Packages

object STMImpl extends STMSelector

STMImpl gathers all of the functionality required to plug an STM implementation into scala.concurrent.stm. Only one implementation can be selected, because Refs and atomic blocks from different STM implementations are not compatible. STMImpl.instance returns the STMImpl instance that has been selected for this program execution.

There are two ways to explicitly select the STMImpl instance:

  1. set the JVM system property "scala.stm.impl" to the name of a class that implements STMImpl; or

2. arrange for STMImpl.select or STMImpl.trySelect to be called before any Refs are constructed and before any atomic blocks are executed.

Setting the JVM system property "scala.stm.impl" is equivalent to making a call to STMImpl.select(System.getProperty("scala.stm.impl")) before any other STMImpl selections.

If there is no explicitly selected STMImpl instance and the classpath contains a class scala.concurrent.stm.impl.DefaultFactory that extends scala.concurrent.stm.impl.STMImpl.Factory, then an instance of that class will be instantiated and used to generate the STMImpl instance. ScalaSTM implementations are encouraged to implement DefaultFactory so that if a user includes the implementation's JAR file, it will be automatically selected.

If no explicit selection has been made and there is no definition of scala.concurrent.stm.impl.DefaultFactory present in the classpath, then ScalaSTM will fall back to the reference implementation "scala.concurrent.stm.ccstm.CCSTM".

Linear Supertypes
STMSelector, AnyRef, Any
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  1. STMImpl
  2. STMSelector
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Type Members

  1. trait Factory extends AnyRef

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native() @HotSpotIntrinsicCandidate()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  8. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  9. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  10. def instance: STMImpl

    Returns the instance of STMImpl that should be used to implement all ScalaSTM functionality.

    Returns the instance of STMImpl that should be used to implement all ScalaSTM functionality. Calling this method forces the implementation to be chosen if it has not already been selected.

  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  14. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  15. def select(impl: STMImpl): Unit

    Installs impl as the system-wide STM implementation if no STMImpl has yet been chosen, or verifies that impl is equal to the previously selected instance, throwing IllegalStateException if an STM implementation has already been selected and impl != instance

    Installs impl as the system-wide STM implementation if no STMImpl has yet been chosen, or verifies that impl is equal to the previously selected instance, throwing IllegalStateException if an STM implementation has already been selected and impl != instance

    Definition Classes
    STMSelector
  16. def select(implClassName: String): Unit

    Installs Class.forName(implClassName) as the system-wide STM implementation if no STMImpl has yet been chosen, or verifies that implClassName was previously selected, throwing IllegalStateException if a different STM implementation has already been selected

    Installs Class.forName(implClassName) as the system-wide STM implementation if no STMImpl has yet been chosen, or verifies that implClassName was previously selected, throwing IllegalStateException if a different STM implementation has already been selected

    Definition Classes
    STMSelector
  17. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  18. def toString(): String
    Definition Classes
    AnyRef → Any
  19. def trySelect(implClassName: String): Boolean

    If no STMImpl instance has yet been selected, installs an instance of Class.forName(implClassName) as the system-wide STM implementation.

    If no STMImpl instance has yet been selected, installs an instance of Class.forName(implClassName) as the system-wide STM implementation. Returns true if implClassName was newly or previously selected, or returns false if another STM implementation was chosen.

    Definition Classes
    STMSelector
  20. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  21. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  22. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

Inherited from STMSelector

Inherited from AnyRef

Inherited from Any

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