The log file adapter will attempt to match this system log message to the most specific format specification. In this case, the event matches the Root_Login_Success_From format specification. The event created by the log file adapter will therefore have an event class of Root_Login_Success_From. The following mappings then take place:

Mapping Assignments

Source of Mapping

 

 

$1="Dec 10 09:45:06"

From the %t component specification

 

 

$2="sawmill"

From the first %s component specification

 

 

$3="ttyp6"

From the second %s component specification

 

 

$4="oak"

From the third %s component specification

 

 

date="Dec 10 09:45:06"

From $1

 

 

hostname="sawmill"

From $2

 

 

origin= 9.37.43.12"

From the default value of the origin

 

attribute, as derived by the log file adapter

 

 

sub_source="login"

From the constant string

 

 

on_tty="ttyp6"

From $3

 

 

from_host="oak"

From $4

 

 

-extra=", with extra stuff!"

From the constant string

 

 

msg="root login from oak, with extra

From the PRINTF statement

stuff!"

 

 

 

The following list describes how values were assigned:

vThe date and hostname attributes were inherited from the Logfile_Base class (through the Logfile_Login, Root_Login, and Root_Login_Success classes).

vThe origin attribute was also inherited from the Logfile_Base class, and was assigned the adapter default.

vThe msg attribute was not inherited from the Logfile_Base class, because it was overridden by the Root_Login_Success_From class.

vThe sub_source attribute was inherited from the constant string defined in the Logfile_Login class.

vThe on_tty attribute was inherited from the Root_Login_Success class.

vThe from_host attribute was explicitly defined on the Root_Login_Success_From class.

vThe extra attribute was defined as a temporary attribute. It is not forwarded to the event server as a part of this event.

There are a couple of other interesting items to note from this example:

vIn the PRINTF value specification for the msg attribute in the

Root_Login_Success_From class, two %s conversions are specified without any intervening white space. This allows the final msg attribute value to be created without any space between the string oak and the comma.

vIn the Root_Login format specification, there are no explicit mappings; all mappings are inherited. This allows class name specialization without changing any attribute values. Any event that matches the Logfile_Login class has the same attributes and values as those that match the Root_Login class, but the class name is different.

vVariables are resolved from the matching format specification, even if they are inherited. For example, if the msg attribute had not been overridden with the

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IBM Enterprise Console manual Mapping Assignments Source of Mapping
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Enterprise Console specifications

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