"""This module contains the execution context objects that are internal to the system.
Not every property on these should be exposed to random Jane or Joe dagster user
so we have a different layer of objects that encode the explicit public API
in the user_context module.
"""
from abc import ABC, abstractmethod
from typing import (
TYPE_CHECKING,
AbstractSet,
Any,
Dict,
Iterable,
List,
Mapping,
NamedTuple,
Optional,
Set,
Union,
cast,
)
import dagster._check as check
from dagster._annotations import public
from dagster._core.definitions.events import AssetKey, AssetLineageInfo
from dagster._core.definitions.hook_definition import HookDefinition
from dagster._core.definitions.mode import ModeDefinition
from dagster._core.definitions.op_definition import OpDefinition
from dagster._core.definitions.partition import PartitionsDefinition, PartitionsSubset
from dagster._core.definitions.partition_key_range import PartitionKeyRange
from dagster._core.definitions.partition_mapping import infer_partition_mapping
from dagster._core.definitions.pipeline_base import IPipeline
from dagster._core.definitions.pipeline_definition import PipelineDefinition
from dagster._core.definitions.policy import RetryPolicy
from dagster._core.definitions.reconstruct import ReconstructablePipeline
from dagster._core.definitions.resource_definition import ScopedResourcesBuilder
from dagster._core.definitions.step_launcher import StepLauncher
from dagster._core.definitions.time_window_partitions import (
TimeWindow,
TimeWindowPartitionsDefinition,
)
from dagster._core.errors import DagsterInvariantViolationError
from dagster._core.execution.plan.handle import ResolvedFromDynamicStepHandle, StepHandle
from dagster._core.execution.plan.outputs import StepOutputHandle
from dagster._core.execution.plan.step import ExecutionStep
from dagster._core.execution.retries import RetryMode
from dagster._core.executor.base import Executor
from dagster._core.log_manager import DagsterLogManager
from dagster._core.storage.io_manager import IOManager
from dagster._core.storage.pipeline_run import DagsterRun
from dagster._core.storage.tags import (
ASSET_PARTITION_RANGE_END_TAG,
ASSET_PARTITION_RANGE_START_TAG,
MULTIDIMENSIONAL_PARTITION_PREFIX,
PARTITION_NAME_TAG,
)
from dagster._core.system_config.objects import ResolvedRunConfig
from dagster._core.types.dagster_type import DagsterType
from .input import InputContext
from .output import OutputContext, get_output_context
if TYPE_CHECKING:
from dagster._core.definitions.data_version import (
DataVersion,
)
from dagster._core.definitions.dependency import Node, NodeHandle
from dagster._core.definitions.job_definition import JobDefinition
from dagster._core.definitions.resource_definition import Resources
from dagster._core.event_api import EventLogRecord
from dagster._core.execution.plan.plan import ExecutionPlan
from dagster._core.execution.plan.state import KnownExecutionState
from dagster._core.instance import DagsterInstance
from .hook import HookContext
def is_iterable(obj: Any) -> bool:
try:
iter(obj)
except:
return False
return True
class IPlanContext(ABC):
"""Context interface to represent run information that does not require access to user code.
The information available via this interface is accessible to the system throughout a run.
"""
@property
@abstractmethod
def plan_data(self) -> "PlanData":
raise NotImplementedError()
@property
def pipeline(self) -> IPipeline:
return self.plan_data.pipeline
@property
def dagster_run(self) -> DagsterRun:
return self.plan_data.dagster_run
@property
def run_id(self) -> str:
return self.dagster_run.run_id
@property
def run_config(self) -> Mapping[str, object]:
return self.dagster_run.run_config
@property
def pipeline_name(self) -> str:
return self.dagster_run.pipeline_name
@property
def job_name(self) -> str:
return self.pipeline_name
@property
def instance(self) -> "DagsterInstance":
return self.plan_data.instance
@property
def raise_on_error(self) -> bool:
return self.plan_data.raise_on_error
@property
def retry_mode(self) -> RetryMode:
return self.plan_data.retry_mode
@property
def execution_plan(self) -> "ExecutionPlan":
return self.plan_data.execution_plan
@property
@abstractmethod
def output_capture(self) -> Optional[Mapping[StepOutputHandle, Any]]:
raise NotImplementedError()
@property
def log(self) -> DagsterLogManager:
raise NotImplementedError()
@property
def logging_tags(self) -> Mapping[str, str]:
return self.log.logging_metadata.to_tags()
def has_tag(self, key: str) -> bool:
check.str_param(key, "key")
return key in self.log.logging_metadata.pipeline_tags
def get_tag(self, key: str) -> Optional[str]:
check.str_param(key, "key")
return self.log.logging_metadata.pipeline_tags.get(key)
class PlanData(NamedTuple):
"""The data about a run that is available during both orchestration and execution.
