# NAME Plack::Middleware::XRay - Plack middleware for AWS X-Ray tracing # SYNOPSIS use Plack::Builder; builder { enable "XRay", name => "myApp", ; $app; }; # example of sampling rate builder { enable "XRay" name => "myApp", sampling_rate => 0.01, # 1% ; $app; }; # example of custom sampler builder { enable "XRay" name => "myApp", sampler => sub { my $env = shift; state %paths;; if ( $paths{$env->{PATH_INFO}++ == 0 ) { # always sample when the path accessed at first in a process. return 1; } rand() < 0.01; # otherwise 1% sampling }, ; $app; }; # example of response filter builder { enable "XRay" name => "myApp", response_filter => sub { my ($env, $res, $elapsed) = @_; # true if server error or slow response. return $res->[0] >= 500 || $elapsed >= 1.5; }, ; $app; }; # DESCRIPTION Plack::Middleware::XRay is a middleware for AWS X-Ray. See also [AWS::XRay](https://metacpan.org/pod/AWS::XRay). # CONFIGURATION ## name The logical name of the service that handled the request. Required. See also [AWS X-Ray Segment Documents](https://docs.aws.amazon.com/xray/latest/devguide/xray-api-segmentdocuments.html). ## annotations [annotations](https://docs.aws.amazon.com/xray/latest/devguide/xray-api-segmentdocuments.html#api-segmentdocuments-annotations) object with key-value pairs that you want X-Ray to index for search. ## metadata [metadata](https://docs.aws.amazon.com/xray/latest/devguide/xray-api-segmentdocuments.html#api-segmentdocuments-metadata) object with any additional data that you want to store in the segment. ## annotations\_builder Code ref to generate an annotations hashref. enable "XRay" name => "myApp", annotations_builder => sub { my $env = shift; return { app_id => $env->{HTTP_X_APP_ID}, }; }, ## metadata\_builder Code ref to generate a metadata hashref. ## response\_filter When response\_filter defined, call the coderef with ($env, $res, $elapsed) after $app run. Segment data are sent to xray daemon only when the coderef returns true. # LICENSE Copyright (C) FUJIWARA Shunichiro. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. # AUTHOR FUJIWARA Shunichiro