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443 | class BedrockEmbedding(BaseEmbedding):
model_name: str = Field(description="The modelId of the Bedrock model to use.")
profile_name: Optional[str] = Field(
default=None,
description="The name of aws profile to use. If not given, then the default profile is used.",
)
aws_access_key_id: Optional[str] = Field(
default=None, description="AWS Access Key ID to use"
)
aws_secret_access_key: Optional[str] = Field(
default=None, description="AWS Secret Access Key to use"
)
aws_session_token: Optional[str] = Field(
default=None, description="AWS Session Token to use"
)
region_name: Optional[str] = Field(
default=None,
description="AWS region name to use. Uses region configured in AWS CLI if not passed",
)
botocore_session: Optional[Any] = Field(
default=None,
description="Use this Botocore session instead of creating a new default one.",
exclude=True,
)
botocore_config: Optional[Any] = Field(
default=None,
description="Custom configuration object to use instead of the default generated one.",
exclude=True,
)
max_retries: int = Field(
default=10, description="The maximum number of API retries.", gt=0
)
timeout: float = Field(
default=60.0,
description="The timeout for the Bedrock API request in seconds. It will be used for both connect and read timeouts.",
)
additional_kwargs: Dict[str, Any] = Field(
default_factory=dict, description="Additional kwargs for the bedrock client."
)
_client: Any = PrivateAttr()
def __init__(
self,
model_name: str = Models.TITAN_EMBEDDING,
profile_name: Optional[str] = None,
aws_access_key_id: Optional[str] = None,
aws_secret_access_key: Optional[str] = None,
aws_session_token: Optional[str] = None,
region_name: Optional[str] = None,
client: Optional[Any] = None,
botocore_session: Optional[Any] = None,
botocore_config: Optional[Any] = None,
additional_kwargs: Optional[Dict[str, Any]] = None,
max_retries: int = 10,
timeout: float = 60.0,
callback_manager: Optional[CallbackManager] = None,
# base class
system_prompt: Optional[str] = None,
messages_to_prompt: Optional[Callable[[Sequence[ChatMessage]], str]] = None,
completion_to_prompt: Optional[Callable[[str], str]] = None,
pydantic_program_mode: PydanticProgramMode = PydanticProgramMode.DEFAULT,
output_parser: Optional[BaseOutputParser] = None,
**kwargs: Any,
):
additional_kwargs = additional_kwargs or {}
session_kwargs = {
"profile_name": profile_name,
"region_name": region_name,
"aws_access_key_id": aws_access_key_id,
"aws_secret_access_key": aws_secret_access_key,
"aws_session_token": aws_session_token,
"botocore_session": botocore_session,
}
try:
import boto3
from botocore.config import Config
config = (
Config(
retries={"max_attempts": max_retries, "mode": "standard"},
connect_timeout=timeout,
read_timeout=timeout,
)
if botocore_config is None
else botocore_config
)
session = boto3.Session(**session_kwargs)
except ImportError:
raise ImportError(
"boto3 package not found, install with" "'pip install boto3'"
)
super().__init__(
model_name=model_name,
max_retries=max_retries,
timeout=timeout,
botocore_config=config,
profile_name=profile_name,
aws_access_key_id=aws_access_key_id,
aws_secret_access_key=aws_secret_access_key,
aws_session_token=aws_session_token,
region_name=region_name,
botocore_session=botocore_session,
additional_kwargs=additional_kwargs,
callback_manager=callback_manager,
system_prompt=system_prompt,
messages_to_prompt=messages_to_prompt,
completion_to_prompt=completion_to_prompt,
pydantic_program_mode=pydantic_program_mode,
output_parser=output_parser,
**kwargs,
)
# Prior to general availability, custom boto3 wheel files were
# distributed that used the bedrock service to invokeModel.
# This check prevents any services still using those wheel files
# from breaking
if client is not None:
self._client = client
elif "bedrock-runtime" in session.get_available_services():
self._client = session.client("bedrock-runtime", config=config)
else:
self._client = session.client("bedrock", config=config)
@staticmethod
def list_supported_models() -> Dict[str, List[str]]:
list_models = {}
for provider in PROVIDERS:
list_models[provider.value] = [
m.value for m in Models if provider.value in m.value
]
return list_models
@classmethod
def class_name(self) -> str:
return "BedrockEmbedding"
@deprecated(
version="0.9.48",
reason=(
"Use the provided kwargs in the constructor, "
"set_credentials will be removed in future releases."
