Home » Author Archives: Svend Vanderveken

Author Archives: Svend Vanderveken

Error handling in Storm Trident topologies


This post summarizes my current approach to error handling when designing Storm Trident topologies. I focus here on code design, not on deployment good practices like supervision nor redundancy. Because of the real-time stream nature of Storm, when facing most kinds of error we’ll ultimately have to move on to the next piece of data. Error handling in that context ...

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Scalable real time state update with Storm


In this post, I illustrate how to maintain in DB the current state of a real time event-driven process in a scalable and lock free manner thanks to the Storm framework. Storm is an event based data processing engine. Its model relies on basic primitives like event transformation, filtering, aggregation… that we assemble into topologies. The execution of a topology ...

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Web Service security and the human dimension of SOA roadmap


In most non-trivial SOA landscapes, keeping track of the constantly evolving integrations among systems can be hard unless there is in place a clearly identified way to publish and find the appropriate pieces of information. An overview of the IT landscape, defining what is currently or will be connected to what, is a prerequisite for being able to maintain the ...

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Transactional event-based NOSQL storage


I am presenting here a simple two steps architectural approach based on stored events as a workaround for the lack of full atomic transaction support in so-called “NOSQL” databases. Being fairly new to NOSQL-based architectures, I have the annoying intuition that I am about to write nothing but a set of obvious statements. On the other hand, I have not ...

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