feat(ingest/datahub-source): Allow ingesting aspects from the entitiesV2 API

metadata-ingestion/src/datahub/ingestion/source/datahub/config.py

@@ -1,3 +1,4 @@
+import os
 from typing import Optional
 
 from pydantic import Field, root_validator
@@ -67,9 +68,25 @@ class DataHubSourceConfig(StatefulIngestionConfigBase):
         ),
     )
 
+    pull_from_datahub_api: bool = Field(
+        default=False,
+        description="Use the DataHub API to fetch versioned aspects.",
+        hidden_from_docs=True,
+    )
+
+    max_workers: int = Field(
+        default=5 * (os.cpu_count() or 4),
+        description="Number of worker threads to use for datahub api ingestion.",
+        hidden_from_docs=True,
+    )
+
     @root_validator
     def check_ingesting_data(cls, values):
-        if not values.get("database_connection") and not values.get("kafka_connection"):
+        if (
+            not values.get("database_connection")
+            and not values.get("kafka_connection")
+            and not values.get("pull_from_datahub_api")
+        ):
             raise ValueError(
                 "Your current config will not ingest any data."
                 " Please specify at least one of `database_connection` or `kafka_connection`, ideally both."

metadata-ingestion/src/datahub/ingestion/source/datahub/datahub_api_reader.py

@@ -0,0 +1,49 @@
+import logging
+from concurrent import futures
+from typing import Dict, Iterable, List
+
+from datahub.emitter.mcp import MetadataChangeProposalWrapper
+from datahub.ingestion.graph.client import DataHubGraph
+from datahub.ingestion.graph.filters import RemovedStatusFilter
+from datahub.ingestion.source.datahub.config import DataHubSourceConfig
+from datahub.ingestion.source.datahub.report import DataHubSourceReport
+from datahub.metadata._schema_classes import _Aspect
+
+logger = logging.getLogger(__name__)
+
+# Should work for at least mysql, mariadb, postgres
+DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S.%f"
+
+
+class DataHubApiReader:
+    def __init__(
+        self,
+        config: DataHubSourceConfig,
+        report: DataHubSourceReport,
+        graph: DataHubGraph,
+    ):
+        self.config = config
+        self.report = report
+        self.graph = graph
+
+    def get_aspects(self) -> Iterable[MetadataChangeProposalWrapper]:
+        urns = self.graph.get_urns_by_filter(
+            status=RemovedStatusFilter.ALL,
+            batch_size=self.config.database_query_batch_size,
+        )
+        tasks: List[futures.Future[Iterable[MetadataChangeProposalWrapper]]] = []
+        with futures.ThreadPoolExecutor(
+            max_workers=self.config.max_workers
+        ) as executor:
+            for urn in urns:
+                tasks.append(executor.submit(self._get_aspects_for_urn, urn))
+            for task in futures.as_completed(tasks):
+                yield from task.result()
+
+    def _get_aspects_for_urn(self, urn: str) -> Iterable[MetadataChangeProposalWrapper]:
+        aspects: Dict[str, _Aspect] = self.graph.get_entity_semityped(urn)  # type: ignore
+        for aspect in aspects.values():
+            yield MetadataChangeProposalWrapper(
+                entityUrn=urn,
+                aspect=aspect,
+            )

metadata-ingestion/src/datahub/ingestion/source/datahub/datahub_source.py

@@ -15,6 +15,7 @@
 from datahub.ingestion.api.source_helpers import auto_workunit_reporter
 from datahub.ingestion.api.workunit import MetadataWorkUnit
 from datahub.ingestion.source.datahub.config import DataHubSourceConfig
+from datahub.ingestion.source.datahub.datahub_api_reader import DataHubApiReader
 from datahub.ingestion.source.datahub.datahub_database_reader import (
     DataHubDatabaseReader,
 )
@@ -58,6 +59,9 @@ def get_workunits_internal(self) -> Iterable[MetadataWorkUnit]:
         logger.info(f"Ingesting DataHub metadata up until {self.report.stop_time}")
         state = self.stateful_ingestion_handler.get_last_run_state()
 
+        if self.config.pull_from_datahub_api:
+            yield from self._get_api_workunits()
+
         if self.config.database_connection is not None:
             yield from self._get_database_workunits(
                 from_createdon=state.database_createdon_datetime
@@ -139,6 +143,18 @@ def _get_kafka_workunits(
                     )
                 self._commit_progress(i)
 
+    def _get_api_workunits(self) -> Iterable[MetadataWorkUnit]:
+        if self.ctx.graph is None:
+            self.report.report_failure(
+                "datahub_api",
+                "Specify datahub_api on your ingestion recipe to ingest from the DataHub API",
+            )
+            return
+
+        reader = DataHubApiReader(self.config, self.report, self.ctx.graph)
+        for mcp in reader.get_aspects():
+            yield mcp.as_workunit()
+
     def _commit_progress(self, i: Optional[int] = None) -> None:
         """Commit progress to stateful storage, if there have been no errors.