),
action="once",
)
def set_credentials(
self,
aws_region: Optional[str] = None,
aws_access_key_id: Optional[str] = None,
aws_secret_access_key: Optional[str] = None,
aws_session_token: Optional[str] = None,
aws_profile: Optional[str] = None,
) -> None:
aws_region = aws_region or os.getenv("AWS_REGION")
aws_access_key_id = aws_access_key_id or os.getenv("AWS_ACCESS_KEY_ID")
aws_secret_access_key = aws_secret_access_key or os.getenv(
"AWS_SECRET_ACCESS_KEY"
)
aws_session_token = aws_session_token or os.getenv("AWS_SESSION_TOKEN")
if aws_region is None:
warnings.warn(
"AWS_REGION not found. Set environment variable AWS_REGION or set aws_region"
)
if aws_access_key_id is None:
warnings.warn(
"AWS_ACCESS_KEY_ID not found. Set environment variable AWS_ACCESS_KEY_ID or set aws_access_key_id"
)
assert aws_access_key_id is not None
if aws_secret_access_key is None:
warnings.warn(
"AWS_SECRET_ACCESS_KEY not found. Set environment variable AWS_SECRET_ACCESS_KEY or set aws_secret_access_key"
)
assert aws_secret_access_key is not None
if aws_session_token is None:
warnings.warn(
"AWS_SESSION_TOKEN not found. Set environment variable AWS_SESSION_TOKEN or set aws_session_token"
)
assert aws_session_token is not None
session_kwargs = {
"profile_name": aws_profile,
"region_name": aws_region,
"aws_access_key_id": aws_access_key_id,
"aws_secret_access_key": aws_secret_access_key,
"aws_session_token": aws_session_token,
}
try:
import boto3
session = boto3.Session(**session_kwargs)
except ImportError:
raise ImportError(
"boto3 package not found, install with" "'pip install boto3'"
)
if "bedrock-runtime" in session.get_available_services():
self._client = session.client("bedrock-runtime")
else:
self._client = session.client("bedrock")
@classmethod
@deprecated(
version="0.9.48",
reason=(
"Use the provided kwargs in the constructor, "
"set_credentials will be removed in future releases."
),
action="once",
)
def from_credentials(
cls,
model_name: str = Models.TITAN_EMBEDDING,
aws_region: Optional[str] = None,
aws_access_key_id: Optional[str] = None,
aws_secret_access_key: Optional[str] = None,
aws_session_token: Optional[str] = None,
aws_profile: Optional[str] = None,
embed_batch_size: int = DEFAULT_EMBED_BATCH_SIZE,
callback_manager: Optional[CallbackManager] = None,
verbose: bool = False,
) -> "BedrockEmbedding":
"""
Instantiate using AWS credentials.
Args:
model_name (str) : Name of the model
aws_access_key_id (str): AWS access key ID
aws_secret_access_key (str): AWS secret access key
aws_session_token (str): AWS session token
aws_region (str): AWS region where the service is located
aws_profile (str): AWS profile, when None, default profile is chosen automatically
Example:
.. code-block:: python
from llama_index.embeddings import BedrockEmbedding
# Define the model name
model_name = "your_model_name"
embeddings = BedrockEmbedding.from_credentials(
model_name,
aws_access_key_id,
aws_secret_access_key,
aws_session_token,
aws_region,
aws_profile,
)
"""
session_kwargs = {
"profile_name": aws_profile,
"region_name": aws_region,
"aws_access_key_id": aws_access_key_id,
"aws_secret_access_key": aws_secret_access_key,
"aws_session_token": aws_session_token,
}
try:
import boto3
session = boto3.Session(**session_kwargs)
except ImportError:
raise ImportError(
"boto3 package not found, install with" "'pip install boto3'"
)
if "bedrock-runtime" in session.get_available_services():
client = session.client("bedrock-runtime")
else:
client = session.client("bedrock")
return cls(
client=client,
model=model_name,
embed_batch_size=embed_batch_size,
callback_manager=callback_manager,
verbose=verbose,
)
def _get_embedding(
self, payload: Union[str, List[str]], type: Literal["text", "query"]
) -> Union[Embedding, List[Embedding]]:
"""Get the embedding for the given payload.
