Arab Emirates.+971565801893

+971565801893>>SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHAB...

Health

%in tembisa+277-882-255-28 abortion pills for sale in tembisa

masabamasaba

This presentation covers the following topics: What is logging? The purpose of logging: Debugging The purpose of logging: Security The purpose of logging: Stats & analytics Traditional logging Traditional logging: Advantages Traditional logging: Disadvantages The solution: Large-scale logging Large-scale logging: Core principles Large-scale logging: Solution types Large-scale logging: Cloud vs on-prem Large-scale logging: Operational complexity Large-scale logging: Security Large-scale logging: Costs Large-scale logging: On-prem comparison - Elasticsearch - Grafana Loki - VictoriaLogs On-prem comparison: Setup and operation On-prem comparison: Costs On-prem comparison: Full-text search support On-prem comparison: How to efficiently query 100TB of logs? On-prem comparison: Integration with CLI tools VictoriaLogs for large-scale logging VictoriaLogs demo instance - Ingestion rate: 3600 messages / minute - The number of log messages: 1.1 billion - Uncompressed log messages’ size: 1.5TB - Compressed log messages’ size: 23GB - Compression ratio: 47x - Memory usage: 150MB VictoriaLogs CLI integration demo - Which errors have occurred in all the apps during the last hour? - How many errors have occurred during the last hour? - Which apps generated the most of errors during the last hour? - The number of per-minute errors for the last 10 minutes - Status codes for the last hour - Non-200 status codes for the last week - Top client IPs for the last 4 weeks with 404 and 500 response status codes - Per-month stats for the given IP across all the logs Large-scale logging solution MUST provide excellent CLI integration VictoriaLogs: (temporary) drawbacks VictoriaLogs: Recap - Easy to setup and operate - The lowest RAM usage and disk space usage (up to 30x less than Elasticsearch and Grafana Loki) - Fast full-text search - Excellent integration with traditional command-line tools for log analysis - Accepts logs from popular log shippers (Filebeat, Fluentbit, Logstash, Vector, Promtail, Grafana Agent) - Open source and free to use!

Large-scale Logging Made Easy: Meetup at Deutsche Bank 2024

VictoriaMetrics

ADR, or Architecture Decision Record, is a valuable tool in software development for several reasons. It provides a centralized location for documenting and tracking architectural decisions, aiding both current and future team members. ADRs enhance communication among team members by documenting the rationale behind architectural decisions, especially beneficial during onboarding of new team members or when revisiting decisions. They serve as a knowledge base, enabling teams to learn from past decisions and refine their decision-making process. Additionally, ADRs contribute to transparency by helping stakeholders understand the reasons behind specific architectural choices. As with any other tool or process, introducing them into an organization can face several obstacles, and overcoming these challenges is crucial for successful implementation. In this talk I go through some common problems and our way of solving them.

Architecture decision records - How not to get lost in the past

Papp Krisztián

WSO2CON 2024 - Building the API First Enterprise – Running an API Program, fr...

WSO2

We specialize in Psychic Readings, Psychic Love Spells, Binding Love Spells, Obsession Spells, Voodoo Spells, Lottery Spells, Marriage Spells, Black Magic Spells, Palm Readings & much more. Are you depressed? We perform this come-to-me love spell that works instantly with the aim of Winnipeg back the victim to the person performing the magic. Have you lost your lover? We perform this come-to-me love spell that works instantly with the aim of bringing back the victim to the person performing the magic. Have you lost your lover? Do u need to solve any relationship problem? Contact the powerful spells caster chief kule with love spells that work overnight and love spells that really work. Have you found yourself infatuated with a special someone you think could be the one? Are you looking for a spell to provide them with a nudge in the right direction? Or maybe the spell you cast didn’t achieve the results you were hoping for? Whether you’re new or versed in the ways of spell casting, we’re here to help. Today we’re going to provide you with a detailed guide on the types of love spells to cast. Not only that but there’s something for those who wish to find outside advice from more advanced spell casters. We’re also going to provide you with the top sites available to help you with your dilemma. Let’s begin our journey by educating ourselves on love magic and what a real love caster looks like. Love Magic and Love Casters Love magic made its first appearance back in Ancient Egypt and has been an active practice since. This type of magic is a branch of traditional magic and can be practiced in various ways. Typically the more common use of love magic is through the work of spells, but other methods look like Charms Rituals-LOVE Potions-Dolls and even Amulets If you are interested in becoming a love caster, be prepared for what’s to come. A genuine love caster knows that the art of love casting is no easy feat and shouldn’t be done casually. You should know that not only does it require you to be gifted spiritually, but you must be ready to serve others. Someone who is considered a real love caster has experience in all manner of spells, no matter the difficulty. Training yourself in attraction, commitment, and marriage spells is an excellent place to start. But this by no means will make you a professional. Practice your craft and expand your knowledge; understand that you will possess the ability to help others in time truly. Types of Love Spells What better way to start broadening your experiences with love spells than by learning more about them? These spells work like just about any other spell. Simply apply your intention, use a medium (sigils, mantras, candles, or charm bags), and top it off with establishing the belief that you will receive what you want. So what kind of spells are available and which ones suit your needs the best? Let’s take a look at the many options you have at your disposal. Attraction Spells

