Class: DSPy::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/dspy/context.rb

Class Method Summary collapse

Class Method Details

.clear! ⇒ Object 



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# File 'lib/dspy/context.rb', line 104

def clear!
  Thread.current[:dspy_context] = nil
  Fiber[:dspy_context] = nil
end

.current ⇒ Object 



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# File 'lib/dspy/context.rb', line 8

def current
  # Check if we're in an async context (fiber created by async gem)
  if in_async_context?
    # Use Fiber storage for async contexts to enable inheritance
    # Inherit from Thread.current if Fiber storage is not set
    Fiber[:dspy_context] ||= Thread.current[:dspy_context] || {
      trace_id: SecureRandom.uuid,
      span_stack: []
    }
    
    # Return Fiber storage in async contexts
    Fiber[:dspy_context]
  else
    # Use Thread.current for regular synchronous contexts
    Thread.current[:dspy_context] ||= {
      trace_id: SecureRandom.uuid,
      span_stack: []
    }
    
    # Also sync to Fiber storage so async contexts can inherit it
    Fiber[:dspy_context] = Thread.current[:dspy_context]
    
    Thread.current[:dspy_context]
  end
end

.with_span(operation:, **attributes) ⇒ Object 



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# File 'lib/dspy/context.rb', line 34

def with_span(operation:, **attributes)
  span_id = SecureRandom.uuid
  parent_span_id = current[:span_stack].last
  start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  
  # Prepare attributes with context information
  span_attributes = {
    trace_id: current[:trace_id],
    span_id: span_id,
    parent_span_id: parent_span_id,
    operation: operation,
    **attributes
  }
  
  # Log span start with proper hierarchy (internal logging only)
  DSPy.log('span.start', **span_attributes) if DSPy::Observability.enabled?
  
  # Push to stack for child spans tracking
  current[:span_stack].push(span_id)
  
  begin
    # Use OpenTelemetry's proper context management for nesting
    if DSPy::Observability.enabled? && DSPy::Observability.tracer
      # Prepare attributes and add trace name for root spans
      span_attributes = attributes.transform_keys(&:to_s).reject { |k, v| v.nil? }
      
      # Set trace name if this is likely a root span (no parent in our stack)
      if current[:span_stack].length == 1  # This will be the first span
        span_attributes['langfuse.trace.name'] = operation
      end
      
      # Record start time for explicit duration tracking
      otel_start_time = Time.now
      
      DSPy::Observability.tracer.in_span(
        operation,
        attributes: span_attributes,
        kind: :internal
      ) do |span|
        result = yield(span)
        
        # Add explicit timing information to help Langfuse
        if span
          duration_ms = ((Time.now - otel_start_time) * 1000).round(3)
          span.set_attribute('duration.ms', duration_ms)
          span.set_attribute('langfuse.observation.startTime', otel_start_time.iso8601(3))
          span.set_attribute('langfuse.observation.endTime', Time.now.iso8601(3))
        end
        
        result
      end
    else
      yield(nil)
    end
  ensure
    # Pop from stack
    current[:span_stack].pop
    
    # Log span end with duration (internal logging only)
    if DSPy::Observability.enabled?
      duration_ms = ((Process.clock_gettime(Process::CLOCK_MONOTONIC) - start_time) * 1000).round(2)
      DSPy.log('span.end',
        trace_id: current[:trace_id],
        span_id: span_id,
        duration_ms: duration_ms
      )
    end
  end
end