Engines

Engines are the SDK components that do work on the platform's behalf: evaluating expressions, checking compliance rules, searching market data, and sharing cache and locks between processes. Each engine exposes a small set of methods.

Engine	Class	Use it to
Cache	UserCache	Store and retrieve values between runs, with a timeout.
Lock	UserLock	Make sure only one process at a time runs a piece of code.
Compliance	Compliance	Check a datastore against a list of compliance rules.
Market Data	MarketData	Search securities and their prices, optionally as of a past date.
Expression Engine	Expression	Evaluate expressions against a dictionary of values.

Authentication

Set your API credentials before you call an engine. See Authentication.