%+27788225528 love spells in Knoxville Psychic Readings, Attraction spells,Br...

masabamasaba

Announcing Codolex 2.0 from GDK Software

Jim McKeeth

%+27788225528 love spells in Colorado Springs Psychic Readings, Attraction sp...

masabamasaba

Love witchcraft +27768521739 Binding love spell in Sandy Springs, GA |psychic near me by a powerful astrologer and spell caster in Atlanta. Bring back your lover with Asaf's voodoo-love witchcraft. Psychic Reading | Astrologer | Spell Caster | Obsession Spells | Black Magic | Witchcraft | Protection spell | wiccan spells. Black magic expert and voodoo love spells that work overnight to retrieve that love | lost love spell caster with powerful love psychic reading. Best astrologer & psychic in Sandy Springs, GA to renew your relationship & make your relationship stronger. love spells to bring back the feelings of love for ex-lovers. Increase the intimacy, affection & love between you and your lover using voodoo relationship obsession spells in USA. Money spells, easy love spells with just words, think of me spell, powerful love spell, spells of love, spells that work, love potion to attract a man, easy love spells with just words, pink candle prayer, white magic spells, call me spell, manifestation spell, gay love spells, Commitment spells, business spells and, how to bring back lost love in a relationship, Witchcraft love spells that work immediately to increase love & intimacy in your relationship. Attraction love spells to attract someone, stop a divorce, prevent a breakup & get your ex back. When using love binding spells, there are several things you should know, particularly how to protect yourself from negative energies and how to use the powers of incantations for the good of all people involved. When the focus is love, the results are truly magical. It’s important to remember love is not manipulative, it is not forceful, and it does not bend another to its will. Love is free-flowing, accepting, kind, and generous. For your love spell to work as intended, you must have good intentions in your heart. Below, we share the top five love spells you can use today to shift the energies in your life and create a future filled with love and fulfilment. Obsession spells to Get Your Ex-Lover Back. All women want one thing the most in life to be love and love in return – not much to ask. A lady wants a good man who loves you unconditionally and loyally. You want a man who is honest, hardworking, and loyal – not a complainer or a weakling or a self-centred man. You are a strong, independent, sensual, caring, loving woman. And you don’t think it’s asking too much to want to be with a loving, intelligent man with a good sense of humour and daring, an upright and confident man – who knows who he is. No one wants a chauvinistic and macho man, but you do want someone who will be willing to protect and care for you. Who loves you for you and not some kind of imaginary. You have no doubt that when the right guy appears on your doorstep, you’ll never let him go. But sometimes a man doesn’t realize he has that good woman.

Love witchcraft +27768521739 Binding love spell in Sandy Springs, GA |psychic...

chiefasafspells

WSO2Con2024 - Enabling Transactional System's Exponential Growth With Simplicity

WSO2

%+27788225528 love spells in Boston Psychic Readings, Attraction spells,Bring...

masabamasaba

Direct Style Effect Systems -The Print[A] Example- A Comprehension Aid

Philip Schwarz

WSO2Con2024 - WSO2's IAM Vision: Identity-Led Digital Transformation

WSO2

Recently uploaded (20)

Abortion Pills In Pretoria ](+27832195400*)[ 🏥 Women's Abortion Clinic In Pre...

WSO2CON2024 - It's time to go Platformless

%in kaalfontein+277-882-255-28 abortion pills for sale in kaalfontein

Abortion Pill Prices Tembisa [(+27832195400*)] 🏥 Women's Abortion Clinic in T...

%in Soweto+277-882-255-28 abortion pills for sale in soweto

%+27788225528 love spells in Toronto Psychic Readings, Attraction spells,Brin...

%in ivory park+277-882-255-28 abortion pills for sale in ivory park

+971565801893>>SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHAB...

%in tembisa+277-882-255-28 abortion pills for sale in tembisa

Large-scale Logging Made Easy: Meetup at Deutsche Bank 2024

Architecture decision records - How not to get lost in the past

WSO2CON 2024 - Building the API First Enterprise – Running an API Program, fr...

%+27788225528 love spells in Knoxville Psychic Readings, Attraction spells,Br...

Announcing Codolex 2.0 from GDK Software

%+27788225528 love spells in Colorado Springs Psychic Readings, Attraction sp...

Love witchcraft +27768521739 Binding love spell in Sandy Springs, GA |psychic...

WSO2Con2024 - Enabling Transactional System's Exponential Growth With Simplicity

%+27788225528 love spells in Boston Psychic Readings, Attraction spells,Bring...

