我是Log4perl的新手,我想弄清楚为什么我在下面的设置中得到两个不同的记录器.我的理解是,这应该是一个单例,并且调用get_logger()每次都会返回相同的对象实例.
Test.pm
#!/usr/bin/perl
package Example::Test;
use strict;
use warnings;
use Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(test);
sub test
{
my $logger = Log::Log4perl->get_logger();
print $logger,"\n";
}
test.pl
#!/usr/bin/perl
use strict;
use warnings;
use Log::Log4perl;
use Example::Test;
# Logger configuration
Log::Log4perl->init('/etc/log4perl.conf');
my $logger = Log::Log4perl->get_logger();
print $logger,"\n";
my $engine = test();
产量
Log::Log4perl::Logger=HASH(0x12093d0) Log::Log4perl::Logger=HASH(0x29b4950)
解决方法
您没有指定日志记录类别,因此您的代码相当于
Log::Log4perl->get_logger(__PACKAGE__);
其中__PACKAGE__是示例::在模块内部进行测试,在主要内部进行测试.
从@L_502_0@：
Categories are also called “Loggers” in Log4perl,both refer to the same thing and these terms are used interchangeably.
Log::Log4perluses categories to determine if a log statement in a component should be executed or suppressed at the current logging level. Most of the time,these categories are just the classes the log statements are located in…
通常,您可能需要为每个模块使用单独的记录器,以便您可以以不同方式处理来自代码库不同部分的日志消息.
另一方面,如果Example :: Test应该是Log :: Log4perl的包装器,register it：
package My::Wrapper;
use strict;
use warnings 'all';
use 5.010;
use Log::Log4perl;
Log::Log4perl->wrapper_register(__PACKAGE__);
sub foo {
my $logger = Log::Log4perl->get_logger;
say $logger;
$logger->warn('foo');
}
1;
当您从包main调用My :: Wrapper :: foo()时,日志记录类别将是main ::.