136 lines
2.8 KiB
Go
136 lines
2.8 KiB
Go
package zoopb
|
|
|
|
// this is becoming a standard format
|
|
// todo: autogenerate this from the .proto file?
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"sort"
|
|
sync "sync"
|
|
"time"
|
|
)
|
|
|
|
// bad global lock until I figure out some other plan
|
|
var machinesLock sync.RWMutex
|
|
|
|
type MachineIterator struct {
|
|
sync.RWMutex
|
|
|
|
packs []*Machine
|
|
index int
|
|
}
|
|
|
|
// NewMachineIterator initializes a new iterator.
|
|
func NewMachineIterator(packs []*Machine) *MachineIterator {
|
|
return &MachineIterator{packs: packs}
|
|
}
|
|
|
|
// Scan moves to the next element and returns false if there are no more packs.
|
|
func (it *MachineIterator) Scan() bool {
|
|
if it.index >= len(it.packs) {
|
|
return false
|
|
}
|
|
it.index++
|
|
return true
|
|
}
|
|
|
|
// Machine returns the current repo.
|
|
func (it *MachineIterator) Machine() *Machine {
|
|
if it.packs[it.index-1] == nil {
|
|
for i, d := range it.packs {
|
|
fmt.Println("i =", i, d)
|
|
}
|
|
fmt.Println("len =", len(it.packs))
|
|
fmt.Println("repo == nil", it.index, it.index-1)
|
|
os.Exit(-1)
|
|
}
|
|
return it.packs[it.index-1]
|
|
}
|
|
|
|
// Use Scan() in a loop, similar to a while loop
|
|
//
|
|
// for iterator.Scan() {
|
|
// d := iterator.Machine()
|
|
// fmt.Println("Machine UUID:", d.Uuid)
|
|
// }
|
|
|
|
func (r *Machines) All() *MachineIterator {
|
|
repoPointers := r.selectAllMachines()
|
|
|
|
iterator := NewMachineIterator(repoPointers)
|
|
return iterator
|
|
}
|
|
|
|
func (r *Machines) SortByName() *MachineIterator {
|
|
packs := r.selectAllMachines()
|
|
|
|
sort.Sort(ByMachineName(packs))
|
|
|
|
iterator := NewMachineIterator(packs)
|
|
return iterator
|
|
}
|
|
|
|
// enforces no duplicate package names
|
|
func (r *Machines) Append(newP *Machine) bool {
|
|
machinesLock.Lock()
|
|
defer machinesLock.Unlock()
|
|
|
|
for _, p := range r.Machines {
|
|
if p.Hostname == newP.Hostname {
|
|
return false
|
|
}
|
|
}
|
|
|
|
r.Machines = append(r.Machines, newP)
|
|
return true
|
|
}
|
|
|
|
// returns time.Duration since last Update()
|
|
func (r *Machine) Age(newP *Machine) time.Duration {
|
|
t := time.Since(r.Laststamp.AsTime())
|
|
return t
|
|
}
|
|
|
|
// find a package by name
|
|
func (r *Machines) FindByName(name string) *Machine {
|
|
machinesLock.RLock()
|
|
defer machinesLock.RUnlock()
|
|
|
|
for _, p := range r.Machines {
|
|
if p.Hostname == name {
|
|
return p
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (r *Machines) Len() int {
|
|
machinesLock.RLock()
|
|
defer machinesLock.RUnlock()
|
|
|
|
return len(r.Machines)
|
|
}
|
|
|
|
type ByMachineName []*Machine
|
|
|
|
func (a ByMachineName) Len() int { return len(a) }
|
|
func (a ByMachineName) Less(i, j int) bool { return a[i].Hostname < a[j].Hostname }
|
|
func (a ByMachineName) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
|
|
|
|
// safely returns a slice of pointers to the Machine protobufs
|
|
func (r *Machines) selectAllMachines() []*Machine {
|
|
machinesLock.RLock()
|
|
defer machinesLock.RUnlock()
|
|
|
|
// Create a new slice to hold pointers to each Machine
|
|
var allPacks []*Machine
|
|
allPacks = make([]*Machine, len(r.Machines))
|
|
for i, p := range r.Machines {
|
|
allPacks[i] = p // Copy pointers for safe iteration
|
|
}
|
|
|
|
return allPacks
|
|
}
|