initialize

Initializes the DatabaseManager and establishes the database connection infrastructure.

This method performs a complete initialization sequence that includes:

1. Setting up the HikariCP connection pool with optimized configuration

2. Testing the database connection to ensure connectivity

3. Creating or verifying all required database tables and schemas

4. Configuring MySQL-specific performance optimizations

5. Setting up connection monitoring and health checks

The initialization process is designed to be idempotent and can be called multiple times safely. If initialization fails at any step, the method will clean up partially completed setup and return false.

Connection Pool Configuration:

• Maximum pool size based on configuration (minimum 2 connections)

• Minimum idle connections set to half of maximum pool size

• Connection timeout: 30 seconds

• Idle timeout: 10 minutes

• Maximum connection lifetime: 30 minutes

• Leak detection threshold: 10 seconds

MySQL Optimizations Applied:

• Prepared statement caching with 250 statement cache size

• SQL limit of 2048 characters for cached statements

• Server-side prepared statements enabled

• Batch statement rewriting for bulk operations

• Result set metadata caching

• Connection metadata caching

• Auto-commit optimization

Database Schema Creation: All core tables are created with proper foreign key relationships, indexing for performance, and UTF-8 character set support.

Error Handling:

• SQLException: Database connectivity or SQL execution errors

• General Exception: Configuration errors or unexpected failures

• All errors are logged with full stack traces for debugging

See also

Throws