forked from Archives/langchain
Adding shared chromaDB client option (#2886)
This pull request addresses the need to share a single `chromadb.Client` instance across multiple instances of the `Chroma` class. By implementing a shared client, we can maintain consistency and reduce resource usage when multiple instances of the `Chroma` classes are created. This is especially relevant in a web app, where having multiple `Chroma` instances with a `persist_directory` leads to these clients not being synced. This PR implements this option while keeping the rest of the architecture unchanged. **Changes:** 1. Add a client attribute to the `Chroma` class to store the shared `chromadb.Client` instance. 2. Modify the `from_documents` method to accept an optional client parameter. 3. Update the `from_documents` method to use the shared client if provided or create a new client if not provided. Let me know if anything needs to be modified - thanks again for your work on this incredible repo
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@ -60,6 +60,7 @@ class Chroma(VectorStore):
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persist_directory: Optional[str] = None,
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client_settings: Optional[chromadb.config.Settings] = None,
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collection_metadata: Optional[Dict] = None,
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client: Optional[chromadb.Client] = None,
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) -> None:
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"""Initialize with Chroma client."""
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try:
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@ -71,15 +72,20 @@ class Chroma(VectorStore):
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"Please install it with `pip install chromadb`."
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)
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if client is not None:
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self._client = client
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else:
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if client_settings:
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self._client_settings = client_settings
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else:
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self._client_settings = chromadb.config.Settings()
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if persist_directory is not None:
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self._client_settings = chromadb.config.Settings(
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chroma_db_impl="duckdb+parquet", persist_directory=persist_directory
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chroma_db_impl="duckdb+parquet",
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persist_directory=persist_directory,
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)
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self._client = chromadb.Client(self._client_settings)
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self._embedding_function = embedding_function
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self._persist_directory = persist_directory
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self._collection = self._client.get_or_create_collection(
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@ -279,6 +285,7 @@ class Chroma(VectorStore):
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collection_name: str = _LANGCHAIN_DEFAULT_COLLECTION_NAME,
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persist_directory: Optional[str] = None,
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client_settings: Optional[chromadb.config.Settings] = None,
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client: Optional[chromadb.Client] = None,
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**kwargs: Any,
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) -> Chroma:
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"""Create a Chroma vectorstore from a raw documents.
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@ -303,6 +310,7 @@ class Chroma(VectorStore):
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embedding_function=embedding,
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persist_directory=persist_directory,
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client_settings=client_settings,
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client=client,
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)
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chroma_collection.add_texts(texts=texts, metadatas=metadatas, ids=ids)
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return chroma_collection
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@ -316,6 +324,7 @@ class Chroma(VectorStore):
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collection_name: str = _LANGCHAIN_DEFAULT_COLLECTION_NAME,
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persist_directory: Optional[str] = None,
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client_settings: Optional[chromadb.config.Settings] = None,
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client: Optional[chromadb.Client] = None, # Add this line
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**kwargs: Any,
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) -> Chroma:
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"""Create a Chroma vectorstore from a list of documents.
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@ -343,4 +352,5 @@ class Chroma(VectorStore):
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collection_name=collection_name,
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persist_directory=persist_directory,
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client_settings=client_settings,
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client=client,
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)
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