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Original file line number | Diff line number | Diff line change |
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package Log::Any::Adapter::OpenTelemetry; | ||
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use strict; | ||
use warnings; | ||
use experimental 'signatures'; | ||
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our $VERSION = '0.024'; | ||
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use Log::Any::Adapter::Util (); | ||
use OpenTelemetry qw( otel_config otel_span_from_context otel_logger_provider ); | ||
use Ref::Util 'is_hashref'; | ||
use Time::HiRes 'time'; | ||
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use OpenTelemetry::Constants qw( | ||
LOG_LEVEL_TRACE | ||
LOG_LEVEL_DEBUG | ||
LOG_LEVEL_INFO | ||
LOG_LEVEL_WARN | ||
LOG_LEVEL_ERROR | ||
LOG_LEVEL_FATAL | ||
); | ||
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use base 'Log::Any::Adapter::Base'; | ||
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my %LOG2OTEL = ( | ||
trace => LOG_LEVEL_TRACE, | ||
debug => LOG_LEVEL_DEBUG, | ||
info => LOG_LEVEL_INFO, | ||
warn => LOG_LEVEL_WARN, | ||
error => LOG_LEVEL_ERROR, | ||
fatal => LOG_LEVEL_FATAL, | ||
); | ||
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my %OTEL2LOG = ( | ||
trace => 8, | ||
debug => 7, | ||
info => 6, | ||
warn => 4, | ||
error => 3, | ||
fatal => 2, | ||
); | ||
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sub init ( $self, @ ) { | ||
# FIXME: It would be good to get a logger early and cache | ||
# it for eventual calls. However, this suffers from the same | ||
# issue with caching tracers that is documented in the POD | ||
# for OpenTelemetry::Trace::Tracer: namely, that if we get | ||
# the no-op logger before we've set up a real logger provider | ||
# that can generate real loggers, we'll be stuck with a no-op. | ||
# It might be that we need to revisit the proxy classes removed | ||
# in d9e321bd1bf65d510b12ef34fe2b5a0c51da0bf2, although the | ||
# rationale for why they were removed is still sound. We'd just | ||
# have to come up with a way to make sure its delegate continues | ||
# to point to the right place even if the tracer provider changes | ||
# $self->{logger} = otel_logger_provider->logger; | ||
} | ||
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for my $method ( Log::Any::Adapter::Util::logging_methods() ) { | ||
no strict 'refs'; | ||
*$method = sub ( $self, @args) { | ||
$self->structured( $method, $self->category, @args ); | ||
}; | ||
} | ||
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for my $method ( Log::Any::Adapter::Util::detection_methods() ) { | ||
my $numeric = Log::Any::Adapter::Util::numeric_level( $method =~ s/^is_//r ); | ||
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no strict 'refs'; | ||
*$method = sub { | ||
$numeric <= $OTEL2LOG{ lc( otel_config('LOG_LEVEL') // 'info' ) }; | ||
}; | ||
} | ||
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sub structured ( $self, $method, $category, @parts ) { | ||
my $level = $method; | ||
for ($level) { | ||
s/(?:emergency|alert|critical)/fatal/; | ||
s/notice/info/; | ||
s/warning/warn/; | ||
} | ||
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# FIXME: This is a little finicky. The aim is for the first | ||
# argument to be the body (even if it is structured), and | ||
# anything else gets put into the attributes. If the log | ||
# comes with structured data that is not a hash, we put it | ||
# under a `payload` key. Maybe this can be simplified to | ||
# always put the data under a given key, but then we add | ||
# data to the arguably common operation of attaching a hash. | ||
my %args = ( body => shift @parts ); | ||
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$args{attributes} = @parts == 1 | ||
? is_hashref $parts[0] | ||
? $parts[0] : { payload => $parts[0] } | ||
: @parts % 2 | ||
? { payload => \@parts } : { @parts } | ||
if @parts; | ||
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otel_logger_provider->logger->emit_record( | ||
timestamp => time, | ||
severity_text => $method, | ||
severity_number => 0+$LOG2OTEL{$level}, | ||
%args, | ||
); | ||
} | ||
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1; |
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