rag_server/applications/async_task/chunk_task.py

import asyncio
from typing import List

from applications.api import get_basic_embedding
from applications.utils.async_utils import run_tasks_with_asyncio_task_group
from applications.utils.chunks import LLMClassifier, TopicAwarePackerV2
from applications.utils.milvus import async_insert_chunk
from applications.utils.mysql import ContentChunks, Contents
from applications.utils.nlp import num_tokens
from applications.config import Chunk, DEFAULT_MODEL
from applications.config import ELASTIC_SEARCH_INDEX


class ChunkEmbeddingTask(TopicAwarePackerV2):
    def __init__(self, doc_id, resource):
        super().__init__(doc_id)
        self.chunk_manager = None
        self.content_manager = None
        self.mysql_client = resource.mysql_client
        self.milvus_client = resource.milvus_client
        self.es_client = resource.es_client
        self.classifier = LLMClassifier()

    @staticmethod
    async def get_embedding_list(text: str) -> List:
        return await get_basic_embedding(text=text, model=DEFAULT_MODEL)

    def init_processer(self):
        self.content_manager = Contents(self.mysql_client)
        self.chunk_manager = ContentChunks(self.mysql_client)

    async def _chunk_each_content(
        self,
        doc_id: str,
        data: dict
    ) -> List[Chunk]:
        title, text = data.get("title", "").strip(), data["text"].strip()
        text_type = data.get("text_type", 1)
        dataset_id = data.get("dataset_id", 0)  # 默认知识库 id 为 0
        re_chunk = data.get("re_chunk", False)
        dont_chunk = data.get("dont_chunk", False)
        if re_chunk:
            await self.content_manager.update_content_info(
                doc_id=doc_id,
                text=text,
                text_type=text_type,
                title=title,
                dataset_id=dataset_id,
            )
            flag = True
        else:
            flag = await self.content_manager.insert_content(
                doc_id, text, text_type, title, dataset_id
            )
        if not flag:
            return []
        else:
            raw_chunks = await self.chunk(text, text_type, dataset_id, dont_chunk)
            if not raw_chunks:
                await self.content_manager.update_content_status(
                    doc_id=doc_id,
                    ori_status=self.INIT_STATUS,
                    new_status=self.FAILED_STATUS,
                )
                return []

            await self.content_manager.update_content_status(
                doc_id=doc_id,
                ori_status=self.INIT_STATUS,
                new_status=self.PROCESSING_STATUS,
            )
            return raw_chunks

    async def insert_into_es(self, milvus_id, chunk: Chunk) -> int:
        docs = [
            {
                "_index": ELASTIC_SEARCH_INDEX,
                "_id": milvus_id,
                "_source": {
                    "milvus_id": milvus_id,
                    "doc_id": chunk.doc_id,
                    "dataset_id": chunk.dataset_id,
                    "chunk_id": chunk.chunk_id,
                    "topic": chunk.topic,
                    "domain": chunk.domain,
                    "task_type": chunk.task_type,
                    "text_type": chunk.text_type,
                    "keywords": chunk.keywords,
                    "concepts": chunk.concepts,
                    "entities": chunk.entities,
                    "status": chunk.status,
                },
            }
        ]
        resp = await self.es_client.bulk_insert(docs)
        return resp["success"]

    async def save_each_chunk(self, chunk: Chunk):
        # insert
        flag = await self.chunk_manager.insert_chunk(chunk)
        if not flag:
            print("插入文本失败")
            return

        acquire_lock = await self.chunk_manager.update_chunk_status(
            doc_id=chunk.doc_id,
            chunk_id=chunk.chunk_id,
            ori_status=self.INIT_STATUS,
            new_status=self.PROCESSING_STATUS,
        )
        if not acquire_lock:
            print("抢占文本分块锁失败")
            return

        completion = await self.classifier.classify_chunk(chunk)
        if not completion:
            await self.chunk_manager.update_chunk_status(
                doc_id=chunk.doc_id,
                chunk_id=chunk.chunk_id,
                ori_status=self.PROCESSING_STATUS,
                new_status=self.FAILED_STATUS,
            )
            print("从deepseek获取信息失败")
            return

        update_flag = await self.chunk_manager.set_chunk_result(
            chunk=completion,
            ori_status=self.PROCESSING_STATUS,
            new_status=self.FINISHED_STATUS,
        )
        if not update_flag:
            await self.chunk_manager.update_chunk_status(
                doc_id=chunk.doc_id,
                chunk_id=chunk.chunk_id,
                ori_status=self.PROCESSING_STATUS,
                new_status=self.FAILED_STATUS,
            )
            return

        milvus_id = await self.save_to_milvus(completion)
        if not milvus_id:
            return

