How should you map Application Components to Collaboration Suite Middle Tier Components?

I. The OC4J Instances

The more important ones that should usually be running at all times are the following:

1. OC4J_Content: The Content Services application that runs the various file-serving protocol servers.
   
2. OC4J_Mail: The Mail application that runs the various e-mail protocol servers
   
3. OC4J_OCSADMIN: The Ultrasearch application.
   
4. OC4J_OCSCLIENT: The starting point of the user interface to Oracle Collaboration Suite that must be running if any of the web clients are to be used.
   
5. OC4J_Portal: A PL/SQL application that requires several Java modules,including the PPE that renders the pages to be returned to the user, to be running on the middle tier
   

An Oracle Collaboration Suite infrastructure instance will be configured with one OC4J instance that should be running at all times. This is the OC4J_SECURITY instance that runs the OIDDAS application.

Note that there is also a HOME OC4J instance created in both middle tier and infrastructure instances. It should never be necessary to start this.

II. Mapping Application Components to Middle Tier Components

a) The Web Cache and HTTP Server (the Apache web listener) manage the HTTP traffic between browsers and middle tier instances.

b) Portal, consisting of the component that generates pages and the parallel page engine, is necessary to construct the web pages seen by end users.

c) The Calendar server itself consists of a set of processes visible in the Application Server Control window as just one component: the Calendar Server.

To see the individual processes, use the opmnctl utility:

$ opmnctl status ias-component=CalendarServer

d) Content Services is two components: the server component and a web interface component that runs within an OC4J container. These are shown in Application Server Control as the components Content and OC4J_Content.

e) The Mail application also consists of two components: Mail Application and OC4J_Mail. The Mail application is the Mail protocol servers. The OC4J_Mail component provides the Mail web interface.

g) The Real-Time Collaboration components are OC4J_imeeting and Real-Time Collaboration.The imeeting component manages the web interface for web conferencing; the Real-Time Collaboration component is the server process that enables real-time communication between users.

h) The Search component, based on the Ultrasearch web crawling facility that can crawl through database and web content, is accessed through the OC4J_OCSADMIN component.

i) The wireless capability is two components: OC4J_Wireless and Wireless.

j) Workspaces are implemented in PL/SQL and therefore cannot be controlled through OPMN or Application Server Control.

k) The Management component is the Enterprise Manager daemon. Since this is the Application Server Control process it clearly cannot be started or stopped through Application Server Control; you must manage it with the emctl utility.