This object does not contain any information that requires access to user code, such as the
pipeline definition and resources.
"""
pipeline: IPipeline
dagster_run: DagsterRun
instance: "DagsterInstance"
execution_plan: "ExecutionPlan"
raise_on_error: bool = False
retry_mode: RetryMode = RetryMode.DISABLED
class ExecutionData(NamedTuple):
"""The data that is available to the system during execution.
This object contains information that requires access to user code, such as the pipeline
definition and resources.
"""
scoped_resources_builder: ScopedResourcesBuilder
resolved_run_config: ResolvedRunConfig
pipeline_def: PipelineDefinition
mode_def: ModeDefinition
class IStepContext(IPlanContext):
"""Interface to represent data to be available during either step orchestration or execution."""
@property
@abstractmethod
def step(self) -> ExecutionStep:
raise NotImplementedError()
@property
@abstractmethod
def node_handle(self) -> "NodeHandle":
raise NotImplementedError()
class PlanOrchestrationContext(IPlanContext):
"""Context for the orchestration of a run.
This context assumes inability to run user code directly.
"""
def __init__(
self,
plan_data: PlanData,
log_manager: DagsterLogManager,
executor: Executor,
output_capture: Optional[Dict[StepOutputHandle, Any]],
resume_from_failure: bool = False,
):
self._plan_data = plan_data
self._log_manager = log_manager
self._executor = executor
self._output_capture = output_capture
self._resume_from_failure = resume_from_failure
@property
def plan_data(self) -> PlanData:
return self._plan_data
@property
def reconstructable_pipeline(self) -> ReconstructablePipeline:
if not isinstance(self.pipeline, ReconstructablePipeline):
raise DagsterInvariantViolationError(
"reconstructable_pipeline property must be a ReconstructablePipeline"
)
return self.pipeline
@property
def log(self) -> DagsterLogManager:
return self._log_manager
@property
def executor(self) -> Executor:
return self._executor
@property
def output_capture(self) -> Optional[Dict[StepOutputHandle, Any]]:
return self._output_capture
def for_step(self, step: ExecutionStep) -> "IStepContext":
return StepOrchestrationContext(
plan_data=self.plan_data,
log_manager=self._log_manager.with_tags(**step.logging_tags),
executor=self.executor,
step=step,
output_capture=self.output_capture,
)
@property
def resume_from_failure(self) -> bool:
return self._resume_from_failure
class StepOrchestrationContext(PlanOrchestrationContext, IStepContext):
"""Context for the orchestration of a step.
This context assumes inability to run user code directly. Thus, it does not include any resource
information.
"""
def __init__(
self,
plan_data: PlanData,
log_manager: DagsterLogManager,
executor: Executor,
step: ExecutionStep,
output_capture: Optional[Dict[StepOutputHandle, Any]],
):
super(StepOrchestrationContext, self).__init__(
plan_data, log_manager, executor, output_capture
)
self._step = step
@property
def step(self) -> ExecutionStep:
return self._step
@property
def node_handle(self) -> "NodeHandle":
return self.step.node_handle
class PlanExecutionContext(IPlanContext):
"""Context for the execution of a plan.
This context assumes that user code can be run directly, and thus includes resource and
information.
