Oracle AutoConfig in Oracle Applications
AutoConfig is the tool, which is used to configure oracle application systems. AutoConfig uses a file called context file, which is used to configure changes. Context file is a XML file having all the parameters of application system.These parameters are part of some configuration file for some services or it may be a part of some environment file. Each configuration file has one corresponding template file (provided by autoconfig patches, stored in $PROD_TOP/admin/template directory).Profile options and other instance specific information in the database is maintained by many sql scripts, called from wrapper shell/perl scripts. These scripts also have corresponding template files (also provided by autoconfig patches, `in $PROD_TOP/admin/templates). In these template files all the environment specific values are replaced by placeholders (like %s_webhost%). Environment specific values for this placeholder is stored in an environment specific xml file (called application context file) stored in $APPL_TOP/admin.
Eg,
Following entry in httpd.conf
Timeout 300 is replaced by following in its template $FND_TOP/admin/template/httpd_ux_ias1022.conf
Timeout %s_ohstimeout%
For the above placeholder the value stored in the xml file is:
<ohstimeout oa_var=”s_ohstimeout”>300</ohstimeout>
Each placeholder has a corresponding xml node in the context file. The placeholder name is the value for the “oa_var” attribute of the xml node, the placeholder name without the prefix “s_” (generally) is the node name for the xml node and the value is stored as a child text node. These xml nodes are termed as context variables by Oracle documentation and each node primarily is identified by its oa_var attribute value. So effectively we can say that in the above case we replace “300″ by context variable “ohstimeout” whose oa_var value is “s_ohstimeout”. Configuration files can be easily created from the template file by just replacing all the placeholders with the corresponding values from the context file. This process is termed as “instantiating the template” in Oracle documentation.
Driver files (stored in $PROD_TOP/admin/driver) store information about what to do with each template (e.g. instantiate it and replace the existing configuration file with it, instantiate it and run it). These files are named as <PROD_TOP>tmpl.drv (e.g. adtmpl.drv, fndtmpl.drv etc.) They contain one line for each template they manage.
When autoconfig (adconfig.pl or adconfig.sh) runs it just processes the driver file for each product, line by line doing what the driver file instructs it to do. The order of execution of each line is not sequential.
AutoConfig is the tool, which is used to configure oracle application systems. AutoConfig uses a file called context file, which is used to configure changes. Context file is a XML file having all the parameters of application system.These parameters are part of some configuration file for some services or it may be a part of some environment file. Each configuration file has one corresponding template file (provided by autoconfig patches, stored in $PROD_TOP/admin/template directory).Profile options and other instance specific information in the database is maintained by many sql scripts, called from wrapper shell/perl scripts. These scripts also have corresponding template files (also provided by autoconfig patches, `in $PROD_TOP/admin/templates). In these template files all the environment specific values are replaced by placeholders (like %s_webhost%). Environment specific values for this placeholder is stored in an environment specific xml file (called application context file) stored in $APPL_TOP/admin.
Eg,
Following entry in httpd.conf
Timeout 300 is replaced by following in its template $FND_TOP/admin/template/httpd_ux_ias1022.conf
Timeout %s_ohstimeout%
For the above placeholder the value stored in the xml file is:
<ohstimeout oa_var=”s_ohstimeout”>300</ohstimeout>
Each placeholder has a corresponding xml node in the context file. The placeholder name is the value for the “oa_var” attribute of the xml node, the placeholder name without the prefix “s_” (generally) is the node name for the xml node and the value is stored as a child text node. These xml nodes are termed as context variables by Oracle documentation and each node primarily is identified by its oa_var attribute value. So effectively we can say that in the above case we replace “300″ by context variable “ohstimeout” whose oa_var value is “s_ohstimeout”. Configuration files can be easily created from the template file by just replacing all the placeholders with the corresponding values from the context file. This process is termed as “instantiating the template” in Oracle documentation.
Driver files (stored in $PROD_TOP/admin/driver) store information about what to do with each template (e.g. instantiate it and replace the existing configuration file with it, instantiate it and run it). These files are named as <PROD_TOP>tmpl.drv (e.g. adtmpl.drv, fndtmpl.drv etc.) They contain one line for each template they manage.
When autoconfig (adconfig.pl or adconfig.sh) runs it just processes the driver file for each product, line by line doing what the driver file instructs it to do. The order of execution of each line is not sequential.
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