PL/SQL applications do not live on an island - any longer. Increasingly, applications need relate to the rest of the world. Either to make themselves and the services they provide accessible to external parties - that may not speak PL/SQL at all - or to access information or enlist help from external services.
Fortunately, PL/SQL can do much more than invoke other PL/SQL applications or execute SQL. PL/SQL - sometimes in conjunctions with other components in the Oracle RDBMS - provides many inbound and outbound channels for such interactions. This session discusses and demonstrates a number of channels - when and why to use them and how to use them.
The presentation discusses how to publish data to consumers via HTTP, using both XMLDB and the Embedded PL/SQL Gateway - for example to deliver HTML, XML or RSS or to provide REST-style (web)services that are much in demand. The session also discusses the importance of email as a vehicle for human-application interaction, demonstrating how to send and how to act on received emails. An important topic is how to engage in queue based interactions (for example with a SOA infrastructure) and it concludes with how through utl_http or XMLDB and (simple) middleware, the world of SOA, REST and even the internet is ours as well. It includes a demo on 'chatting from the database' (database triggers that send out IM alerts to human agents).