"""
def __init__(
self,
plan_data: PlanData,
execution_data: ExecutionData,
log_manager: DagsterLogManager,
output_capture: Optional[Dict[StepOutputHandle, Any]] = None,
):
self._plan_data = plan_data
self._execution_data = execution_data
self._log_manager = log_manager
self._output_capture = output_capture
@property
def plan_data(self) -> PlanData:
return self._plan_data
@property
def output_capture(self) -> Optional[Dict[StepOutputHandle, Any]]:
return self._output_capture
def for_step(
self,
step: ExecutionStep,
known_state: Optional["KnownExecutionState"] = None,
) -> IStepContext:
return StepExecutionContext(
plan_data=self.plan_data,
execution_data=self._execution_data,
log_manager=self._log_manager.with_tags(**step.logging_tags),
step=step,
output_capture=self.output_capture,
known_state=known_state,
)
@property
def pipeline_def(self) -> PipelineDefinition:
return self._execution_data.pipeline_def
@property
def resolved_run_config(self) -> ResolvedRunConfig:
return self._execution_data.resolved_run_config
@property
def scoped_resources_builder(self) -> ScopedResourcesBuilder:
return self._execution_data.scoped_resources_builder
@property
def log(self) -> DagsterLogManager:
return self._log_manager
@property
def partitions_def(self) -> Optional[PartitionsDefinition]:
from dagster._core.definitions.job_definition import JobDefinition
pipeline_def = self._execution_data.pipeline_def
if not isinstance(pipeline_def, JobDefinition):
check.failed(
"Can only call 'partitions_def', when using jobs, not legacy pipelines",
)
partitions_def = pipeline_def.partitions_def
return partitions_def
@property
def has_partitions(self) -> bool:
tags = self._plan_data.dagster_run.tags
return bool(
PARTITION_NAME_TAG in tags
or any([tag.startswith(MULTIDIMENSIONAL_PARTITION_PREFIX) for tag in tags.keys()])
or (
tags.get(ASSET_PARTITION_RANGE_START_TAG)
and tags.get(ASSET_PARTITION_RANGE_END_TAG)
)
)
@property
def partition_key(self) -> str:
from dagster._core.definitions.multi_dimensional_partitions import (
MultiPartitionsDefinition,
get_multipartition_key_from_tags,
)
if not self.has_partitions:
raise DagsterInvariantViolationError(
"Cannot access partition_key for a non-partitioned run"
)
tags = self._plan_data.dagster_run.tags
if any([tag.startswith(MULTIDIMENSIONAL_PARTITION_PREFIX) for tag in tags.keys()]):
return get_multipartition_key_from_tags(tags)
elif PARTITION_NAME_TAG in tags:
return tags[PARTITION_NAME_TAG]
else:
range_start = tags[ASSET_PARTITION_RANGE_START_TAG]
range_end = tags[ASSET_PARTITION_RANGE_END_TAG]
if range_start != range_end:
raise DagsterInvariantViolationError(
"Cannot access partition_key for a partitioned run with a range of partitions."
" Call asset_partition_key_range instead."
)
else:
if isinstance(self.partitions_def, MultiPartitionsDefinition):
return self.partitions_def.get_partition_key_from_str(cast(str, range_start))
return cast(str, range_start)
@property
def asset_partition_key_range(self) -> PartitionKeyRange:
from dagster._core.definitions.multi_dimensional_partitions import (
MultiPartitionsDefinition,
get_multipartition_key_from_tags,
)
if not self.has_partitions:
raise DagsterInvariantViolationError(
"Cannot access partition_key for a non-partitioned run"
)
tags = self._plan_data.dagster_run.tags
if any([tag.startswith(MULTIDIMENSIONAL_PARTITION_PREFIX) for tag in tags.keys()]):
multipartition_key = get_multipartition_key_from_tags(tags)
return PartitionKeyRange(multipartition_key, multipartition_key)
elif PARTITION_NAME_TAG in tags:
partition_key = tags[PARTITION_NAME_TAG]
return PartitionKeyRange(partition_key, partition_key)
else:
partition_key_range_start = tags[ASSET_PARTITION_RANGE_START_TAG]
if partition_key_range_start is not None:
if isinstance(self.partitions_def, MultiPartitionsDefinition):
return PartitionKeyRange(
self.partitions_def.get_partition_key_from_str(partition_key_range_start),
self.partitions_def.get_partition_key_from_str(
tags[ASSET_PARTITION_RANGE_END_TAG]
),
)
return PartitionKeyRange(partition_key_range_start, tags[ASSET_PARTITION_RANGE_END_TAG])
@property
def partition_time_window(self) -> TimeWindow:
partitions_def = self.partitions_def
if not isinstance(partitions_def, TimeWindowPartitionsDefinition):
check.failed(
(
"Expected a TimeWindowPartitionsDefinition, but instead found"
f" {type(partitions_def)}"
),
)
return partitions_def.time_window_for_partition_key(self.partition_key)
@property
def has_partition_key(self) -> bool:
return PARTITION_NAME_TAG in self._plan_data.dagster_run.tags
@property
def has_partition_key_range(self) -> bool:
return ASSET_PARTITION_RANGE_START_TAG in self._plan_data.dagster_run.tags
def for_type(self, dagster_type: DagsterType) -> "TypeCheckContext":
return TypeCheckContext(
self.run_id, self.log, self._execution_data.scoped_resources_builder, dagster_type
)
[docs]class StepExecutionContext(PlanExecutionContext, IStepContext):
"""Context for the execution of a step. Users should not instantiate this class directly.
