""" 图谱构建服务 接口2：使用Zep API构建Standalone Graph """ import os import uuid import time import threading from typing import Dict, Any, List, Optional, Callable from dataclasses import dataclass from zep_cloud.client import Zep from zep_cloud import EpisodeData, EntityEdgeSourceTarget from ..config import Config from ..models.task import TaskManager, TaskStatus from ..utils.zep_paging import fetch_all_nodes, fetch_all_edges from .text_processor import TextProcessor @dataclass class GraphInfo: """图谱信息""" graph_id: str node_count: int edge_count: int entity_types: List[str] def to_dict(self) -> Dict[str, Any]: return { "graph_id": self.graph_id, "node_count": self.node_count, "edge_count": self.edge_count, "entity_types": self.entity_types, } class GraphBuilderService: """ 图谱构建服务 负责调用Zep API构建知识图谱 """ def __init__(self, api_key: Optional[str] = None): self.api_key = api_key or Config.ZEP_API_KEY if not self.api_key: raise ValueError("ZEP_API_KEY 未配置") self.client = Zep(api_key=self.api_key) self.task_manager = TaskManager() def build_graph_async( self, text: str, ontology: Dict[str, Any], graph_name: str = "MiroFish Graph", chunk_size: int = 500, chunk_overlap: int = 50, batch_size: int = 3 ) -> str: """ 异步构建图谱 Args: text: 输入文本 ontology: 本体定义（来自接口1的输出） graph_name: 图谱名称 chunk_size: 文本块大小 chunk_overlap: 块重叠大小 batch_size: 每批发送的块数量 Returns: 任务ID """ # 创建任务 task_id = self.task_manager.create_task( task_type="graph_build", metadata={ "graph_name": graph_name, "chunk_size": chunk_size, "text_length": len(text), } ) # 在后台线程中执行构建 thread = threading.Thread( target=self._build_graph_worker, args=(task_id, text, ontology, graph_name, chunk_size, chunk_overlap, batch_size) ) thread.daemon = True thread.start() return task_id def _build_graph_worker( self, task_id: str, text: str, ontology: Dict[str, Any], graph_name: str, chunk_size: int, chunk_overlap: int, batch_size: int ): """图谱构建工作线程""" try: self.task_manager.update_task( task_id, status=TaskStatus.PROCESSING, progress=5, message="开始构建图谱..." ) # 1. 创建图谱 graph_id = self.create_graph(graph_name) self.task_manager.update_task( task_id, progress=10, message=f"图谱已创建: {graph_id}" ) # 2. 设置本体 self.set_ontology(graph_id, ontology) self.task_manager.update_task( task_id, progress=15, message="本体已设置" ) # 3. 文本分块 chunks = TextProcessor.split_text(text, chunk_size, chunk_overlap) total_chunks = len(chunks) self.task_manager.update_task( task_id, progress=20, message=f"文本已分割为 {total_chunks} 个块" ) # 4. 分批发送数据 episode_uuids = self.add_text_batches( graph_id, chunks, batch_size, lambda msg, prog: self.task_manager.update_task( task_id, progress=20 + int(prog * 0.4), # 20-60% message=msg ) ) # 5. 等待Zep处理完成 self.task_manager.update_task( task_id, progress=60, message="等待Zep处理数据..." ) self._wait_for_episodes( episode_uuids, lambda msg, prog: self.task_manager.update_task( task_id, progress=60 + int(prog * 0.3), # 60-90% message=msg ) ) # 6. 获取图谱信息 self.task_manager.update_task( task_id, progress=90, message="获取图谱信息..." ) graph_info = self._get_graph_info(graph_id) # 完成 self.task_manager.complete_task(task_id, { "graph_id": graph_id, "graph_info": graph_info.to_dict(), "chunks_processed": total_chunks, }) except Exception as e: import traceback error_msg = f"{str(e)}\n{traceback.format_exc()}" self.task_manager.fail_task(task_id, error_msg) def create_graph(self, name: str) -> str: """创建Zep图谱（公开方法）""" graph_id = f"mirofish_{uuid.uuid4().hex[:16]}" self.client.graph.create( graph_id=graph_id, name=name, description="MiroFish Social Simulation Graph" ) return graph_id def set_ontology(self, graph_id: str, ontology: Dict[str, Any]): """设置图谱本体（公开方法）""" import warnings from typing import Optional from pydantic import Field from zep_cloud.external_clients.ontology import EntityModel, EntityText, EdgeModel # 抑制 Pydantic