Priority: HIGH
Effort: 2 days
Phase: Phase 1 - Foundation
Week: 3-4 (Exception Handling)

Description

Design standardized exception hierarchy with error codes

Steps

1. Document current exception types (46 identified)
2. Design base ArcadeDBException class with:
   • ErrorCode enum
   • Context map for diagnostics
   • JSON serialization
   • Builder pattern
3. Define error code categories:
   • Database errors (1xxx)
   • Transaction errors (2xxx)
   • Query errors (3xxx)
   • Security errors (4xxx)
   • I/O errors (5xxx)
   • Network errors (6xxx)
4. Create exception hierarchy diagram
5. Write design document
6. Review with team

Files to Create

• engine/src/main/java/com/arcadedb/exception/ArcadeDBException.java
• engine/src/main/java/com/arcadedb/exception/ErrorCode.java
• engine/src/main/java/com/arcadedb/exception/ExceptionBuilder.java
• docs/architecture/ADR-001-exception-handling.md

Acceptance Criteria

• Exception hierarchy designed
• Error code system defined
• Design document written
• Team approval received