This context assumes that user code can be run directly, and thus includes resource and information.
"""
def __init__(
self,
plan_data: PlanData,
execution_data: ExecutionData,
log_manager: DagsterLogManager,
step: ExecutionStep,
output_capture: Optional[Dict[StepOutputHandle, Any]],
known_state: Optional["KnownExecutionState"],
):
from dagster._core.execution.resources_init import get_required_resource_keys_for_step
super(StepExecutionContext, self).__init__(
plan_data=plan_data,
execution_data=execution_data,
log_manager=log_manager,
output_capture=output_capture,
)
self._step = step
self._required_resource_keys = get_required_resource_keys_for_step(
plan_data.pipeline.get_definition(),
step,
plan_data.execution_plan,
)
self._resources = execution_data.scoped_resources_builder.build(
self._required_resource_keys
)
self._known_state = known_state
self._input_lineage: List[AssetLineageInfo] = []
resources_iter = cast(Iterable, self._resources)
step_launcher_resources = [
resource for resource in resources_iter if isinstance(resource, StepLauncher)
]
self._step_launcher: Optional[StepLauncher] = None
if len(step_launcher_resources) > 1:
raise DagsterInvariantViolationError(
"Multiple required resources for {described_op} have inherited StepLauncher"
"There should be at most one step launcher resource per {node_type}.".format(
described_op=self.describe_op(), node_type=self.op_def.node_type_str
)
)
elif len(step_launcher_resources) == 1:
self._step_launcher = step_launcher_resources[0]
self._step_exception: Optional[BaseException] = None
self._step_output_capture: Optional[Dict[StepOutputHandle, Any]] = None
# Enable step output capture if there are any hooks which will receive them.
# Expect in the future that hooks may control whether or not they get outputs,
# but for now presence of any will cause output capture.
if self.pipeline_def.get_all_hooks_for_handle(self.node_handle):
self._step_output_capture = {}
self._output_metadata: Dict[str, Any] = {}
self._seen_outputs: Dict[str, Union[str, Set[str]]] = {}
self._input_asset_records: Dict[AssetKey, Optional["EventLogRecord"]] = {}
self._is_external_input_asset_records_loaded = False
self._data_version_cache: Dict[AssetKey, "DataVersion"] = {}
@property
def step(self) -> ExecutionStep:
return self._step
@property
def node_handle(self) -> "NodeHandle":
return self.step.node_handle
@property
def required_resource_keys(self) -> AbstractSet[str]:
return self._required_resource_keys
@property
def resources(self) -> "Resources":
return self._resources
@property
def step_launcher(self) -> Optional[StepLauncher]:
return self._step_launcher
@property
def op_def(self) -> OpDefinition:
return self.solid.definition.ensure_op_def()
@property
def pipeline_def(self) -> PipelineDefinition:
return self._execution_data.pipeline_def
@property
def job_def(self) -> "JobDefinition":
check.invariant(
self._execution_data.pipeline_def.is_job,
"Attempted to call job_def property for a pipeline definition.",
)
return cast("JobDefinition", self._execution_data.pipeline_def)
@property
def mode_def(self) -> ModeDefinition:
return self._execution_data.mode_def
@property
def solid(self) -> "Node":
return self.pipeline_def.get_solid(self._step.node_handle)
@property
def solid_retry_policy(self) -> Optional[RetryPolicy]:
return self.pipeline_def.get_retry_policy_for_handle(self.node_handle)
def describe_op(self) -> str:
if isinstance(self.op_def, OpDefinition):
return f'op "{str(self.node_handle)}"'
return f'solid "{str(self.node_handle)}"'
def get_io_manager(self, step_output_handle: StepOutputHandle) -> IOManager:
step_output = self.execution_plan.get_step_output(step_output_handle)
io_manager_key = (
self.pipeline_def.get_solid(step_output.solid_handle)
.output_def_named(step_output.name)
.io_manager_key
)
output_manager = getattr(self.resources, io_manager_key)
return check.inst(output_manager, IOManager)
def get_output_context(self, step_output_handle: StepOutputHandle) -> OutputContext:
return get_output_context(
self.execution_plan,
self.pipeline_def,
self.resolved_run_config,
step_output_handle,
self._get_source_run_id(step_output_handle),
log_manager=self.log,
step_context=self,
resources=None,
version=self.execution_plan.get_version_for_step_output_handle(step_output_handle),
)
def for_input_manager(
self,
name: str,
config: Any,
metadata: Any,
dagster_type: DagsterType,
source_handle: Optional[StepOutputHandle] = None,
resource_config: Any = None,
resources: Optional["Resources"] = None,
artificial_output_context: Optional["OutputContext"] = None,
) -> InputContext:
if source_handle and artificial_output_context:
check.failed("Cannot specify both source_handle and artificial_output_context.")
