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|
package resources
import (
"github.com/mesos/mesos-go/api/v1/lib"
"github.com/mesos/mesos-go/api/v1/lib/resourcefilters"
)
func Find(wants mesos.Resources, from ...mesos.Resource) (total mesos.Resources) {
for i := range wants {
found := find(wants[i], from...)
// each want *must* be found
if len(found) == 0 {
return nil
}
total.Add(found...)
}
return total
}
func find(want mesos.Resource, from ...mesos.Resource) mesos.Resources {
var (
total = mesos.Resources(from).Clone()
remaining = mesos.Resources(Flatten(mesos.Resources{want}))
found mesos.Resources
predicates = resourcefilters.Filters{
resourcefilters.ReservedByRole(want.GetRole()),
resourcefilters.Unreserved,
resourcefilters.Any,
}
)
for _, predicate := range predicates {
filtered := resourcefilters.Select(predicate, total...)
for i := range filtered {
// need to flatten to ignore the roles in ContainsAll()
flattened := Flatten(mesos.Resources{filtered[i]})
if ContainsAll(flattened, remaining) {
// want has been found, return the result
return found.Add(Flatten(
remaining,
Role(filtered[i].GetRole()).Assign(),
filtered[i].Reservation.Assign())...,
)
}
if ContainsAll(remaining, flattened) {
found.Add1(filtered[i])
total.Subtract1(filtered[i])
remaining.Subtract(flattened...)
break
}
}
}
return nil
}
|
