Coverage for python/pyairflowtester/analyzer.py: 56%
27 statements
« prev ^ index » next coverage.py v7.16.1, created at 2026-09-19 20:43 +0530
1"""
2Analyzer module for runtime analysis.
4INTENTIONALLY UNIMPLEMENTED. This subsystem is meant to connect to live
5Airflow instances and dbt systems to analyze execution patterns, failures,
6and correlations. Building real runtime correlation isn't achievable
7without an actual live Airflow/dbt instance to develop and test against,
8so every method below raises AnalyzerNotImplementedError rather than
9silently returning an empty list/dict that could be mistaken for "analyzed,
10found nothing." See README for status.
11"""
13import logging
14from typing import Any, Dict, List, Optional
16logger = logging.getLogger(__name__)
19class AnalyzerNotImplementedError(NotImplementedError):
20 """Raised by Analyzer methods: runtime correlation is not yet built.
22 The Analyzer subsystem requires a live Airflow metadata database (and,
23 for dbt methods, a live dbt run history) to implement and validate
24 against. That is planned future work, not something safe to fake with
25 stub logic. Use the static `Scanner` (via `pyairflowtester scan`) for
26 the analysis that is actually implemented today.
27 """
29 def __init__(self, method_name: str):
30 super().__init__(
31 f"Analyzer.{method_name}() is not implemented. Runtime "
32 "correlation against live Airflow/dbt instances is a planned "
33 "feature, not yet built. Use `pyairflowtester scan` (static "
34 "analysis) for functionality that exists today."
35 )
38class Analyzer:
39 """Runtime analyzer for production pipelines. NOT YET IMPLEMENTED.
41 Every method on this class raises AnalyzerNotImplementedError. This
42 class is a placeholder for a future feature: correlating rule findings
43 against real DAG-run/task-instance history from a live Airflow metadata
44 database and real dbt test-run history. That requires a live
45 Airflow/dbt instance to build and validate against.
46 """
48 def __init__(self, airflow_home: Optional[str] = None, airflow_db: Optional[str] = None):
49 """
50 Initialize analyzer.
52 Args:
53 airflow_home: Airflow home directory
54 airflow_db: Airflow database connection string
55 """
56 self.airflow_home = airflow_home
57 self.airflow_db = airflow_db
58 self.db_connection = None
60 def connect(self) -> bool:
61 """
62 Connect to Airflow metadata database.
64 Raises:
65 AnalyzerNotImplementedError: always; not yet implemented.
66 """
67 raise AnalyzerNotImplementedError("connect")
69 def analyze_dag_failures(self, dag_id: str) -> List[Dict[str, Any]]:
70 """
71 Analyze failure patterns for a DAG.
73 Raises:
74 AnalyzerNotImplementedError: always; not yet implemented.
75 """
76 raise AnalyzerNotImplementedError("analyze_dag_failures")
78 def analyze_task_failures(self, dag_id: str, task_id: str) -> List[Dict[str, Any]]:
79 """
80 Analyze failure patterns for a task.
82 Raises:
83 AnalyzerNotImplementedError: always; not yet implemented.
84 """
85 raise AnalyzerNotImplementedError("analyze_task_failures")
87 def detect_hotspots(self) -> List[Dict[str, Any]]:
88 """
89 Detect task hotspots (frequently failing tasks).
91 Raises:
92 AnalyzerNotImplementedError: always; not yet implemented.
93 """
94 raise AnalyzerNotImplementedError("detect_hotspots")
96 def analyze_cascade_failures(self) -> List[Dict[str, Any]]:
97 """
98 Analyze cascading failure patterns.
100 Raises:
101 AnalyzerNotImplementedError: always; not yet implemented.
102 """
103 raise AnalyzerNotImplementedError("analyze_cascade_failures")
105 def get_dbt_test_failures(self) -> List[Dict[str, Any]]:
106 """
107 Get dbt test failure history.
109 Raises:
110 AnalyzerNotImplementedError: always; not yet implemented.
111 """
112 raise AnalyzerNotImplementedError("get_dbt_test_failures")
114 def detect_flaky_tests(self) -> List[Dict[str, Any]]:
115 """
116 Detect flaky dbt tests.
118 Raises:
119 AnalyzerNotImplementedError: always; not yet implemented.
120 """
121 raise AnalyzerNotImplementedError("detect_flaky_tests")
123 def calculate_blast_radius(self, source: str, source_type: str = "dag") -> Dict[str, Any]:
124 """
125 Calculate blast radius for a failure source.
127 Raises:
128 AnalyzerNotImplementedError: always; not yet implemented.
129 """
130 raise AnalyzerNotImplementedError("calculate_blast_radius")