upstream_output: Optional[OutputContext] = None
if source_handle is not None:
version = self.execution_plan.get_version_for_step_output_handle(source_handle)
# NOTE: this is using downstream step_context for upstream OutputContext. step_context
# will be set to None for 0.15 release.
upstream_output = get_output_context(
self.execution_plan,
self.pipeline_def,
self.resolved_run_config,
source_handle,
self._get_source_run_id(source_handle),
log_manager=self.log,
step_context=self,
resources=None,
version=version,
warn_on_step_context_use=True,
)
else:
upstream_output = artificial_output_context
asset_key = self.pipeline_def.asset_layer.asset_key_for_input(
node_handle=self.node_handle, input_name=name
)
asset_partitions_subset = (
self.asset_partitions_subset_for_input(name)
if self.has_asset_partitions_for_input(name)
else None
)
asset_partitions_def = (
self.pipeline_def.asset_layer.partitions_def_for_asset(asset_key) if asset_key else None
)
return InputContext(
job_name=self.pipeline_def.name,
name=name,
op_def=self.op_def,
config=config,
metadata=metadata,
upstream_output=upstream_output,
dagster_type=dagster_type,
log_manager=self.log,
step_context=self,
resource_config=resource_config,
resources=resources,
asset_key=asset_key,
asset_partitions_subset=asset_partitions_subset,
asset_partitions_def=asset_partitions_def,
instance=self.instance,
)
def for_hook(self, hook_def: HookDefinition) -> "HookContext":
from .hook import HookContext
return HookContext(self, hook_def)
def get_known_state(self) -> "KnownExecutionState":
if not self._known_state:
check.failed(
"Attempted to access KnownExecutionState but it was not provided at context"
" creation"
)
return self._known_state
def can_load(
self,
step_output_handle: StepOutputHandle,
) -> bool:
# can load from upstream in the same run
if step_output_handle in self.get_known_state().ready_outputs:
return True
if (
self._should_load_from_previous_runs(step_output_handle)
# should and can load from a previous run
and self._get_source_run_id_from_logs(step_output_handle)
):
return True
return False
def observe_output(self, output_name: str, mapping_key: Optional[str] = None) -> None:
if mapping_key:
if output_name not in self._seen_outputs:
self._seen_outputs[output_name] = set()
cast(Set[str], self._seen_outputs[output_name]).add(mapping_key)
else:
self._seen_outputs[output_name] = "seen"
def has_seen_output(self, output_name: str, mapping_key: Optional[str] = None) -> bool:
if mapping_key:
return (
output_name in self._seen_outputs and mapping_key in self._seen_outputs[output_name]
)
return output_name in self._seen_outputs
def add_output_metadata(
self,
metadata: Mapping[str, Any],
output_name: Optional[str] = None,
mapping_key: Optional[str] = None,
) -> None:
if output_name is None and len(self.op_def.output_defs) == 1:
output_def = self.op_def.output_defs[0]
output_name = output_def.name
elif output_name is None:
raise DagsterInvariantViolationError(
"Attempted to log metadata without providing output_name, but multiple outputs"
" exist. Please provide an output_name to the invocation of"
" `context.add_output_metadata`."
)
else:
output_def = self.op_def.output_def_named(output_name)
if self.has_seen_output(output_name, mapping_key):
output_desc = (
f"output '{output_def.name}'"
if not mapping_key
else f"output '{output_def.name}' with mapping_key '{mapping_key}'"
)
raise DagsterInvariantViolationError(
f"In {self.op_def.node_type_str} '{self.solid.name}', attempted to log output"
f" metadata for {output_desc} which has already been yielded. Metadata must be"
" logged before the output is yielded."
