Last updated on September 29th, 2018 at 08:23 am
Forms Server Architecture
Forms Server use a three-tier architecture, consisting of the following components:
• Client – A Java Applet running on the client PC that handles the UI presentation.
• Middle tier – The Web Listener and the Form run-time that handles the logic.
• Database tier – Data-intensive logic and data management.
The Forms run-time consists of several components:
• The Forms Server listener (f60srvm) on the middle tier. There is one process per database instance; it is used by new users to connect, and by HTTP for reconnections.
• The Forms Server runtime processes (f60webmx) on the middle tier. There is one process per currently connected user session. There may also be a pool of pre-spawned processes, waiting to be allocated to new users; this improves startup performance. In addition, there may be processes left from terminated sessions, particularly where the client has been killed instead of exiting cleanly. These processes should timeout and be closed down in due course.
• The client Java code consists of the Forms and Extended Windowing Toolkit (EWT) classes. EWT is Oracle’s Java toolkit, used by Forms to create and manage Java UI components such as windows, text items, tree controls and tabs. Each version of Forms requires a specific version of EWT; the EWT version will often be upgraded in Forms patchsets.
• In Applications, standard Forms functionality on the client PC has been extended by using Java Beans, which allow Applications developers to execute their own Java code on the client.
How the connection works
The URL is run from a browser session via an HTTP request. If using the dynamic HTML method, the Listener calls the Forms CGI Cartridge to generate the HTML page dynamically. This involves replacing tokens within a base HTML file with parameters passed in the URL, or defaulting to values specified in the appsweb.cfg file.
If Forms load balancing is used, the Forms CGI Cartridge requests load information from the Load Balancing Server process, and uses this to dynamically modify the serverHost HTML parameter, so the user connects to the least loaded middle tier.
Steps 3 and 4
Next, the browser reads the applet tags, mime types and other elements in the HTML page. It then launches the JInitiator plug-in, as defined by the MIME type, to replace the browser’s default JDK. JInitiator then launches the Forms Applet specified by the applet tags. First, it downloads the jar files specified in the archive tag via the WebDB or Apache listener. Once the jar files have been downloaded, the Forms Applet is started up.
The Forms Applet is started up. It reads the serverPort, serverHost, and connectMode HTML parameters, and connects to the Forms listener using the host, port and protocol specified.
A connection is established with the Forms Listener process. A new Forms runtime process is forked, or, if applicable, the next free pool process is used. The socket connection between the Forms Applet and Forms Listener is handed off to the Forms runtime process, so the Applet communicates directly with the runtime process.
- Forms run time trace
When-logon-Change error comes
1 Complie invalids
2. Compile all the pll and bounce the forms server
3 Jiniater Dowload URL
http://<web host name:port>:/jinitiator/oajinit.exe
4.User-exit ere third generation languages which you can create and call during forms
Application include various USER+EXIT
- Core libraries
6.f60webmx is the core executable used in forms run time.Sometimes forms may not be opening. Relinking may help
adrelink.sh force=y ranlib=y “FND f60webmx”
7 Form listener mode is used in 11i.Serlvet mode is also avialable,,you will need to set various files to activate that.
8.The About Oracle Applications Window
The About Oracle Applications Window displays a large amount of useful information to assist with problem diagnosis. From the menu select Help -> About Oracle Applications. In Release 11i, the information provided has been greatly enhanced.
Copyright © 1986-1999 Oracle Corporation,
Redwood Shores, California.
All Rights Reserved.
Site : XYZ
Application : System Administration
Responsibility : System Administrator
Security Group : Standard
User Name : VISION
RDBMS : 18.104.22.168
Oracle Applications : 11.5.10
Machine : aaaaa
User : APPS
Oracle SID : XYZ
System Date : 09/05/2007 06:46:58
Database process : 19812
Session SID : 2133
SERIAL# : 1462
AUDSID : 94824382
Oracle Forms Version : 6.XYZ
Application Object Library : 11.5.0
Machine : XYZ
Forms Server Environment Variables
AU_TOP : /xy/xy/xy
FDBDMCHK : OFF
FDFGCXDBG : [Unset]
FDSQLCHK : [Unset]
FDUDEBUG : [Unset]
FNDNAM : apps
FND_INTERACTION_MODE : BLOCKING
FND_TOP : xy/xy/xy
FORMS60_APPSLIBS : FNDSQF APPCORE APPDAYPK APPFLDR ARXCOVER HR_GEN HR_SPEC
FORMS60_CATCHTERM : [Unset]
FORMS60_ERROR_DATETIME_FORMAT : [Unset]
FORMS60_ERROR_DATE_FORMAT : [Unset]
FORMS60_FORCE_MENU_MNEMONICS : [Unset]
FORMS60_MAPPING : http://XYZ/OA_TMP
FORMS60_MMAP : [Unset]
FORMS60_OUTPUT : /XYZ/common/xyz11510/tmp
FORMS60_OUTPUT_DATETIME_FORMAT : [Unset]
FORMS60_OUTPUT_DATE_FORMAT : [Unset]
FORMS60_RESOURCE : /xyz/8.0.6/forms60/admin/resource/US
FORMS60_TIMEOUT : 5
FORMS60_USER_DATETIME_FORMAT : MM/DD/RRRR HH24:MI:SS
FORMS60_USER_DATE_FORMAT : MM/DD/RRRR
FORMS60_USE_CBO : [Unset]
GWYUID : applsyspub/pub
NLS_DATE_FORMAT : DD-MON-RR
NLS_DATE_LANGUAGE : [Unset]
NLS_LANG : American_America.UTF8
NLS_NUMERIC_CHARACTERS : [Unset]
ORACLE_HOME : /Xyz/8.0.6
ORACLE_PATH : [Unset]
ORA_NLS_CHARSET_CONVERSION : [Unset]
TNS_ADMIN : [Unset]
TWO_TASK : Xyz11510
Form Application : Application Object Library
Form Name : FNDSCAUS
Form Path : /Xyz/xyx/Xyz11510/forms/US/FNDSCAUS.fmx
Form Version : 11.5.XY
Form Last Modified : $Date: 2001/07/05 07:01 $
APPSTAND : 11.5.22
FNDSCAUS : 11.5.21
FNDSCSGN : 11.5.872
FNDMENU : 11.5.322
APPCORE : 11.5.567
CUSTOM : 11.5.4
FNDSQF : 11.5.23
GHR : 11.5.25
GLOBE : 11.5.43
OPM : 11.5.0
PQH_GEN : 11.5.5
PSAC : 11.5.3
VERT : 11.5.6
Other useful features are the Examine window, which allows you to check the current block, item and value. From the menu, select Help -> Examine. The Examine window can also be used to view other items, such as the current value of profiles and environment variables.
The Display Error option can provide the SQL- and ORA- errors when a query on a base table block or LOV fails.