slick.dbio

DBIOAction

Related Docs: object DBIOAction | package dbio

sealed trait DBIOAction[+R, +S <: NoStream, -E <: Effect] extends Dumpable

A Database I/O Action that can be executed on a database. The DBIOAction type allows a separation of execution logic and resource usage management logic from composition logic. DBIOActions can be composed with methods such as andThen, andFinally and flatMap. Individual parts of a composite DBIOAction are always executed serially on a single database, but possibly in different database sessions, unless the session is pinned either explicitly (using withPinnedSession) or implicitly (e.g. through a transaction).

The actual implementation base type for all Actions is DBIOAction. StreamingDBIO and DBIO are type aliases which discard the effect type (and the streaming result type in the latter case) to make DBIOAction types easier to write when these features are not needed. All primitive DBIOActions and all DBIOActions produced by the standard combinators in Slick have correct Effect types and are streaming (if possible).

R

The result type when executing the DBIOAction and fully materializing the result.

S

An encoding of the result type for streaming results. If this action is capable of streaming, it is Streaming[T] for an element type T. For non-streaming DBIOActions it is NoStream.

E

The DBIOAction's effect type, e.g. Effect.Read with Effect.Write. When composing actions, the correct combined effect type will be inferred. Effects can be used in user code, e.g. to automatically direct all read-only Actions to a slave database and write Actions to the master copy.

Source
DBIOAction.scala
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Abstract Value Members

  1. abstract def getDumpInfo: DumpInfo

    Return the name, main info, attribute info and named children

    Return the name, main info, attribute info and named children

    Definition Classes
    Dumpable

Concrete Value Members

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

    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

    Definition Classes
    AnyRef → Any
  3. def +(other: String): String

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to any2stringadd[DBIOAction[R, S, E]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (DBIOAction[R, S, E], B)

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to ArrowAssoc[DBIOAction[R, S, E]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  6. final def >>[R2, S2 <: NoStream, E2 <: Effect](a: DBIOAction[R2, S2, E2]): DBIOAction[R2, S2, E with E2]

    A shortcut for andThen.

  7. def andFinally[E2 <: Effect](a: DBIOAction[_, NoStream, E2]): DBIOAction[R, S, E with E2]

    Run another action after this action, whether it succeeds or fails, and then return the result of the first action.

    Run another action after this action, whether it succeeds or fails, and then return the result of the first action. If the first action fails, its failure is propagated, whether the second action fails or succeeds. If the first action succeeds, a failure of the second action is propagated.

  8. def andThen[R2, S2 <: NoStream, E2 <: Effect](a: DBIOAction[R2, S2, E2]): DBIOAction[R2, S2, E with E2]

    Run another action after this action, if it completed successfully, and return the result of the second action.

    Run another action after this action, if it completed successfully, and return the result of the second action. If either of the two actions fails, the resulting action also fails.

  9. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  10. def asTry: DBIOAction[Try[R], NoStream, E]

    Convert a successful result v of this action into a successful result Success(v) and a failure t into a successful result Failure(t).

    Convert a successful result v of this action into a successful result Success(v) and a failure t into a successful result Failure(t). This is the most generic combinator that can be used for error recovery. If possible, use andFinally or cleanUp instead, because those combinators, unlike asTry, support streaming.

  11. def cleanUp[E2 <: Effect](f: (Option[Throwable]) ⇒ DBIOAction[_, NoStream, E2], keepFailure: Boolean = true)(implicit executor: ExecutionContext): DBIOAction[R, S, E with E2]

    Run another action after this action, whether it succeeds or fails, in order to clean up or transform an error produced by this action.

    Run another action after this action, whether it succeeds or fails, in order to clean up or transform an error produced by this action. The clean-up action is computed from the failure of this action, wrapped in Some, or None if this action succeeded.

    keepFailure

    If this action returns successfully, the resulting action also returns successfully unless the clean-up action fails. If this action fails and keepFailure is set to true (the default), the resulting action fails with the same error, no matter whether the clean-up action succeeds or fails. If keepFailure is set to false, an error from the clean-up action will override the error from this action.

