APJ - JMS - RMI services

RMS - Java Remote Method Invocation
JMS - Java Messaging Service
AJP - Apache Jserv Protocol

RMS :
Java specific API that expects the caller and receiver to be available at the time of communication.

JMS :

JMS is a reliable messaging subsystem. Messages can be passed even if one of the parties is not available.

AJP :

The http protocol is quite expensive in terms of band width - it's an ascii text protocl with words like "POST" and phrases like "Content-type:" taking up more bandwidth than is really needed, and having to be interpreted at destination too.
So the ajp protocol (Apache Java Protocol) was established to allow for much less expensive exchanges between upstream and downstream servers that are to be closely linked.

UR's Key Run ;-) 

Y fly JSP compilation doesn't happen in R12 ?

In R12

JSP compilation is set to "justrun" which disables fly compilation of jsp's in R12 unlike 11i.
One of the reasons being, to have better performance. Also we don't move _pages in R12 as in 11i for the same reason.

If you want to have fly compilation in R12 as well

- Change s_jsp_main_mode in $CONTEXT_FILE from "justrun" to "recompile"
- Run Autoconfig

-- U can verify the changes after autoconfig  in


$INST_TOP/ora/10.1.3/j2ee/oacore/application-deployments/oacore/html/orion-web.xml

<init-param>
<param-name>main_mode</param-name>
<param-value>recompile</param-value>
</init-param>

Note : For compiling JSP's manually in Linux


. ./oracle/apps/apps_st/appl/APPS<SID>_<host>.env

cd $FND_TOP/patch/115/bin
perl ojspCompile.pl --compile --flush -p 2


UR's Key Run ;-)