[#4504] Use mashumaro for logging serialization

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Reimplement log message to use adapter name instead of the object method. ([#4501](https://github.com/dbt-labs/dbt-core/pull/4501))
 - Issue better error message for incompatible schemas ([#4470](https://github.com/dbt-labs/dbt-core/pull/4442), [#4497](https://github.com/dbt-labs/dbt-core/pull/4497))
 - Remove secrets from error related to packages. ([#4507](https://github.com/dbt-labs/dbt-core/pull/4507))
+- Some structured logging serialization cleanup ([#4504](https://github.com/dbt-labs/dbt-core/issues/4504), [#4505](https://github.com/dbt-labs/dbt-core/pull/4505))
 
 ###  Docs
 - Fix missing data on exposures in docs ([#4467](https://github.com/dbt-labs/dbt-core/issues/4467))

core/dbt/adapters/cache.py

@@ -291,20 +291,19 @@ def add_link(self, referenced, dependent):
         :raises InternalError: If either entry does not exist.
         """
         ref_key = _make_key(referenced)
+        dep_key = _make_key(dependent)
         if (ref_key.database, ref_key.schema) not in self:
             # if we have not cached the referenced schema at all, we must be
             # referring to a table outside our control. There's no need to make
             # a link - we will never drop the referenced relation during a run.
-            fire_event(UncachedRelation(dep_key=dependent, ref_key=ref_key))
+            fire_event(UncachedRelation(dep_key=dep_key, ref_key=ref_key))
             return
         if ref_key not in self.relations:
             # Insert a dummy "external" relation.
             referenced = referenced.replace(
                 type=referenced.External
             )
             self.add(referenced)
-
-        dep_key = _make_key(dependent)
         if dep_key not in self.relations:
             # Insert a dummy "external" relation.
             dependent = dependent.replace(

core/dbt/adapters/factory.py

@@ -66,7 +66,7 @@ def load_plugin(self, name: str) -> Type[Credentials]:
             # if we failed to import the target module in particular, inform
             # the user about it via a runtime error
             if exc.name == 'dbt.adapters.' + name:
-                fire_event(AdapterImportError(exc=exc))
+                fire_event(AdapterImportError(exc=str(exc)))
                 raise RuntimeException(f'Could not find adapter type {name}!')
             # otherwise, the error had to have come from some underlying
             # library. Log the stack trace.

core/dbt/context/base.py

@@ -488,9 +488,9 @@ def log(msg: str, info: bool = False) -> str:
             {% endmacro %}"
         """
         if info:
-            fire_event(MacroEventInfo(msg))
+            fire_event(MacroEventInfo(msg=msg))
         else:
-            fire_event(MacroEventDebug(msg))
+            fire_event(MacroEventDebug(msg=msg))
         return ''
 
     @contextproperty

core/dbt/contracts/graph/parsed.py

@@ -211,6 +211,20 @@ def write_node(self, target_path: str, subdirectory: str, payload: str):
         write_file(full_path, payload)
         return full_path
 
+    @property
+    def node_info(self):
+        node_info = {
+            "node_path": self.path,
+            "node_name": self.name,
+            "unique_id": self.unique_id,
+            "resource_type": self.resource_type.value,
+            "materialized": self.config.get('materialized'),
+            "node_status": str(self._event_status.get('node_status')),
+            "node_started_at": self._event_status.get("started_at"),
+            "node_finished_at": self._event_status.get("finished_at")
+        }
+        return node_info
+
 
 T = TypeVar('T', bound='ParsedNode')
 
@@ -738,6 +752,19 @@ def has_freshness(self):
     def search_name(self):
         return f'{self.source_name}.{self.name}'
 
+    @property
+    def node_info(self):
+        node_info = {
+            "node_path": self.path,
+            "node_name": self.name,
+            "unique_id": self.unique_id,
+            "resource_type": self.resource_type.value,
+            "node_status": str(self._event_status.get('node_status')),
+            "node_started_at": self._event_status.get("started_at"),
+            "node_finished_at": self._event_status.get("finished_at")
+        }
+        return node_info
+
 
