ConditionalOnMissingPod class

The ConditionalOnMissingPod annotation in Jetleaf allows developers to conditionally process a class or method only when certain pods are not present in the application context.

This is particularly useful for providing fallback configurations or alternative beans/pods when expected ones are absent.

Key Features:

• Ensures a pod is only loaded if another pod type or name is missing.
• Supports ignoring specific annotations when determining pod presence.
• Supports ignoring entire pod types to avoid conflicts with infrastructure.

Usage Examples:

// Only load an embedded database when no DataSource is present
@ConditionalOnMissingPod(types: [ClassType<DataSource>()])
class EmbeddedDatabaseConfig {}

// Provide a fallback service if a specific pod name is missing
@ConditionalOnMissingPod(name: ['myCustomService'])
class FallbackServiceConfig {}

// Ignore infrastructure pods while checking for missing dependencies
@ConditionalOnMissingPod(
  types: [ClassType<MyService>()],
  ignoredTypes: [ClassType<DataSource>()],
)
class AlternativeServiceConfig {}

This ensures Jetleaf applications remain flexible by enabling conditional fallbacks and context-aware configuration.