Artikelen

Een tekortkoming van blockchain

Als je werkzaam bent in de ICT, dan heb je vast gehoord van het CAP-theorema: voor een gedistribueerd systeem is het onmogelijk om tegelijk te voldoen aan alle drie de aspecten Consistency, Availability en Partition Tolerance.

Sander van LaarEen tekortkoming van blockchain
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Initiatief Maleisië voor blockchain voor traceren agrofoodproducten

Volgens Star online wil nu ook de Maleisische staat Penang op korte termijn blockchaintechnologie invoeren voor het traceren van volledige voedingsketens van oorsprong tot gebruikers. Tijdens de Penang International Halal Expo & Conference op 1 maart 2019 sprak de staatssecretaris van Agriculture en Agro-based Industries over het traceren van levensmiddelen.

Sander van LaarInitiatief Maleisië voor blockchain voor traceren agrofoodproducten
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Custom CloudWatch Metrics – revisited

In my previous blog I have investigated how to create custom metrics for an EC2 instance using Python and Boto3, the AWS SDK for Python. At the time I was specifically interested in demonstrating that it was not necessary to use these “old fashionedPERL scripts to post custom metrics from your EC2 instance, but you could also do this yourself rather easily using Python. All steps I’ve taken in the process have been performed manually, but that’s not really something you’d like to do whenever there’s more than [insert your threshold here] instances to provision.

Milco NumanCustom CloudWatch Metrics – revisited
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President Macron roept op tot invoering blockchain in agrifood

Afgelopen 23 februari heeft Macron in een speech bij de opening van de jaarlijkse landbouwbeurs in Parijs zijn visie gegeven op het Europese landbouwbeleid. Met de verwachte verdubbeling van de bevolking van Afrika in 2050 en de klimaatveranderingen is het tijd voor actie.

Sander van LaarPresident Macron roept op tot invoering blockchain in agrifood
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Java User Group 7 & 8 Februari

# Introduction

Although I have never read “Clean Code”, by Robert “Uncle Bob” Martin, it’s known as one of the books you have to read if you want to grow as a developer. Writing code that’s doing it’s job is one thing, making sure it is understandable and maintainable by yourself and other developers in your team is essential to keep the ability to deliver business requirements in a timely fasion.

It did not take me long to sign up after I saw Java Usergroup Utrecht, together with my old customer Rabobank, posting 2 meetups with Uncle Bob. One is about Clean Code, the other one is about Clean Architecture. After I was confirmed, I checked with my employer, who thought it was no problem at all to attend. Normally I do this the other way around, but I reckoned this would sell out really quickly. Turned out I was right. There were 400 slots for each day, with a big waitlist eager to jump in if someone could not make it.

In this blog, I share what I have learned on these two very interesting days.

Bas LangenbergJava User Group 7 & 8 Februari
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Custom CloudWatch Metrics in Python? Yes we can!

Introduction

Currently, AWS has three associate level certifications: Solutions Architect, Developer and SysOps Administrator. In 2017, I have passed the certification exams for the first two certifications and as I visited AWS re:Invent in Las Vegas last year, I decided that I would like to also pass the one that is missing from my curriculum right now.

On Course For Certification

One of the ways to prepare for the AWS Associate certifications (apart from reading the documentation), is completing one of the many courses being offered on the on-line learning platforms. For my first two certifications, I used the certification training offered by A Cloud Guru which were very good. However, in the meantime I have also completed some trainings on the Udemy Platform by Stephane Maarek on miscellaneous topics related to Amazon Web Services (CloudFormation Masterclass, AWS Lambda and the Serverless Framework) that I also like very much, so I decided to start my certification course with Stephane’s wonderful “Ultimate AWS Certified SysOps Administrator Associate 2019” (quite a mouthful, but it’s a 17 hour journey).

Milco NumanCustom CloudWatch Metrics in Python? Yes we can!
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Specific Integrations

This is the sixth blog in a series of 6 blogs about integration 2.0. Did you miss one blog, read the fifth blog Services!

The API- and Event hub may support most of the integration needs. Certain data however may require a specific approach, for instance if the size, speed or format of data requires this, or an external party demands it.

Harald van der WeelSpecific Integrations
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Services

This is the fifth blog in a series of 6 blogs about integration 2.0. Did you miss one blog, read the fourth blog Integration 2.0: Interactions!

Though Integration 2.0 does not explicitly mention Services or Service Oriented Architecture (SOA) it makes a clear distinction between stateful services -services that maintain specific data – and stateless services that don’t.

Harald van der WeelServices
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Integration 2.0: Interactions

This is the fourth blog in a series of 6 blogs about integration 2.0. Did you miss one blog, read the third blog Integration 2.0 Main Integration Concepts!

The Event and API hub are the central components in the integration landscape: In principle all communication will go through them. Besides loosely coupling EAC-s and processes it connects with other generic IT capabilities (functions) as well, like Master Data Management (MDM), Reference Data Management (RDM), Business Rule Management (BRM), Identity and Access Management (IAM) and Audit and Compliance Management. These all may provide functionality or data required by processes, EAC-s or each other. However, these services and EAC-s themselves are passive components other than publishing events that might be listened to by other components.

Harald van der WeelIntegration 2.0: Interactions
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Integration 2.0: Main integration concepts

This is the third blog in a series of 6 blogs about integration 2.0. Read the first blog Integration 2.0 and second blog Integration 2.0:Introdution!

EAC-s may be integrated through their standard interfaces. API-s are centrally exposed to the enterprise though an API-hub. Events are exchanged from publishers to subscribers through an Event-hub.

Harald van der WeelIntegration 2.0: Main integration concepts
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