jQuery Takes Over the Pointer Events Polyfill from Google

by Abel Avram on  Dec 30, 2014 1

The Chromium team announced back in August that Google is no longer working on implementing Pointer Events in Chrome in order to focus on Touch Events. Now they have given control to the Pointer Events polyfill library to jQuery which is hoping to “drive developer adoption of this unified event system” and eventually see “all browsers implement this standard natively.”

Experiences and Good Practices from Hackathons

by Ben Linders on  Dec 27, 2014

Hackathons are events where developers work together during a fixed period to collaboratively develop software. They provide learning opportunities and space for developers and organizations sponsoring the hackathons to network and have some fun.

The Future of Microservices

by Jan Stenberg on  Dec 01, 2014 2

Microservices are not new ideas and we will over the course of 3-5 years end up rebuilding WS-* the same way Web Services did rebuild all from CORBA unless we learn from our mistakes and improve to prevent them from being made again, Greg Young stated in a presentation at the Microservices Conference in London.

Sharing Data Between Bounded Contexts in Domain-Driven Design

by Jan Stenberg on  Nov 25, 2014 1

When using Domain-Driven Design (DDD) separating the concerns of a large system into bounded contexts with each context using its own data store there is often a need to share some common data. One way of doing that is to let each context publish events about changes, events that others can listen to, Julie Lerman recently explained in MSDN Magazine.

CQRS as a Style of Thinking

by Jan Stenberg on  Nov 20, 2014 3

A common context for Command-Query Responsibility Segregation (CQRS) is a collaborative domain with multiple users working on the same set of data, it is less suitable in domains with only a single user working on a piece of data, Udi Dahan explained when discussing CQRS in an interview.

Leslie Lamport on Distributed Systems and Precise Thinking

by Sergio De Simone on  Oct 16, 2014

Leslie Lamport is the author of some of the most cited computer science papers and won a Turing Award in 2013 for his seminal work in distributed and concurrent systems. This is a summary of an interview that Lamport gave to Software Engineering Radio touching themes such as his early work in distributed systems and the importance of precise thinking in programming.

The Basics of Event Sourcing and Some CQRS

by Jan Stenberg on  Sep 30, 2014 1

State transitions are an important part of our problem space and should be modelled within our domain, Greg Young states in a recent presentation focusing on basic event sourcing and how CQRS fits in.

Microservices vs Shared Libraries

by Jan Stenberg on  Sep 28, 2014 4

Robert C. Martin's advice is to start with shared libraries and a plugin architecture and only when that becomes insufficient consider microservices. Giorgio Sironi argues against this, emphasising how different interactions between microservices are compared to interactions between objects and warns for the cost of retrofitting microservices over an existing code base.

Building a Reactive Process Manager Using Actor Model

by Jan Stenberg on  Sep 05, 2014 1

Vaughn Vernon describes a reactive process manager supervising the process of finding the best loan quotes from banks with a focus on the reactive part, using Actor model for the implementation with examples written in Scala using Akka and C# using his recently published Dotsero toolkit.

Experiences Building a Reactive Event-Driven CQRS Application

by Jan Stenberg on  Aug 01, 2014

CQRS and Event Sourcing provide a clear and concise way to build distributed applications that adhere to the reactive manifesto, Duncan DeVore claimed in a recent presentation sharing his experiences building a distributed application using Akka and Scala.

Lessons Learned Building Distributed Systems at Bitly

by Sergio De Simone on  Jul 23, 2014

At the Bacon Conference last May, bitly Lead Application Developer Sean O'Connor explained the most relevant lessons bitly developers learned while building a distributed system that handles 6 billions clicks per month.

Microsoft Tackles Internet-of-Things With New Data Stream Processing Service

by Richard Seroter on  Jul 22, 2014 1

Last week at the Microsoft Worldwide Partner Conference, Microsoft took the wraps off of Azure Event Hubs. This service – in preview release until General Availability next month – is for high throughput ingress of data streams generated by devices and services. Event Hubs resembles Amazon Kinesis and uses an identical pricing scheme based on data processing units and transaction volume.

Building a Reactive DDD and CQRS Based Application Using Akka

by Jan Stenberg on  Jun 28, 2014

DDD and CQRS are great for building scalable software considering concepts like bounded contexts, transaction boundaries and event based communication and is together with Akka a complete platform for building enterprise applications, Pawel Kaczor starts a three-part series building an reactive application based on these concepts.

Greg Young: Scheduling for Things to Happen in the Future

by Jan Stenberg on  Jun 23, 2014

Delay of message sending into the future is a very powerful pattern and is often the preferable way of dealing with temporal problems compared to batch job that will run a query on the domain model and update some aggregates, Greg Young explained at the recent DDD Exchange conference in London.

DataTorrent 1.0 Handles >1B Real-time Events/sec

by Abel Avram on  Jun 03, 2014 7

DataTorrent is a real-time streaming and analyzing platform that can process over 1B real-time events/sec.

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