First version of Oracle E-Business Suite 12.2 was released about one year ago at September 2013. As a result of Oracle Sales Managers hard work, it’s planing to start implementations of this new version to clients/partners probably will be at the end of this year. In Release 12.2, Web and Forms services are provided by Oracle Application Server and Oracle Fusion Middleware. They are no longer servers in the sense of being a single process, as was the case in previous releases. There is no other spesific changes on client or database tiers.
We can figure this changes and current EBS 12.2 Architecture as follows ;
Association between Client and Application Tiers are different then other R12 versions. It seems Forms and Web Services are integrated with Fusion Middleware services ;
When we also want to check the “new” Application Tier ,we are still seeing that there are two ORACLE_HOMEs like other older R12 versions. Oracle documents are writing that enabling this two ORACLE_HOMEs are about advantages of lasted Oracle Technologies.
In EBS 12.2 Web Service components of Oracle Application Server processes requests are mainly includes two components. These are ;
- Web Listener : Our old friend Oracle HTTP Listener Apache
- Java Servlet Engine : Our new crush(!) Oracle Weblogic Server .
Web listener(Apache) basicly gives information by accepting HTTP requests from client browsers and gives to integrated Weblogic Service-WLS for security and context . And also Apache still can supply HTML content for basic requests, it only routes to Servlet if requested content is advanced level. If HTTP request(url) is including technologies like ADF and OAF or hybrid of ADF/OAF, Weblogic takes responsibilty by obtaining data from database and making the meal with the context from metadata dictionary (constructs HTML page), then sends back HTML page to our precious end user browsers with the help of Apache(Listener). This figure shows how it works ;
What kind of holy product is this Weblogic Server and what is its real occupation in these old sustainable/traditional EBS Architecture?
Yes we can answer this question in an easy simple way; Weblogic services are replaced with OC4J (Oracle Container for Java) as new Servlet Engine. All HTML-Based Applications and Oracle Application Framework (OAF) is still using Java servlets provided by Apache Jserv module and BC4J patterns (Business Components for Java) but Oracle Weblogic provides connection to database and application-specific functionality such as flexfields via WLS service. Weblogic is integrated with this tier planning to create hybrid applications using OAF-ADF and optimizing clustring performances . I think possible further requirements in the future for EBS to Fusion evolution is also key reason for Oracle’s decision on this change.
In 12.2 , OA Framework Architecture includes Weblogic services such as WLS,UIX,Java Controller, Metadata UI. And it looks like this ;
When we compare 12.2 with other R12 versions we can’t not see any changes for Forms Services . There is no change in Form Listener Servlet .They are still connecting database with Oracle Net networking infrastructure.But! Weblogic manages this processes ;
A server is an instance of WebLogic Server that runs in its own Java Virtual Machine (JVM) and has its own configuration. And there five WebLogic instances these are ;
- oacore (also cluster)
- oafm (also cluster)
- forms (also cluster)
- forms–c4ws (also cluster)
Referenced Oracle Documents about Weblogic thing in Oracle E-Business Suite:
- Part No. E12841-04
- Part No. E22949-09