Home » Author Archives: Andrey Redko (page 3)

Author Archives: Andrey Redko

Andrey Redko
Andriy is a well-grounded software developer with more then 12 years of practical experience using Java/EE, C#/.NET, C++, Groovy, Ruby, functional programming (Scala), databases (MySQL, PostreSQL, Oracle) and NoSQL solutions (MongoDB, Redis).

Your logs are your data: logstash + elasticsearch

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Topic of today’s post stays a bit aside from day-to-day coding and development but nonetheless covers a very important subject: our application log files. Our apps do generate enormous amount of logs which if done right are extremely handy for problems troubleshooting. It’s not a big deal if you have a single application up and running, but nowadays apps, particularity ...

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Implementing Producer/Consumer using SynchronousQueue

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Among plenty of useful classes which Java provides for concurrency support, there is one I would like to talk about: SynchronousQueue. In particular, I would like to walk through Producer / Consumer implementation using handy SynchronousQueue as an exchange mechanism. It might not sound clear why to use this type of queue for producer / consumer communication unless we look ...

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Going REST: embedding Jetty with Spring and JAX-RS (Apache CXF)

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For hardcore server-side Java developer the only way to ‘speak’ out to the world is by using APIs. Today’s post is all about JAX-RS: writing and exposing RESTful services using Java. But we won’t do that using a traditional, heavyweight approach involving application server, WAR packaging and whatnot. Instead, we will use awesome Apache CXF framework and as always rely ...

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Packing your Java application as one (or fat) JAR

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This post will target an interesting but quite powerful concept: packing your application as single, runnable JAR file, also known as one or fat JAR. We get used to large WAR archives which contain all dependencies packed together under some common folder structure. With JAR-like packaging the story is a bit different: in order to make your application runnable (via ...

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Redis pub/sub using Spring

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Continuing to discover the powerful set of Redis features, the one worth mentioning about is out of the box support of pub/sub messaging. Pub/Sub messaging is essential part of many software architectures. Some software systems demand from messaging solution to provide high-performance, scalability, queues persistence and durability, fail-over support, transactions, and many more nice-to-have features, which in Java world mostly ...

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BTrace: hidden gem in Java developer toolbox

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This post is about BTrace which I am considering as a hidden gem for Java developer. BTrace is a safe, dynamic tracing tool for the Java platform. BTrace can be used to dynamically trace a running Java program (similar to DTrace for OpenSolaris applications and OS). Shortly, the tool allows to inject tracing points without restarting or reconfiguring your Java ...

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Using Redis with Spring

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As NoSQL solutions are getting more and more popular for many kind of problems, more often the modern projects consider to use some (or several) of NoSQLs instead (or side-by-side) of traditional RDBMS. I have already covered my experience with MongoDB in this, this and this posts. In this post I would like to switch gears a bit towards Redis, ...

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JSON for polymorphic Java object serialization

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For a long time now JSON is a de facto standard for all kinds of data serialization between client and server. Among other, its strengths are simplicity and human-readability. But with simplicity comes some limitations, one of them I would like to talk about today: storing and retrieving polymorphic Java objects. Let’s start with simple problem: a hierarchy of filters. ...

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Using Delayed queues in practice

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Often there are use cases when you have some kind of work or job queue and there is a need not to handle each work item or job immediately but with some delay. For example, if user clicks a button which triggers some work to be done, and one second later user realizes he / she was mistaken and job ...

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