程序包 org.springframework.boot

接口 BootstrapRegistry

所有已知子接口:

ConfigurableBootstrapContext

所有已知实现类:

DefaultBootstrapContext

public interface BootstrapRegistry

A simple object registry that is available during startup and Environment post-processing up to the point that the ApplicationContext is prepared.

Can be used to register instances that may be expensive to create, or need to be shared before the ApplicationContext is available.

The registry uses Class as a key, meaning that only a single instance of a given type can be stored.

The addCloseListener(ApplicationListener) method can be used to add a listener that can perform actions when BootstrapContext has been closed and the ApplicationContext is fully prepared. For example, an instance may choose to register itself as a regular Spring bean so that it is available for the application to use.

从以下版本开始:

2.4.0

作者:

Phillip Webb

另请参阅:

• BootstrapContext
• ConfigurableBootstrapContext

嵌套类概要

嵌套类

修饰符和类型	接口	说明
static interface	BootstrapRegistry.InstanceSupplier<T>	Supplier used to provide the actual instance when needed.
static enum	BootstrapRegistry.Scope	The scope of an instance.

方法概要

修饰符和类型	方法	说明
void	addCloseListener(ApplicationListener<BootstrapContextClosedEvent> listener)	Add an ApplicationListener that will be called with a BootstrapContextClosedEvent when the BootstrapContext is closed and the ApplicationContext has been prepared.
<T> BootstrapRegistry.InstanceSupplier<T>	getRegisteredInstanceSupplier(Class<T> type)	Return any existing BootstrapRegistry.InstanceSupplier for the given type.
<T> boolean	isRegistered(Class<T> type)	Return if a registration exists for the given type.
<T> void	register(Class<T> type, BootstrapRegistry.InstanceSupplier<T> instanceSupplier)	Register a specific type with the registry.
<T> void	registerIfAbsent(Class<T> type, BootstrapRegistry.InstanceSupplier<T> instanceSupplier)	Register a specific type with the registry if one is not already present.

方法详细资料

register

<T> void register(Class<T> type,
 BootstrapRegistry.InstanceSupplier<T> instanceSupplier)

Register a specific type with the registry. If the specified type has already been registered and has not been obtained as a singleton, it will be replaced.

类型参数:

T - the instance type

参数:

type - the instance type

instanceSupplier - the instance supplier

registerIfAbsent

<T> void registerIfAbsent(Class<T> type,
 BootstrapRegistry.InstanceSupplier<T> instanceSupplier)

Register a specific type with the registry if one is not already present.

类型参数:

T - the instance type

参数:

type - the instance type

instanceSupplier - the instance supplier

isRegistered

<T> boolean isRegistered(Class<T> type)

Return if a registration exists for the given type.

类型参数:

T - the instance type

参数:

type - the instance type

返回:

true if the type has already been registered

getRegisteredInstanceSupplier

<T> BootstrapRegistry.InstanceSupplier<T> getRegisteredInstanceSupplier(Class<T> type)

Return any existing BootstrapRegistry.InstanceSupplier for the given type.

类型参数:

T - the instance type

参数:

type - the instance type

返回:

the registered BootstrapRegistry.InstanceSupplier or null

addCloseListener

void addCloseListener(ApplicationListener<BootstrapContextClosedEvent> listener)

Add an ApplicationListener that will be called with a BootstrapContextClosedEvent when the BootstrapContext is closed and the ApplicationContext has been prepared.

参数:

listener - the listener to add