Your own query language

Person.name.age.Address.street

("Lisa", 20, "Broadway")

obj.name           = "Lisa"
obj.age            = 20
obj.Address.street = "Broadway"

Learn More Get Started Show code

Your Data Model =>
Your Query Language

Molecule is a Scala eco-system to define your domain Data Model and use that as your query language.

Use your Data Model attributes to build molecules of data structures that you can transact and query against the powerful Datomic® database.

Model

trait Person {
  val name    = oneString
  val age     = oneInt
  val address = one[Address]
}
trait Address {
  val street = oneString
}

Transact

Person.name.age.Address.street insert
  List(
    ("Lisa", 20, "Broadway"),
    ("John", 24, "5th Avenue")
  )

Query

Person.name.age.Address.street.get ===
  List(
    ("Lisa", 20, "Broadway"),
    ("John", 24, "5th Avenue")
  )

Same molecules for multiple dbs

Transact and query your molecules uniformly against any of the three Datomic database systems: Peer, Peer-Server and Cloud.

Your molecules

⇅

Datomic
Peer

On-prem

Peer in application process

Datomic
Peer-Server

Remote Peer via http

Like traditional db server

Datomic
Cloud

Distributed AWS Cloud system

Testable with dev-Local

m	Molecule
	Typesafe Scala meta-DSL for Datomic Intuitively use your domain terms as query tokens Sync/Async APIs Model any RDBMS, Graph, Document, KV-store etc. Datalog queries for Datomic built at compile time Automatic Query optimization (Molecule is not affiliated with Datomic) Read more...

	Datomic®
	Datomic official website Fully transactional, cloud-ready, distributed database Elastic scaling Built-in caching - extremely low latency Built-in auditing - query entire history of data ACID-compliant transactions Flexible and sound Data Model

Type-inferred Queries

Build query molecules with your domain attributes

val persons: List[(String, Int)] = Person.name.age.get

“Name and age of Persons”

Relationships

Pick attributes across namespaces

Person.name.age.Address.street.Country.name.get

“Name, age, street and country of residence”

Conditional values

Apply required values for certain attributes

Person.name("Johnson").age.Address.City.name("New York").get

“Age of Johnsons in New York” - name, age and city returned

Control output

Add an underscore to omit an attribute from the result set:

Person.name_("Johnson").age.Address.City.name_("New York").get

“Age of Johnsons in New York” - only ages returned

Logic and ranges

Apply logical options and ranges

Person.name("Dean" or "Johnson").age.<(25).Address.Country.iso2("US").get

“Young Dean and Johnsons in the US”

Insert multi-level data

Save data for multiple namespace levels in one go:

Person.name("Johnson").age(35).Address.street("5th").City.name("New York").save

“Add a 35-year-old Johnson living on 5th street in New York”

Update data

Update molecules with new data

Person(johnsonId).Address.street("Broadway").update

“Johnson now lives on Broadway”

Try demo

git clone https://github.com/scalamolecule/molecule-demo.git
Open in your IDE
Run app - and build new molecules…

Introduction to Molecule
Setup your Molecule project
See Code examples