Deploying with JRuby: Deliver Scalable Web Apps using the by Joe Kutner

By Joe Kutner

Deploy utilizing the JVM's excessive functionality whereas construction your apps within the language you're keen on. JRuby is a quick, scalable, and robust JVM language with the entire advantages of a standard Ruby setting. See tips on how to consolidate the numerous relocating components of an MRI-based Ruby deployment onto a unmarried JVM technique. You'll find out how to port a Rails program to JRuby, get it into construction, and hold it running.

JRuby deployments have fewer relocating elements and devour much less reminiscence than conventional Ruby deployments, yet to set up your apps at the JVM, you must research a few new methods. This ebook introduces you to 3 JRuby deployment recommendations that might provide the functionality and scalability you would like whereas letting you employ the language you love.

You'll begin by way of porting an present program to JRuby, getting ready the app to use the JVM platform. Then you'll use Vagrant and Puppet to construct a digital construction setting so that you have a sturdy, reproducible position to discover JRuby deployment.

along with your setting in position, you'll test with uncomplicated JRuby deployment with Warbler as you package deal your Ruby net software right into a unmarried dossier you could set up to a Java program server. subsequent you'll arrange the light-weight Trinidad net server to create a extra versatile, modular deployment that matches extra complicated occasions yet nonetheless feels pleasant and generic to Ruby builders. You'll change to powering your app with TorqueBox, an all-in-one JRuby atmosphere that incorporates integrated aid for messaging, scheduling, and daemons--perfect for dealing with the "big jobs." Then, you'll organize a continual integration setting with Jenkins so that you can installation just like the pros.

Deploying with JRuby is the lacking hyperlink among having fun with JRuby and utilizing it within the actual global to construct high-performance, scalable applications.

What You Need:

To run the examples during this e-book, you'll want a desktop that may run the Java digital Machine.

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Stdin: is not a tty notice: /Stage[main]//Exec[apt-update]/returns: executed successfully notice: /Stage[main]/Apache2/Package[apache2]/ensure: ensure changed 'purg... 04 seconds Apache is running on our box. Let’s point our browser to http:/localhost:8000, and we’ll see the page shown in Figure 7, The Apache splash page, on page 31. That takes care of our infrastructure’s front end; now let’s configure the back end. Installing PostgreSQL Like many web applications, Twitalytics is backed by a relational database.

83 seconds Puppet has installed the JDK on our virtual machine. 32-33-server #70-Ubuntu SMP Thu Jul 7 22:28:30 UTC 2011 ... 3 LTS Welcome to the Ubuntu Server! 0-b09, mixed mode) Excellent! Now we’re ready to install JRuby. Installing JRuby Having JRuby installed on our production server is not necessarily a requirement. Only one of the three deployment strategies we’ll discuss in this book requires the installation of a JRuby runtime. The others provide it for us. But JRuby is a powerful tool that’s helpful to have around, so we’ll include it in our base environment.

Default] up Importing base box 'warbler'... Booting VM... Waiting for VM to boot. This can take a few minutes. Running provisioner: Vagrant::Provisioners::Puppet... pp... 23 seconds Now that our warbler virtual machine is ready, we can install our web server. 2 Installing Apache Tomcat As we discussed earlier in the chapter, we’re going to use Tomcat to serve up our WAR file. Tomcat provides an implementation of the Java Servlet API, which is why it’s often called a servlet container. The Servlet API defines a protocol for receiving and responding to requests (usually from the Web).

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