)
if output_def.is_dynamic and not mapping_key:
raise DagsterInvariantViolationError(
f"In {self.op_def.node_type_str} '{self.solid.name}', attempted to log metadata"
f" for dynamic output '{output_def.name}' without providing a mapping key. When"
" logging metadata for a dynamic output, it is necessary to provide a mapping key."
)
if output_name in self._output_metadata:
if not mapping_key or mapping_key in self._output_metadata[output_name]:
raise DagsterInvariantViolationError(
f"In {self.op_def.node_type_str} '{self.solid.name}', attempted to log"
f" metadata for output '{output_name}' more than once."
)
if mapping_key:
if output_name not in self._output_metadata:
self._output_metadata[output_name] = {}
self._output_metadata[output_name][mapping_key] = metadata
else:
self._output_metadata[output_name] = metadata
def get_output_metadata(
self, output_name: str, mapping_key: Optional[str] = None
) -> Optional[Mapping[str, Any]]:
metadata = self._output_metadata.get(output_name)
if mapping_key and metadata:
return metadata.get(mapping_key)
return metadata
def _get_source_run_id_from_logs(self, step_output_handle: StepOutputHandle) -> Optional[str]:
# walk through event logs to find the right run_id based on the run lineage
parent_state = self.get_known_state().parent_state
while parent_state:
# if the parent run has yielded an StepOutput event for the given step output,
# we find the source run id
if step_output_handle in parent_state.produced_outputs:
return parent_state.run_id
# else, keep looking backwards
parent_state = parent_state.get_parent_state()
# When a fixed path is provided via io manager, it's able to run step subset using an execution
# plan when the ascendant outputs were not previously created by dagster-controlled
# computations. for example, in backfills, with fixed path io manager, we allow users to
# "re-execute" runs with steps where the outputs weren't previously stored by dagster.
# Warn about this special case because it will also reach here when all previous runs have
# skipped yielding this output. From the logs, we have no easy way to differentiate the fixed
# path case and the skipping case, until we record the skipping info in KnownExecutionState,
# i.e. resolve https://github.com/dagster-io/dagster/issues/3511
self.log.warn(
f"No previously stored outputs found for source {step_output_handle}. "
"This is either because you are using an IO Manager that does not depend on run ID, "
"or because all the previous runs have skipped the output in conditional execution."
)
return None
def _should_load_from_previous_runs(self, step_output_handle: StepOutputHandle) -> bool:
# should not load if not a re-execution
if self.dagster_run.parent_run_id is None:
return False
# should not load if re-executing the entire pipeline
if self.dagster_run.step_keys_to_execute is None:
return False
# should not load if the entire dynamic step is being executed in the current run
handle = StepHandle.parse_from_key(step_output_handle.step_key)
if (
isinstance(handle, ResolvedFromDynamicStepHandle)
and handle.unresolved_form.to_key() in self.dagster_run.step_keys_to_execute
):
return False
# should not load if this step is being executed in the current run
return step_output_handle.step_key not in self.dagster_run.step_keys_to_execute
def _get_source_run_id(self, step_output_handle: StepOutputHandle) -> Optional[str]:
if self._should_load_from_previous_runs(step_output_handle):
return self._get_source_run_id_from_logs(step_output_handle)
else:
return self.dagster_run.run_id
def capture_step_exception(self, exception: BaseException):
self._step_exception = check.inst_param(exception, "exception", BaseException)
@property
def step_exception(self) -> Optional[BaseException]:
return self._step_exception
@property
def step_output_capture(self) -> Optional[Dict[StepOutputHandle, Any]]:
return self._step_output_capture
@property
def previous_attempt_count(self) -> int:
return self.get_known_state().get_retry_state().get_attempt_count(self._step.key)
@property
def op_config(self) -> Any:
op_config = self.resolved_run_config.ops.get(str(self.node_handle))
return op_config.config if op_config else None
@property
def step_materializes_assets(self) -> bool:
step_outputs = self.step.step_outputs
if len(step_outputs) == 0:
return False
else:
asset_info = self.pipeline_def.asset_layer.asset_info_for_output(
self.node_handle, step_outputs[0].name
)
return asset_info is not None
def set_data_version(self, asset_key: AssetKey, data_version: "DataVersion") -> None:
self._data_version_cache[asset_key] = data_version
def has_data_version(self, asset_key: AssetKey) -> bool:
return asset_key in self._data_version_cache
