ldmigration

const (
	// Serial execution ensures the authoritative read will always complete execution before executing the
	// non-authoritative read.
	Serial ExecutionOrder = "serial"
	// Random execution randomly decides if the authoritative read should execute first or second.
	Random ExecutionOrder = "random"
	// Concurrent executes both reads in separate go routines, and waits until both calls have finished before
	// proceeding.
	Concurrent ExecutionOrder = "concurrent"
)

const (
	// Read denotes a read-related migration operation.
	Read Operation = "read"
	// Write denotes a write-related migration operation.
	Write Operation = "write"
)

const (
	// Old represents the technology source we are migrating away from.
	Old Origin = "old"
	// New represents the technology source we are migrating towards.
	New Origin = "new"
)

const (
	// Off - migration hasn't started, "old" is authoritative for reads and writes
	Off Stage = "off"

	// DualWrite - write to both "old" and "new", "old" is authoritative for reads
	DualWrite Stage = "dualwrite"

	// Shadow - both "new" and "old" versions run with a preference for "old"
	Shadow Stage = "shadow"

	// Live - both "new" and "old" versions run with a preference for "new"
	Live Stage = "live"

	// RampDown - only read from "new", write to "old" and "new"
	RampDown Stage = "rampdown"

	// Complete - migration is done
	Complete Stage = "complete"
)