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"""
Registry lineage generation for Feast objects.
This module provides functionality to generate relationship graphs between
Feast objects (entities, feature views, data sources, feature services)
for lineage visualization.
"""
from dataclasses import dataclass
from enum import Enum
from typing import Dict, List, Tuple
from feast.protos.feast.core.Registry_pb2 import Registry
class FeastObjectType(Enum):
DATA_SOURCE = "dataSource"
ENTITY = "entity"
FEATURE_VIEW = "featureView"
LABEL_VIEW = "labelView"
FEATURE_SERVICE = "featureService"
FEATURE = "feature"
@dataclass
class EntityReference:
type: FeastObjectType
name: str
def to_proto(self):
try:
from feast.protos.feast.registry.RegistryServer_pb2 import (
EntityReference as EntityReferenceProto,
)
return EntityReferenceProto(type=self.type.value, name=self.name)
except ImportError:
return {"type": self.type.value, "name": self.name}
@dataclass
class EntityRelation:
source: EntityReference
target: EntityReference
def to_proto(self):
try:
from feast.protos.feast.registry.RegistryServer_pb2 import (
EntityRelation as EntityRelationProto,
)
return EntityRelationProto(
source=self.source.to_proto(), target=self.target.to_proto()
)
except ImportError:
# Fallback to dict if protobuf not generated yet
return {"source": self.source.to_proto(), "target": self.target.to_proto()}
class RegistryLineageGenerator:
"""
Generates lineage relationships between Feast objects.
"""
def generate_lineage(
self, registry: Registry
) -> Tuple[List[EntityRelation], List[EntityRelation]]:
"""
Generate both direct and indirect relationships from registry objects.
Args:
registry: The registry protobuf containing all objects
Returns:
Tuple of (direct_relationships, indirect_relationships)
"""
direct_relationships = self._parse_direct_relationships(registry)
indirect_relationships = self._parse_indirect_relationships(
direct_relationships, registry
)
return direct_relationships, indirect_relationships
def _parse_direct_relationships(self, registry: Registry) -> List[EntityRelation]:
"""Parse direct relationships between objects."""
relationships = []
# FeatureService -> FeatureView/LabelView relationships
label_view_names = {
lv.spec.name
for lv in registry.label_views
if hasattr(lv, "spec") and lv.spec
}
for feature_service in registry.feature_services:
if (
hasattr(feature_service, "spec")
and feature_service.spec
and feature_service.spec.features
):
for feature in feature_service.spec.features:
view_type_str = getattr(feature, "view_type", "")
is_label_view = (
view_type_str == "labelView"
or feature.feature_view_name in label_view_names
)
source_type = (
FeastObjectType.LABEL_VIEW
if is_label_view
else FeastObjectType.FEATURE_VIEW
)
rel = EntityRelation(
source=EntityReference(source_type, feature.feature_view_name),
target=EntityReference(
FeastObjectType.FEATURE_SERVICE,
feature_service.spec.name,
),
)
relationships.append(rel)
# Entity -> FeatureView and DataSource -> FeatureView relationships
for feature_view in registry.feature_views:
if hasattr(feature_view, "spec") and feature_view.spec:
# Entity relationships
if hasattr(feature_view.spec, "entities"):
for entity_name in feature_view.spec.entities:
rel = EntityRelation(
source=EntityReference(FeastObjectType.ENTITY, entity_name),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, feature_view.spec.name
),
)
relationships.append(rel)
# Feature -> FeatureView relationships
if hasattr(feature_view.spec, "features"):
for feature in feature_view.spec.features:
rel = EntityRelation(
source=EntityReference(
FeastObjectType.FEATURE, feature.name
),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, feature_view.spec.name
),
)
relationships.append(rel)
# Batch source relationship
if (
hasattr(feature_view.spec, "batch_source")
and feature_view.spec.batch_source
):
# Try to get the data source name
data_source_name = None
if (
hasattr(feature_view.spec.batch_source, "name")
and feature_view.spec.batch_source.name
):
data_source_name = feature_view.spec.batch_source.name
elif (
hasattr(feature_view.spec.batch_source, "table")
and feature_view.spec.batch_source.table
):
# Fallback to table name for unnamed data sources
data_source_name = (
f"table:{feature_view.spec.batch_source.table}"
)
elif (
hasattr(feature_view.spec.batch_source, "path")
and feature_view.spec.batch_source.path
):
# Fallback to path for file-based sources
data_source_name = f"path:{feature_view.spec.batch_source.path}"
else:
# Use a generic identifier
data_source_name = f"unnamed_source_{hash(str(feature_view.spec.batch_source))}"
if data_source_name:
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE, data_source_name
),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, feature_view.spec.name
