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resource.go
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resource.go
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package strive
import (
"errors"
"github.com/gogo/protobuf/proto"
)
type Resources map[*Resource]struct{}
func NewResources(slice []*Resource) Resources {
ret := make(Resources)
for _, res := range slice {
ret.Add(res)
}
return ret
}
func (r Resources) Dup() Resources {
ret := make(Resources)
for res, _ := range r {
ret.Add(res)
}
return ret
}
func (r Resources) Find(t Resource_ResourceType) (*Resource, bool) {
for res, _ := range r {
if res.GetType() == t {
return res, true
}
}
return nil, false
}
func (r Resources) FindAll(t Resource_ResourceType) []*Resource {
var out []*Resource
for res, _ := range r {
if res.GetType() == t {
out = append(out, res)
}
}
return out
}
func (r Resources) Replace(orig, cur *Resource) {
delete(r, orig)
r[cur] = struct{}{}
}
func (r Resources) Add(res *Resource) {
r[res] = struct{}{}
}
func (r Resources) Remove(res *Resource) {
delete(r, res)
}
func (r Resources) List() []*Resource {
var out []*Resource
for res, _ := range r {
out = append(out, res)
}
return out
}
var ErrUnableToRemove = errors.New("unable to remove")
func (r *Resource) Remove(o *Resource) (*Resource, error) {
if r.GetType() != o.GetType() {
return nil, ErrUnableToRemove
}
switch r.GetType() {
case Resource_CPU, Resource_MEMORY:
if r.GetValue().GetIntVal() < o.GetValue().GetIntVal() {
return nil, ErrUnableToRemove
}
return &Resource{
Type: r.Type,
Value: NewIntValue(r.GetValue().GetIntVal() - o.GetValue().GetIntVal()),
}, nil
case Resource_PORT:
nr, err := r.GetValue().GetRangeVal().Remove(o.GetValue().GetRangeVal())
if err != nil {
return nil, err
}
return &Resource{
Type: r.Type,
Value: &Value{
ValueType: Value_RANGES.Enum(),
RangeVal: nr,
},
}, nil
}
return nil, ErrUnableToRemove
}
func (r *Resource) StoreOnly() bool {
return r.GetType() == Resource_CUSTOM || r.GetType() == Resource_VOLUME
}
func (r *Range) Over(x *Range) bool {
return x.GetStart() >= r.GetStart() && x.GetEnd() <= r.GetEnd()
}
func (r *Ranges) Remove(x *Ranges) (*Ranges, error) {
var out []*Range
for _, rr := range x.Ranges {
var handled bool
for _, cr := range r.Ranges {
// If the current range doesn't extend completely over the remove
// range, skip it.
if !cr.Over(rr) {
continue
}
handled = true
switch {
case rr.GetStart() == cr.GetStart():
// rr == [1000, 1010], cr == [1000, 2000]
if rr.GetEnd() < cr.GetEnd() {
// out = [1011, 2000]
out = append(out, &Range{
Start: proto.Int64(rr.GetEnd() + 1),
End: cr.End,
})
}
case rr.GetStart() > cr.GetStart():
// rr == [1010, 2000], cr = [1000, 2000]
if rr.GetEnd() == cr.GetEnd() {
out = append(out, &Range{
Start: proto.Int64(cr.GetStart()),
End: proto.Int64(rr.GetStart() - 1),
})
// rr == [1010, 1020], cr == [1000, 2000]
} else {
out = append(out, &Range{
Start: proto.Int64(cr.GetStart()),
End: proto.Int64(rr.GetStart() - 1),
})
out = append(out, &Range{
Start: proto.Int64(rr.GetEnd() + 1),
End: proto.Int64(cr.GetEnd()),
})
}
}
}
// The remove range didn't fit within any current range
if !handled {
return nil, ErrUnableToRemove
}
}
return &Ranges{Ranges: out}, nil
/*
a := r.Ranges[0]
b := x.Ranges[0]
return &Ranges{Ranges: []*Range{{Start: proto.Int64(*b.End + 1), End: a.End}}}
*/
}