Package org.springframework.boot

Interface BootstrapContext

All Known Subinterfaces:
ConfigurableBootstrapContext
All Known Implementing Classes:
DefaultBootstrapContext
public interface BootstrapContext
A simple bootstrap context that is available during startup and Environment post-processing up to the point that the ApplicationContext is prepared.

Provides lazy access to singletons that may be expensive to create, or need to be shared before the ApplicationContext is available.

Since:
2.4.0
Author:
Phillip Webb

  • Method Summary

    Modifier and Type
    Method
    Description
    <T> T
    get(Class<T> type)
    Return an instance from the context if the type has been registered.
    <T> T
    getOrElse(Class<T> type, T other)
    Return an instance from the context if the type has been registered.
    <T> T
    getOrElseSupply(Class<T> type, Supplier<T> other)
    Return an instance from the context if the type has been registered.
    <T, X extends Throwable>
    T
    getOrElseThrow(Class<T> type, Supplier<? extends X> exceptionSupplier)
    Return an instance from the context if the type has been registered.
    <T> boolean
    isRegistered(Class<T> type)
    Return if a registration exists for the given type.

  • Method Details

    • get

      <T> T get(Class<T> type) throws IllegalStateException
      Return an instance from the context if the type has been registered. The instance will be created it if it hasn't been accessed previously.
      Type Parameters:
      T - the instance type
      Parameters:
      type - the instance type
      Returns:
      the instance managed by the context
      Throws:
      IllegalStateException - if the type has not been registered

    • getOrElse

      <T> T getOrElse(Class<T> type, T other)
      Return an instance from the context if the type has been registered. The instance will be created it if it hasn't been accessed previously.
      Type Parameters:
      T - the instance type
      Parameters:
      type - the instance type
      other - the instance to use if the type has not been registered
      Returns:
      the instance

    • getOrElseSupply

      <T> T getOrElseSupply(Class<T> type, Supplier<T> other)
      Return an instance from the context if the type has been registered. The instance will be created it if it hasn't been accessed previously.
      Type Parameters:
      T - the instance type
      Parameters:
      type - the instance type
      other - a supplier for the instance to use if the type has not been registered
      Returns:
      the instance

    • getOrElseThrow

      <T, X extends Throwable> T getOrElseThrow(Class<T> type, Supplier<? extends X> exceptionSupplier) throws X
      Return an instance from the context if the type has been registered. The instance will be created it if it hasn't been accessed previously.
      Type Parameters:
      T - the instance type
      X - the exception to throw if the type is not registered
      Parameters:
      type - the instance type
      exceptionSupplier - the supplier which will return the exception to be thrown
      Returns:
      the instance managed by the context
      Throws:
      X - if the type has not been registered
      IllegalStateException - if the type has not been registered

    • isRegistered

      <T> boolean isRegistered(Class<T> type)
      Return if a registration exists for the given type.
      Type Parameters:
      T - the instance type
      Parameters:
      type - the instance type
      Returns:
      true if the type has already been registered