org.apache.mahout.math.backend

Backend

trait Backend extends SolverFactory

Overview

Backend representing collection of in-memory solvers or distributed operators.

Note to implementors

Backend is expected to initialize & verify its own viability lazily either upon first time the class is loaded, or upon the first invocation of any of its methods. After that, the value of Backend.isAvailable must be cached and defined.

A Backend is also a SolverFactory of course in a sense that it enumerates solvers made available via the backend.

Linear Supertypes
SolverFactory, AnyRef, Any
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Abstract Value Members

  1. abstract def isAvailable: Boolean

    If backend has loaded (lazily) ok and verified its availability/functionality, this must return true.

    If backend has loaded (lazily) ok and verified its availability/functionality, this must return true.

    returns

    true

  2. abstract val solverMap: Map[ClassTag[_], Any]

    Attributes
    protected[org.apache.mahout.math.backend]
    Definition Classes
    SolverFactory

Concrete 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. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  7. lazy val availableSolverTags: Iterable[ClassTag[_]]

    Definition Classes
    SolverFactory
  8. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. final def eq(arg0: AnyRef): Boolean

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

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

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  12. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  13. def getSolver[S](implicit arg0: ClassTag[S]): Option[S]

    We take an implicit context binding, the classTag, of the trait of the solver desired.

    We take an implicit context binding, the classTag, of the trait of the solver desired.

    Note to callers

    Due to Scala semantics, it is usually not enough to request a solver via merely

    val s:SolverType = backend.getSolver

    but instead requires an explicit solver tag, i.e.:

    val s = backend.getSolver[SolverType]
    Definition Classes
    SolverFactory
  14. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  15. final def isInstanceOf[T0]: Boolean

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

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

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

    Definition Classes
    AnyRef
  19. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  20. def toString(): String

    Definition Classes
    AnyRef → Any
  21. def validateMap(): Unit

    Attributes
    protected[org.apache.mahout.math.backend]
    Definition Classes
    SolverFactory
  22. final def wait(): Unit

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from SolverFactory

Inherited from AnyRef

Inherited from Any

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