SKL Retrieve log file (XCom) when Task job finishes or fails

launch_scripts/launch_airflow.py

@@ -16,7 +16,7 @@
 import logging
 import argparse
 import time
-from typing import Dict, Union, List
+from typing import Dict, Union, List, Optional, Any
 
 import requests
 from requests.auth import HTTPBasicAuth
@@ -72,8 +72,8 @@ def _retrieve_pw(instance: str = "prod") -> str:
         "health": "api/v1/health",
         "run_dag": f"api/v1/dags/lute_{args.workflow}/dagRuns",
         "get_tasks": f"api/v1/dags/lute_{args.workflow}/tasks",
-        "get_xcom": (
-            f"api/v1/dags/lute_{args.workflow}/{{dag_run_id}}/taskInstances"
+        "get_xcom": (  # Need to format dag_run_id, task_id, xcom_key
+            f"api/v1/dags/lute_{args.workflow}/dagRuns/{{dag_run_id}}/taskInstances"
             f"/{{task_id}}/xcomEntries/{{xcom_key}}"
         ),
     }
@@ -137,15 +137,40 @@ def _retrieve_pw(instance: str = "prod") -> str:
     xcom_key: str = "log"
     while True:
         time.sleep(1)
+        # DAG Status
         resp = requests.get(url, auth=auth)
         resp.raise_for_status()
         state = resp.json()["state"]
+        # Check Task instances
+        task_url: str = f"{url}/taskInstances"
+        resp = requests.get(task_url, auth=auth)
+        resp.raise_for_status()
+        instance_information: Dict[str, Any] = resp.json()["task_instances"]
+        for inst in instance_information:
+            task_id: str = inst["task_id"]
+            task_state: Optional[str]
+            if task_state := inst["state"]:
+                logger.info(f"{task_id} state: {task_state}")
+                if task_state in ("success", "failed"):
+                    # Only pushed to XCOM at the end of each Task
+                    xcom_url: str = (
+                        f"{airflow_instance}/{airflow_api_endpoints['get_xcom']}"
+                    )
+                    xcom_url = xcom_url.format(
+                        dag_run_id=dag_run_id,
+                        task_id=task_id,
+                        xcom_key=xcom_key,
+                    )
+                    resp = requests.get(xcom_url, auth=auth)
+                    resp.raise_for_status()
+                    logs: str = resp.json()["value"]  # Only want to print once.
+
         if state in ("queued", "running"):
             continue
         logger.info(f"DAG is {state}")
         break
 
     if state == "failed":
-        sys.exit(-1)
+        sys.exit(1)
     else:
         sys.exit(0)