net.liftweb.http.LiftScreen

ScreenVar

abstract class ScreenVar[T] extends NonCleanAnyVar[T]

Keep request-local information around without the nastiness of naming session variables or the type-unsafety of casting the results. RequestVars share their value through the scope of the current HTTP request. They have no value at the beginning of request servicing and their value is discarded at the end of request processing. They are helpful to share values across many snippets.

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Inherited
  1. ScreenVar
  2. NonCleanAnyVar
  3. AnyVar
  4. AnyVarTrait
  5. HasCalcDefaultValue
  6. PSettableValueHolder
  7. SettableValueHolder
  8. Settable
  9. PValueHolder
  10. ValueHolder
  11. AnyRef
  12. Any
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Instance Constructors

  1. new ScreenVar(dflt: ⇒ T)

    dflt

    - the default value of the session variable

Type Members

  1. type CleanUpParam = Unit

    Definition Classes
    NonCleanAnyVarAnyVarTrait
  2. type ValueType = T

    Definition Classes
    PValueHolderValueHolder

Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  6. def __nameSalt: String

    Attributes
    protected
    Definition Classes
    AnyVarTrait
  7. def apply(what: T): T

    Set the session variable

    Set the session variable

    what

    -- the value to set the session variable to

    Definition Classes
    AnyVarTrait
  8. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  9. def atomicUpdate(f: (ValueType) ⇒ ValueType): ValueType

    Perform an atomic update of this Settable.

    Perform an atomic update of this Settable. The current value is passed to the function and the ValueHolder is set to the result of the function. This is enclosed in the performAtomicOperation method which will, by default, synchronize this instance

    Definition Classes
    Settable
  10. def calcDefaultValue: T

    Attributes
    protected
    Definition Classes
    AnyVarAnyVarTraitHasCalcDefaultValue
  11. def clearFunc(name: String): Unit

    Attributes
    protected
    Definition Classes
    ScreenVarAnyVarTrait
  12. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  13. def doSync[F](f: ⇒ F): F

    Different Vars require different mechanisms for synchronization.

    Different Vars require different mechanisms for synchronization. This method implements the Var specific synchronization mechanism

    Definition Classes
    ScreenVarAnyVarTrait
  14. def doWith[F](newVal: T)(f: ⇒ F): F

    Change the value of the Var for the lifespan of the function

    Change the value of the Var for the lifespan of the function

    Definition Classes
    AnyVarTrait
  15. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  16. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  17. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  18. def findFunc(name: String): Box[T]

    Attributes
    protected
    Definition Classes
    ScreenVarAnyVarTrait
  19. def get: T

    Shadow of the 'is' method

    Shadow of the 'is' method

    Definition Classes
    AnyVarTraitValueHolder
  20. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  21. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  22. def is: T

    The current value of the variable

    The current value of the variable

    Definition Classes
    AnyVarTraitValueHolder
  23. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  24. lazy val name: String

    Attributes
    protected
    Definition Classes
    AnyVarTrait
  25. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  26. final def notify(): Unit

    Definition Classes
    AnyRef
  27. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  28. def onShutdown(session: CleanUpParam): Unit

    Attributes
    protected
    Definition Classes
    AnyVarTrait
  29. def performAtomicOperation[T](f: ⇒ T): T

    Perform an atomic operation on the Settable.

    Perform an atomic operation on the Settable. By default synchronizes the instance, but it could use other mechanisms

    Definition Classes
    Settable
  30. def registerCleanupFunc(in: (Unit) ⇒ Unit): Unit

    Attributes
    protected
    Definition Classes
    NonCleanAnyVarAnyVarTrait
  31. final def registerGlobalCleanupFunc(in: (CleanUpParam) ⇒ Unit): Unit

    Attributes
    protected
    Definition Classes
    AnyVarTrait
  32. def remove(): Unit

    Definition Classes
    AnyVarTrait
  33. def set(what: T): T

    Shadow of the apply method

    Shadow of the apply method

    Definition Classes
    AnyVarTraitSettable
  34. def setFunc(name: String, value: T): Unit

    Attributes
    protected
    Definition Classes
    ScreenVarAnyVarTrait
  35. def setIsUnset(value: ⇒ T): T

    Set the Var if it has not been calculated

    Set the Var if it has not been calculated

    Definition Classes
    AnyVarTrait
  36. def set_?: Boolean

    Has this Var been set or accessed and had its default value calculated

    Has this Var been set or accessed and had its default value calculated

    Definition Classes
    AnyVarTrait
  37. def settingDefault_?: Boolean

    Attributes
    protected
    Definition Classes
    AnyVarTrait
  38. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  39. def testWasSet(name: String, bn: String): Boolean

    A non-side-effecting test if the value was initialized

    A non-side-effecting test if the value was initialized

    Attributes
    protected
    Definition Classes
    ScreenVarAnyVarTrait
  40. def toString(): String

    Definition Classes
    AnyVarTrait → AnyRef → Any
  41. def update(f: (T) ⇒ T): T

    Applies the given function to the contents of this variable and sets the variable to the resulting value.

    Applies the given function to the contents of this variable and sets the variable to the resulting value.

    f

    -- the function to apply and set the result from.

    Definition Classes
    AnyVarTrait
  42. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  43. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  44. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  45. def wasInitialized(name: String, bn: String): Boolean

    Attributes
    protected
    Definition Classes
    ScreenVarAnyVarTrait

Inherited from NonCleanAnyVar[T]

Inherited from util.AnyVar[T, NonCleanAnyVar[T]]

Inherited from AnyVarTrait[T, NonCleanAnyVar[T]]

Inherited from HasCalcDefaultValue[T]

Inherited from PSettableValueHolder[T]

Inherited from SettableValueHolder

Inherited from Settable

Inherited from PValueHolder[T]

Inherited from ValueHolder

Inherited from AnyRef

Inherited from Any

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