Class CurrentReactiveScope

Method Details

• block

  public static void block()

  Mark the current reactive computation as reactively blocking. If there's no current reactive computation (ReactiveScope.current() is null), this method has no effect.

  See Also:

  • ReactiveScope.block()
  • ReactiveScope.current()
  • Reactive blocking

• blocked

  public static boolean blocked()

  Returns true if the current reactive computation is reactively blocking. If there's no current reactive computation (ReactiveScope.current() is null), this method returns false.

  Returns:

  true if the current reactive computation is reactively blocking, false otherwise

  See Also:

  • ReactiveScope.blocked()
  • ReactiveScope.current()
  • Reactive blocking

• freeze

  public static <T> T freeze(Object key, Supplier<T> supplier)

  Freezes result of specified computation. On first call with given key, returns result of evaluating the supplier. On subsequent calls within the same reactive computation, returns the same result without calling the supplier. If there's no current reactive computation (ReactiveScope.current() is null), this method evaluates supplier anew on every call. The supplier should be always the same for given key.

  Type Parameters:

  T - type of value returned by the supplier

  Parameters:

  key - identifier for particular frozen value, which implements Object.equals(Object) and Object.hashCode()

  supplier - value supplier to evaluate

  Returns:

  value computed by supplier or previously frozen value

  See Also:

  • ReactiveScope.freeze(Object, Supplier)
  • ReactiveScope.current()

• pin

  public static <T> T pin(Object key, Supplier<T> supplier)

  Pins result of specified computation. On first call with given key, returns result of evaluating the supplier. On subsequent calls within the same sequence of blocking reactive computations (pin lifetime), returns the same result without calling the supplier. If there's no current reactive computation (ReactiveScope.current() is null), this method evaluates supplier anew on every call. The supplier should be always the same for given key.

  Type Parameters:

  T - type of value returned by the supplier

  Parameters:

  key - identifier for particular pinned value, which implements Object.equals(Object) and Object.hashCode()

  supplier - value supplier to evaluate

  Returns:

  value computed by supplier or previously pinned value

  See Also:

  • ReactiveScope.pin(Object, Supplier)
  • ReactiveScope.current()
  • Reactive blocking