Singleton class to track token usage across a workflow.
| 34 | |
| 35 | |
| 36 | class TokenTracker: |
| 37 | """Singleton class to track token usage across a workflow.""" |
| 38 | |
| 39 | def __init__(self, workflow_id: str): |
| 40 | self.workflow_id = workflow_id |
| 41 | self.total_usage = TokenUsage() |
| 42 | self.node_usages = defaultdict(TokenUsage) |
| 43 | self.model_usages = defaultdict(TokenUsage) |
| 44 | self.call_history = [] |
| 45 | self.node_call_counts = defaultdict(int) # Track how many times each node is called |
| 46 | |
| 47 | def record_usage(self, node_id: str, model_name: str, usage: TokenUsage, provider: str = None): |
| 48 | """Records token usage for a specific call, handling multiple node executions.""" |
| 49 | # Update the usage with provider if it wasn't set already |
| 50 | if provider and not usage.provider: |
| 51 | usage.provider = provider |
| 52 | |
| 53 | # Add to total usage |
| 54 | self.total_usage.input_tokens += usage.input_tokens |
| 55 | self.total_usage.output_tokens += usage.output_tokens |
| 56 | self.total_usage.total_tokens += usage.total_tokens |
| 57 | |
| 58 | # Add to node-specific usage |
| 59 | node_usage = self.node_usages[node_id] |
| 60 | node_usage.input_tokens += usage.input_tokens |
| 61 | node_usage.output_tokens += usage.output_tokens |
| 62 | node_usage.total_tokens += usage.total_tokens |
| 63 | if provider: |
| 64 | node_usage.provider = provider # Store provider info |
| 65 | |
| 66 | # Add to model-specific usage |
| 67 | model_usage = self.model_usages[model_name] |
| 68 | model_usage.input_tokens += usage.input_tokens |
| 69 | model_usage.output_tokens += usage.output_tokens |
| 70 | model_usage.total_tokens += usage.total_tokens |
| 71 | if provider: |
| 72 | model_usage.provider = provider # Store provider info |
| 73 | |
| 74 | # Increment call count for this node |
| 75 | self.node_call_counts[node_id] += 1 |
| 76 | |
| 77 | # Add to call history |
| 78 | history_entry = { |
| 79 | "node_id": node_id, |
| 80 | "model_name": model_name, |
| 81 | "input_tokens": usage.input_tokens, |
| 82 | "output_tokens": usage.output_tokens, |
| 83 | "total_tokens": usage.total_tokens, |
| 84 | "metadata": dict(usage.metadata), |
| 85 | "timestamp": usage.timestamp.isoformat(), |
| 86 | "execution_number": self.node_call_counts[node_id] # Track which execution this is |
| 87 | } |
| 88 | |
| 89 | # Add provider to history entry if available |
| 90 | if provider: |
| 91 | history_entry["provider"] = provider |
| 92 | |
| 93 | self.call_history.append(history_entry) |