def get_data_version(self, asset_key: AssetKey) -> "DataVersion":
return self._data_version_cache[asset_key]
@property
def input_asset_records(self) -> Optional[Mapping[AssetKey, Optional["EventLogRecord"]]]:
return self._input_asset_records
@property
def is_external_input_asset_records_loaded(self) -> bool:
return self._is_external_input_asset_records_loaded
def get_input_asset_record(self, key: AssetKey) -> Optional["EventLogRecord"]:
if key not in self._input_asset_records:
self._fetch_input_asset_record(key)
return self._input_asset_records[key]
# "external" refers to records for inputs generated outside of this step
def fetch_external_input_asset_records(self) -> None:
output_keys: List[AssetKey] = []
for step_output in self.step.step_outputs:
asset_info = self.pipeline_def.asset_layer.asset_info_for_output(
self.node_handle, step_output.name
)
if asset_info is None or not asset_info.is_required:
continue
output_keys.append(asset_info.key)
all_dep_keys: List[AssetKey] = []
for output_key in output_keys:
if output_key not in self.pipeline_def.asset_layer._asset_deps: # noqa: SLF001
continue
dep_keys = self.pipeline_def.asset_layer.upstream_assets_for_asset(output_key)
for key in dep_keys:
if key not in all_dep_keys and key not in output_keys:
all_dep_keys.append(key)
self._input_asset_records = {}
for key in all_dep_keys:
self._fetch_input_asset_record(key)
self._is_external_input_asset_records_loaded = True
def _fetch_input_asset_record(self, key: AssetKey, retries: int = 0) -> None:
from dagster._core.definitions.data_version import (
extract_data_version_from_entry,
)
event = self.instance.get_latest_data_version_record(key)
if key in self._data_version_cache and retries <= 5:
event_data_version = (
None if event is None else extract_data_version_from_entry(event.event_log_entry)
)
if event_data_version == self._data_version_cache[key]:
self._input_asset_records[key] = event
else:
self._fetch_input_asset_record(key, retries + 1)
else:
self._input_asset_records[key] = event
# Call this to clear the cache for an input asset record. This is necessary when an old
# materialization for an asset was loaded during `fetch_external_input_asset_records` because an
# intrastep asset is not required, but then that asset is materialized during the step. If we
# don't clear the cache for this asset, then we won't use the most up-to-date asset record.
def wipe_input_asset_record(self, key: AssetKey) -> None:
if key in self._input_asset_records:
del self._input_asset_records[key]
def has_asset_partitions_for_input(self, input_name: str) -> bool:
asset_layer = self.pipeline_def.asset_layer
upstream_asset_key = asset_layer.asset_key_for_input(self.node_handle, input_name)
return (
upstream_asset_key is not None
and asset_layer.partitions_def_for_asset(upstream_asset_key) is not None
)
def asset_partition_key_range_for_input(self, input_name: str) -> PartitionKeyRange:
subset = self.asset_partitions_subset_for_input(input_name)
partition_key_ranges = subset.get_partition_key_ranges(
dynamic_partitions_store=self.instance
)
if len(partition_key_ranges) != 1:
check.failed(
(
"Tried to access asset partition key range, but there are "
f"({len(partition_key_ranges)}) key ranges associated with this input."
),
)
return partition_key_ranges[0]
def asset_partitions_subset_for_input(self, input_name: str) -> PartitionsSubset:
asset_layer = self.pipeline_def.asset_layer
assets_def = asset_layer.assets_def_for_node(self.node_handle)
upstream_asset_key = asset_layer.asset_key_for_input(self.node_handle, input_name)
if upstream_asset_key is not None:
upstream_asset_partitions_def = asset_layer.partitions_def_for_asset(upstream_asset_key)
if upstream_asset_partitions_def is not None:
partitions_def = assets_def.partitions_def if assets_def else None
partitions_subset = (
partitions_def.empty_subset().with_partition_key_range(
self.asset_partition_key_range, dynamic_partitions_store=self.instance
)
if partitions_def
else None
)
partition_mapping = infer_partition_mapping(
asset_layer.partition_mapping_for_node_input(
self.node_handle, upstream_asset_key
),
partitions_def,
upstream_asset_partitions_def,
)
return partition_mapping.get_upstream_partitions_for_partitions(
partitions_subset,
upstream_asset_partitions_def,
dynamic_partitions_store=self.instance,
)
check.failed("The input has no asset partitions")
def asset_partition_key_for_input(self, input_name: str) -> str:
start, end = self.asset_partition_key_range_for_input(input_name)
if start == end:
return start
else:
check.failed(
f"Tried to access partition key for input '{input_name}' of step '{self.step.key}',"
f" but the step input has a partition range: '{start}' to '{end}'."
