"""Module providing Infinispan as a VectorStore"""
from __future__ import annotations
import json
import logging
import uuid
from typing import (
Any,
Iterable,
List,
Optional,
Tuple,
Type,
)
import requests
from langchain_core.documents import Document
from langchain_core.embeddings import Embeddings
from langchain_core.vectorstores import VectorStore
logger = logging.getLogger(__name__)
[docs]class InfinispanVS(VectorStore):
"""`Infinispan` VectorStore interface.
This class exposes the method to present Infinispan as a
VectorStore. It relies on the Infinispan class (below) which takes care
of the REST interface with the server.
Example:
.. code-block:: python
from langchain_community.vectorstores import InfinispanVS
from mymodels import RGBEmbeddings
vectorDb = InfinispanVS.from_documents(docs,
embedding=RGBEmbeddings(),
output_fields=["texture", "color"],
lambda_key=lambda text,meta: str(meta["_key"]),
lambda_content=lambda item: item["color"])
"""
[docs] def __init__(
self,
embedding: Optional[Embeddings] = None,
ids: Optional[List[str]] = None,
clear_old: Optional[bool] = True,
**kwargs: Any,
):
self.ispn = Infinispan(**kwargs)
self._configuration = kwargs
self._cache_name = str(self._configuration.get("cache_name", "vector"))
self._entity_name = str(self._configuration.get("entity_name", "vector"))
self._embedding = embedding
self._textfield = self._configuration.get("textfield", "text")
self._vectorfield = self._configuration.get("vectorfield", "vector")
self._to_content = self._configuration.get(
"lambda_content", lambda item: self._default_content(item)
)
self._to_metadata = self._configuration.get(
"lambda_metadata", lambda item: self._default_metadata(item)
)
self._output_fields = self._configuration.get("output_fields")
self._ids = ids
if clear_old:
self.ispn.cache_clear(self._cache_name)
def _default_metadata(self, item: dict) -> dict:
meta = dict(item)
meta.pop(self._vectorfield, None)
meta.pop(self._textfield, None)
meta.pop("_type", None)
return meta
def _default_content(self, item: dict[str, Any]) -> Any:
return item.get(self._textfield)
[docs] def schema_create(self, proto: str) -> requests.Response:
"""Deploy the schema for the vector db
Args:
proto(str): protobuf schema
Returns:
An http Response containing the result of the operation
"""
return self.ispn.schema_post(self._entity_name + ".proto", proto)
[docs] def schema_delete(self) -> requests.Response:
"""Delete the schema for the vector db
Returns:
An http Response containing the result of the operation
"""
return self.ispn.schema_delete(self._entity_name + ".proto")
[docs] def cache_create(self, config: str = "") -> requests.Response:
"""Create the cache for the vector db
Args:
config(str): configuration of the cache.
Returns:
An http Response containing the result of the operation
"""
if config == "":
config = (
'''
{
"distributed-cache": {
"owners": "2",
"mode": "SYNC",
"statistics": true,
"encoding": {
"media-type": "application/x-protostream"
},
"indexing": {
"enabled": true,
"storage": "filesystem",
"startup-mode": "AUTO",
"indexing-mode": "AUTO",
"indexed-entities": [
"'''
+ self._entity_name
+ """"
]
}
}
}
"""
)
return self.ispn.cache_post(self._cache_name, config)
[docs] def cache_delete(self) -> requests.Response:
"""Delete the cache for the vector db
Returns:
An http Response containing the result of the operation
"""
return self.ispn.cache_delete(self._cache_name)
[docs] def cache_clear(self) -> requests.Response:
"""Clear the cache for the vector db
Returns:
An http Response containing the result of the operation
"""
return self.ispn.cache_clear(self._cache_name)
[docs] def cache_index_clear(self) -> requests.Response:
"""Clear the index for the vector db
Returns:
An http Response containing the result of the operation
"""
return self.ispn.index_clear(self._cache_name)
[docs] def cache_index_reindex(self) -> requests.Response:
"""Rebuild the for the vector db
Returns:
An http Response containing the result of the operation
"""
return self.ispn.index_reindex(self._cache_name)
[docs] def add_texts(
self,
texts: Iterable[str],
metadatas: Optional[List[dict]] = None,
**kwargs: Any,
) -> List[str]:
result = []
embeds = self._embedding.embed_documents(list(texts)) # type: ignore
if not metadatas:
metadatas = [{} for _ in texts]
ids = self._ids or [str(uuid.uuid4()) for _ in texts]
data_input = list(zip(metadatas, embeds, ids))
for metadata, embed, key in data_input:
data = {"_type": self._entity_name, self._vectorfield: embed}
data.update(metadata)
data_str = json.dumps(data)
self.ispn.put(key, data_str, self._cache_name)
result.append(key)
return result
[docs] def similarity_search(
self, query: str, k: int = 4, **kwargs: Any
) -> List[Document]:
"""Return docs most similar to query."""
documents = self.similarity_search_with_score(query=query, k=k)
return [doc for doc, _ in documents]
[docs] def similarity_search_with_score(
self, query: str, k: int = 4, **kwargs: Any
) -> List[Tuple[Document, float]]:
"""Perform a search on a query string and return results with score.
