Revert mosec embedding microservice to to use synchronous interface. (opea-project#971)

* Revert mosec embedding microservice to  to use synchronous interface.

Signed-off-by: Yao, Qing <[email protected]>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Add dependency.

Signed-off-by: Yao, Qing <[email protected]>

---------

Signed-off-by: Yao, Qing <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: yao531441

comps/embeddings/mosec/langchain/embedding_mosec.py

@@ -7,6 +7,7 @@
 from typing import List, Optional, Union
 
 from langchain_community.embeddings import OpenAIEmbeddings
+from langchain_community.embeddings.openai import async_embed_with_retry
 
 from comps import (
     CustomLogger,
@@ -35,7 +36,7 @@ async def _aget_len_safe_embeddings(
     ) -> List[List[float]]:
         _chunk_size = chunk_size or self.chunk_size
         batched_embeddings: List[List[float]] = []
-        response = self.client.create(input=texts, **self._invocation_params)
+        response = await async_embed_with_retry(self, input=texts, **self._invocation_params)
         if not isinstance(response, dict):
             response = response.model_dump()
         batched_embeddings.extend(r["embedding"] for r in response["data"])
@@ -45,7 +46,7 @@ async def _aget_len_safe_embeddings(
         async def empty_embedding() -> List[float]:
             nonlocal _cached_empty_embedding
             if _cached_empty_embedding is None:
-                average_embedded = self.client.create(input="", **self._invocation_params)
+                average_embedded = await async_embed_with_retry(self, input="", **self._invocation_params)
                 if not isinstance(average_embedded, dict):
                     average_embedded = average_embedded.model_dump()
                 _cached_empty_embedding = average_embedded["data"][0]["embedding"]
@@ -57,6 +58,29 @@ async def get_embedding(e: Optional[List[float]]) -> List[float]:
         embeddings = await asyncio.gather(*[get_embedding(e) for e in batched_embeddings])
         return embeddings
 
+    def _get_len_safe_embeddings(
+        self, texts: List[str], *, engine: str, chunk_size: Optional[int] = None
+    ) -> List[List[float]]:
+        _chunk_size = chunk_size or self.chunk_size
+        batched_embeddings: List[List[float]] = []
+        response = self.client.create(input=texts, **self._invocation_params)
+        if not isinstance(response, dict):
+            response = response.model_dump()
+        batched_embeddings.extend(r["embedding"] for r in response["data"])
+
+        _cached_empty_embedding: Optional[List[float]] = None
+
+        def empty_embedding() -> List[float]:
+            nonlocal _cached_empty_embedding
+            if _cached_empty_embedding is None:
+                average_embedded = self.client.create(input="", **self._invocation_params)
+                if not isinstance(average_embedded, dict):
+                    average_embedded = average_embedded.model_dump()
+                _cached_empty_embedding = average_embedded["data"][0]["embedding"]
+            return _cached_empty_embedding
+
+        return [e if e is not None else empty_embedding() for e in batched_embeddings]
+
 
 @register_microservice(
     name="opea_service@embedding_mosec",
@@ -68,18 +92,18 @@ async def get_embedding(e: Optional[List[float]]) -> List[float]:
     output_datatype=EmbedDoc,
 )
 @register_statistics(names=["opea_service@embedding_mosec"])
-async def embedding(
+def embedding(
     input: Union[TextDoc, EmbeddingRequest, ChatCompletionRequest]
 ) -> Union[EmbedDoc, EmbeddingResponse, ChatCompletionRequest]:
     if logflag:
         logger.info(input)
     start = time.time()
     if isinstance(input, TextDoc):
-        embed_vector = await get_embeddings(input.text)
+        embed_vector = get_embeddings(input.text)
         embedding_res = embed_vector[0] if isinstance(input.text, str) else embed_vector
         res = EmbedDoc(text=input.text, embedding=embedding_res)
     else:
-        embed_vector = await get_embeddings(input.input)
+        embed_vector = get_embeddings(input.input)
         if input.dimensions is not None:
             embed_vector = [embed_vector[i][: input.dimensions] for i in range(len(embed_vector))]
 
@@ -99,9 +123,9 @@ async def embedding(
     return res
 
 
-async def get_embeddings(text: Union[str, List[str]]) -> List[List[float]]:
+def get_embeddings(text: Union[str, List[str]]) -> List[List[float]]:
     texts = [text] if isinstance(text, str) else text
-    embed_vector = await embeddings.aembed_documents(texts)
+    embed_vector = embeddings.embed_documents(texts)
     return embed_vector