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Architecture & Design

The Process of Creating Decentralized Apps (dApps)

A decentralized application has a different architectural approach; they are working on distributed ledger technology called blockchain, where there is no central point of failure nor third parties involved. A revolutionary and attractive technology for new opportunities. This article covers creating such applications and why they are needed, as well as challenges during implementation.

Ognyan Chikov
on Feb 22, 2023
Culture & Methods

Open-Source Testing: Why Bug Bounty Programs Should Be Embraced, Not Feared

The growing importance of the Web3 ecosystem based on blockchains shows how important community test programs are. Some within the testing community see this trend as a threat. However, it is actually an opportunity. Bug bounties and open-source test contributions are a great tool for test teams, and there is every reason for testers to embrace this new trend rather than to fear it.

Rhian Lewis
on Jul 19, 2022
Java

IAP: Fast, Versatile Alternative to HTTP

Jakob Jenkov's organization has analyzed the modern application stack, including high level architectures, concrete technologies like databases, query languages, messaging, distributed computing models, & network protocols, and constructed the next gen alternative to HTTP. IAP is the resulting emerging standard protocol, and ION the high speed alternative to JSON and Protocol Buffers.

Jakob Jenkov
on Feb 02, 2016
Metadata-Driven Design: Designing a Flexible Engine for API Data Retrieval

Bulk data is commonly accessed via files & FTP. As the world moves toward APIs to facilitate collaboration, what are the requirements for data APIs? This article describes a meta-data driven architecture for bulk data ingestion. Two APIs operate in parallel to provide data changes as well as the data records themselves. An example demonstrates how API responses are parameterized using meta-data.

Aaron Kendall
on Apr 13, 2015
Using DNS for REST Web Service Discovery

Service Discovery is an essential aspect of service orientated architecture because it avoids early binding of clients to particular service instances. In this article, Jan Algermissen explains the need for discovery of RESTful services, and explains how the existing Domain Name Service (DNS) standard can be used as a widely-deployed and scalable solution.

Jan Algermissen
on May 03, 2010
Schema for Web Services – Part I: Basic Datatypes

Most web service developers rely on a data binding conversion layer within a web service to work directly with data structures in their programming language of choice - but this causes a number of problems. In the first of a series of articles that look at these problems, Dennis Sosnoski starts at the most basic level, looking at simple data types and the issues that arise from mapping them.

Dennis Sosnoski
on Jan 15, 2009
Contract Versioning, Compatibility and Composability

Kjell-Sverre and Jean-Jacques revisit the principles of contract design focusing on the concept of compatible contract based on XML, XML Schema and WSDL extensibility to foster service reuse and complement Governance. The article includes a novel approach to manage message types in relation to an enterprise data model.

Kjell-Sverre Jerijærvi Jean-Jacques Dubray
on Dec 09, 2008
Structured Event Streaming with Smooks

Smooks is best known for its transformation capabilities, but in this article Tom Fennelly describes how you can also use it for structured event streaming.

Tom Fennelly
on Nov 26, 2008
Flex for XML and JSON

Platforms need interoperability. In this article Flex interoperability with JSON and XML is explored. The article including mapping of XML to chart and grid components using the E4X library. It also demonstrates using the as3core library to decode JSON messages.

Jack Herrington
on Oct 12, 2008
AtomServer – The Power of Publishing for Data Distribution – Part Two

In this article, Bryon Jacob and Chris Berry continue their description of AtomServer, their implementation of a full-fledged Atom Store based on Apache Abdera. The authors have created several extensions to the AtomPub specification, among them Auto-Tagging, Batching, and Aggregate Feeds.

Chris Berry Bryon Jacob
on Sep 26, 2008
Service-Oriented Development with Consumer-Driven Contracts

In this article, Ian Robinson discusses how "consumer-driven contracts", in the form of "stories for services" and unit tests exchanged between service development streams, can strengthen the service-oriented development lifecycle. In contrast to contracts defined from the POV of the provider, consumer-driven contracts result from combining the demands of all known service consumers.

Ian Robinson
on Jul 27, 2008
Rationalizing the Presentation Tier

Thin client paradigm characterized by web applications is a kludge that needs to be repudiated. Old compromises are no longer needed and it's time to move the presentation tier to where it belongs. In this article, Ganesh Prasad and Peter Svensson explains how and why.

Ganesh Prasad Peter Svensson
on Jul 04, 2008

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