Java Magazine, Mar/Apr 2018
The New Way to Build and Ship Software ORACLE COM JAVAMAGAZINE MARCH APRIL 2018 14 microservices and containers A pplication development is continually in the process of moving to new paradigms either at a high level mainframe PC server web mobile cloud or a low level such as the endless succession of web frameworks While the higher level trends endure its not always easy to gauge what will survive among the lower level technologies In this issue we examine the high level trend containers and their low level use running microservices Containers are the natural evolution of virtual machines and will surely endure long term The natural fit between containers and the cloud drives the popularity of both technologies Microservices could well evolve quickly into something else The benefits of loosely coupled services are balanced by the complexity of coding testing debugging and deploying them As the trade ofs are better understood and computing needs evolve microservices could well morph into a refined version of current models that are still likely to be housed in containers on the cloud We start by showing how to develop a microservice and deploy it in Docker containers page 15 We then examine the DevOps pipeline for containerized apps page 32 We compare and combine Java modules and OSGi as intraapplication containers page 42 and finally we look at Wookiee page 53 a framework that eliminates a lot of the grunt work in developing microservices In addition we examine whats new in Groovy 30 page 61 continue our series on the mechanics of the JVM page 73 and look at building an API using Spring page 81 Enjoy CREATING MICROSERVICES WITH PAYARA MICRO 15 DEVOPS WITH CONTAINERBASED DELIVERY PIPELINES 32 WORKING WITH OSGi AND JAVA 9 MODULES 42 WOOKIEE REDUCING MICROSERVICE CONFIGURATION 53 ART BY WES ROWELL
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