Packages

  • package root

    Documentation/API for the Molecule library - a meta DSL for the Datomic database.

    scalamolecule.org | Github | Forum

    Definition Classes
    root
  • package molecule

    Molecule library - a Scala meta-DSL for the Datomic database.

    Molecule library - a Scala meta-DSL for the Datomic database.

    Definition Classes
    root
  • package core
    Definition Classes
    molecule
  • package api
    Definition Classes
    core
  • package exception
    Definition Classes
    api
  • package getAsyncObj

    Asynchronous getter methods to retrieve data as objects.

    Asynchronous getter methods to retrieve data as objects.

    For convenience, all synchronous getter methods from the get package are here wrapped in Futures.

    The Datomic On-Prem(ises) server model provides a Peer that returns data synchronously. The Peer which lives in application memory caches data aggressively and for data fitting in memory, latency can be extremely low and queries return very fast. And even when access to disk is needed, clever branching is used. Memcached is also an option.

    The Datomic Cloud model data returns data asynchronously. If Datomic creates a Java API for the Cloud model, Molecule could relatively easy adapt to this model too. In the meanwhile, Future-wrapped methods in this package can be used.

    Molecule has 4 groups of asynchronous getters for objects, each returning Futures of data in various formats:

    • GetAsyncObjArray - fastest retrieved typed data set. Can be traversed with a fast while loop
    • GetAsyncObjIterable - for lazily traversing row by row
    • GetAsyncObjList - default getter returning Lists of objects. Convenient typed data, suitable for smaller data sets
    • GetAsyncRaw - fastest retrieved raw un-typed data from Datomic

    Getters in each of the 4 groups come with 5 time-dependent variations:

    • getAsync [current data]
    • getAsyncAsOf
    • getAsyncSince
    • getAsyncWith
    • getAsyncHistory

    Each time variation has various overloads taking different parameters (see each group for more info).

    Definition Classes
    api
    See also

    equivalent synchronous getters in the getTpl package.

  • package getAsyncTpl

    Asynchronous getter methods to retrieve tuples of data.

    Asynchronous getter methods to retrieve tuples of data.

    For convenience, all synchronous getter methods from the get package are here wrapped in Futures.

    The Datomic On-Prem(ises) server model provides a Peer that returns data synchronously. The Peer which lives in application memory caches data aggressively and for data fitting in memory, latency can be extremely low and queries return very fast. And even when access to disk is needed, clever branching is used. Memcached is also an option.

    The Datomic Cloud model data returns data asynchronously. If Datomic creates a Java API for the Cloud model, Molecule could relatively easy adapt to this model too. In the meanwhile, Future-wrapped methods in this package can be used.

    Molecule has 4 groups of asynchronous getters for tuples, each returning Futures of data in various formats:

    • GetAsyncTplArray - fastest retrieved typed data set. Can be traversed with a fast while loop
    • GetAsyncTplIterable - for lazily traversing row by row
    • GetAsyncTplList - default getter returning Lists of tuples. Convenient typed data, suitable for smaller data sets
    • GetAsyncRaw - fastest retrieved raw un-typed data from Datomic

    Getters in each of the 4 groups come with 5 time-dependent variations:

    • getAsync [current data]
    • getAsyncAsOf
    • getAsyncSince
    • getAsyncWith
    • getAsyncHistory

    Each time variation has various overloads taking different parameters (see each group for more info).

    Definition Classes
    api
    See also

    equivalent synchronous getters in the getTpl package.

  • package getObj

    Synchronous getter methods to retrieve data as objects.

    Synchronous getter methods to retrieve data as objects.

    The Datomic On-Prem(ises) server model provides a Peer that returns data synchronously. The Peer which lives in application memory caches data aggressively and for data fitting in memory latency can be extremely low and queries return very fast. And even when access to disk is needed, clever branching is used. Memcached is also an option.

    The Datomic Cloud model data returns data asynchronously. If Datomic creates a Java API for the Cloud model, Molecule could relatively easy adapt to this model too. In the meanwhile, Future-wrapped methods in this package can be used.

