technology

Akka Persistence using MongoDB – Part I

Reading Time: 3 minutes Akka is a powerful actor based tool kit for Concurrency, Parallelism and Clustering. But for every concurrent applications, Akka actors are not fit because Futures are another alternative for performing Concurrency. Most of the developers follow simple rules for using Future and Actors is “Futures for Concurrency, Actors for State“. In concurrent applications most of the time we are facing race conditions and deadlocks. Because Continue Reading

Knoldus Partners with Confluent to Power Real-Time Streams

Reading Time: 3 minutes Knoldus is pleased to announce a Consulting and System Integrator partnership with Confluent, the company founded by the creators of Apache KafkaTM Confluent, creators of the first streaming platform based on Apache KafkaTM, provides the most complete platform to build enterprise-scale streaming pipelines using Apache Kafka and simplify the development of stream processing applications. Via rapid adoption in the Fortune 500, Apache Kafka is quickly emerging Continue Reading

Kick-Off Java 9 (Project Jigsaw & ServiceLoader) Part – II

Reading Time: 3 minutes Java  comes with major changes and new surprises for developers. Major changes came in  Java 5 and Java 8, but now Java 9 will come with new mysteries and changes. In the last post we were discussing about Java 9 with Jigsaw and in another post we were using ServiceLoader in Java instead of dependencies injections. Java 9 gives us a clean way for using Continue Reading

Play With Java ServiceLoader forget about Dependency Injection(DI) Frameworks

Reading Time: 2 minutes In most of the applications we are using Dependency Injection for loosely couple of our code. Some time, we just require simple DI, nothing else, for those, we need to include some of our DI frameworks like Spring, Google Guice etc. This makes our project jar heavy and added some unnecessary classes as well. For all these, Java itself have a ServiceLoader class for inject Continue Reading

Kick-Off Java 9 (Project Jigsaw) Part – I

Reading Time: 3 minutes Now a day’s monolithic applications comes into micro batches. Every micro batch independent from each others and deploy. Now the Java will come in this flavor using project Jigsaw Java 9 comes with great feature called “Jigsaw“, which modularize monolithic Java code into modules. Where we design independently standard modules with in different scopes. Primary goal of “jigsaw” to make scalability, maintainability, performance, security etc. 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

Java Executor Vs Scala ExecutionContext

Reading Time: 3 minutes Java supports low-level of concurrency and some of rich api’s which is just a wrapper of low-level constructs like wait, notify, synchronize etc, But with Java concurrent packages Scala have high level concurrency frameworks for “which goal to achieve, rather than how to achieve“. These types of programming paradigms are “Asynchronous programming using Futures“, “Reactive programming using event streams“, “Actor based programming” and more. Note: Continue Reading

ScalaKnol: Why returning a value in finally is a bad idea

Reading Time: < 1 minute For those of us who are coming from an imperative background, we are used to using try catch rather losely. Ok, I am not trying to generalize here but a majority of us do so. When we come to the Scala world, we realise that like other expressions in scala, try-catch-finally would result in a value. The general practice recommended is that finally should be Continue Reading