Log::Minimal 小型可定制的log模块

语法:

  use Log::Minimal;

  critf("%s","foo"); # 2010-10-20T00:25:17 [CRITICAL] foo at example.pl line 12
  warnf("%d %s %s", 1, "foo", $uri);
  infof('foo');
  debugf("foo"); print if $ENV{LM_DEBUG} is true

  # with full stack trace
  critff("%s","foo");
  # 2010-10-20T00:25:17 [CRITICAL] foo at lib/Example.pm line 10, example.pl line 12
  warnff("%d %s %s", 1, "foo", $uri);
  infoff('foo');
  debugff("foo"); print if $ENV{LM_DEBUG} is true

  my $serialize = ddf({ 'key' => 'value' });

  # die with formatted message
  croakf('foo');
  croakff('%s %s', $code, $message);

序列化复杂数据结构输出日志

  warnf("%s",{ foo => bar}); # HASH(0x100804ed0)

  local $Log::Minimal::AUTODUMP = 1;
  warnf("dump is %s", {foo=>'bar'}); #dump is {foo=>'bar'}

  my $uri = URI->new("http://search.cpan.org/");
  warnf("uri: '%s'", $uri); # uri: 'http://search.cpan.org/'

修改日志的输出级别，默认为INFO级别

$ENV{LM_DEBUG}=1; 修改环境变量

local $Log::Minimal::LOG_LEVEL = "INFO"; #代码控制

定制log文件

#定制输出的格式
local $Log::Minimal::PRINT = sub {
    my ( $time, $type, $message, $trace) = @_; 
    print("$time $type $message $trace\n");
};

指定文件进行log日志的输出

local $Log::Minimal::PRINT = sub {
    my ( $time, $type, $message, $trace) = @_;
    print {$fh} "$time [$type] $message at $trace\n";  # $fh 是指定的文件句柄
};