RESTful Rails Development: Building Open Applications and Services

By Silvia Puglisi

The net is slowly yet definitely altering from a version within which a human reader browses content material on web content to a version within which prone and consumers (not unavoidably people) trade details. and due to this, writer Silvia Puglisi explains, it makes extra feel to construct structures rather than simply items or functions. systems are like ecosystems interconnecting varied purposes, companies, clients, builders, and companions, and supply many benefits.

In this e-book, you will tips on how to layout and increase Representational kingdom move (REST) systems in Rails. you are going to start with an creation to Ruby on Rails, after which movement fast via new strategies. on the finish of every bankruptcy, you should have discovered anything new approximately development and organically extending a multi-service platform spanning diversified devices—and can have had a few enjoyable within the technique. via the tip of the publication you will know the way to construct an structure composed of alternative companies gaining access to shared assets via a collection of taking part APIs and applications.

  • Explore the fundamentals of leisure and HTTP, together with leisure structure and the position of hypermedia
  • Get to grasp Rails and Ruby on Rails
  • Learn approximately API improvement and create an API
  • Take a radical examine relaxation, together with Asynchronous relaxation and trying out RESTful services
  • Work with info streams as you map them onto an software UI and combine exterior APIs on your application
  • Learn approximately device-independent development
  • Use facts analytics to acknowledge very important occasions, enhance key metrics, and song them
  • Explore quite a few instruments you should use to construct your personal facts analytic platform
  • Learn find out how to scale a Rails software successfully
  • Examine privateness and protection concerns and the results of dealing with and amassing person data

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We’ll name it video display. god: God. watch do |w| w. identify = "god-monitor" w. commence = "ruby /full/path/to/server. rb" w. keepalive finish this is often the naked minimal God configuration, stating a God. watch block (a watch represents a approach that you really want to observe and control). At minimal, for every watch you need to offer a different identify and a command that tells God easy methods to begin the method. The keepalive announcement tells God to maintain the method alive. If it’s now not operating whilst God begins, it is going to be began, and if it dies will probably be restarted. For extra configuration chances, see the God web site. Threads (in Ruby): adequate Already even if it’s now a section outdated, i like to recommend this nice web publication publish from Yehuda Katz approximately threads in Ruby. display screen Your Server Diagnostics tracking a server is ready to ensure that the method is fit. this is applicable in your net server, your middleware server, and your database server. reckoning on the configuration and the projects the server executes, there are various metrics that may wish to be monitored. reminiscence utilization and entry to I/O are just a few of these. you may additionally are looking to computer screen standard CPU usage throughout all CPUs or cores, in addition to on a per-CPU or per-core foundation. you could set signals to inform you while CPU usage reaches a undeniable point or while your program is overloading your server reminiscence. you may also are looking to hold keep watch over of the way time and again the server used to be unavailable or has restarted within the final time period. an inventory of universal metrics to watch contains: Uptime energetic clients Server time ordinary CPU utilization reminiscence utilization source utilization Let’s examine every one of those in flip. The uptime command: $ uptime supplies a one-line demonstrate indicating the present time, how lengthy the method has been working, what percentage clients are at present logged on, and the approach load averages for the earlier 1, five, and quarter-hour. you will find which clients are at present working strategies in your process through operating the next: $ playstation aux | awk '{ print $1 }' | sed '1 d' | style | uniq This makes use of the playstation command, with a number of filters: we eliminate every thing other than the 1st column of output (the usernames), get rid of the header, style the output, and put off reproduction traces, exhibiting in simple terms the clients checklist. you'll additionally clear out all procedure clients and merely express the names of standard clients (and/or the basis consumer) with lively methods: $ playstation aux | awk '{ print $1 }' | sed '1 d' | kind | uniq | perl -e 'for (<>) { chomp; $u = ( getpwnam($_) )[2]; print $_, "\n" if ( ( $u >= a thousand || $u == zero ) && ( $_ =~ /[[:alpha:]]/ && $_ ne "nobody" ) ) }' this could most likely output simply your approach identify and the foundation consumer. to determine the server’s neighborhood time and date, use: $ date What if you want to grasp the variety of CPUs to be had on your procedure? you could payment it in your example by way of operating the subsequent command: $ grep processor /proc/cpuinfo | wc -l to work out how a lot reminiscence your server is utilizing you should use the loose command, which screens RAM information in *nix machines: $ loose overall used loose shared buffers cached Mem: 7513644 7115076 398568 52424 381372 1134788 -/+ buffers/cache: 5598916 1914728 switch: 50331640 6500400 43831240 the 1st line offers information about reminiscence: overall RAM, used RAM, unfastened RAM, shared RAM, RAM used for buffers, and RAM used for caching content material.

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