),
)
)
# OnDemand FeatureView: Feature -> OnDemandFeatureView relationships
for odfv in registry.on_demand_feature_views:
if hasattr(odfv, "spec") and odfv.spec:
# Entity relationships
if hasattr(odfv.spec, "entities"):
for entity_name in odfv.spec.entities:
rel = EntityRelation(
source=EntityReference(FeastObjectType.ENTITY, entity_name),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, odfv.spec.name
),
)
relationships.append(rel)
# Feature -> OnDemandFeatureView relationships
if hasattr(odfv.spec, "features"):
for feature in odfv.spec.features:
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.FEATURE, feature.name
),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, odfv.spec.name
),
)
)
# OnDemand FeatureView relationships
for odfv in registry.on_demand_feature_views:
if (
hasattr(odfv, "spec")
and odfv.spec
and hasattr(odfv.spec, "sources")
and odfv.spec.sources
):
# Handle protobuf map structure
if hasattr(odfv.spec.sources, "items"):
source_items = odfv.spec.sources.items()
else:
# Fallback for different protobuf representations
source_items = [(k, v) for k, v in enumerate(odfv.spec.sources)]
for source_name, source in source_items:
if (
hasattr(source, "request_data_source")
and source.request_data_source
):
if hasattr(source.request_data_source, "name"):
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE,
source.request_data_source.name,
),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, odfv.spec.name
),
)
)
elif (
hasattr(source, "feature_view_projection")
and source.feature_view_projection
):
# Find the source feature view's batch source
if hasattr(source.feature_view_projection, "feature_view_name"):
source_fv = next(
(
fv
for fv in registry.feature_views
if hasattr(fv, "spec")
and fv.spec
and hasattr(fv.spec, "name")
and fv.spec.name
== source.feature_view_projection.feature_view_name
),
None,
)
if (
source_fv
and hasattr(source_fv, "spec")
and source_fv.spec
and hasattr(source_fv.spec, "batch_source")
and source_fv.spec.batch_source
and hasattr(source_fv.spec.batch_source, "name")
):
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE,
source_fv.spec.batch_source.name,
),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, odfv.spec.name
),
)
)
# Stream FeatureView relationships
for sfv in registry.stream_feature_views:
if hasattr(sfv, "spec") and sfv.spec:
# Stream source
if (
hasattr(sfv.spec, "stream_source")
and sfv.spec.stream_source
and hasattr(sfv.spec.stream_source, "name")
and sfv.spec.stream_source.name
):
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE, sfv.spec.stream_source.name
),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, sfv.spec.name
),
)
)
# Batch source
if (
hasattr(sfv.spec, "batch_source")
and sfv.spec.batch_source
and hasattr(sfv.spec.batch_source, "name")
and sfv.spec.batch_source.name
):
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE, sfv.spec.batch_source.name
),
target=EntityReference(
FeastObjectType.FEATURE_VIEW, sfv.spec.name
),
)
)
# LabelView relationships
for label_view in registry.label_views:
if hasattr(label_view, "spec") and label_view.spec:
# Entity relationships
if hasattr(label_view.spec, "entities"):
for entity_name in label_view.spec.entities:
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.ENTITY, entity_name
),
target=EntityReference(
FeastObjectType.LABEL_VIEW, label_view.spec.name
),
)
)
# Data source relationships: LabelView uses spec.source (PushSource)
# which contains a nested batch_source
if hasattr(label_view.spec, "source") and label_view.spec.source:
source = label_view.spec.source
# Link to the push source itself
if hasattr(source, "name") and source.name:
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE, source.name
),
target=EntityReference(
FeastObjectType.LABEL_VIEW, label_view.spec.name
),
)
)
# Link to the nested batch source
if (
hasattr(source, "batch_source")
and source.batch_source
and hasattr(source.batch_source, "name")
and source.batch_source.name
):
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE,
source.batch_source.name,
),
target=EntityReference(
FeastObjectType.LABEL_VIEW, label_view.spec.name
),
)
)
elif (
hasattr(label_view.spec, "batch_source")
and label_view.spec.batch_source
and hasattr(label_view.spec.batch_source, "name")
and label_view.spec.batch_source.name
):
relationships.append(
EntityRelation(
source=EntityReference(
FeastObjectType.DATA_SOURCE,
label_view.spec.batch_source.name,
),
target=EntityReference(
FeastObjectType.LABEL_VIEW, label_view.spec.name
),
)
)
return relationships
def _parse_indirect_relationships(
self, direct_relationships: List[EntityRelation], registry: Registry
) -> List[EntityRelation]:
"""Parse indirect relationships (transitive relationships through feature views)."""
