elasticsearch[patch], community[patch]: update references, deprecate community classes (#18506)

Follow up on https://github.com/langchain-ai/langchain/pull/17467.

- Update all references to the Elasticsearch classes to use the partners
package.
- Deprecate community classes.

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>

libs/community/langchain_community/chat_message_histories/elasticsearch.py

@@ -3,6 +3,7 @@ import logging
 from time import time
 from typing import TYPE_CHECKING, Any, Dict, List, Optional
 
+from langchain_core._api import deprecated
 from langchain_core.chat_history import BaseChatMessageHistory
 from langchain_core.messages import (
     BaseMessage,
@@ -16,6 +17,7 @@ if TYPE_CHECKING:
 logger = logging.getLogger(__name__)
 
 
+@deprecated("0.0.27", alternative="Use langchain-elasticsearch package", pending=True)
 class ElasticsearchChatMessageHistory(BaseChatMessageHistory):
     """Chat message history that stores history in Elasticsearch.
 

libs/community/langchain_community/embeddings/elasticsearch.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING, List, Optional
 
+from langchain_core._api import deprecated
 from langchain_core.utils import get_from_env
 
 if TYPE_CHECKING:
@@ -11,6 +12,9 @@ if TYPE_CHECKING:
 from langchain_core.embeddings import Embeddings
 
 
+@deprecated(
+    "0.1.11", alternative="Use class in langchain-elasticsearch package", pending=True
+)
 class ElasticsearchEmbeddings(Embeddings):
     """Elasticsearch embedding models.
 

libs/community/langchain_community/vectorstores/elastic_vector_search.py

@@ -50,6 +50,11 @@ def _default_script_query(query_vector: List[float], filter: Optional[dict]) ->
     }
 
 
+@deprecated(
+    "0.0.27",
+    alternative="Use ElasticsearchStore class in langchain-elasticsearch package",
+    pending=True,
+)
 class ElasticVectorSearch(VectorStore):
     """
 
@@ -358,7 +363,11 @@ class ElasticVectorSearch(VectorStore):
             self.client.delete(index=self.index_name, id=id)
 
 
-@deprecated("0.0.1", alternative="ElasticsearchStore class.", pending=True)
+@deprecated(
+    "0.0.1",
+    alternative="Use ElasticsearchStore class in langchain-elasticsearch package",
+    pending=True,
+)
 class ElasticKnnSearch(VectorStore):
     """[DEPRECATED] `Elasticsearch` with k-nearest neighbor search
     (`k-NN`) vector store.

libs/community/langchain_community/vectorstores/elasticsearch.py

@@ -15,6 +15,7 @@ from typing import (
 )
 
 import numpy as np
+from langchain_core._api import deprecated
 from langchain_core.documents import Document
 from langchain_core.embeddings import Embeddings
 from langchain_core.vectorstores import VectorStore
@@ -113,6 +114,9 @@ class BaseRetrievalStrategy(ABC):
         return True
 
 
+@deprecated(
+    "0.0.27", alternative="Use class in langchain-elasticsearch package", pending=True
+)
 class ApproxRetrievalStrategy(BaseRetrievalStrategy):
     """Approximate retrieval strategy using the `HNSW` algorithm."""
 
@@ -233,6 +237,9 @@ class ApproxRetrievalStrategy(BaseRetrievalStrategy):
         }
 
 
+@deprecated(
+    "0.0.27", alternative="Use class in langchain-elasticsearch package", pending=True
+)
 class ExactRetrievalStrategy(BaseRetrievalStrategy):
     """Exact retrieval strategy using the `script_score` query."""
 
@@ -300,6 +307,9 @@ class ExactRetrievalStrategy(BaseRetrievalStrategy):
         }
 
 
+@deprecated(
+    "0.0.27", alternative="Use class in langchain-elasticsearch package", pending=True
+)
 class SparseRetrievalStrategy(BaseRetrievalStrategy):
     """Sparse retrieval strategy using the `text_expansion` processor."""
 
@@ -381,6 +391,9 @@ class SparseRetrievalStrategy(BaseRetrievalStrategy):
         return False
 
 
+@deprecated(
+    "0.0.27", alternative="Use class in langchain-elasticsearch package", pending=True
+)
 class ElasticsearchStore(VectorStore):
     """`Elasticsearch` vector store.