refactor: use SchemaVersionManager to handle version logic

karapace/schema_models.py

@@ -24,7 +24,7 @@
 from karapace.schema_references import Reference
 from karapace.schema_type import SchemaType
 from karapace.typing import JsonObject, ResolvedVersion, SchemaId, Subject, Version
-from karapace.utils import assert_never, catch_and_raise_error, json_decode, json_encode, JSONDecodeError
+from karapace.utils import assert_never, intstr_conversion_guard, json_decode, json_encode, JSONDecodeError
 from typing import Any, cast, Dict, Final, final, Mapping, Sequence
 
 import hashlib
@@ -395,11 +395,11 @@ class SchemaVersionManager:
     MINUS_1_SCHEMA_VERSION_TAG: Final = "-1"
 
     @classmethod
-    def latest_schema_tag_condition(cls, version: Version):
+    def latest_schema_tag_condition(cls, version: Version) -> bool:
         return (str(version) == cls.LATEST_SCHEMA_VERSION_TAG) or (str(version) == cls.MINUS_1_SCHEMA_VERSION_TAG)
 
     @classmethod
-    @catch_and_raise_error(to_catch=(ValueError,), to_raise=VersionNotFoundException)
+    @intstr_conversion_guard(to_raise=VersionNotFoundException())
     def resolve_version(
         cls,
         schema_versions: Mapping[ResolvedVersion, SchemaVersion],
@@ -409,11 +409,11 @@ def resolve_version(
         if cls.latest_schema_tag_condition(version):
             return max_version
         if (int(version) <= max_version) and (int(version) >= int(cls.MINUS_1_SCHEMA_VERSION_TAG)):
-            return ResolvedVersion(version)
+            return ResolvedVersion(int(version))
         return None
 
     @classmethod
-    @catch_and_raise_error(to_catch=(ValueError,), to_raise=InvalidVersion)
+    @intstr_conversion_guard(to_raise=InvalidVersion())
     def validate_version(cls, version: Version) -> Version | str | None:
         if cls.latest_schema_tag_condition(version):
             return cls.LATEST_SCHEMA_VERSION_TAG

karapace/schema_registry.py

@@ -11,7 +11,6 @@
 from karapace.dependency import Dependency
 from karapace.errors import (
     IncompatibleSchema,
-    InvalidVersion,
     ReferenceExistsException,
     SchemasNotFoundException,
     SchemaVersionNotSoftDeletedException,
@@ -26,43 +25,25 @@
 from karapace.master_coordinator import MasterCoordinator
 from karapace.messaging import KarapaceProducer
 from karapace.offset_watcher import OffsetWatcher
-from karapace.schema_models import ParsedTypedSchema, SchemaType, SchemaVersion, TypedSchema, ValidatedTypedSchema
+from karapace.schema_models import (
+    ParsedTypedSchema,
+    SchemaType,
+    SchemaVersion,
+    SchemaVersionManager,
+    TypedSchema,
+    ValidatedTypedSchema,
+)
 from karapace.schema_reader import KafkaSchemaReader
 from karapace.schema_references import LatestVersionReference, Reference
 from karapace.typing import JsonObject, Mode, ResolvedVersion, SchemaId, Subject, Version
-from typing import Mapping, Sequence
+from typing import Sequence
 
 import asyncio
 import logging
 
 LOG = logging.getLogger(__name__)
 
 
-def _resolve_version(
-    schema_versions: Mapping[ResolvedVersion, SchemaVersion],
-    version: Version,
-) -> ResolvedVersion:
-    max_version = max(schema_versions)
-    if isinstance(version, str) and version == "latest":
-        return max_version
-    resolved_version = ResolvedVersion(int(version))
-    if resolved_version <= max_version:
-        return resolved_version
-    raise VersionNotFoundException()
-
-
-def validate_version(version: Version) -> Version:
-    try:
-        version_number = int(version)
-        if version_number > 0:
-            return version
-        raise InvalidVersion(f"Invalid version {version_number}")
-    except ValueError as ex:
-        if version == "latest":
-            return version
-        raise InvalidVersion(f"Invalid version {version}") from ex
-
-
 class KarapaceSchemaRegistry:
     def __init__(self, config: Config) -> None:
         self.config = config
@@ -82,6 +63,7 @@ def __init__(self, config: Config) -> None:
             master_coordinator=self.mc,
             database=self.database,
         )
+        self.schema_version_manager = SchemaVersionManager()
 
         self.schema_lock = asyncio.Lock()
         self._master_lock = asyncio.Lock()
@@ -222,7 +204,7 @@ async def subject_version_delete_local(self, subject: Subject, version: Version,
                     for version_id, schema_version in schema_versions.items()
                     if schema_version.deleted is False
                 }
-            resolved_version = _resolve_version(schema_versions=schema_versions, version=version)
+            resolved_version = self.schema_version_manager.resolve_version(schema_versions=schema_versions, version=version)
             schema_version = schema_versions.get(resolved_version, None)
 
