Developer Focus on AJAX and Rich Internet Technologies

Michael Poulin

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Top Stories by Michael Poulin

This article describes a workaround design that allows a Portal to survive if its resource starts hanging request threads. Business Task How frequently does your Portal experience user requests hanging in the resource? Not frequently, I hope. However, if this happens and the resource continues hanging user requests, the Portal is exposed to a fatal risk of spending all of the configured concurrent user requests and eventually dies. This is a disaster. I faced such situation a few times and decided to protect my Portal from even rare surprises such as these. Let a Portal include several Portlets with login control provided via a backing file for each Portlet. The backing file is created per request and is thread-safe with regard to the user requests. In the login control, the baking file's init() method (or preRender() method) calls an API of separated security servi... (more)

Considering the SOA Reference Model

(SYS-CON Media) - The main drivers for SOA-based architectures are to facilitate the manageable growth of large-scale enterprise systems, to facilitate Internet-scale provisioning and the use of services, and to reduce the cost of organization-to-organization cooperation - SOA RM When approaching a SOA implementation, I would like to consider two fundamental questions that many developers ask: 1)  What's the difference between service-oriented and service-based architectures? 2)  What special architecture elements are defined by the SOA RM? In my opinion, the answer to the first is ... (more)

Resolving RIA-SOA Conflict

From the first days of Rich Internet Application (RIA) technology, many enthusiasts found an analogy between RIA and service-oriented architecture (SOA). Some of them talked about the benefits of a would-be-wonderful use of SOA in RIA; others saw RIA as a SOA face. Nonetheless, there are experts who see a discrepancy between RIA and SOA concepts. The major disagreement between RIA and SOA is in the fine-grained operations in RIA and the coarse-grained type of interfaces of SOA business services. Let's take a closer look at this problem. In a glance we can see that the RIA spectr... (more)

How To Deal With Architectural Security?

Application architects have heard about the increased importance of security, but in many cases they really don't know how to approach this issue. In this article, I'll share my experience and define a few basic steps and checkpoints for building application architecture with security in mind. This year, architects have started to face several domestic (SOX and HIPPA) and even international (Basel II) regulations that require a certain level of protection of the personal and financial data that's processed and owned by the companies. Though network and operating system security so... (more)

Entitlement to Data

The requirements for different user-facing applications frequently say something like: "User has to see/read/be shown only funds/records/itineraries/policies he or she is entitled to." Permissions in these cases usually depend on multiple factors related to the user profile (job role, locale, etc.), to the protected data (data origin, storage, approval status, etc.), or to both. This represents the fine granular entitlement requirements that are rarely supported by commercial systems. In this article I will discuss different methods of entitlement to persistent data. The describ... (more)