DDD on sysarcher/@ich_codehttps://sysarcher.github.io/categories/ddd/Recent content in DDD on sysarcher/@ich_codeHugoen-usMon, 14 Oct 2019 21:22:37 +0200Getting Started with Clojure[script] Behind Corporate Proxyhttps://sysarcher.github.io/posts/java-proxies/Mon, 14 Oct 2019 21:22:37 +0200https://sysarcher.github.io/posts/java-proxies/<p>So on my Clojurescript journey, the first roadblock I hit was corporate proxy. I don&rsquo;t know why Java, maven, clojure (everybody?) doesn&rsquo;t respect the environment variables but this is a real pain.</p> <h3 id="getting-started">Getting started</h3> <p>Clojurescript is written in Clojure which requires Java. So we need to get all three up and running.</p> <h4 id="java">Java</h4> <p>To get Java JDK and JRE, run:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-console" data-lang="console"><span style="display:flex;"><span>$ sudo apt install openjdk-11-jre </span></span><span style="display:flex;"><span>$ sudo apt install openjdk-11-jdk </span></span></code></pre></div><p>For proxy settings, edit <code>/etc/java-11-openjdk/net.properties</code>.</p>So on my Clojurescript journey, the first roadblock I hit was corporate proxy. I don’t know why Java, maven, clojure (everybody?) doesn’t respect the environment variables but this is a real pain.

Getting started

Clojurescript is written in Clojure which requires Java. So we need to get all three up and running.

Java

To get Java JDK and JRE, run:

$ sudo apt install openjdk-11-jre
$ sudo apt install openjdk-11-jdk

For proxy settings, edit /etc/java-11-openjdk/net.properties.

Example for http proxy in the file:

http.proxyHost="proxy-addr.company.com"
http.proxyPort=8080
http.nonProxyHosts=localhost|127.*|[::1]

Maven

This was the hardest to figure out. And it’s crazy (coming from a newbie perspective) that maven doesn’t make it easy to just reuse Java or System proxies or respect the http_proxy variable. Madness. Moreover, you need to create the configuration file at ~/.m2/settings.xml with the following contents:

<settings>
<proxies>
    <proxy>
        <id>httpproxy</id>
        <active>true</active>
        <protocol>http</protocol>
        <host>proxy-addr.company.com</host>
        <port>8080</port>
        <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
    <proxy>
        <id>httpsproxy</id>
        <active>true</active>
        <protocol>https</protocol>
        <host>proxy-addr.company.com</host>
        <port>8080</port>
        <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
</proxies>
</settings>

Clojure

make sure rlwrap is installed (sudo apt install rlwrap)

Download and install clojure using the following commands:

$ curl -O https://download.clojure.org/install/linux-install-1.10.1.469.sh  # This is the current version as of writing
$ chmod +x linux-install-1.10.1.469.sh
$ sudo ./linux-install-1.10.1.469.sh

Using the command clj launches the repl. Thankfully!

Leiningen

Follow the steps on https://leiningen.org/

curl -O "https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein"
chmod a+x lein
mv lein ~/bin/

Create a Test Project

To test lein and figwheel+reagent:

$ lein new figwheel some-name -- --reagent
]]>Evolutionary Architecturehttps://sysarcher.github.io/posts/evolutionary-architecture/Sun, 22 Sep 2019 21:22:37 +0200https://sysarcher.github.io/posts/evolutionary-architecture/<p>Evolvability of Architectural Styles&hellip;</p> <ul> <li>Big ball of mud</li> <li>Monoliths</li> <li>Event-driven architectures</li> <li>Service-oriented architectures (SOA)</li> <li>Serverless</li> </ul>Evolvability of Architectural Styles…

  • Big ball of mud
  • Monoliths
  • Event-driven architectures
  • Service-oriented architectures (SOA)
  • Serverless
]]>