fix: repair deferred imports to preserve module-level names for test patching (#831)

A previous commit moved SDK imports into __init__/methods and
stashed them on self, which broke @patch targets in 24 unit tests.

This fixes the approach: chunker and pdf_decoder use module-level
sentinels with global/if-None guards so imports are still deferred but
patchable. Google AI Studio reverts to standard module-level imports
since the module is only loaded when communicating with Gemini.
Keeps lazy loading on other imports.
This commit is contained in:
cybermaggedon 2026-04-18 11:43:21 +01:00 committed by GitHub
parent d7745baab4
commit cce3acd84f
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GPG key ID: B5690EEEBB952194
4 changed files with 48 additions and 36 deletions

View file

@ -10,6 +10,8 @@ from prometheus_client import Histogram
from ... schema import TextDocument, Chunk, Metadata, Triples
from ... base import ChunkingService, ConsumerSpec, ProducerSpec
RecursiveCharacterTextSplitter = None
from ... provenance import (
chunk_uri as make_chunk_uri, derived_entity_triples,
set_graph, GRAPH_SOURCE,
@ -41,8 +43,12 @@ class Processor(ChunkingService):
self.default_chunk_size = chunk_size
self.default_chunk_overlap = chunk_overlap
from langchain_text_splitters import RecursiveCharacterTextSplitter
self.RecursiveCharacterTextSplitter = RecursiveCharacterTextSplitter
global RecursiveCharacterTextSplitter
if RecursiveCharacterTextSplitter is None:
from langchain_text_splitters import (
RecursiveCharacterTextSplitter as _cls,
)
RecursiveCharacterTextSplitter = _cls
if not hasattr(__class__, "chunk_metric"):
__class__.chunk_metric = Histogram(
@ -52,7 +58,7 @@ class Processor(ChunkingService):
2500, 4000, 6400, 10000, 16000]
)
self.text_splitter = self.RecursiveCharacterTextSplitter(
self.text_splitter = RecursiveCharacterTextSplitter(
chunk_size=chunk_size,
chunk_overlap=chunk_overlap,
length_function=len,
@ -105,7 +111,7 @@ class Processor(ChunkingService):
chunk_overlap = int(chunk_overlap)
# Create text splitter with effective parameters
text_splitter = self.RecursiveCharacterTextSplitter(
text_splitter = RecursiveCharacterTextSplitter(
chunk_size=chunk_size,
chunk_overlap=chunk_overlap,
length_function=len,

View file

@ -10,6 +10,8 @@ from prometheus_client import Histogram
from ... schema import TextDocument, Chunk, Metadata, Triples
from ... base import ChunkingService, ConsumerSpec, ProducerSpec
TokenTextSplitter = None
from ... provenance import (
chunk_uri as make_chunk_uri, derived_entity_triples,
set_graph, GRAPH_SOURCE,
@ -41,8 +43,10 @@ class Processor(ChunkingService):
self.default_chunk_size = chunk_size
self.default_chunk_overlap = chunk_overlap
from langchain_text_splitters import TokenTextSplitter
self.TokenTextSplitter = TokenTextSplitter
global TokenTextSplitter
if TokenTextSplitter is None:
from langchain_text_splitters import TokenTextSplitter as _cls
TokenTextSplitter = _cls
if not hasattr(__class__, "chunk_metric"):
__class__.chunk_metric = Histogram(
@ -52,7 +56,7 @@ class Processor(ChunkingService):
2500, 4000, 6400, 10000, 16000]
)
self.text_splitter = self.TokenTextSplitter(
self.text_splitter = TokenTextSplitter(
encoding_name="cl100k_base",
chunk_size=chunk_size,
chunk_overlap=chunk_overlap,
@ -104,7 +108,7 @@ class Processor(ChunkingService):
chunk_overlap = int(chunk_overlap)
# Create text splitter with effective parameters
text_splitter = self.TokenTextSplitter(
text_splitter = TokenTextSplitter(
encoding_name="cl100k_base",
chunk_size=chunk_size,
chunk_overlap=chunk_overlap,