 @dataclass
 class ParsedExposure(UnparsedBaseNode, HasUniqueID, HasFqn):

core/dbt/events/README.md

@@ -29,28 +29,10 @@ class PartialParsingDeletedExposure(DebugLevel, Cli, File):
 
 ## Optional (based on your event)
 
-- Events associated with node status changes must have `report_node_data` passed in and be extended with `NodeInfo`
-- define `asdict` if your data is not serializable to json
+- Events associated with node status changes must be extended with `NodeInfo` which contains a node_info attribute
 
-Example
-```
-@dataclass
-class SuperImportantNodeEvent(InfoLevel, File, NodeInfo):
-    node_name: str
-    run_result: RunResult
-    report_node_data: ParsedModelNode  # may vary
-    code: str = "Q036"
-
-    def message(self) -> str:
-        return f"{self.node_name} had overly verbose result of {run_result}"
-
-    @classmethod
-    def asdict(cls, data: list) -> dict:
-        return dict((k, str(v)) for k, v in data)
-
-```
 
-All values other than `code` and `report_node_data` will be included in the `data` node of the json log output.
+All values other than `code` and `node_info` will be included in the `data` node of the json log output.
 
 Once your event has been added, add a dummy call to your new event at the bottom of `types.py` and also add your new Event to the list `sample_values` in `test/unit/test_events.py'.
 

core/dbt/events/base_types.py

@@ -1,9 +1,10 @@
-from abc import ABCMeta, abstractmethod, abstractproperty
-from dataclasses import dataclass
+from abc import ABCMeta
+from dataclasses import dataclass, field
+from dbt.events.serialization import dbtClassEventMixin
 from datetime import datetime
 import os
 import threading
-from typing import Any, Optional
+from typing import Any, Optional, Dict
 
 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
 # These base types define the _required structure_ for the concrete event #
@@ -16,19 +17,6 @@ class Cache():
     pass
 
 
-@dataclass
-class Node():
-    node_path: str
-    node_name: str
-    unique_id: str
-    resource_type: str
-    materialized: str
-    node_status: str
-    node_started_at: datetime
-    node_finished_at: Optional[datetime]
-    type: str = 'node_status'
-
-
 @dataclass
 class ShowException():
     # N.B.:
@@ -42,31 +30,28 @@ def __post_init__(self):
 
 
 # TODO add exhaustiveness checking for subclasses
-# can't use ABCs with @dataclass because of https://github.com/python/mypy/issues/5374
 # top-level superclass for all events
-class Event(metaclass=ABCMeta):
+@dataclass
+class Event(dbtClassEventMixin, metaclass=ABCMeta):
     # fields that should be on all events with their default implementations
     log_version: int = 1
     ts: Optional[datetime] = None  # use getter for non-optional
     ts_rfc3339: Optional[str] = None  # use getter for non-optional
     pid: Optional[int] = None  # use getter for non-optional
-    node_info: Optional[Node]
 
     # four digit string code that uniquely identifies this type of event
     # uniqueness and valid characters are enforced by tests
-    @abstractproperty
+    @property
     @staticmethod
     def code() -> str:
         raise Exception("code() not implemented for event")
 
     # do not define this yourself. inherit it from one of the above level types.
-    @abstractmethod
     def level_tag(self) -> str:
         raise Exception("level_tag not implemented for Event")
 
     # Solely the human readable message. Timestamps and formatting will be added by the logger.
     # Must override yourself
-    @abstractmethod
     def message(self) -> str:
         raise Exception("msg not implemented for Event")
 
@@ -99,21 +84,6 @@ def get_invocation_id(cls) -> str:
         from dbt.events.functions import get_invocation_id
         return get_invocation_id()
 
-    # default dict factory for all events. can override on concrete classes.
-    @classmethod
-    def asdict(cls, data: list) -> dict:
-        d = dict()
-        for k, v in data:
-            # stringify all exceptions
-            if isinstance(v, Exception) or isinstance(v, BaseException):
-                d[k] = str(v)
-            # skip all binary data
-            elif isinstance(v, bytes):
-                continue
-            else:
-                d[k] = v
-        return d
-
 
 # in preparation for #3977
 class TestLevel(Event):
@@ -141,24 +111,6 @@ def level_tag(self) -> str:
         return "error"
 
