velesdb-common 2.0.0

Shared utilities for VelesDB Python integrations (internal use)

velesdb-common

Shared utilities for VelesDB Python integrations.

This package is not a public API. End users should install and import from langchain-velesdb, llama-index-vector-stores-velesdb, or haystack-velesdb directly.

What it provides

velesdb-common centralizes code shared by all three Python RAG framework integration packages:

• Security validators — input sanitization for collection names, dimensions, queries, URLs
• ID generation — deterministic hashing and sequential ID counters
• Graph helpers — REST payload builders and native graph bindings
• Memory formatting — procedural memory result formatting

Public Exports

The following symbols form the stable internal API consumed by langchain-velesdb, llama-index-vector-stores-velesdb, and haystack-velesdb. They are not intended for direct use by end users.

Fusion

Export	Type	Description
build_fusion_strategy	function	Converts a strategy name + params dict into the native FusionStrategy object

Shared mixins / bases

Export	Type	Description
CollectionAdminMixin	class	Mixin providing shared admin operations (flush, get_collection_info, is_empty)
GraphOpsBase	class	Base class for graph query helpers used by both integrations

ID helpers

Export	Type	Description
stable_hash_id	function	Deterministic 64-bit hash of an input string (used as collection-stable ID)
make_initial_id_counter	function	Builds a thread-safe sequential ID counter seeded from existing collection state

Memory helpers

Export	Type	Description
format_procedural_results	function	Normalizes raw procedural-memory recall output into a stable result list
store_procedure	function	Inserts a procedural-memory entry with the canonical schema used by both integrations

Security: validators

Export	Type	Description
SecurityError	exception	Raised by every validate_* on rejected input
validate_url	function	Validates a server URL string
validate_text	function	Sanitizes free-text query strings against injection patterns
validate_query	function	Validates VelesQL query strings against length / character limits
validate_collection_name	function	Alphanumeric + underscore, ≤ 64 chars
validate_dimension	function	Within MIN_DIMENSION..=MAX_DIMENSION
validate_metric	function	Against ALLOWED_METRICS
validate_storage_mode	function	Against ALLOWED_STORAGE_MODES / STORAGE_MODE_ALIASES
validate_path	function	Filesystem path bounds + character rules
validate_k	function	k value in [1, MAX_K_VALUE]
validate_batch_size	function	Batch size in [1, MAX_BATCH_SIZE]
validate_timeout	function	Timeout ms within sane bounds
validate_weight	function	Fusion weight in [0.0, 1.0]
validate_sparse_vector	function	Sparse pair list bounds

Security: constants

Export	Type	Description
ALLOWED_METRICS	set	Canonical metric strings (cosine, euclidean, dot, …)
ALLOWED_STORAGE_MODES	set	Canonical storage modes (full, sq8, binary, pq, rabitq)
STORAGE_MODE_ALIASES	dict	Alias → canonical mapping (e.g. int8 → sq8)
DEFAULT_TIMEOUT_MS	int	Default timeout used when callers don't specify one
MIN_DIMENSION / MAX_DIMENSION	int	Vector dimension bounds
MAX_BATCH_SIZE	int	Hard cap on per-call batch operations
MAX_K_VALUE	int	Hard cap on retrieval k
MAX_PATH_LENGTH	int	Filesystem path length cap
MAX_QUERY_LENGTH	int	VelesQL query length cap
MAX_SPARSE_VECTOR_SIZE	int	Sparse vector non-zero entry cap
MAX_TEXT_LENGTH	int	Free-text query length cap

Graph helpers

Export	Type	Description
build_graph_rest_payload	function	Constructs the JSON body for REST-backed graph traversal calls
parse_graph_traverse_response	function	Decodes a graph traversal REST response into the shared result shape
open_native_graph	function	Opens (or attaches to) a native-backend graph collection
is_timeout_exception	function	Cross-backend timeout-error predicate

License

MIT License (this integration). See LICENSE for details.

VelesDB Core itself is licensed under the VelesDB Core License 1.0 (based on ELv2).