Creating Custom Loggers

This section discusses how to create a custom logger using Smalltalk code.

The logger named 'root' always exists and is the default logger. You can create your own logger if necessary.

For example,

"Create a custom logger named Vast.

Create a transcriptAppender and add it to the Vast logger.

Write a warning message to the Vast logger."

 

| transcriptAppender loggerName |

 

loggerName := 'Vast'. “someCaseSensitiveLoggerName”

EsLogManager createLogger: loggerName.

transcriptAppender := EsTranscriptAppender

level: EsLevel Warn

layout: (EsPatternLayout new: '%d %m').

(EsLogManager loggerNamed: loggerName )

addAppender: transcriptAppender.

(EsLogManager loggerNamed: loggerName) warn: 'Hi, Mom'.

The above example will result in a line in the transcript for the 'warning' message. The transcript will look something like this. The first part of the line is the date and time including the milliseconds; the second part is the warning message itself.

2017-06-07 11:57:57,028 Hi Mom