ObjectFactory和FactoryBean区别

Z时代
2024-01-10
分类：综合

应用场景

/** Cache of singleton objects: bean name to bean instance. */
	private final Map<String, Object> singletonObjects = new ConcurrentHashMap<>(256);
	/** Cache of singleton factories: bean name to ObjectFactory. */
//第三级缓存运用了ObjectFactory
	private final Map<String, ObjectFactory<?>> singletonFactories = new HashMap<>(16);
	/** Cache of early singleton objects: bean name to bean instance. */
	private final Map<String, Object> earlySingletonObjects = new HashMap<>(16);

FactorBean

public interface FactoryBean<T> {
	@Nullable
	T getObject() throws Exception;
	@Nullable
	Class<?> getObjectType();
	default boolean isSingleton() {
		return true;
	}
}