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Book Review: Java Performance by Charlie Hunt and Binu John
If you want to: – learn about commands used for OS monitoring – understand about different components of JVM – monitor and tune JVM to improve its performance. then, Java Performance is the book you...
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Simple Aspect Oriented Programming (AOP) using CDI in JavaEE
We write service APIs which cater to certain business logic. There are few cross-cutting concerns that cover all service APIs like Security, Logging, Auditing, Measuring Latencies and so on. This is a...
View ArticleParameterized Test Runner in JUnit
We all have written unit tests where in a single test tests for different possible input-output combinations. Lets look how its done by taking a simple fibonacci series example. The below code computes...
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Book Review: RabbitMQ Essentials by David Dossot
I have been working on integrating with RabbitMQ to implement the messaging architecture. All the time I made use of the basic tutorials available on RabbitMQ site to wade through understanding...
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Book Review: RESTful Web Services with Dropwizard by Alexandros Dallas
RESTful Web Services with Dropwizard` by Alexandros Dallas is a good guide to get started with dropwizard. The author covers most of the features of dropwizard which includes creating RESTful End...
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Book Review: Murach’s Java Servlets And JSP 3rd Edition
Murach’s Java Servlets and JSP is the ONLY book you need to learn Web App Development in Java using JSP and Servlets. The book covers all the concepts required you to build a complete Web application...
View ArticleVery useful Console Window for windows
ConEmu (http://www.fosshub.com/ConEmu.html) is a very useful and much much better Console window for Windows. It acts as a facade over the cmd.exe. There are loads of good things in it and highly...
View ArticleUsing Google Guava Cache for local caching
Lot of times we would have to fetch the data from a database or another webservice or load it from file system. In cases where it involves a network call there would be inherent network latencies,...
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Getting rid of Getters and Setters in your POJO
We all have read in Java books about encapsulation of fields in Java class and also when ever you code you are asked to take special care in encapsulating the fields and providing explicit Getters and...
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Setting up sharded mongodb cluster in localhost
I have been playing around with MongoDb, thanks to the M101J Course offered by Mongodb University. These NoSQL datastores are gaining popularity due to a number of reasons and one among them being the...
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Book Review: Murach’s HTML5 and CSS3, 3rd Edition
Murach’s HTML5 and CSS3, 3rd Edition is a one stop solution to solve all your learning requirements for developing the front end of your applications. The books starts with introduction to HTML and CSS...
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Monitoring and Profiling using VisualVM-1
I executed a simple GUI application which would load the CSV file and parse it and show the contents in a JTable. When the applications started- There was a JFrame, 2 JPanels, a JLabel and a JButton...
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“val” versus “var” Declarations in Scala
Scala allows programmers to decide whether the variable is immutable or mutable. This can be done by using the keywords "val" and "var". Continue reading to know more about "val" and "var".
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Tuples- Returning multiple values in Scala
When I was coding in Java I used to build Classes just to return multpile values and also sometimes used pass by reference (by means of using Objects). I really missed a permanent solution :( Scala has...
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Control Structures in Scala- A brief overview
If Statements: Lets consider a first entry example of If statments, without using much of Scala’s features. This is a pretty simple and straight forward examples. Now lets add some Scala flavor in the...
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How’s Scala different from Java?
Scala is statically type like Java but with Type Inferencing support. Which means that the scala compiler analyzes the code deeply to determine what type a particular value is. In Scala its not...
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Traits in Scala- Deep Dive
Traits are units of code reuse in Scala. Traits encapsulates methods and field definitions. Their role is similar to that of interfaces in Java- A workaround for Multiple Inheritance. But unlike...
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Null, null, Nil, Nothing, None, and Unit in Scala
Null– Its a Trait. null– Its an instance of Null- Similar to Java null. Nil– Represents an emptry List of anything of zero length. Its not that it refers to nothing but it refers to List which has no...
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Working with Java Enumerated types (Enums)
In this post I would like to explain about Enums in Java. Though in my 2 years of coding in Java I have seldom used Enums but they do provide a lot of features when we are required to create a say...
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Execute external process from within JVM using Apache Commons Exec library
Executing external command from within JVM often causes problems- be it in terms of the code to write and manage or in the ease of implementation. I had similar requirement in my Major project for my...
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