)
def _partitions_def_for_output(self, output_name: str) -> Optional[PartitionsDefinition]:
asset_info = self.pipeline_def.asset_layer.asset_info_for_output(
node_handle=self.node_handle, output_name=output_name
)
if asset_info:
return asset_info.partitions_def
else:
return None
def has_asset_partitions_for_output(self, output_name: str) -> bool:
return self._partitions_def_for_output(output_name) is not None
def asset_partition_key_range_for_output(self, output_name: str) -> PartitionKeyRange:
if self._partitions_def_for_output(output_name) is not None:
return self.asset_partition_key_range
check.failed("The output has no asset partitions")
def asset_partition_key_for_output(self, output_name: str) -> str:
start, end = self.asset_partition_key_range_for_output(output_name)
if start == end:
return start
else:
check.failed(
f"Tried to access partition key for output '{output_name}' of step"
f" '{self.step.key}', but the step output has a partition range: '{start}' to"
f" '{end}'."
)
def asset_partitions_time_window_for_output(self, output_name: str) -> TimeWindow:
"""The time window for the partitions of the asset correponding to the given output.
Raises an error if either of the following are true:
- The output asset has no partitioning.
- The output asset is not partitioned with a TimeWindowPartitionsDefinition.
"""
partitions_def = self._partitions_def_for_output(output_name)
if not partitions_def:
raise ValueError(
"Tried to get asset partitions for an output that does not correspond to a "
"partitioned asset."
)
if not isinstance(partitions_def, TimeWindowPartitionsDefinition):
raise ValueError(
"Tried to get asset partitions for an output that correponds to a partitioned "
"asset that is not partitioned with a TimeWindowPartitionsDefinition."
)
partition_key_range = self.asset_partition_key_range_for_output(output_name)
return TimeWindow(
# mypy thinks partitions_def is <nothing> here because ????
partitions_def.time_window_for_partition_key(partition_key_range.start).start,
partitions_def.time_window_for_partition_key(partition_key_range.end).end,
)
def get_type_loader_context(self) -> "DagsterTypeLoaderContext":
return DagsterTypeLoaderContext(
plan_data=self.plan_data,
execution_data=self._execution_data,
log_manager=self._log_manager,
step=self.step,
output_capture=self._output_capture,
known_state=self._known_state,
)
[docs]class TypeCheckContext:
"""The ``context`` object available to a type check function on a DagsterType.
Attributes:
log (DagsterLogManager): Centralized log dispatch from user code.
resources (Any): An object whose attributes contain the resources available to this op.
run_id (str): The id of this job run.
"""
def __init__(
self,
run_id: str,
log_manager: DagsterLogManager,
scoped_resources_builder: ScopedResourcesBuilder,
dagster_type: DagsterType,
):
self._run_id = run_id
self._log = log_manager
self._resources = scoped_resources_builder.build(dagster_type.required_resource_keys)
@public
@property
def resources(self) -> "Resources":
return self._resources
@public
@property
def run_id(self) -> str:
return self._run_id
@public
@property
def log(self) -> DagsterLogManager:
return self._log
[docs]class DagsterTypeLoaderContext(StepExecutionContext):
"""The context object provided to a :py:class:`@dagster_type_loader <dagster_type_loader>`-decorated function during execution.
Users should not construct this object directly.
"""
@public
@property
def resources(self) -> "Resources":
"""The resources available to the type loader, specified by the `required_resource_keys` argument of the decorator.
"""
return super(DagsterTypeLoaderContext, self).resources
@public
@property
def job_def(self) -> "JobDefinition":
"""The underlying job definition being executed."""
return super(DagsterTypeLoaderContext, self).job_def
@public
@property
def op_def(self) -> "OpDefinition":
"""The op for which type loading is occurring."""
return super(DagsterTypeLoaderContext, self).op_def