DP44/enriched-qwen3-coder-next/Common/DTS.Common/Enums/Database.md

source_files, generated_at, model, schema_version, sha256

source_files	generated_at	model	schema_version	sha256
Common/DTS.Common/Enums/Database/DbType.cs	2026-04-16T03:19:26.434083+00:00	Qwen/Qwen3-Coder-Next-FP8	1	b5b4c7897ced9899

Database

1. Purpose

This module defines the DbType enumeration, which categorizes database configurations within the DTS system based on their deployment and access patterns—specifically whether a database is accessible only remotely, only locally, or as a hybrid of both. It serves as a foundational type for configuring, selecting, or routing database operations according to deployment topology, likely used in higher-level data access or configuration components.

2. Public Interface

The module exposes a single public type:

• DbType (enum)
  • RemoteOnly = 0: Indicates the database is accessible only via remote connections (e.g., cloud-hosted, on-premises server accessed over network).
  • LocalOnly = 1: Indicates the database is accessible only via local connections (e.g., embedded SQLite, local SQL Server Express instance).
  • RemoteLocalHybrid = 2: Indicates the database supports both remote and local access modes, likely with logic to switch or prioritize based on context (e.g., offline-first sync scenarios).

3. Invariants

• The enum values are explicitly assigned integer constants (0, 1, 2) and must not be changed without coordinated updates across consumers.
• No validation or runtime enforcement is present in this file; callers are responsible for ensuring only defined values are used.
• The semantics of “remote” and “local” are implementation-contextual (e.g., “local” may mean same process/machine, but exact definition is not specified here).

4. Dependencies

• No external dependencies are declared in the source file (no using statements, no references to other types).
• Consumers: While not visible in this file, this enum is likely referenced by configuration parsers, database connection resolvers, or data access layers in other modules (e.g., DTS.Data, DTS.Server, or DTS.Client namespaces).
• Depends on: Only the .NET runtime (no explicit framework dependencies).

5. Gotchas

• Ambiguity in “Hybrid” semantics: The meaning of RemoteLocalHybrid is not clarified—e.g., whether it implies automatic failover, client-side routing logic, or dual-write behavior. This must be documented elsewhere.
• No None or Unknown value: Absence of a default/invalid state may lead to accidental misconfiguration if deserialization yields 0 (RemoteOnly) unintentionally.
• Fragile numeric assignments: Hardcoded values (0, 1, 2) could break serialization/deserialization (e.g., in JSON, config files, or databases) if reordered or extended.
• No documentation comments: XML doc comments are absent, so tooling cannot surface usage guidance.
• None identified from source alone. (Note: While the above points are reasonable concerns, they are inferred from common patterns—not directly observable in the source.)