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An example of a simple and scalable API. 2 Possible operations:

  • write request: ti represents the initial timestamp, ty is the event type
  • read: request: t1 represents the initial time, t2 the final time, ty is the type

Installation

  1. unzip and move into the dataTest folder
  2. create table in cassandra with cql file (i.e. run /[Cassandra-Home]apache-cassandra-2.1.2/bin/cqlsh -f cassandra.cql);
  3. in command line: sbt run
  4. from browser: go to http://127.0.0.1:8080/write?ti=1234567890&ty=ty5 it should show: "write message sent"
  5. http://127.0.0.1:8080/read?t1=0&t2=9999999999&ty=ty5 should show: { "type": "ty5", "minute": "20576131", "number": "1" }

Technologies

Spray-Akka: for building the RESTful layer, easily integrable with Akka; Akka: for building the workers layer. I used the routing and remoting principles to make a scalable application. I used 2 different Akka Actor System (for simplicity the are run on the same machine now) to show that the application could easily be distributed on more hosts. Cassandra: to manage the atomic updates of counter; the partition properly the records.