Log::Any::Adapter(3pm)User Contributed Perl DocumentatioLog::Any::Adapter(3pm)
NAME
Log::Any::Adapter - Tell Log::Any where to send its logs
VERSION
version 1.713
SYNOPSIS
# Log to a file, or stdout, or stderr for all categories
#
use Log::Any::Adapter ('File', '/path/to/file.log');
use Log::Any::Adapter ('Stdout');
use Log::Any::Adapter ('Stderr');
# Use Log::Log4perl for all categories
#
Log::Log4perl::init('/etc/log4perl.conf');
Log::Any::Adapter->set('Log4perl');
# Use Log::Dispatch for Foo::Baz
#
use Log::Dispatch;
my $log = Log::Dispatch->new(outputs => [[ ... ]]);
Log::Any::Adapter->set( { category => 'Foo::Baz' },
'Dispatch', dispatcher => $log );
# Use Log::Dispatch::Config for Foo::Baz and its subcategories
#
use Log::Dispatch::Config;
Log::Dispatch::Config->configure('/path/to/log.conf');
Log::Any::Adapter->set(
{ category => qr/^Foo::Baz/ },
'Dispatch', dispatcher => Log::Dispatch::Config->instance() );
# Use your own adapter for all categories
#
Log::Any::Adapter->set('+My::Log::Any::Adapter', ...);
DESCRIPTION
Log::Any::Adapter connects log producers and log consumers. Its
methods instantiate a logging adapter (a subclass of
Log::Any::Adapter::Base) and route log messages from one or more
categories to it.
ADAPTERS
In order to use a logging mechanism with "Log::Any", there needs to be
an adapter class for it. Typically this is named
Log::Any::Adapter::something.
Adapters in this distribution
Three basic adapters come with this distribution --
Log::Any::Adapter::File, Log::Any::Adapter::Stdout and
Log::Any::Adapter::Stderr:
use Log::Any::Adapter ('File', '/path/to/file.log');
use Log::Any::Adapter ('Stdout');
use Log::Any::Adapter ('Stderr');
# or
use Log::Any::Adapter;
Log::Any::Adapter->set('File', '/path/to/file.log');
Log::Any::Adapter->set('Stdout');
Log::Any::Adapter->set('Stderr');
All of them simply output the message and newline to the specified
destination; a datestamp prefix is added in the "File" case. For
anything more complex you'll want to use a more robust adapter from
CPAN.
Adapters on CPAN
A sampling of adapters available on CPAN as of this writing:
• Log::Any::Adapter::Log4perl
• Log::Any::Adapter::Dispatch
• Log::Any::Adapter::FileHandle
• Log::Any::Adapter::Syslog
You may find other adapters on CPAN by searching for
"Log::Any::Adapter", or create your own adapter. See
Log::Any::Adapter::Development for more information on the latter.
SETTING AND REMOVING ADAPTERS
Log::Any::Adapter->set ([options, ]adapter_name, adapter_params...)
This method sets the adapter to use for all log categories, or for
a particular set of categories.
adapter_name is the name of an adapter. It is automatically
prepended with "Log::Any::Adapter::". If instead you want to pass
the full name of an adapter, prefix it with a "+". e.g.
# Use My::Adapter class
Log::Any::Adapter->set('+My::Adapter', arg => $value);
adapter_params are passed along to the adapter constructor. See the
documentation for the individual adapter classes for more
information.
An optional hash of options may be passed as the first argument.
Options are:
category
A string containing a category name, or a regex (created with
"qr//") matching multiple categories. If not specified, all
categories will be routed to the adapter.
lexically
A reference to a lexical variable. When the variable goes out
of scope, the adapter setting will be removed. e.g.
{
Log::Any::Adapter->set({lexically => \my $lex}, ...);
# in effect here
...
}
# no longer in effect here
"set" returns an entry object, which can be passed to "remove". If
you call "set" repeatedly without calling "remove" you will leak
memory. For most programs that set an adapter once until the end
of the program, this shouldn't matter.
use Log::Any::Adapter (...)
If you pass arguments to "use Log::Any::Adapter", it calls
"Log::Any::Adapter->set" with those arguments.
Log::Any::Adapter->remove (entry)
Remove an entry previously returned by "set".
USING MORE THAN ONE ADAPTER
"Log::Any" maintains a stack of entries created via "set". If you call
"set" repeatedly, you will leak memory unless you do one of the
following:
When getting a logger for a particular category, "Log::Any" will work
its way down the stack and use the first matching entry.
Whenever the stack changes, any "Log::Any" loggers that have previously
been created will automatically adjust to the new stack. For example:
my $log = Log::Any->get_logger();
$log->error("aiggh!"); # this goes nowhere
...
{
Log::Any::Adapter->set({ lexically => \my $lex }, 'Log4perl');
$log->error("aiggh!"); # this goes to log4perl
...
}
$log->error("aiggh!"); # this goes nowhere again
BUILDING ON THE Log::Any BACKEND
get
my $adapter= Log::Any::Adapter->get($category);
The primary intended way to extend the producing-side of Log::Any
is with a custom Log::Any::Proxy class. However, for special
logging scenarios you might also just want access to the adapter
for a given category. The API of an adapter object is described in
Log::Any::Adapter::Development. Beware that adapter objects can be
"rewritten" on the fly, so any conditional behavior you write
depending on the capabilities of an adapter must be re-checked
every time you access the adapter.
SEE ALSO
Log::Any
AUTHORS
• Jonathan Swartz <swartz@pobox.com>
• David Golden <dagolden@cpan.org>
• Doug Bell <preaction@cpan.org>
• Daniel Pittman <daniel@rimspace.net>
• Stephen Thirlwall <sdt@cpan.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2017 by Jonathan Swartz, David Golden,
and Doug Bell.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
perl v5.36.0 2023-01-07 Log::Any::Adapter(3pm)
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