{"id":14,"date":"2006-08-01T15:32:00","date_gmt":"2006-08-01T19:32:00","guid":{"rendered":"http:\/\/onlineappsdba.com\/?p=14"},"modified":"2007-10-20T20:20:53","modified_gmt":"2007-10-21T00:20:53","slug":"oracle-applications-request-flow","status":"publish","type":"post","link":"https:\/\/onlineappsdba.com\/index.php\/2006\/08\/01\/oracle-applications-request-flow\/","title":{"rendered":"Oracle Applications Request Flow"},"content":{"rendered":"<p>Now since you know Basic Overview of Oracle Applications \/ apps 11i and Installation (If not read my previous posts) . When user makes a request how request flow across different component in E-Business Suite or Oracle applications .<br \/>\nBy now you might be aware of different Services\/Component in Oracle apps I repeat them here these are ,<br \/>\n1. Oracle Web Server ( Apache, Jserv, plssql ) <strong>IAS_ORACLE_HOME <\/strong>9iAS, Ver. 10222<br \/>\n2. Forms Server ( 8.0.6 ) <strong>ORACLE_HOME<\/strong><br \/>\n3. Report Server ( in side 8.0.6 ORACLE_HOME)<br \/>\n4. Concurrent Manager for Batch or Individual Job Processing<br \/>\n5. Admin Server ( These are used for application dba job like patching , cloning &amp; lot more )<br \/>\n6. Database Server<\/p>\n<p>A) So when User makes a request from browser by typing URL like http:\/\/ hostname : port so port number they mention is WebServer Port, request hit to Oracle WebServer ( these requests are recorded in logs where wait for next post<strong> <\/strong>)<br \/>\nB) Webserver checks that with http request there is no cookie attached (<strong>Cookie <\/strong>is message given by <strong>WebServer<\/strong> to Web Browser to identify client) so user is new &amp; it passes login page to User .<br \/>\nC) User types his Username Password in login window &amp; clicks submit button<br \/>\nD) Webserver checks that username and passwords need to authenticate against database FND_USER table , so it needs first some user to check client&#8217;s username password in database . Guess which username password it uses ?? ( <strong>GUEST\/ORACLE <\/strong>have you ever noticed why this user is there , Hope you know it now it Uses Guest User to autenticate your user in database )<br \/>\nE) Once user is authenticated its check against FND_RESPONSBILITY..(Confirm again , not sure table name) for Authorization about users responsibilities &amp; assigned responsibilities are presented back to user.<br \/>\nF) Now these responsibilities are of two type Self Services(served by <strong>Jserv\/Servlets<\/strong>) or Core Applications Server by Forms Server .<br \/>\nG) If this is Core responsibility , Apache transfers request to Forms Listener (Listening on Forms port, I will cover how to check Forms Port in my coming posts ), From here request is on Sockets (May be on forms servelets depending on forms config. ) which is persistense connection. From here onwards Client talks directly with Forms Server in forms session and if Client requested some data, forms server makes database connection ( How ?? using tnsnames.ora in <strong>806 HOME <\/strong>or using <strong>dbc <\/strong>Database Connector file in <strong>FND_SECURE_TOP<\/strong> or <strong>wdbsvr.apps <\/strong>in Apache\/modplsql\/cfg ?) <strong><span style=\"color: #000099\">Post your answer in comment section, you can do it as anonymous user without login as well<\/span><\/strong><br \/>\nH) If User selected Self Service Responsibility like iProcurement, iRecruitement.., Apache forwards request to <strong>mod_jserv<\/strong> and request is fullfilled by jserv_component.<br \/>\nHave you ever noticed why webserver donot ask client to login again until session timeout ??( I know you know answer now its because of cookies as User have valid cookies , try deleting cookies from browser &amp; see Oracle Apache asks you to relogin .<br \/>\nI) When your webserver tries to connect to database for plsql or any other type of connection it asks mod_pls to fulfill request but where is this connection information stored ? ( dbc file or wdbsvr.app file or somthing else ? )<br \/>\nJ) Users submits his requests for batch processing or somthing else ( Gather Stats done by Sysadmins or Apps DBA&#8217;s) these kind of requests are fullfilled by <strong>Concurrent Manager<\/strong> ( More about CM, including CM tuning still to come in future )<br \/>\nG) When user want to see reports of all these things request is being forwarded to <strong>Reports Server <\/strong>.<\/p>\n<p>You as Sysadmin or Oracle Apps DBA need not to worry how this request transmission happens from one service to another , this is transparent to you me or User . ( Let Oracle do this behind the scene ) You should know request flow as this is most crucial during Troubleshooting (I&#8217;ll cover in future posts ) to pinpoint in which compnent issue is &amp; where to look for .<\/p>\n<p>If you like this post please tell it to your other Apps DBA friends &amp; Other budding Oracle Apps DBA&#8217;s . Please don&#8217;t forget to leave comment &amp; for Advanced Apps DBA , WebServer configuration file system &amp; configuration files look my post at <a href=\"http:\/\/atul-oracle.blogspot.com\">http:\/\/atul-oracle.blogspot.com<\/a><\/p>\n<p><strong><br \/>\nLearn Oracle Apps DBA<br \/>\nFree Apps DBA Training<\/strong><\/p>\n<p class=\"blogger-post-footer\">http:\/\/teachMeOracle.com\/forum<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Now since you know Basic Overview of Oracle Applications \/ apps 11i and Installation (If not read my previous posts) [&hellip;]<\/p>\n","protected":false},"author":115,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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