        # 存储到 es 中
        # acquire_lock
        acquire_es_lock = await self.chunk_manager.update_es_status(
            doc_id=chunk.doc_id,
            chunk_id=chunk.chunk_id,
            ori_status=self.INIT_STATUS,
            new_status=self.PROCESSING_STATUS,
        )
        if not acquire_es_lock:
            print(f"获取 es Lock Fail: {chunk.doc_id}--{chunk.chunk_id}")
            return

        insert_rows = await self.insert_into_es(milvus_id, completion)
        final_status = self.FINISHED_STATUS if insert_rows else self.FAILED_STATUS
        await self.chunk_manager.update_es_status(
            doc_id=chunk.doc_id,
            chunk_id=chunk.chunk_id,
            ori_status=self.PROCESSING_STATUS,
            new_status=final_status,
        )

    async def save_to_milvus(self, chunk: Chunk):
        """
        :param chunk: each single chunk
        :return:
        """
        # 抢锁
        acquire_lock = await self.chunk_manager.update_embedding_status(
            doc_id=chunk.doc_id,
            chunk_id=chunk.chunk_id,
            new_status=self.PROCESSING_STATUS,
            ori_status=self.INIT_STATUS,
        )
        if not acquire_lock:
            print(f"抢占-{chunk.doc_id}-{chunk.chunk_id}分块-embedding处理锁失败")
            return None
        try:
            data = {
                "doc_id": chunk.doc_id,
                "chunk_id": chunk.chunk_id,
                "vector_text": await self.get_embedding_list(chunk.text),
                "vector_summary": await self.get_embedding_list(chunk.summary),
                "vector_questions": await self.get_embedding_list(
                    ",".join(chunk.questions)
                ),
            }
            resp = await async_insert_chunk(self.milvus_client, data)
            if not resp:
                await self.chunk_manager.update_embedding_status(
                    doc_id=chunk.doc_id,
                    chunk_id=chunk.chunk_id,
                    ori_status=self.PROCESSING_STATUS,
                    new_status=self.FAILED_STATUS,
                )
                return None

            await self.chunk_manager.update_embedding_status(
                doc_id=chunk.doc_id,
                chunk_id=chunk.chunk_id,
                ori_status=self.PROCESSING_STATUS,
                new_status=self.FINISHED_STATUS,
            )
            milvus_id = resp[0]
            return milvus_id
        except Exception as e:
            await self.chunk_manager.update_embedding_status(
                doc_id=chunk.doc_id,
                chunk_id=chunk.chunk_id,
                ori_status=self.PROCESSING_STATUS,
                new_status=self.FAILED_STATUS,
            )
            print(f"存入向量数据库失败", e)
            return None

    async def deal(self, data):
        text = data.get("text", "")
        dont_chunk = data.get("dont_chunk", False)
        # 如果无需分块，判断text 长度
        if dont_chunk and num_tokens(text) >= self.max_tokens:
            return {
                "error": "文档超多模型支持的最大吞吐量"
            }

        self.init_processer()

        async def _process():

            chunks = await self._chunk_each_content(self.doc_id, data)
            if not chunks:
                return

            # # dev
            # for chunk in chunks:
            #     await self.save_each_chunk(chunk)

            await run_tasks_with_asyncio_task_group(
                task_list=chunks,
                handler=self.save_each_chunk,
                description="处理单篇文章分块",
                unit="chunk",
                max_concurrency=20,
            )

            await self.content_manager.update_content_status(
                doc_id=self.doc_id,
                ori_status=self.PROCESSING_STATUS,
                new_status=self.FINISHED_STATUS,
            )

        asyncio.create_task(_process())
        return self.doc_id