IdGeneratorProvider

IdGenerator container

DefaultIdGeneratorProvider

DefaultIdGeneratorProvider is the default IdGenerator container implementation. It is a thread-safe registry that manages named ID generator instances using a ConcurrentHashMap.

Key Features

• Thread-safe: Uses ConcurrentHashMap for concurrent access
• Singleton: Shared instance available via INSTANCE
• Named generators: Supports multiple named ID generators

Usage

Get Shared Generator

IdGenerator share = DefaultIdGeneratorProvider.INSTANCE.getShare();
long id = share.generate();

Get Named Generator

Optional<IdGenerator> orderGenerator = DefaultIdGeneratorProvider.INSTANCE.get("order");
orderGenerator.ifPresent(gen -> {
    long id = gen.generate();
});

Register Generator

DefaultIdGeneratorProvider.INSTANCE.set("order", segmentChainId);

Remove Generator

IdGenerator removed = DefaultIdGeneratorProvider.INSTANCE.remove("order");

LazyIdGenerator

LazyIdGenerator provides lazy loading of ID generators. The generator is only created when first accessed.

Usage

LazyIdGenerator lazyGenerator = new LazyIdGenerator(() -> {
    // Create generator on first access
    return new SegmentChainId(distributor);
});

Use Cases

• Defer expensive generator initialization
• Conditional generator creation based on configuration
• Testing scenarios where generator creation needs to be controlled