Future

Future vs CompletableFuture in Java- #2

Reading Time: 3 minutes In our previous blog – Future vs CompletableFuture – #1, we compared Java 5’s Future with Java 8’s CompletableFuture on the basis of two categories i.e. manual completion and attaching a callable method. Now, we will be comparing them on the basis of next 3 categories i.e. Combining 2 CompletableFutures together Combining multiple CompletableFutures together Exception Handling Let’s have a look at each one of Continue Reading

Future vs CompletableFuture in Java – #1

Reading Time: 4 minutes This is Part 1 of Future vs CompletableFuture. In this blog, we will be comparing Java 5’s Future with Java 8’s CompletableFuture on the basis of two categories i.e. manual completion and attaching a callable method. What is CompletableFuture? CompletableFuture is used for asynchronous programming in Java. Asynchronous programming is a means of writing non-blocking code by running a task on a separate thread than Continue Reading

Scala, Couchbase, Spark and Akka-http: A combinatory tutorial for starters

Reading Time: 5 minutes Couchbase and Apache Spark are best so far , for the in-memory computation. I am using akka-http because its new in the business. If you are not a big fan of akka-http and don’t think it is yet ready for production then you can take a look on this blog, which displays how to do the same task using Spray. If you are new to all Continue Reading

Scala Future Under The Hood

Reading Time: 3 minutes In the previous post, i was discussing about Scala ExecutionContext. As we know, for multithreading we need to maintain thread pools using ExecutionContext and by default ForkJoinPool is used because for accessing “multi core” processor. There are multiple thread pools are available in our java.util.concurrent.Executors utility class and as per our requirement we can create new one also. After all, Scala have concept of Future. Continue Reading

File upload using akka-http in Scala

Reading Time: 2 minutes Lets begin with some introduction of Akka-http first. Akka HTTP is a layer to expose Actors to the web via HTTP and to enable them to consume HTTP services as a client. It is not an HTTP framework, it is an Actor-based toolkit for interacting with web services and clients. This toolkit is structured into several layers: akka-http-core: A complete implementation of the HTTP standard, both Continue Reading

Getting started with ReactJS, Play 2.4.x, Scala, Anorm and WebJars

Reading Time: 2 minutes playing-reactjs This blog describes a basic example to render UI using React(A JavaScript library for building user interfaces) with Play 2.4.x, Scala, Anorm and WebJars. It also demonstrates the use of evolution in Play 2.4.x This is a classic CRUD application, backed by a JDBC database. It demonstrates: Handling asynchronous results, Handling time-outs Achieving, Futures to use more idiomatic error handling. Accessing a JDBC database, Continue Reading

Tutorial #3: Getting started with HTTP Programming in Play Framework

Reading Time: < 1 minute We have already discussed about the Play development environment in Tutorial #1 and use of WebJars, jQuery, Bootstrap & Bootswatch with Play in Tutorial #2 So, In this blog we would discuss about HTTP programming in Play Framework which would drive us through rest of the tutorial series.  We would be running this blog as a series and we would be looking at various aspects Continue Reading

AWS Services: AWS SDK on the Scala with Play Framework

Reading Time: 3 minutes playing-aws-scala The following blog and attached code represent a simple example of Amazon Web Services in the Scala way with Play Framework using AWScala but in this blog I have implemented only Amazon Simple Storage Service (Amazon S3) functionalities. AWScala: AWS SDK on the Scala REPL AWScala enables Scala developers to easily work with Amazon Web Services in the Scala way. Though AWScala objects basically Continue Reading

Playing JSONP : A basic example to integrate JSONP mechanism in Play Application with the help of play-jsonp-filter module

Reading Time: 3 minutes Playing JSONP Basic example to integrate JSONP mechanism in Play Application with the help of play-jsonp-filter module play-jsonp-filter This filter enables JSONP on your existing API: any resource that returns a JSON content will return a JavaScript fragment if there is an additional callback parameter in the query string. For example, if the resource /foo gives the following JSON result: {“foo”: “bar”}, the resource /foo?callback=f Continue Reading

Scala in Business | Knoldus Newsletter – March 2015

Reading Time: 2 minutes Hello Folks We are back again with March 2015, Newsletter. Here is this Scala in Business | Knoldus Newsletter – March 2015 In this newsletter, you will get the business related news for Scala. How organisation are adopting Scala for their business, how Scala related technologies increasing the performance of application and how Scala is getting popular in the industry So, if you haven’t subscribed to Continue Reading

Play with Reactive Slick: A Simple CRUD application in Play! framework using Slick 3.0

Reading Time: 2 minutes Recently Typesafe released Slick 3.0.0-RC1, the first release candidate for “Reactive Slick”. Reactive Slick has many new features like Support for Reactive Streams API, a new API for composing and executing database actions and many more. Before moving forward, we recommended you to go through the Slick 3.0.0-RC1 Upgrade guide. So, that you can get a hint of major changes in Slick 3.0. In this post, we will see Continue Reading

Play-Slick-PostgreSQL: Reactive Play application with Slick extensions for PostgreSQL

Reading Time: < 1 minute playing-slick-pg Building Reactive Play application with Slick extensions for PostgreSQL This is a classic CRUD application, backed by a PostgreSQL database. It demonstrates: Handling asynchronous results, Handling time-outs Achieving, Futures to use more idiomatic error handling. Accessing a JDBC database, using Slick. Achieving, table pagination and sorting functionality. Embedded JS & CSS libraries with WebJars. Play and Scala-based template engine implementation Integrating with a CSS Continue Reading