View file

@ -15,6 +15,9 @@ from ... schema import Document, TextDocument, Metadata
from ... schema import librarian_request_queue, librarian_response_queue
from ... schema import Triples
from ... base import FlowProcessor, ConsumerSpec, ProducerSpec, LibrarianClient
PyPDFLoader = None
from ... provenance import (
document_uri, page_uri as make_page_uri, derived_entity_triples,
set_graph, GRAPH_SOURCE,
@ -128,7 +131,12 @@ class Processor(FlowProcessor):
fp.write(base64.b64decode(v.data))
fp.close()
from langchain_community.document_loaders import PyPDFLoader
global PyPDFLoader
if PyPDFLoader is None:
from langchain_community.document_loaders import (
PyPDFLoader as _cls,
)
PyPDFLoader = _cls
loader = PyPDFLoader(temp_path)
pages = loader.load()

View file

@ -18,6 +18,12 @@ import logging
# Module logger
logger = logging.getLogger(__name__)
from google import genai
from google.genai import types
from google.genai.types import HarmCategory, HarmBlockThreshold
from google.genai.errors import ClientError
from google.api_core.exceptions import ResourceExhausted
from .... exceptions import TooManyRequests
from .... base import LlmService, LlmResult, LlmChunk
@ -37,18 +43,6 @@ class Processor(LlmService):
temperature = params.get("temperature", default_temperature)
max_output = params.get("max_output", default_max_output)
from google import genai
from google.genai import types
from google.genai.types import HarmCategory, HarmBlockThreshold
from google.genai.errors import ClientError
from google.api_core.exceptions import ResourceExhausted
self.genai = genai
self.types = types
self.HarmCategory = HarmCategory
self.HarmBlockThreshold = HarmBlockThreshold
self.ClientError = ClientError
self.ResourceExhausted = ResourceExhausted
if api_key is None:
raise RuntimeError("Google AI Studio API key not specified")
@ -60,7 +54,7 @@ class Processor(LlmService):
}
)
self.client = self.genai.Client(api_key=api_key, vertexai=False)
self.client = genai.Client(api_key=api_key, vertexai=False)
self.default_model = model
self.temperature = temperature
self.max_output = max_output
@ -68,23 +62,23 @@ class Processor(LlmService):
# Cache for generation configs per model
self.generation_configs = {}
block_level = self.HarmBlockThreshold.BLOCK_ONLY_HIGH
block_level = HarmBlockThreshold.BLOCK_ONLY_HIGH
self.safety_settings = [
self.types.SafetySetting(
category = self.HarmCategory.HARM_CATEGORY_HATE_SPEECH,
types.SafetySetting(
category = HarmCategory.HARM_CATEGORY_HATE_SPEECH,
threshold = block_level,
),
self.types.SafetySetting(
category = self.HarmCategory.HARM_CATEGORY_HARASSMENT,
types.SafetySetting(
category = HarmCategory.HARM_CATEGORY_HARASSMENT,
threshold = block_level,
),
self.types.SafetySetting(
category = self.HarmCategory.HARM_CATEGORY_SEXUALLY_EXPLICIT,
types.SafetySetting(
category = HarmCategory.HARM_CATEGORY_SEXUALLY_EXPLICIT,
threshold = block_level,
),
self.types.SafetySetting(
category = self.HarmCategory.HARM_CATEGORY_DANGEROUS_CONTENT,
types.SafetySetting(
category = HarmCategory.HARM_CATEGORY_DANGEROUS_CONTENT,
threshold = block_level,
),
# There is a documentation conflict on whether or not
@ -104,7 +98,7 @@ class Processor(LlmService):
if cache_key not in self.generation_configs:
logger.info(f"Creating generation config for '{model_name}' with temperature {effective_temperature}")
self.generation_configs[cache_key] = self.types.GenerateContentConfig(
self.generation_configs[cache_key] = types.GenerateContentConfig(
temperature = effective_temperature,
top_p = 1,
top_k = 40,
@ -153,14 +147,14 @@ class Processor(LlmService):
return resp
except self.ResourceExhausted as e:
except ResourceExhausted as e:
logger.warning("Rate limit exceeded")
# Leave rate limit retries to the default handler
raise TooManyRequests()
except self.ClientError as e:
except ClientError as e:
# google-genai SDK throws ClientError for 4xx errors
if e.code == 429:
logger.warning(f"Rate limit exceeded (ClientError 429): {e}")
@ -229,11 +223,11 @@ class Processor(LlmService):
logger.debug("Streaming complete")
except self.ResourceExhausted:
except ResourceExhausted:
logger.warning("Rate limit exceeded during streaming")
raise TooManyRequests()
except self.ClientError as e:
except ClientError as e:
# google-genai SDK throws ClientError for 4xx errors
if e.code == 429:
logger.warning(f"Rate limit exceeded during streaming (ClientError 429): {e}")