v2 关于 Field(default=None) 的警告 # 这是 Zep SDK 要求的用法，警告来自动态类创建，可以安全忽略 warnings.filterwarnings('ignore', category=UserWarning, module='pydantic') # Zep 保留名称，不能作为属性名 RESERVED_NAMES = {'uuid', 'name', 'group_id', 'name_embedding', 'summary', 'created_at'} MAX_EDGE_SOURCE_TARGETS = 10 def safe_attr_name(attr_name: str) -> str: """将保留名称转换为安全名称""" if attr_name.lower() in RESERVED_NAMES: return f"entity_{attr_name}" return attr_name # 动态创建实体类型 entity_types = {} for entity_def in ontology.get("entity_types", []): name = entity_def["name"] description = entity_def.get("description", f"A {name} entity.") # 创建属性字典和类型注解（Pydantic v2 需要） attrs = {"__doc__": description} annotations = {} for attr_def in entity_def.get("attributes", []): attr_name = safe_attr_name(attr_def["name"]) # 使用安全名称 attr_desc = attr_def.get("description", attr_name) # Zep API 需要 Field 的 description，这是必需的 attrs[attr_name] = Field(description=attr_desc, default=None) annotations[attr_name] = Optional[EntityText] # 类型注解 attrs["__annotations__"] = annotations # 动态创建类 entity_class = type(name, (EntityModel,), attrs) entity_class.__doc__ = description entity_types[name] = entity_class # 动态创建边类型 edge_definitions = {} for edge_def in ontology.get("edge_types", []): name = edge_def["name"] description = edge_def.get("description", f"A {name} relationship.") # 创建属性字典和类型注解 attrs = {"__doc__": description} annotations = {} for attr_def in edge_def.get("attributes", []): attr_name = safe_attr_name(attr_def["name"]) # 使用安全名称 attr_desc = attr_def.get("description", attr_name) # Zep API 需要 Field 的 description，这是必需的 attrs[attr_name] = Field(description=attr_desc, default=None) annotations[attr_name] = Optional[str] # 边属性用str类型 attrs["__annotations__"] = annotations # 动态创建类 class_name = ''.join(word.capitalize() for word in name.split('_')) edge_class = type(class_name, (EdgeModel,), attrs) edge_class.__doc__ = description # 构建source_targets source_targets = [] seen_source_targets = set() for st in edge_def.get("source_targets", []): source = st.get("source", "Entity") target = st.get("target", "Entity") source_target_key = (source, target) if source_target_key in seen_source_targets: continue source_targets.append( EntityEdgeSourceTarget( source=source, target=target ) ) seen_source_targets.add(source_target_key) # Zep API 限制每个边类型最多 10 个 source_targets if len(source_targets) >= MAX_EDGE_SOURCE_TARGETS: break if source_targets: edge_definitions[name] = (edge_class, source_targets) # 调用Zep API设置本体 if entity_types or edge_definitions: self.client.graph.set_ontology( graph_ids=[graph_id], entities=entity_types if entity_types else None, edges=edge_definitions if edge_definitions else None, ) def add_text_batches( self, graph_id: str, chunks: List[str], batch_size: int = 3, progress_callback: Optional[Callable] = None ) -> List[str]: """分批添加文本到图谱，返回所有 episode 的 uuid 列表""" episode_uuids = [] total_chunks = len(chunks) for i in range(0, total_chunks, batch_size): batch_chunks = chunks[i:i + batch_size] batch_num = i // batch_size + 1 total_batches = (total_chunks + batch_size - 1) // batch_size if progress_callback: progress = (i + len(batch_chunks)) / total_chunks progress_callback( f"发送第 {batch_num}/{total_batches} 批数据 ({len(batch_chunks)} 块)...", progress ) # 构建episode数据 episodes = [ EpisodeData(data=chunk, type="text") for chunk in batch_chunks ] # 发送到Zep try: batch_result = self.client.graph.add_batch( graph_id=graph_id, episodes=episodes ) # 收集返回的 episode uuid if batch_result and isinstance(batch_result, list): for ep in batch_result: ep_uuid = getattr(ep, 'uuid_', None) or getattr(ep, 'uuid', None) if ep_uuid: episode_uuids.append(ep_uuid) # 避免请求过快 time.sleep(1) except Exception as e: if progress_callback: progress_callback(f"批次 {batch_num} 发送失败: {str(e)}", 0) raise return episode_uuids