frostfs-node/pkg/services/container/announcement/load/route/placement/builder.go

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package placementrouter
import "fmt"
// Prm groups the required parameters of the Builder's constructor.
//
// All values must comply with the requirements imposed on them.
// Passing incorrect parameter values will result in constructor
// failure (error or panic depending on the implementation).
type Prm struct {
// Calculator of the container members.
//
// Must not be nil.
PlacementBuilder PlacementBuilder
}
// Builder represents component that routes used container space
// values between nodes from the container.
//
// For correct operation, Builder must be created using
// the constructor (New) based on the required parameters
// and optional components. After successful creation,
// the Builder is immediately ready to work through API.
type Builder struct {
placementBuilder PlacementBuilder
}
const invalidPrmValFmt = "invalid parameter %s (%T):%v"
func panicOnPrmValue(n string, v interface{}) {
panic(fmt.Sprintf(invalidPrmValFmt, n, v, v))
}
// New creates a new instance of the Builder.
//
// Panics if at least one value of the parameters is invalid.
//
// The created Builder does not require additional
// initialization and is completely ready for work.
func New(prm Prm) *Builder {
switch {
case prm.PlacementBuilder == nil:
panicOnPrmValue("PlacementBuilder", prm.PlacementBuilder)
}
return &Builder{
placementBuilder: prm.PlacementBuilder,
}
}