             if not schema_version:
@@ -261,11 +243,11 @@ def subject_get(self, subject: Subject, include_deleted: bool = False) -> dict[R
         return schemas
 
     def subject_version_get(self, subject: Subject, version: Version, *, include_deleted: bool = False) -> JsonObject:
-        validate_version(version)
+        self.schema_version_manager.validate_version(version)
         schema_versions = self.subject_get(subject, include_deleted=include_deleted)
         if not schema_versions:
             raise SubjectNotFoundException()
-        resolved_version = _resolve_version(schema_versions=schema_versions, version=version)
+        resolved_version = self.schema_version_manager.resolve_version(schema_versions=schema_versions, version=version)
         schema_data: SchemaVersion | None = schema_versions.get(resolved_version, None)
 
         if not schema_data:
@@ -293,11 +275,11 @@ def subject_version_get(self, subject: Subject, version: Version, *, include_del
     async def subject_version_referencedby_get(
         self, subject: Subject, version: Version, *, include_deleted: bool = False
     ) -> list:
-        validate_version(version)
+        self.schema_version_manager.validate_version(version)
         schema_versions = self.subject_get(subject, include_deleted=include_deleted)
         if not schema_versions:
             raise SubjectNotFoundException()
-        resolved_version = _resolve_version(schema_versions=schema_versions, version=version)
+        resolved_version = self.schema_version_manager.resolve_version(schema_versions=schema_versions, version=version)
         schema_data: SchemaVersion | None = schema_versions.get(resolved_version, None)
         if not schema_data:
             raise VersionNotFoundException()

karapace/schema_registry_apis.py

@@ -31,9 +31,16 @@
 from karapace.karapace import KarapaceBase
 from karapace.protobuf.exception import ProtobufUnresolvedDependencyException
 from karapace.rapu import HTTPRequest, JSON_CONTENT_TYPE, SERVER_NAME
-from karapace.schema_models import ParsedTypedSchema, SchemaType, SchemaVersion, TypedSchema, ValidatedTypedSchema
+from karapace.schema_models import (
+    ParsedTypedSchema,
+    SchemaType,
+    SchemaVersion,
+    SchemaVersionManager,
+    TypedSchema,
+    ValidatedTypedSchema,
+)
 from karapace.schema_references import LatestVersionReference, Reference, reference_from_mapping
-from karapace.schema_registry import KarapaceSchemaRegistry, validate_version
+from karapace.schema_registry import KarapaceSchemaRegistry
 from karapace.typing import JsonData, JsonObject, ResolvedVersion, SchemaId, Subject
 from karapace.utils import JSONDecodeError
 from typing import Any
@@ -814,7 +821,7 @@ async def subject_version_delete(
         self, content_type: str, *, subject: str, version: str, request: HTTPRequest, user: User | None = None
     ) -> None:
         self._check_authorization(user, Operation.Write, f"Subject:{subject}")
-        version = validate_version(version)
+        version = SchemaVersionManager.validate_version(version)
         permanent = request.query.get("permanent", "false").lower() == "true"
 
         are_we_master, master_url = await self.schema_registry.get_master()

karapace/utils.py

@@ -215,7 +215,7 @@ def convert_to_int(object_: dict, key: str, content_type: str) -> None:
         )
 
 
-def catch_and_raise_error(to_catch: tuple[Exception], to_raise: Exception):
+def intstr_conversion_guard(to_raise: BaseException):
     def wrapper(f):
         @functools.wraps(f)
         def catcher(*args, **kwargs):
@@ -224,7 +224,7 @@ def catcher(*args, **kwargs):
                 if not value:
                     raise to_raise
                 return value
-            except to_catch as exc:
+            except ValueError as exc:
                 raise to_raise from exc
 
         return catcher

tests/unit/test_utils.py

@@ -5,25 +5,18 @@
 See LICENSE for details
 """
 
-from karapace.utils import catch_and_raise_error
+from karapace.utils import intstr_conversion_guard
 
 import pytest
 
 
-def test_catch_and_raise_error():
+def test_intstr_conversion_guard():
     class RaiseMe(Exception):
         pass
 
-    @catch_and_raise_error(to_catch=(ValueError,), to_raise=RaiseMe)
-    def v():
+    @intstr_conversion_guard(to_raise=RaiseMe)
+    def raise_value_error():
         int("not a number")
 
     with pytest.raises(RaiseMe):
-        v()
-
-    @catch_and_raise_error(to_catch=(ZeroDivisionError,), to_raise=RaiseMe)
-    def z():
-        _ = 100 / 0
-
-    with pytest.raises(RaiseMe):
-        z()
+        raise_value_error()