def _wait_for_episodes( self, episode_uuids: List[str], progress_callback: Optional[Callable] = None, timeout: int = 600 ): """等待所有 episode 处理完成（通过查询每个 episode 的 processed 状态）""" if not episode_uuids: if progress_callback: progress_callback("无需等待（没有 episode）", 1.0) return start_time = time.time() pending_episodes = set(episode_uuids) completed_count = 0 total_episodes = len(episode_uuids) if progress_callback: progress_callback(f"开始等待 {total_episodes} 个文本块处理...", 0) while pending_episodes: if time.time() - start_time > timeout: if progress_callback: progress_callback( f"部分文本块超时，已完成 {completed_count}/{total_episodes}", completed_count / total_episodes ) break # 检查每个 episode 的处理状态 for ep_uuid in list(pending_episodes): try: episode = self.client.graph.episode.get(uuid_=ep_uuid) is_processed = getattr(episode, 'processed', False) if is_processed: pending_episodes.remove(ep_uuid) completed_count += 1 except Exception as e: # 忽略单个查询错误，继续 pass elapsed = int(time.time() - start_time) if progress_callback: progress_callback( f"Zep处理中... {completed_count}/{total_episodes} 完成, {len(pending_episodes)} 待处理 ({elapsed}秒)", completed_count / total_episodes if total_episodes > 0 else 0 ) if pending_episodes: time.sleep(3) # 每3秒检查一次 if progress_callback: progress_callback(f"处理完成: {completed_count}/{total_episodes}", 1.0) def _get_graph_info(self, graph_id: str) -> GraphInfo: """获取图谱信息""" # 获取节点（分页） nodes = fetch_all_nodes(self.client, graph_id) # 获取边（分页） edges = fetch_all_edges(self.client, graph_id) # 统计实体类型 entity_types = set() for node in nodes: if node.labels: for label in node.labels: if label not in ["Entity", "Node"]: entity_types.add(label) return GraphInfo( graph_id=graph_id, node_count=len(nodes), edge_count=len(edges), entity_types=list(entity_types) ) def get_graph_data(self, graph_id: str) -> Dict[str, Any]: """ 获取完整图谱数据（包含详细信息） Args: graph_id: 图谱ID Returns: 包含nodes和edges的字典，包括时间信息、属性等详细数据 """ nodes = fetch_all_nodes(self.client, graph_id) edges = fetch_all_edges(self.client, graph_id) # 创建节点映射用于获取节点名称 node_map = {} for node in nodes: node_map[node.uuid_] = node.name or "" nodes_data = [] for node in nodes: # 获取创建时间 created_at = getattr(node, 'created_at', None) if created_at: created_at = str(created_at) nodes_data.append({ "uuid": node.uuid_, "name": node.name, "labels": node.labels or [], "summary": node.summary or "", "attributes": node.attributes or {}, "created_at": created_at, }) edges_data = [] for edge in edges: # 获取时间信息 created_at = getattr(edge, 'created_at', None) valid_at = getattr(edge, 'valid_at', None) invalid_at = getattr(edge, 'invalid_at', None) expired_at = getattr(edge, 'expired_at', None) # 获取 episodes episodes = getattr(edge, 'episodes', None) or getattr(edge, 'episode_ids', None) if episodes and not isinstance(episodes, list): episodes = [str(episodes)] elif episodes: episodes = [str(e) for e in episodes] # 获取 fact_type fact_type = getattr(edge, 'fact_type', None) or edge.name or "" edges_data.append({ "uuid": edge.uuid_, "name": edge.name or "", "fact": edge.fact or "", "fact_type": fact_type, "source_node_uuid": edge.source_node_uuid, "target_node_uuid": edge.target_node_uuid, "source_node_name": node_map.get(edge.source_node_uuid, ""), "target_node_name": node_map.get(edge.target_node_uuid, ""), "attributes": edge.attributes or {}, "created_at": str(created_at) if created_at else None, "valid_at": str(valid_at) if valid_at else None, "invalid_at": str(invalid_at) if invalid_at else None, "expired_at": str(expired_at) if expired_at else None, "episodes": episodes or [], }) return { "graph_id": graph_id, "nodes": nodes_data, "edges": edges_data, "node_count": len(nodes_data), "edge_count": len(edges_data), } def delete_graph(self, graph_id: str): """删除图谱""" self.client.graph.delete(graph_id=graph_id)