  12. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  13. def ensuring(cond: (DBIOAction[R, S, E]) ⇒ Boolean, msg: ⇒ Any): DBIOAction[R, S, E]

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to Ensuring[DBIOAction[R, S, E]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: (DBIOAction[R, S, E]) ⇒ Boolean): DBIOAction[R, S, E]

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to Ensuring[DBIOAction[R, S, E]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: Boolean, msg: ⇒ Any): DBIOAction[R, S, E]

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to Ensuring[DBIOAction[R, S, E]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. def ensuring(cond: Boolean): DBIOAction[R, S, E]

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to Ensuring[DBIOAction[R, S, E]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  17. final def eq(arg0: AnyRef): Boolean

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

    Definition Classes
    AnyRef → Any
  19. def failed: DBIOAction[Throwable, NoStream, E]

    Return an action which contains the Throwable with which this action failed as its result.

    Return an action which contains the Throwable with which this action failed as its result. If this action succeeded, the resulting action fails with a NoSuchElementException.

  20. final def filter(p: (R) ⇒ Boolean)(implicit executor: ExecutionContext): DBIOAction[R, NoStream, E]

    Filter the result of this action with the given predicate.

    Filter the result of this action with the given predicate. If the predicate matches, the original result is returned, otherwise the resulting action fails with a NoSuchElementException.

  21. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  22. def flatMap[R2, S2 <: NoStream, E2 <: Effect](f: (R) ⇒ DBIOAction[R2, S2, E2])(implicit executor: ExecutionContext): DBIOAction[R2, S2, E with E2]

    Use the result produced by the successful execution of this action to compute and then run the next action in sequence.

    Use the result produced by the successful execution of this action to compute and then run the next action in sequence. The resulting action fails if either this action, the computation, or the computed action fails.

  23. def formatted(fmtstr: String): String

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to StringFormat[DBIOAction[R, S, E]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  24. final def getClass(): Class[_]

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

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

    Definition Classes
    Any
  27. def isLogged: Boolean

    Whether or not this action should be included in log output by default.

  28. def map[R2](f: (R) ⇒ R2)(implicit executor: ExecutionContext): DBIOAction[R2, NoStream, E]

    Transform the result of a successful execution of this action.

    Transform the result of a successful execution of this action. If this action fails, the resulting action also fails.

  29. def named(name: String): DBIOAction[R, S, E]

    Get a wrapping action which has a name that will be included in log output.

  30. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  31. def nonFusedEquivalentAction: DBIOAction[R, S, E]

    Get the equivalent non-fused action if this action has been fused, otherwise this action is returned.

  32. final def notify(): Unit

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

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

    Definition Classes
    AnyRef
  35. def toString(): String

    Definition Classes
    AnyRef → Any
  36. final def wait(): Unit

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  39. def withFilter(p: (R) ⇒ Boolean)(implicit executor: ExecutionContext): DBIOAction[R, NoStream, E]

  40. def withPinnedSession: DBIOAction[R, S, E]

    Use a pinned database session when running this action.

    Use a pinned database session when running this action. If it is composed of multiple database actions, they will all use the same session, even when sequenced with non-database actions. For non-composite or non-database actions, this has no effect.

  41. def zip[R2, E2 <: Effect](a: DBIOAction[R2, NoStream, E2]): DBIOAction[(R, R2), NoStream, E with E2]

    Run another action after this action, if it completed successfully, and return the result of both actions.

    Run another action after this action, if it completed successfully, and return the result of both actions. If either of the two actions fails, the resulting action also fails.

  42. def [B](y: B): (DBIOAction[R, S, E], B)

    Implicit information
    This member is added by an implicit conversion from DBIOAction[R, S, E] to ArrowAssoc[DBIOAction[R, S, E]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Dumpable

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from DBIOAction[R, S, E] to any2stringadd[DBIOAction[R, S, E]]

Inherited by implicit conversion StringFormat from DBIOAction[R, S, E] to StringFormat[DBIOAction[R, S, E]]

Inherited by implicit conversion Ensuring from DBIOAction[R, S, E] to Ensuring[DBIOAction[R, S, E]]

Inherited by implicit conversion ArrowAssoc from DBIOAction[R, S, E] to ArrowAssoc[DBIOAction[R, S, E]]

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