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Rancher 1.6 on Macbook

Introduction Installing Rancher 1.6 on your Macbook should be straight forward. In my case it was not as easy as I thought because of version compatibility between Docker and Rancher. Here are my steps, enjoy.
Install Docker Toolbox in your Macbook First of all Rancher 1.6 does not support Docker for Mac, so instead you need Docker Toolbox for Mac. Check this page for differences between Docker for Mac and Docker Toolbox for Mac. One important point at the time you install Docker Toolbox for Mac: you need to get the correct version of the supported Docker. Rancher 1.6 supports some Docker versions. You can check the list on this support page. If you are trying for the first time please get the Community Edition (ce) of Docker. Here is a functional example: Docker Toolbox for Mac Version 17.06.0-ce. Download: https://github.com/docker/toolbox/releases/tag/v17.06.0-ceGet the .pkg file for MacbookBe careful: Docker Toolbox always downloads the current Docker version from Internet, so you…
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Collection of Articles for Blockchain, Smart Contracts and Ethereum

This topic is hot: Blockchain, Smart Contracts and Ethereum, time to take a look at some articles about this. Also to see how this can be done in Java world. Article I found useful sofar:
Very simple intro into Blockchain and Smart Contracts: https://goo.gl/fJ5srsSmart Contracts and Ethereum: https://goo.gl/TEFYcRIntroduction of Programming Smart Contracts on Ethereum: https://goo.gl/oGoSWvInterfacing with Ethereum Smart Contracts in Java: https://goo.gl/yeXJK1 Enjoy!

Java Everywhere: Java as Universal Programming Language

Manuel Klein and I wrote an article about using Java as Universal Programming Language at heise Developer. Writing about programming language is always interesting since many developers look this topic as religion. You can see this in the discussion part of the article with more than 200 discussion threads. It is always the question which is the best programming language ever.

I'm just very pragmatic, Java is still the programming language to be chosen - with all its advantages and disadvantages, if you want to implement every single of your software with one programming language. It is often better to have one programming language for all part of your software and also for all the developers in your company, so that they can communicate and articulate. This has an analogy with a "normal" language.

A good example is English as a general purpose language. With English many people in the world can communicate with each other. Also a good example is Indonesian language. Ind…

Microservice - Architectural Patterns

I have to introduce Microservice with all its architectural patterns to my team and at the end I could say, you will find very valuable information on Internet! There are a lot of very good sources for this topic on Internet, amazing. My problem is only following: I still cannot find all those good articles and blogs in one place.

So here is the result of my short research to create my presentation about "Microservice - Architectural Patterns" in German language. Following sources have great values on this topic:

General introduction to Microservices: https://www.nginx.com/blog/introduction-to-microservices and https://heise.de/-3091905 and https://jaxenter.de/was-sind-microservices-40571Architectural Patterns for Microservices: http://microservices.ioDomain Driven Design: https://de.wikipedia.org/wiki/Domain-driven_DesignVery good explanation for communication possibilities in Microservices: https://capgemini.github.io/architecture/is-rest-best-microservicesIntroduction to O…

No Place for Dart Language...

It is interesting to see that even Google cannot make Dart - after more than 5 years - as a real challange to JavaScript. At the end Dart is "just" another insignificant programming language and compiles those codes to JavaScript. In this point Microsoft is more intelligent by doing TypeScript which is nearer to JavaScript. Check this article for comparison between Dart and TypeScript: Why did the Angular team choose TypeScript over Dart?

If Google were to invest that amount of ressources for Dart in GWT (Java to JavaScript compiler), which is definitely a very good product and Java is still the number one programming language... I cannot imagine where we are today with GWT.

So I would stick to Java with GWT and if I need to write directly in JavaScript I would use TypeScript. No place for Dart. Just curious, Google seems to be very clear with its target, if a product is not successful, remove it (see iGoogle, Google Wave, etc.). This could also happen to Dart?

Platform Strategy: From Portlets to OpenSocial Gadgets to Progressive Web Apps: State of the Art

Introduction As the world was still at Java's hand we often define what so called a component-based platform. I had this experience in the year 2000 with OpenUSS (Open University Support System). At that time I had an idea to develop a platform which is extendable using component architecture and J2EE technology (OpenUSS Component Architecture). After a while we saw the birth of portal and portlet technology. Everyone tried to build portlets which can be easily installed in a portal server, all Java based. Do you remember all those portals like Apache Jetspeed, Liferay, JBoss Portal, IBM Webshepe Portal, etc?

After the portal wave there was OpenSocial gadget which is not only specified for Java but generally available for different technology implementations. It uses HTML, JavaScript and REST completely independent from Java. Apache Shindig was an Open Source implementation for OpenSocial gadgets container. OpenSocial gadget was also the main technology for iGoogle, Orkut, MySpa…