Posts tagged eda
Communication between taskflows and pages, beans and other components in ADF Faces applications is in many cases ideally implemented using contextual events. These events are published from a producer component – a page, taskflow or associated bean – and made available to all interested parties. Events are handed over by the ADF run time infrastructure to any registered consumer in the current scope. This includes any taskflow or enclosing page which has been configured as such. This publish/subscribe model helps achieve interaction and reuse in a decoupled way. I like the principle. I have applied it on several occasions. And today I needed it again in a WebCenter Portal application with custom ADF 11g components. And once again I could not remember exactly how to implement the contextual events, the publication and subscription. This article therefore is primarily for me – so I can quickly recall how to do this in similar subsequent situations. However, if it is useful to you too, that is even better!
The use case discussed in this article is as follows:
The section in the red rectangle is a taskflow that has been embedded as a region in the page. This taskflow has indicated More >
On the Oracle Technology Network, architecture section, my article titled “Fanning Out Events on the Oracle SOA Suite 11g Event Delivery Network” has just gone live:
This article describes:
how events can be used in Oracle SOA Suite 11g to have business processes impact each other in a meaningful way with maximum decoupling. Specifically, this article describes a solution for fanning out Event Delivery Network (EDN) events to a more fine-grained level. This allows a single event to influence multiple running instances of a Business Process Execution Language (BPEL) process. The article uses the following Oracle SOA Suite 11g components: BPEL , Mediator ,Event Delivery Network, Spring , Locator API , Composite Sensors
This article contains the resources for an article on Complex Event Processing (using Oracle CEP) that is published in the March 2010 issue of the Dutch Java Magazine. This article describes the interaction between CEP and Java Applications, using examples of temperature sensors that are monitored (aggregating their readings and looking out for any broken sensors) and web shops that try to determine the most popular and the most efficient search terms as well as the search terms that are quite useless (as they never result in a transaction).
The article is in Dutch – it will be made available for download later on. Note that it is based on Chapter 19 in the upcoming Oracle SOA Suite 11g Handbook (Oracle Press, due Summer 2010).
Temperatuur Simulator en Temperatuur Sensor Processor: TemperatuurSensorenSimulatorEnProcessor
WebApplicatie Analyzer: WebWinkelAnalyse.zipReferences & Resources
Download Oracle CEP en CEP Plugin for Eclipse:
Oracle CEP Server: http://www.oracle.com/technology/software/products/cep/index.html
Oracle CEP Plugin voor Eclipse: http://download.oracle.com/technology/software/cep-ide/11/
Setting up your development More >