indirect_relationships = []
# Create Entity -> FeatureService and DataSource -> FeatureService relationships
for feature_service in registry.feature_services:
if (
hasattr(feature_service, "spec")
and feature_service.spec
and hasattr(feature_service.spec, "features")
and feature_service.spec.features
):
for feature in feature_service.spec.features:
if hasattr(feature, "feature_view_name"):
# Find all relationships that target this feature view or label view
related_sources = [
rel.source
for rel in direct_relationships
if rel.target.name == feature.feature_view_name
and rel.target.type
in (
FeastObjectType.FEATURE_VIEW,
FeastObjectType.LABEL_VIEW,
)
]
# Create indirect relationships to the feature service
for source in related_sources:
indirect_relationships.append(
EntityRelation(
source=source,
target=EntityReference(
FeastObjectType.FEATURE_SERVICE,
feature_service.spec.name,
),
)
)
# Create Entity -> DataSource relationships (through feature views and label views)
# Build a map of view -> data sources
feature_view_to_data_sources: Dict[str, List[str]] = {}
for rel in direct_relationships:
if rel.source.type == FeastObjectType.DATA_SOURCE and rel.target.type in (
FeastObjectType.FEATURE_VIEW,
FeastObjectType.LABEL_VIEW,
):
if rel.target.name not in feature_view_to_data_sources:
feature_view_to_data_sources[rel.target.name] = []
feature_view_to_data_sources[rel.target.name].append(rel.source.name)
# For each Entity -> FeatureView/LabelView relationship, create Entity -> DataSource relationships
for rel in direct_relationships:
if rel.source.type == FeastObjectType.ENTITY and rel.target.type in (
FeastObjectType.FEATURE_VIEW,
FeastObjectType.LABEL_VIEW,
):
if rel.target.name in feature_view_to_data_sources:
for data_source_name in feature_view_to_data_sources[
rel.target.name
]:
indirect_relationships.append(
EntityRelation(
source=rel.source, # The entity
target=EntityReference(
FeastObjectType.DATA_SOURCE,
data_source_name,
),
)
)
return indirect_relationships
def get_object_relationships(
self,
registry: Registry,
object_type: str,
object_name: str,
include_indirect: bool = False,
) -> List[EntityRelation]:
"""
Get all relationships for a specific object.
Args:
registry: The registry protobuf
object_type: Type of the object (dataSource, entity, featureView, featureService)
object_name: Name of the object
include_indirect: Whether to include indirect relationships
Returns:
List of relationships involving the specified object
"""
direct_relationships, indirect_relationships = self.generate_lineage(registry)
all_relationships = direct_relationships[:]
if include_indirect:
all_relationships.extend(indirect_relationships)
# Filter relationships involving the specified object
filtered_relationships = []
target_type = FeastObjectType(object_type)
for rel in all_relationships:
if (rel.source.type == target_type and rel.source.name == object_name) or (
rel.target.type == target_type and rel.target.name == object_name
):
filtered_relationships.append(rel)
return filtered_relationships
def get_object_lineage_graph(
self, registry: Registry, object_type: str, object_name: str, depth: int = 2
) -> Dict:
"""
Get a complete lineage graph for an object up to specified depth.
This can be used for more complex lineage queries and visualization.
"""
direct_relationships, indirect_relationships = self.generate_lineage(registry)
all_relationships = direct_relationships + indirect_relationships
# Build adjacency graph
graph: Dict[str, List[str]] = {}
for rel in all_relationships:
source_key = f"{rel.source.type.value}:{rel.source.name}"
target_key = f"{rel.target.type.value}:{rel.target.name}"
if source_key not in graph:
graph[source_key] = []
graph[source_key].append(target_key)
# Perform BFS to get subgraph up to specified depth
start_key = f"{object_type}:{object_name}"
visited = set()
result_nodes = set()
result_edges = []
def bfs(current_key, current_depth):
if current_depth > depth or current_key in visited:
return
visited.add(current_key)
result_nodes.add(current_key)
if current_key in graph:
for neighbor in graph[current_key]:
result_edges.append((current_key, neighbor))
result_nodes.add(neighbor)
bfs(neighbor, current_depth + 1)
bfs(start_key, 0)
return {"nodes": list(result_nodes), "edges": result_edges}