Direct Style Effect Systems -The Print[A] Example- A Comprehension Aid

WSO2Con2024 - WSO2's IAM Vision: Identity-Led Digital Transformation

Copenhagen ruby brigade november 2018

1. EVENTS ON RAILSEVENTS ON RAILS Applied Event Sourcing, Domain-Driven Design and CQRS by Anders Lemke Platform Architect and Lead Engineer at Zetland 1

2. 2

3. 3

4. 4

5. 5

6. 6

7. 7

8. 8

9. DOMAIN EVENTDOMAIN EVENT 9

10. DOMAIN EVENTDOMAIN EVENT Something happened, that somebody cares about 9

11. class Editor::StoryPublished < DomainEvent attribute :story_content attribute :story_id attribute :user_id end 10

12. 11

13. 12

14. 13

15. EVENT SOURCINGEVENT SOURCING 14

16. EVENT SOURCINGEVENT SOURCING The authoritative source of truth is an append-only stream of immutable events 14

17. . This happened 2. then, this happened 3. then, this happened 4. ... 15

18. 16

19. 17

20. 18

21. 19

22. # In aggregate_repository.rb def build(aggregate_class, aggregate_id) aggregate = aggregate_class.new(aggregate_id) events = EventStore.load_events( aggregate_class, aggregate_id ) aggregate.rebuild(events) end 20

23. 21

24. # In editor/story.rb def apply_story_revision_created(event) @story_content = event.story_content end 22

25. 23

26. # In editor/story.rb def publish(user_id:) return unless reviewed? apply Editor::StoryPublished.new( user_id: user_id, story_id: @story_id, story_content: @story_content, ) end 24

27. # In editor/story.rb def apply_story_published(event) @status = :published end 25

28. 26

29. # In command_handler.rb EventStore.store_events( aggregate_class, aggregate_id, aggregate.unpublished_events ) 27

30. 28

31. 29

32. 30

33. CQRSCQRS (Command Query Responsibility Segregation) 31

34. 32

35. 33

36. BOUNDED CONTEXTBOUNDED CONTEXT 34

37. ✍ A story is something you edit (Editor) 35

38. ✍ A story is something you edit (Editor) A story is something you consume (Consume) 35

39. ✍ A story is something you edit (Editor) A story is something you consume (Consume) A story is something you count (Internal reporting) 35

40. ✍ A story is something you edit (Editor) A story is something you consume (Consume) A story is something you count (Internal reporting) A story is something you discover (Discover) 35

41. 36

42. Consume: A row for members when Editor::StoryPublished Consume::Story.create( story_id: event.story_id, story_content: event.story_content ) 37

43. 38

44. 39

45. OK, WHY?OK, WHY? 40

46. Only design simple facts 41

47. 42 . 1

48. 42 . 2

49. class Editor::StoryPublished < DomainEvent attribute :story_content attribute :story_id attribute :user_id end 43

50. Behaviour over structure 44

51. 45

52. 46

53. 47

54. 48

55.

56. 49

57. 50

58. class Identity::NameChanged < DomainEvent attribute :new_name attribute :user_id end 51

59. 52

60. 53

61. 54

62. Decouple data change from data usage 55 . 1

63.

64. 56

65. 57

66. 58

67. UBIQUITOUS LANGUAGEUBIQUITOUS LANGUAGE 59

68. 60

69. 61

70. story_revision_created.rb story_approved_for_publishing.rb story_published.rb story_scheduled_for_publishing.rb story_scheduling_cancelled.rb story_sent_to_followers.rb story_sent_via_push.rb story_deleted.rb story_unpublished.rb 62

71. WHAT NOW?WHAT NOW? 63

72. CHALLENGESCHALLENGES 64

73. CHALLENGESCHALLENGES Added complexity at high level 64

74. CHALLENGESCHALLENGES Added complexity at high level Write some new Rails generators 64

75. CHALLENGESCHALLENGES Added complexity at high level Write some new Rails generators Relearn to design software 64

76. CHALLENGESCHALLENGES Added complexity at high level Write some new Rails generators Relearn to design software Eventual consistency 64

77. CHALLENGESCHALLENGES Added complexity at high level Write some new Rails generators Relearn to design software Eventual consistency Evolving events over time 64

78. STANDING ON THE SHOULDERS OFSTANDING ON THE SHOULDERS OF Eric Evans Domain-Driven Design Bounded context Ubiquitous Language Greg Young Event Sourcing CQRS Alberto Brandolini Event Storming 65

79. READREAD by by Turning the database inside-out with Apache Samza Martin Klepmann Introducing Event Storming Alberto Brandolini Vaughn Vernon - Rethinking Legacy and Monolithic Systems 66

80. WHERE TO START?WHERE TO START? 67

81. EVENT STORMINGEVENT STORMING 68

82.

83. 69

84.

85. 70

86. Only design simple facts Decouple data change from data usage Behaviour over structure Ubiquitous Language 71

87. THANK YOUTHANK YOU 20 44 21 27 anders@zetland.dk 72