Args:
query (str): The text being searched.
k (int, optional): The amount of results to return. Defaults to 4.
Returns:
List[Tuple[Document, float]]
"""
embed = self._embedding.embed_query(query) # type: ignore
documents = self.similarity_search_with_score_by_vector(embedding=embed, k=k)
return documents
[docs] def similarity_search_by_vector(
self, embedding: List[float], k: int = 4, **kwargs: Any
) -> List[Document]:
res = self.similarity_search_with_score_by_vector(embedding, k)
return [doc for doc, _ in res]
[docs] def similarity_search_with_score_by_vector(
self, embedding: List[float], k: int = 4
) -> List[Tuple[Document, float]]:
"""Return docs most similar to embedding vector.
Args:
embedding: Embedding to look up documents similar to.
k: Number of Documents to return. Defaults to 4.
Returns:
List of pair (Documents, score) most similar to the query vector.
"""
if self._output_fields is None:
query_str = (
"select v, score(v) from "
+ self._entity_name
+ " v where v."
+ self._vectorfield
+ " <-> "
+ json.dumps(embedding)
+ "~"
+ str(k)
)
else:
query_proj = "select "
for field in self._output_fields[:-1]:
query_proj = query_proj + "v." + field + ","
query_proj = query_proj + "v." + self._output_fields[-1]
query_str = (
query_proj
+ ", score(v) from "
+ self._entity_name
+ " v where v."
+ self._vectorfield
+ " <-> "
+ json.dumps(embedding)
+ "~"
+ str(k)
)
query_res = self.ispn.req_query(query_str, self._cache_name)
result = json.loads(query_res.text)
return self._query_result_to_docs(result)
def _query_result_to_docs(
self, result: dict[str, Any]
) -> List[Tuple[Document, float]]:
documents = []
for row in result["hits"]:
hit = row["hit"] or {}
if self._output_fields is None:
entity = hit["*"]
else:
entity = {key: hit.get(key) for key in self._output_fields}
doc = Document(
page_content=self._to_content(entity),
metadata=self._to_metadata(entity),
)
documents.append((doc, hit["score()"]))
return documents
[docs] @classmethod
def from_texts(
cls: Type[InfinispanVS],
texts: List[str],
embedding: Embeddings,
metadatas: Optional[List[dict]] = None,
ids: Optional[List[str]] = None,
clear_old: Optional[bool] = None,
**kwargs: Any,
) -> InfinispanVS:
"""Return VectorStore initialized from texts and embeddings."""
infinispanvs = cls(embedding=embedding, ids=ids, clear_old=clear_old, **kwargs)
if texts:
infinispanvs.add_texts(texts, metadatas)
return infinispanvs
REST_TIMEOUT = 10
[docs]class Infinispan:
"""Helper class for `Infinispan` REST interface.
This class exposes the Infinispan operations needed to
create and set up a vector db.
You need a running Infinispan (15+) server without authentication.