 
-@dataclass  # type: ignore
-class NodeInfo(Event, metaclass=ABCMeta):
-    report_node_data: Any  # Union[ParsedModelNode, ...] TODO: resolve circular imports
-
-    def get_node_info(self):
-        node_info = Node(
-            node_path=self.report_node_data.path,
-            node_name=self.report_node_data.name,
-            unique_id=self.report_node_data.unique_id,
-            resource_type=self.report_node_data.resource_type.value,
-            materialized=self.report_node_data.config.get('materialized'),
-            node_status=str(self.report_node_data._event_status.get('node_status')),
-            node_started_at=self.report_node_data._event_status.get("started_at"),
-            node_finished_at=self.report_node_data._event_status.get("finished_at")
-        )
-        return node_info
-
-
 # prevents an event from going to the file
 class NoFile():
     pass
@@ -167,3 +119,8 @@ class NoFile():
 # prevents an event from going to stdout
 class NoStdOut():
     pass
+
+
+@dataclass
+class NodeInfo():
+    node_info: Dict[str, Any] = field(default_factory=dict)

core/dbt/events/functions.py

@@ -19,7 +19,6 @@
 import uuid
 import threading
 from typing import Any, Callable, Dict, List, Optional, Union
-import dataclasses
 from collections import deque
 
 
@@ -138,25 +137,21 @@ def event_to_serializable_dict(
     ts_fn: Callable[[datetime], str]
 ) -> Dict[str, Any]:
     data = dict()
-    node_info = dict()
+    node_info: Dict[str, Any] = dict()
     log_line = dict()
     try:
-        log_line = dataclasses.asdict(e, dict_factory=type(e).asdict)
-    except AttributeError:
+        log_line = e.to_dict()
+    except AttributeError as exc:
         event_type = type(e).__name__
         raise Exception(  # TODO this may hang async threads
-            f"type {event_type} is not serializable to json."
-            f" First make sure that the call sites for {event_type} match the type hints"
-            f" and if they do, you can override the dataclass method `asdict` in {event_type} in"
-            " types.py to define your own serialization function to a dictionary of valid json"
-            " types"
+            f"type {event_type} is not serializable. {str(exc)}"
         )
 
     if isinstance(e, NodeInfo):
-        node_info = dataclasses.asdict(e.get_node_info())
+        node_info = e.node_info
 
     for field, value in log_line.items():  # type: ignore[attr-defined]
-        if field not in ["code", "report_node_data"]:
+        if field not in ["code", "node_info", "log_version", "ts", "ts_rfc3339", "pid"]:
             data[field] = value
 
     event_dict = {
@@ -315,7 +310,7 @@ def fire_event(e: Event) -> None:
     global EVENT_HISTORY
     if len(EVENT_HISTORY) == (flags.EVENT_BUFFER_SIZE - 1):
         EVENT_HISTORY.append(e)
-        fire_event(EventBufferFull())
+        EVENT_HISTORY.append(EventBufferFull())
     else:
         EVENT_HISTORY.append(e)
 

core/dbt/events/serialization.py

@@ -0,0 +1,40 @@
+from mashumaro import DataClassDictMixin
+from mashumaro.config import (
+    BaseConfig as MashBaseConfig
+)
+from mashumaro.types import SerializationStrategy
+from datetime import datetime
+from dateutil.parser import parse
+from typing import cast
+
+
+class ExceptionSerialization(SerializationStrategy):
+    def serialize(self, value):
+        out = str(value)
+        return out
+
+    def deserialize(self, value):
+        return (Exception(value))
+
+
+class DateTimeSerialization(SerializationStrategy):
+    def serialize(self, value):
+        out = value.isoformat()
+        # Assume UTC if timezone is missing
+        if value.tzinfo is None:
+            out += "Z"
+        return out
+
+    def deserialize(self, value):
+        return (
+            value if isinstance(value, datetime) else parse(cast(str, value))
+        )
+
+
+class dbtClassEventMixin(DataClassDictMixin):
+
+    class Config(MashBaseConfig):
+        serialization_strategy = {
+            Exception: ExceptionSerialization(),
+            datetime: DateTimeSerialization(),
+        }