class_docstr: Translate Airflow metadata to OpenLineage events instead of creating them from Airflow code.
class_docstr_tok: ["Translate","Airflow","metadata","to","OpenLineage","events","instead","of","creating","them","from","Airflow","code","."]
code: def dag_failed(self, dag_run: DagRun, msg: str):
      event = RunEvent(
          eventType=RunState.FAIL,
          eventTime=dag_run.end_date.isoformat(),
          job=Job(name=dag_run.dag_id, namespace=_DAG_NAMESPACE),
          run=Run(
              runId=self.build_dag_run_id(
                  dag_run.dag_id, dag_run.run_id
              ),
              facets={
                  "errorMessage": ErrorMessageRunFacet(
                      message=msg, programmingLanguage="python"
                  )
              },
          ),
          inputs=[],
          outputs=[],
          producer=_PRODUCER,
      )
      self.emit(event)
  
imports: from __future__ import annotations
  import os
  import uuid
  from typing import TYPE_CHECKING
  import yaml
  from openlineage.client import OpenLineageClient, set_producer
  from openlineage.client.facet import BaseFacet, DocumentationJobFacet, ErrorMessageRunFacet, NominalTimeRunFacet, OwnershipJobFacet, OwnershipJobFacetOwners, ParentRunFacet, ProcessingEngineRunFacet, SourceCodeLocationJobFacet
  from openlineage.client.run import Job, Run, RunEvent, RunState
  from airflow.configuration import conf
  from airflow.providers.openlineage import __version__
  from airflow.providers.openlineage.utils.utils import OpenLineageRedactor
  from airflow.stats import Stats
  from airflow.utils.log.logging_mixin import LoggingMixin
label_desc: Use image node_id 13 for calling the OpenLineageAdapter obj's underlying member method code with example usage: obj.dag_failed(dag_run, msg) without return types