Log4perl 的使用

Perl 使用Log4perl

首先下载log4 module ：

http://search.cpan.org/CPAN/authors/id/M/MS/MSCHILLI/Log-Log4perl-1.43.tar.gz

解压配置：

这里只用到lib目录下的文件，可以将其他目录删除。

如何使用这个模块：

新增一个名为log4perl.conf的文件，放在lib目录下

配置如下：

这里使用自定义的package： log4用来设置log路径

 log4perl.category.Foo.Bar=DEBUG,Logfile,Screen
 log4perl.rootLogger=DEBUG,Logfile,Screen

  log4perl.appender.Logfile=Log::Log4perl::Appender::File
  log4perl.appender.Logfile.filename=\
                                     sub { return &log4::set_log_name(); }
     log4perl.appender.Logfile.layout=Log::Log4perl::Layout::PatternLayout
  log4perl.appender.Logfile.layout.ConversionPattern =%d{yyyy/M/d HH:mm:ss} %F %L - %m%n

  log4perl.appender.Screen = Log::Log4perl::Appender::Screen
  log4perl.appender.Screen.stderr = 0
  log4perl.appender.Screen.layout = Log::Log4perl::Layout::PatternLayout
  log4perl.appender.Screen.layout.ConversionPattern =%d{yyyy/M/d HH:mm:ss} %F %L - %m%n

使用log4perl.conf

#!/usr/bin/perl
package log4;
use strict;
use FindBin qw($Bin);
use lib "$Bin/lib";
print "$Bin\n";
use Log::Log4perl qw(get_logger);
my $log = get_logger(__PACKAGE__);
my $log_name="log4.log";
my $log_conf = "$Bin/lib/log4perl.conf";
print "$log_conf\n";

# Check config every 60 secs
Log::Log4perl::init_and_watch($log_conf,);  

$log->debug("Debug message");
$log->info("Info message");
$log->error("Error message");
$log->info(&ping);
sub ping
{

    my @ping=readpipe("ping 127.0.0.1");
    return @ping;
}
sub set_log_name
{
    return $log_name;
}

其中：

$log->trace("..."); # Log a trace message
$log->debug("..."); # Log a debug message
$log->info("..."); # Log a info message
$log->warn("..."); # Log a warn message
$log->error("..."); # Log a error message
$log->fatal("..."); # Log a fatal message

运行结果如下：

D:\perl>perl log4test.pl
D:/perl
D:/perl/lib/log4perl.conf
2014/4/22 14:40:29 log4test.pl 17 - Debug message
2014/4/22 14:40:29 log4test.pl 18 - Info message
2014/4/22 14:40:29 log4test.pl 19 - Error message
2014/4/22 14:40:33 log4test.pl 20 -
Pinging 127.0.0.1 with 32 bytes of data:
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64

Ping statistics for 127.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

生成log内容是：

2014/4/22 14:40:29 log4test.pl 17 - Debug message
2014/4/22 14:40:29 log4test.pl 18 - Info message
2014/4/22 14:40:29 log4test.pl 19 - Error message
2014/4/22 14:40:33 log4test.pl 20 -
Pinging 127.0.0.1 with 32 bytes of data:
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64

Ping statistics for 127.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

也可以直接将配置文件放入脚本

 my $conf = q(
    log4perl.category.Foo.Bar          = INFO, Logfile, Screen

    log4perl.appender.Logfile          = Log::Log4perl::Appender::File
    log4perl.appender.Logfile.filename = test.log
    log4perl.appender.Logfile.layout   = Log::Log4perl::Layout::PatternLayout
    log4perl.appender.Logfile.layout.ConversionPattern = [%r] %F %L %m%n

    log4perl.appender.Screen         = Log::Log4perl::Appender::Screen
    log4perl.appender.Screen.stderr  =
    log4perl.appender.Screen.layout = Log::Log4perl::Layout::SimpleLayout
  );

     # ... passed as a reference to init()
  Log::Log4perl::init( \$conf );