This is an appender for log4j version 1.2.x that accumulates all log messages with log level ERROR and sends them in batches once a minute.
To use it just replace the standard org.apache.log4j.net.SMTPAppender by this one. For example, using the .properties config file:
log4j.appender.mail=log4j.appender.AccumulatingSmtpAppender
log4j.appender.mail.SMTPHost=smtp.example.com
[email protected]
[email protected]
log4j.appender.mail.Subject=An error has happened
log4j.appender.mail.Threshold=ERROR
log4j.appender.mail.layout=org.apache.log4j.PatternLayout
log4j.appender.mail.layout.ConversionPattern=%d %p [%c] - <%m>%n
It is not (yet) configurable, so if you need different behaviour, you'll have to re-compile the source :)