Class: Tracekit::LLM::AnthropicInstrumentation::AnthropicStreamAccumulator

Inherits:
Object
  • Object
show all
Defined in:
lib/tracekit/llm/anthropic_instrumentation.rb

Overview

Accumulates streaming event data for span attributes

Instance Method Summary collapse

Constructor Details

#initialize(span, capture_content) ⇒ AnthropicStreamAccumulator

Returns a new instance of AnthropicStreamAccumulator.



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# File 'lib/tracekit/llm/anthropic_instrumentation.rb', line 127

def initialize(span, capture_content)
  @span = span
  @capture = capture_content
  @model = nil
  @id = nil
  @stop_reason = nil
  @input_tokens = nil
  @output_tokens = nil
  @cache_creation_tokens = nil
  @cache_read_tokens = nil
  @output_chunks = []
  @tool_calls = {}
  @current_block_index = 0
end

Instance Method Details

#finalize ⇒ Object 



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# File 'lib/tracekit/llm/anthropic_instrumentation.rb', line 190

def finalize
  Common.set_response_attributes(@span,
    model: @model,
    id: @id,
    finish_reasons: @stop_reason ? [@stop_reason] : nil,
    input_tokens: @input_tokens,
    output_tokens: @output_tokens
  )

  @span.set_attribute("gen_ai.usage.cache_creation.input_tokens", @cache_creation_tokens) if @cache_creation_tokens
  @span.set_attribute("gen_ai.usage.cache_read.input_tokens", @cache_read_tokens) if @cache_read_tokens

  @tool_calls.each_value do |tc|
    Common.record_tool_call(@span, **tc)
  end

  if @capture && @output_chunks.any?
    full_content = @output_chunks.join
    Common.capture_output_messages(@span, [{ "type" => "text", "text" => full_content }])
  end
rescue => _e
  # Never break user code
ensure
  @span.finish
end

#process_event(event) ⇒ Object 



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# File 'lib/tracekit/llm/anthropic_instrumentation.rb', line 142

def process_event(event)
  event_type = event["type"] || event[:type]

  case event_type
  when "message_start"
    message = event["message"] || event[:message] || {}
    @model = message["model"] || message[:model]
    @id = message["id"] || message[:id]
    usage = message["usage"] || message[:usage] || {}
    @input_tokens = usage["input_tokens"] || usage[:input_tokens]
    @cache_creation_tokens = usage["cache_creation_input_tokens"] || usage[:cache_creation_input_tokens]
    @cache_read_tokens = usage["cache_read_input_tokens"] || usage[:cache_read_input_tokens]

  when "content_block_start"
    @current_block_index = event["index"] || event[:index] || @current_block_index
    cb = event["content_block"] || event[:content_block] || {}
    if (cb["type"] || cb[:type]) == "tool_use"
      @tool_calls[@current_block_index] = {
        name: cb["name"] || cb[:name] || "unknown",
        id: cb["id"] || cb[:id],
        arguments: ""
      }
    end

  when "content_block_delta"
    delta = event["delta"] || event[:delta] || {}
    delta_type = delta["type"] || delta[:type]
    if delta_type == "text_delta" && @capture
      text = delta["text"] || delta[:text]
      @output_chunks << text if text
    elsif delta_type == "input_json_delta"
      partial = delta["partial_json"] || delta[:partial_json]
      idx = event["index"] || event[:index] || @current_block_index
      if partial && @tool_calls[idx]
        @tool_calls[idx][:arguments] += partial
      end
    end

  when "message_delta"
    delta = event["delta"] || event[:delta] || {}
    @stop_reason = delta["stop_reason"] || delta[:stop_reason] if delta["stop_reason"] || delta[:stop_reason]
    usage = event["usage"] || event[:usage] || {}
    @output_tokens = usage["output_tokens"] || usage[:output_tokens] if usage["output_tokens"] || usage[:output_tokens]
  end
rescue => _e
  # Never fail on event processing
end