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<!DOCTYPE html>
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<meta name="description" content="Microservices are an architecture where independent, functionality-contained programs communicate via network calls.">
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<title>Microservices - Full Stack Python</title>
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<h1>Microservices</h1>
<p>Microservices are an application architecture style where independent,
self-contained programs with a single purpose each can communicate with
each other over a network. Typically, these microservices are able to be
deployed independently because they have strong separation of
responsibilities via a well-defined specification with significant
backwards compatibility to avoid sudden dependency breakage.</p>
<h2>Why are microservices getting so much buzz?</h2>
<p>Microservices follow in a long trend of software architecture patterns
that become all the rage. Previously,
<a href="https://en.wikipedia.org/wiki/Common_Object_Request_Broker_Architecture">CORBA</a>
and (mostly XML-based) service-oriented architectures (SOA) were the
hip buzzword among
<a href="http://www.igloocoder.com/2271/ivory-tower-architect">ivory tower architects</a>.</p>
<p>However, microservices have more substance because they are typically based
on <a href="/application-programming-interfaces.html">RESTful APIs</a> that are far
easier for actual software developers to use compared with the previous
complicated XML-based schemas thrown around by enterprise software companies.
In addition, successful applications begin with a monolith-first approach using
a single, shared application codebase and deployment. Only after the application
proves its usefulness is it then broken down into microservice components to
ease further development and deployment. This approach is called the
"monolith-first" or
"<a href="http://martinfowler.com/bliki/MonolithFirst.html">MonolithFirst</a>" pattern.</p>
<h3>Microservice resources</h3>
<ul>
<li>
<p>Martin Fowler's
<a href="http://martinfowler.com/articles/microservices.html">microservices</a>
article is one of the best in-depth explanations for what microservices are
and why to consider them as an architectural pattern.</p>
</li>
<li>
<p><a href="http://dev.otto.de/2015/09/30/on-monoliths-and-microservices/">On monoliths and microservices</a>
provides some advice on using microservices in a fairly early stage of
a software project's lifecycle.</p>
</li>
<li>
<p><a href="http://www.skybert.net/python/developing-a-restful-micro-service-in-python/">Developing a RESTful microservice in Python</a>
is a good story of how an aging Java project was replaced with a
microservice built with Python and Flask.</p>
</li>
<li>
<p><a href="http://technologyconversations.com/2015/11/10/microservices-the-essential-practices/">Microservices: The essential practices</a>
first goes over what a monolith application looks like then dives into what
operations you need to support potential microservices. For example, you really
need to have continuous integration and deployment already set up. This is a
good high-level overview of the topics many developers aren't aware of when they
embark on converting a monolith to microservices.</p>
</li>
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