You can easily start one, see: https://github.com/rigazilla/infinispan-vector#run-infinispan
"""
[docs] def __init__(self, **kwargs: Any):
self._configuration = kwargs
self._schema = str(self._configuration.get("schema", "http"))
self._host = str(self._configuration.get("hosts", ["127.0.0.1:11222"])[0])
self._default_node = self._schema + "://" + self._host
self._cache_url = str(self._configuration.get("cache_url", "/rest/v2/caches"))
self._schema_url = str(self._configuration.get("cache_url", "/rest/v2/schemas"))
self._use_post_for_query = str(
self._configuration.get("use_post_for_query", True)
)
[docs] def req_query(
self, query: str, cache_name: str, local: bool = False
) -> requests.Response:
"""Request a query
Args:
query(str): query requested
cache_name(str): name of the target cache
local(boolean): whether the query is local to clustered
Returns:
An http Response containing the result set or errors
"""
if self._use_post_for_query:
return self._query_post(query, cache_name, local)
return self._query_get(query, cache_name, local)
def _query_post(
self, query_str: str, cache_name: str, local: bool = False
) -> requests.Response:
api_url = (
self._default_node
+ self._cache_url
+ "/"
+ cache_name
+ "?action=search&local="
+ str(local)
)
data = {"query": query_str}
data_json = json.dumps(data)
response = requests.post(
api_url,
data_json,
headers={"Content-Type": "application/json"},
timeout=REST_TIMEOUT,
)
return response
def _query_get(
self, query_str: str, cache_name: str, local: bool = False
) -> requests.Response:
api_url = (
self._default_node
+ self._cache_url
+ "/"
+ cache_name
+ "?action=search&query="
+ query_str
+ "&local="
+ str(local)
)
response = requests.get(api_url, timeout=REST_TIMEOUT)
return response
[docs] def post(self, key: str, data: str, cache_name: str) -> requests.Response:
"""Post an entry
Args:
key(str): key of the entry
data(str): content of the entry in json format
cache_name(str): target cache
Returns:
An http Response containing the result of the operation
"""
api_url = self._default_node + self._cache_url + "/" + cache_name + "/" + key
response = requests.post(
api_url,
data,
headers={"Content-Type": "application/json"},
timeout=REST_TIMEOUT,
)
return response
[docs] def put(self, key: str, data: str, cache_name: str) -> requests.Response:
"""Put an entry
Args:
key(str): key of the entry
data(str): content of the entry in json format
cache_name(str): target cache
Returns:
An http Response containing the result of the operation
"""
api_url = self._default_node + self._cache_url + "/" + cache_name + "/" + key
response = requests.put(
api_url,
data,
headers={"Content-Type": "application/json"},
timeout=REST_TIMEOUT,
)
return response
[docs] def get(self, key: str, cache_name: str) -> requests.Response:
"""Get an entry
Args:
key(str): key of the entry
cache_name(str): target cache
Returns:
An http Response containing the entry or errors
"""
api_url = self._default_node + self._cache_url + "/" + cache_name + "/" + key
response = requests.get(
api_url, headers={"Content-Type": "application/json"}, timeout=REST_TIMEOUT
)
return response
[docs] def schema_post(self, name: str, proto: str) -> requests.Response:
"""Deploy a schema
Args:
name(str): name of the schema. Will be used as a key
proto(str): protobuf schema
Returns:
An http Response containing the result of the operation
"""
api_url = self._default_node + self._schema_url + "/" + name
response = requests.post(api_url, proto, timeout=REST_TIMEOUT)
return response
[docs] def cache_post(self, name: str, config: str) -> requests.Response:
"""Create a cache
Args:
name(str): name of the cache.
config(str): configuration of the cache.
Returns:
An http Response containing the result of the operation
"""
api_url = self._default_node + self._cache_url + "/" + name
response = requests.post(
api_url,
config,
headers={"Content-Type": "application/json"},
timeout=REST_TIMEOUT,
)
return response
[docs] def schema_delete(self, name: str) -> requests.Response:
"""Delete a schema
Args:
name(str): name of the schema.
Returns:
An http Response containing the result of the operation
"""
api_url = self._default_node + self._schema_url + "/" + name
response = requests.delete(api_url, timeout=REST_TIMEOUT)
return response
[docs] def cache_delete(self, name: str) -> requests.Response:
"""Delete a cache
Args:
name(str): name of the cache.
Returns:
An http Response containing the result of the operation
"""
api_url = self._default_node + self._cache_url + "/" + name
response = requests.delete(api_url, timeout=REST_TIMEOUT)
return response
[docs] def cache_clear(self, cache_name: str) -> requests.Response:
"""Clear a cache
Args:
cache_name(str): name of the cache.
Returns:
An http Response containing the result of the operation
"""
api_url = (
self._default_node + self._cache_url + "/" + cache_name + "?action=clear"
)
response = requests.post(api_url, timeout=REST_TIMEOUT)
return response
[docs] def index_clear(self, cache_name: str) -> requests.Response:
"""Clear an index on a cache
Args:
cache_name(str): name of the cache.
Returns:
An http Response containing the result of the operation
"""
api_url = (
self._default_node
+ self._cache_url
+ "/"
+ cache_name
+ "/search/indexes?action=clear"
)
return requests.post(api_url, timeout=REST_TIMEOUT)
[docs] def index_reindex(self, cache_name: str) -> requests.Response:
"""Rebuild index on a cache
Args:
cache_name(str): name of the cache.
Returns:
An http Response containing the result of the operation
"""
api_url = (
self._default_node
+ self._cache_url
+ "/"
+ cache_name
+ "/search/indexes?action=reindex"
)
return requests.post(api_url, timeout=REST_TIMEOUT)