background preloader


Facebook Twitter

The building blocks of software. Does each microservice really need its own database? The short answer is yes.

Does each microservice really need its own database?

However, before you start hyperventilating about the cost of all those extra Oracle licenses, lets first explore why it is essential to do this and then discuss what is meant by the term ‘database’. The main benefit of the microservice architecture is that it dramatically improves agility and velocity. That’s because when you correctly decompose a system into microservices, you can develop and deploy each microservice independently and in parallel with the other services. In order to be able to independently develop microservices , they must be loosely coupled.

Microservices architecture. MicroService4Net - Create Micro Services Easily with C# Introduction From Wikipedia ( Background In the last couple of years, microservices became a common software architecture in many complex systems.

MicroService4Net - Create Micro Services Easily with C#

In this tip, I want to introduce a library that I wrote (MicroService4Net) that makes the creation of such services very easy for C# programmers. So, if you follow my instructions, you will get an HTTP server that reacts to HTTP requests and returns json responses (very roughly speaking). You can run it as a Windows service or as a console application (you don't need to choose only one of them when you open your new project). And you don't need IIS for this (everything is self hosted). Using the Code You can download the source code from here. Open a new Visual Studio console application and add the MicroService4Net nuget package to it: Install the dependencies: In Program.cs file, add this using: Hide Copy Code using MicroService4Net; Write the following code in the Main function: Microservices in C# Part 1: Building and Testing. Microservice Architecture Overview I’m often asked how to design and build a Microservice framework.

Microservices in C# Part 1: Building and Testing

It’s a tricky concept, considering loose level of coupling between Microservices. Consider the following scenario outlining a simple business process that consists of 3 sub-processes, each managed by a separate Microservice: Microservice Architecture core concept In order to test this process, it would seem that we need a Service Bus, or at the very least, a Service Bus mock in order to link the Microservices. A Practical Example First, let’s expand on the previous tutorial and actually implement a simple Microservice-based application. Take an integer-based input and double its valueTake a text-based input and reverse it. Enterprise Integration Patterns - Return Address. Microservices: It’s not (only) the size that matters, it’s (also) how you use them – part 3. Danish version: Part 1 – Microservices: It’s not (only) the size that matters, it’s (also) how you use themPart 2 – Microservices: It’s not (only) the size that matters, it’s (also) how you use themPart 4 – Microservices: It’s not (only) the size that matters, it’s (also) how you use themPart 5 – Microservices: It’s not (only) the size that matters, it’s (also) how you use them In Microservices: It’s not (only) the size that matters, it’s (also) how you use them – part 2, we again discussed the problems with using (synchronous) 2 way communication between distributed (micro) services.

Microservices: It’s not (only) the size that matters, it’s (also) how you use them – part 3

We discussed how the coupling problems caused by 2 way communication combined with micro services actually result in the reinvention of distributed objects. We also discussed how the combination of 2 way communication and the lack of reliable messaging and transactions cause complex compensation logic in the event of a failure. Reusable service, 2 way (synchronous) communication and coupling Our solution :) Enterprise Integration Patterns - Message. An enterprise has two separate applications that are communicating via Messaging, using a Message Channel that connects them.

Enterprise Integration Patterns - Message

How can two applications connected by a message channel exchange a piece of information? Package the information into a Message, a data record that the messaging system can transmit through a message channel. Thus any data that is to be transmitted via a messaging system must be converted into one or more messages that can be sent through messaging channels. Related patterns: Canonical Data Model, Command Message, Document Message, Event Message, Message Channel, Message Expiration, Message Sequence, Messaging, Request-Reply Want to track what happened since the book came out? REST and MQTT: Yin and Yang of Micro-Service APIs. It seemed that the worst was over – I haven’t heard a single new portmanteau of celebrity names in a while (if you exclude ‘Shamy’ which is a super-couple name of Sheldon and Amy from The Big Bang Theory but being a plot device, I don’t think it counts).

REST and MQTT: Yin and Yang of Micro-Service APIs

Then when I researched for this blog post I stumbled upon project QEST, a mashup of MQTT and REST. Et tu, Matteo Collina? What Matteo did in the project QEST is an attempt to bridge the world of apps speaking REST and the world of devices speaking MQTT with one bilingual broker. I find the idea intriguing and useful in the context of the IoT world. However, what I am trying to achieve with this post is address the marriage of these two protocols in the context of micro-service-based distributed systems.

Microservices. "Microservices" - yet another new term on the crowded streets of software architecture.


Although our natural inclination is to pass such things by with a contemptuous glance, this bit of terminology describes a style of software systems that we are finding more and more appealing. We've seen many projects use this style in the last few years, and results so far have been positive, so much so that for many of our colleagues this is becoming the default style for building enterprise applications. Sadly, however, there's not much information that outlines what the microservice style is and how to do it. In short, the microservice architectural style [1] is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API. These services are built around business capabilities and independently deployable by fully automated deployment machinery.

Building Microservices: Inter-Process Communication. This is the third article in our series about building applications with a microservices architecture.

Building Microservices: Inter-Process Communication

The first article introduces the Microservices Architecture pattern, compares it with the Monolithic architecture pattern, and discusses the benefits and drawbacks of using microservices. The second article describes how clients of an application communicate with the microservices via an intermediary known as an API gateway.