Args:
payload (Union[str, List[str]]): The text or list of texts for which the embeddings are to be obtained.
type (Literal["text", "query"]): The type of the payload. It can be either "text" or "query".
Returns:
Union[Embedding, List[Embedding]]: The embedding or list of embeddings for the given payload. If the payload is a list of strings, then the response will be a list of embeddings.
"""
if self._client is None:
self.set_credentials()
if self._client is None:
raise ValueError("Client not set")
provider = self.model_name.split(".")[0]
request_body = self._get_request_body(provider, payload, type)
response = self._client.invoke_model(
body=request_body,
modelId=self.model_name,
accept="application/json",
contentType="application/json",
)
resp = json.loads(response.get("body").read().decode("utf-8"))
identifiers = PROVIDER_SPECIFIC_IDENTIFIERS.get(provider, None)
if identifiers is None:
raise ValueError("Provider not supported")
return identifiers["get_embeddings_func"](resp, isinstance(payload, list))
def _get_query_embedding(self, query: str) -> Embedding:
return self._get_embedding(query, "query")
def _get_text_embedding(self, text: str) -> Embedding:
return self._get_embedding(text, "text")
def _get_text_embeddings(self, texts: List[str]) -> List[Embedding]:
provider = self.model_name.split(".")[0]
if provider == PROVIDERS.COHERE:
return self._get_embedding(texts, "text")
return super()._get_text_embeddings(texts)
def _get_request_body(
self,
provider: str,
payload: Union[str, List[str]],
input_type: Literal["text", "query"],
) -> Any:
"""Build the request body as per the provider.
Currently supported providers are amazon, cohere.
amazon:
Sample Payload of type str
"Hello World!"
cohere:
Sample Payload of type dict of following format
{
'texts': ["This is a test document", "This is another document"],
'input_type': 'search_document'
}
"""
if provider == PROVIDERS.AMAZON:
if isinstance(payload, list):
raise ValueError("Amazon provider does not support list of texts")
titan_body_request = {"inputText": payload}
# Titan Embedding V2.0 has additional body parameters to check.
if "dimensions" in self.additional_kwargs:
if self.model_name == Models.TITAN_EMBEDDING_V2_0:
titan_body_request["dimensions"] = self.additional_kwargs[
"dimensions"
]
else:
raise ValueError(
"'dimensions' param not supported outside of 'titan-embed-text-v2:0' model."
)
if "normalize" in self.additional_kwargs:
if self.model_name == Models.TITAN_EMBEDDING_V2_0:
titan_body_request["normalize"] = self.additional_kwargs[
"normalize"
]
else:
raise ValueError(
"'normalize' param not supported outside of 'titan-embed-text-v2:0' model."
)
request_body = json.dumps(titan_body_request)
elif provider == PROVIDERS.COHERE:
input_types = {
"text": "search_document",
"query": "search_query",
}
payload = [payload] if isinstance(payload, str) else payload
payload = [p[:2048] if len(p) > 2048 else p for p in payload]
request_body = json.dumps(
{
"texts": payload,
"input_type": input_types[input_type],
}
)
else:
raise ValueError("Provider not supported")
return request_body
async def _aget_query_embedding(self, query: str) -> Embedding:
return self._get_embedding(query, "query")
async def _aget_text_embedding(self, text: str) -> Embedding:
return self._get_embedding(text, "text")
|
