Packages

t

molecule.core.generic

GenericLog

trait GenericLog extends AnyRef

Log interface.

Datomic's database log is a recording of all transaction data in historic order, organized for efficient access by transaction.

Instantiate Log object with tx range arguments between from (inclusive) and until (exclusive), and add Log attributes to be returned as tuples of data:

for {
  // Data from transaction t1 until t4 (exclusive)
  _ <- Log(Some(t1), Some(t4)).t.e.a.v.op.get.map(_ ==> List(
    (t1, e1, ":Person/name", "Ben", true),
    (t1, e1, ":Person/age", 41, true),

    (t2, e2, ":Person/name", "Liz", true),
    (t2, e2, ":Person/age", 37, true),

    (t3, e1, ":Person/age", 41, false),
    (t3, e1, ":Person/age", 42, true)
  ))

  // If `from` is None, the range starts from the beginning
  _ <- Log(None, Some(t3)).v.e.t.get.map(_ ==> List(
    (t1, e1, ":Person/name", "Ben", true),
    (t1, e1, ":Person/age", 41, true),

    (t2, e2, ":Person/name", "Liz", true),
    (t2, e2, ":Person/age", 37, true)

    // t3 not included
  ))

  // If `until` is None, the range goes to the end
  _ <- Log(Some(t2), None).v.e.t.get.map(_ ==> List(
    // t1 not included

    (t2, e2, ":Person/name", "Liz", true),
    (t2, e2, ":Person/age", 37, true),

    (t3, e1, ":Person/age", 41, false),
    (t3, e1, ":Person/age", 42, true)
  ))
} yield ()

Log attributes available:

  • e - Entity id (Long)
  • a - Full attribute name like ":Person/name" (String)
  • v - Value of Datoms (Any)
  • t - Transaction pointer (Long/Int)
  • tx - Transaction entity id (Long)
  • txInstant - Transaction wall clock time (java.util.Date)
  • op - Operation status: assertion (true) / retraction (false)
Source
GenericLog.scala
Note

Contrary to the Datomic Log which is map of individual transactions the Molecule Log implementation is flattened to be one continuous list of transaction data. This is to have a transparent unified return type as all other molecules returning data. Data can always be grouped if needed.

Linear Supertypes
AnyRef, Any
Known Subclasses
api, api, in1_out1, in1_out10, in1_out11, in1_out12, in1_out13, in1_out14, in1_out15, in1_out16, in1_out17, in1_out18, in1_out19, in1_out2, in1_out20, in1_out21, in1_out22, in1_out3, in1_out4, in1_out5, in1_out6, in1_out7, in1_out8, in1_out9, in2_out1, in2_out10, in2_out11, in2_out12, in2_out13, in2_out14, in2_out15, in2_out16, in2_out17, in2_out18, in2_out19, in2_out2, in2_out20, in2_out21, in2_out22, in2_out3, in2_out4, in2_out5, in2_out6, in2_out7, in2_out8, in2_out9, in3_out1, in3_out10, in3_out11, in3_out12, in3_out13, in3_out14, in3_out15, in3_out16, in3_out17, in3_out18, in3_out19, in3_out2, in3_out20, in3_out21, in3_out22, in3_out3, in3_out4, in3_out5, in3_out6, in3_out7, in3_out8, in3_out9, out1, out10, out11, out12, out13, out14, out15, out16, out17, out18, out19, out2, out20, out21, out22, out3, out4, out5, out6, out7, out8, out9
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. GenericLog
  2. AnyRef
  3. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

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( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  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()
  14. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  16. def toString(): String
    Definition Classes
    AnyRef → Any
  17. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  18. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  19. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  20. object Log extends Log_0_0_L0[Log_, Init] with FirstNS

    Log object to start Log molecule.

Inherited from AnyRef

Inherited from Any

Ungrouped