Log Levels
10 Points
strings
Instructions
In this exercise you will write some code to help Larry the Lisp Alien parse and format log strings. These log strings come in from various systems and need to be processed so that their messages can be display on an informative monitoring display.
Log strings are in the form "[<level>]: <message>". Level will be one of the following values: info, warn, or ohno.
1. Extract the message
Define a function log-message which will take a log string and evaluate to the message it contains.
(log-message "[ohno]: whoops!") ; => "whoops!"2. Determine the severity
The level of the log string determines its severity.
- a level of
infomeans a severity of:everything-ok - a level of
warnmeans a severity of:getting-worried - a level of
ohnomeans a severity of:run-for-cover
Define a function log-severity which will take a log string and evaluate to the correct severity.
(log-severity "[warn]: might want to get that checked") ; => :getting-worried3. Dealing with the vagaries of reality
Unfortunately sometimes the log strings are not always formatted correctly. Specifically the log level may be not all lower case as specified above. Modify log-severity to handle this.
(log-severity "[WaRn]: string case system failing") ; => :getting-worried4. Reformatting the log message according to log severity
Depending upon the severity the message should be modified in different ways:
- a severity of
:everything-okshould have its message changed to all lower-case. - a severity of
:getting-worriedshould have its message changed to have each word capitalized. - a severity of
:run-for-covershould have its message changed to be all upper-case.
Define a function log-format that takes a log message and evaluates to a properly formatted message.
(log-format "[ohno]: whoops!") ; => WHOOPS!Log Levels
10 Points
strings
Instructions
In this exercise you will write some code to help Larry the Lisp Alien parse and format log strings. These log strings come in from various systems and need to be processed so that their messages can be display on an informative monitoring display.
Log strings are in the form "[<level>]: <message>". Level will be one of the following values: info, warn, or ohno.
1. Extract the message
Define a function log-message which will take a log string and evaluate to the message it contains.
(log-message "[ohno]: whoops!") ; => "whoops!"2. Determine the severity
The level of the log string determines its severity.
- a level of
infomeans a severity of:everything-ok - a level of
warnmeans a severity of:getting-worried - a level of
ohnomeans a severity of:run-for-cover
Define a function log-severity which will take a log string and evaluate to the correct severity.
(log-severity "[warn]: might want to get that checked") ; => :getting-worried3. Dealing with the vagaries of reality
Unfortunately sometimes the log strings are not always formatted correctly. Specifically the log level may be not all lower case as specified above. Modify log-severity to handle this.
(log-severity "[WaRn]: string case system failing") ; => :getting-worried4. Reformatting the log message according to log severity
Depending upon the severity the message should be modified in different ways:
- a severity of
:everything-okshould have its message changed to all lower-case. - a severity of
:getting-worriedshould have its message changed to have each word capitalized. - a severity of
:run-for-covershould have its message changed to be all upper-case.
Define a function log-format that takes a log message and evaluates to a properly formatted message.
(log-format "[ohno]: whoops!") ; => WHOOPS!