    Molecule has 3 groups of synchronous object getters, each returning data in various formats:

    • GetObjArray - fastest retrieved typed data set. Can be traversed with a fast while loop
    • GetObjIterable - for lazily traversing row by row
    • GetObjList - default getter returning Lists of objects. Convenient typed data, suitable for smaller data sets

    Getters in each of the 5 groups come with 5 time-dependent variations:

    • get [current data]
    • getAsOf
    • getSince
    • getWith
    • getHistory

    Each time variation has various overloads taking different parameters (see each group for more info).

    Definition Classes
    api
    See also

    equivalent asynchronous getters in the getAsyncTpl package.

  • package getTpl

    Synchronous getter methods to retrieve data as tuples.

    Synchronous getter methods to retrieve data as tuples.

    The Datomic On-Prem(ises) server model provides a Peer that returns data synchronously. The Peer which lives in application memory caches data aggressively and for data fitting in memory latency can be extremely low and queries return very fast. And even when access to disk is needed, clever branching is used. Memcached is also an option.

    Molecule has 4 groups of synchronous tuple getters, each returning data in various formats:

    • GetTplArray - fastest retrieved typed data set. Can be traversed with a fast while loop
    • GetTplIterable - for lazily traversing row by row
    • GetTplList - default getter returning Lists of tuples. Convenient typed data, suitable for smaller data sets
    • GetRaw - fastest retrieved raw un-typed data from Datomic

    Getters in each of the 4 groups come with 5 time-dependent variations:

    • get [current data]
    • getAsOf
    • getSince
    • getWith
    • getHistory

    Each time variation has various overloads taking different parameters (see each group for more info).

    Definition Classes
    api
    See also

    equivalent asynchronous getters in the getAsyncTpl package.

  • GetAsyncRaw
  • GetRaw
  • InputMolecule
  • Keywords
  • Molecule_0
  • Molecule_1
  • Molecule_2
  • Molecule_3
  • OptionalMapOps
  • TxBundles
  • TxFunctions
t

molecule.core.api

InputMolecule

trait InputMolecule extends Molecule

Shared interface of all input molecules.

Input molecules are molecules that awaits one or more inputs at runtime. When input value is applied, the input molecule is resolved and a standard molecule is returned that we can then call actions on.

Input molecule queries are cached by Datomic. So there is a runtime performance gain in using input molecules. Furthermore, input molecules are a good fit for re-use for queries where only a few parameters change.

Input molecules can await 1, 2 or 3 inputs and are constructed by applying the ? marker to attributes. If one marker is applied, we get a Molecule_1, 2 inputs creates an Molecule_2 and 3 an Molecule_3.

The three input molecule interfaces come in arity-versions corresponding to the number of non-?-marked attributes in the input molecule. Let's see a simple example:

// Sample data
Person.name.age insert List(
  ("Joe", 42),
  ("Liz", 34)
)

// Input molecule created at compile time. Awaits a name of type String
val ageOfPersons: Molecule_1.Molecule_1_01[String, Int] = m(Person.name_(?).age)

// Resolved molecule. "Joe" input is matched against name attribute
val ageOfPersonsNamedJoe: Molecule.Molecule01[Int] = ageOfPersons.apply("Joe")

// Calling action on resolved molecule.
// (Only age is returned since name was marked as tacit with the underscore notation)
ageOfPersonsNamedJoe.get === List(42)

