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group_instance.go
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/
group_instance.go
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package cluster
import (
"sync/atomic"
"github.com/ds2-lab/infinistore/proxy/lambdastore"
"github.com/ds2-lab/infinistore/proxy/types"
"github.com/mason-leap-lab/go-utils/mapreduce"
)
type GroupIndex interface {
Idx() int
}
type DefaultGroupIndex int
func (i DefaultGroupIndex) Idx() int {
return int(i)
}
func (i *DefaultGroupIndex) Next() DefaultGroupIndex {
return *i + 1
}
func (i *DefaultGroupIndex) NextN(n int) DefaultGroupIndex {
return *i + DefaultGroupIndex(n)
}
type GroupInstance struct {
types.LambdaDeployment
group *Group
idx GroupIndex
disabled bool
retired uint32
}
func (gins *GroupInstance) Idx() int {
return gins.idx.Idx()
}
func (gins *GroupInstance) Instance() *lambdastore.Instance {
ins, _ := gins.LambdaDeployment.(*lambdastore.Instance)
return ins
}
func (gins *GroupInstance) IsRetired() bool {
return atomic.LoadUint32(&gins.retired) == 1
}
func (gins *GroupInstance) Retire() bool {
return atomic.CompareAndSwapUint32(&gins.retired, 0, 1)
}
type GroupInstanceEnumerator struct {
mapreduce.Enumerator
}
func NewGroupInstanceEnumerator(ginstances []*GroupInstance) *GroupInstanceEnumerator {
enumerator, _ := mapreduce.NewEnumerator(ginstances)
return &GroupInstanceEnumerator{Enumerator: enumerator}
}
func (enum *GroupInstanceEnumerator) Instance(i int) *lambdastore.Instance {
return enum.Item(i).(*GroupInstance).Instance()
}