clojure.contrib.loggingの使い方

gistfile1.txt

user=> (use 'clojure.contrib.logging)         
nil
user=> (info "foo-info")                      
2010/03/25 23:21:23 clojure.contrib.logging$eval__92$impl_write_BANG___100 invoke
情報: foo-info
nil
user=> (fatal "foo-fatal")
2010/03/25 23:21:32 clojure.contrib.logging$eval__92$impl_write_BANG___100 invoke
致命的: foo-fatal
nil
user=> (use 'clojure.contrib.duck-streams)    
nil
user=> (with-out-append-writer "/tmp/test.log"
         (info "bar-info")
         (fatal "bar-fatal"))
2010/03/25 23:22:06 clojure.contrib.logging$eval__92$impl_write_BANG___100 invoke
情報: bar-info
2010/03/25 23:22:06 clojure.contrib.logging$eval__92$impl_write_BANG___100 invoke
致命的: bar-fatal
nil