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# File 'lib/dspy/o11y/langfuse.rb', line 21
def configure(obs)
return obs.disable!(reason: 'Explicitly disabled via DSPY_DISABLE_OBSERVABILITY') if ENV['DSPY_DISABLE_OBSERVABILITY'] == 'true'
public_key = ENV['LANGFUSE_PUBLIC_KEY']
secret_key = ENV['LANGFUSE_SECRET_KEY']
if test_environment? && !(public_key && secret_key)
return obs.disable!(reason: 'Test environment detected - OTLP disabled')
end
return false unless public_key && secret_key
require_opentelemetry!
patch_frozen_ssl_context_for_otlp!
endpoint = langfuse_endpoint
auth_string = Base64.strict_encode64("#{public_key}:#{secret_key}")
OpenTelemetry::SDK.configure do |config|
config.service_name = 'dspy-ruby'
config.service_version = DSPy::VERSION
exporter = OpenTelemetry::Exporter::OTLP::Exporter.new(
endpoint: endpoint,
headers: {
'Authorization' => "Basic #{auth_string}",
'Content-Type' => 'application/x-protobuf'
},
compression: 'gzip'
)
async_config = {
queue_size: (ENV['DSPY_TELEMETRY_QUEUE_SIZE'] || DSPy::Observability::AsyncSpanProcessor::DEFAULT_QUEUE_SIZE).to_i,
export_interval: (ENV['DSPY_TELEMETRY_EXPORT_INTERVAL'] || DSPy::Observability::AsyncSpanProcessor::DEFAULT_EXPORT_INTERVAL).to_f,
export_batch_size: (ENV['DSPY_TELEMETRY_BATCH_SIZE'] || DSPy::Observability::AsyncSpanProcessor::DEFAULT_EXPORT_BATCH_SIZE).to_i,
shutdown_timeout: (ENV['DSPY_TELEMETRY_SHUTDOWN_TIMEOUT'] || DSPy::Observability::AsyncSpanProcessor::DEFAULT_SHUTDOWN_TIMEOUT).to_f
}
config.add_span_processor(
DSPy::Observability::AsyncSpanProcessor.new(exporter, **async_config)
)
config.resource = OpenTelemetry::SDK::Resources::Resource.create({
'service.name' => 'dspy-ruby',
'service.version' => DSPy::VERSION,
'telemetry.sdk.name' => 'opentelemetry',
'telemetry.sdk.language' => 'ruby'
})
end
tracer = OpenTelemetry.tracer_provider.tracer('dspy', DSPy::VERSION)
obs.enable!(tracer: tracer, endpoint: endpoint)
true
rescue LoadError
obs.disable!(reason: 'OpenTelemetry gems not available')
false
rescue StandardError => e
DSPy.log('observability.error', error: e.message, adapter: 'langfuse', class: e.class.name)
obs.disable!
false
end
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