// Or we can re-use the input molecule straight away
ageOfPersons("Liz").get === List(34)
Source
InputMolecule.scala
Linear Supertypes
Molecule, AnyRef, Any
Known Subclasses
Molecule_1, Molecule_1_01, Molecule_1_02, Molecule_1_03, Molecule_1_04, Molecule_1_05, Molecule_1_06, Molecule_1_07, Molecule_1_08, Molecule_1_09, Molecule_1_10, Molecule_1_11, Molecule_1_12, Molecule_1_13, Molecule_1_14, Molecule_1_15, Molecule_1_16, Molecule_1_17, Molecule_1_18, Molecule_1_19, Molecule_1_20, Molecule_1_21, Molecule_1_22, Molecule_2, Molecule_2_01, Molecule_2_02, Molecule_2_03, Molecule_2_04, Molecule_2_05, Molecule_2_06, Molecule_2_07, Molecule_2_08, Molecule_2_09, Molecule_2_10, Molecule_2_11, Molecule_2_12, Molecule_2_13, Molecule_2_14, Molecule_2_15, Molecule_2_16, Molecule_2_17, Molecule_2_18, Molecule_2_19, Molecule_2_20, Molecule_2_21, Molecule_2_22, Molecule_3, Molecule_3_01, Molecule_3_02, Molecule_3_03, Molecule_3_04, Molecule_3_05, Molecule_3_06, Molecule_3_07, Molecule_3_08, Molecule_3_09, Molecule_3_10, Molecule_3_11, Molecule_3_12, Molecule_3_13, Molecule_3_14, Molecule_3_15, Molecule_3_16, Molecule_3_17, Molecule_3_18, Molecule_3_19, Molecule_3_20, Molecule_3_21, Molecule_3_22
Ordering
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Inherited
  1. InputMolecule
  2. Molecule
  3. AnyRef
  4. Any
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Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract val _model: Model

    Internal Model representation of molecule.

    Internal Model representation of molecule.

    Molecule transforms custom boilerplate DSL constructs to Datomic queries in 3 steps:

    Custom DSL molecule --> Model --> Query --> Datomic query string

    Definition Classes
    Molecule
  2. abstract val _nestedQuery: Option[Query]

    Internal optional Query representation of nested molecule with added entity search for each level.

    Internal optional Query representation of nested molecule with added entity search for each level.

    Molecule transforms custom boilerplate DSL constructs to Datomic queries in 3 steps:

    Custom DSL molecule --> Model --> Query --> Datomic query string

    Definition Classes
    Molecule
  3. abstract val _query: Query

    Internal Query representation of molecule.

    Internal Query representation of molecule.

    Molecule transforms custom boilerplate DSL constructs to Datomic queries in 3 steps:

    Custom DSL molecule --> Model --> Query --> Datomic query string

    Definition Classes
    Molecule
  4. abstract val _rawNestedQuery: Option[Query]

    Internal un-optimized optional Query representation of nested molecule with added entity search for each level.

    Internal un-optimized optional Query representation of nested molecule with added entity search for each level.

    Molecule transforms custom boilerplate DSL constructs to Datomic queries in 3 steps:

    Custom DSL molecule --> Model --> Query --> Datomic query string

    Definition Classes
    Molecule
  5. abstract val _rawQuery: Query

    Internal un-optimized Query representation molecule.

    Internal un-optimized Query representation molecule.

    Molecule transforms custom boilerplate DSL constructs to Datomic queries in 3 steps:

    Custom DSL molecule --> Model --> Query --> Datomic query string

    Definition Classes
    Molecule

Concrete 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. def addNilClause(clauses: Seq[Clause], e: Var, kw: KW, v0: Var): Seq[Clause]
    Attributes
    protected
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def cardinality(nsFull: String, attr: String): Int
    Attributes
    protected
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  8. def dataClause(e: String, kw: KW, enumPrefix: Option[String], arg: Any, i: Int): Seq[Clause]
    Attributes
    protected
  9. def deepNil(args: Seq[Any]): Boolean
    Attributes
    protected
  10. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  12. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  13. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  14. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  15. def isExpression(nsFull: String, attr: String): Boolean
    Attributes
    protected
  16. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  17. def isTacit(nsFull: String, attr: String): Boolean
    Attributes
    protected
  18. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  19. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  20. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  21. def resolveInput[T](query: Query, ph: Placeholder, inputs: Seq[T], ruleName: String = "rule1", unifyRule: Boolean = false): Query
    Attributes
    protected
  22. def resolveOr[I1](or: Or[I1]): Seq[I1]
    Attributes
    protected
  23. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  24. def toString(): String
    Definition Classes
    AnyRef → Any
  25. def valueClauses[TT](e: String, kw: KW, enumPrefix: Option[String], args: TT): Seq[Clause]
    Attributes
    protected
  26. def varsAndPrefixes(query: Query): Seq[(Var, String)]
    Attributes
    protected
  27. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Molecule

Inherited from AnyRef

Inherited from Any

internal

Ungrouped