MongoDB Specifics

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dbVisitor accesses MongoDB via the JDBC-Mongo driver over JDBC. Note:

• Use MongoDB commands; see supported commands.
• Supports JdbcTemplate, method annotations, and Mapper File.
• Supports rules and argument passing for complex command building.
• Supports ResultSetExtractor, RowMapper for consuming results.
• Supports Dynamic Command tags in mapper files.
• Supports Fluent API and BaseMapper.
• Supports ObjectMapping and ResultMapping.
• Does not support JdbcTemplate executeBatch.
• Does not support JdbcTemplate stored procedure APIs.

Analogy

MongoDB commands return one of three shapes: UpdateCount, Single Result, or ResultSet.

• Update count: similar to relational INSERT/UPDATE/DELETE; call executeUpdate.
• Single/multi row: similar to SELECT queries; all read commands (and commands that cannot report via update count) return result sets.
• Result sets expose _ID (first column) and _JSON (second column), both as strings.

Guide

Execute commands

• JSONB Query: run raw MongoDB commands via JdbcTemplate.
• Fluent API: type-safe MongoDB operations with LambdaTemplate.
• BaseMapper: simplify CRUD with BaseMapper.
• Annotations: use @Insert/@Update/@Delete on mapper interfaces for customized CRUD.
• Mapper File: configure commands via XML tags.