80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package client
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import (
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"fmt"
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"math/rand"
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"time"
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"github.com/hashicorp/nomad/nomad/structs"
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)
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// diffResult is used to return the sets that result from a diff
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type diffResult struct {
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added []*structs.Allocation
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removed []string
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updated []*structs.Allocation
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ignore []string
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}
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func (d *diffResult) GoString() string {
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return fmt.Sprintf("allocs: (added %d) (removed %d) (updated %d) (ignore %d)",
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len(d.added), len(d.removed), len(d.updated), len(d.ignore))
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}
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// diffAllocs is used to diff the existing and updated allocations
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// to see what has happened.
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func diffAllocs(existing map[string]uint64, allocs *allocUpdates) *diffResult {
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// Scan the existing allocations
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result := &diffResult{}
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for existID, existIndex := range existing {
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// Check if the alloc was updated or filtered because an update wasn't
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// needed.
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alloc, pulled := allocs.pulled[existID]
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_, filtered := allocs.filtered[existID]
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// If not updated or filtered, removed
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if !pulled && !filtered {
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result.removed = append(result.removed, existID)
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continue
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}
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// Check for an update
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if pulled && alloc.AllocModifyIndex > existIndex {
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result.updated = append(result.updated, alloc)
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continue
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}
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// Ignore this
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result.ignore = append(result.ignore, existID)
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}
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// Scan the updated allocations for any that are new
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for id, pulled := range allocs.pulled {
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if _, ok := existing[id]; !ok {
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result.added = append(result.added, pulled)
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}
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}
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return result
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}
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// shuffleStrings randomly shuffles the list of strings
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func shuffleStrings(list []string) {
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for i := range list {
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j := rand.Intn(i + 1)
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list[i], list[j] = list[j], list[i]
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}
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}
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// stoppedTimer returns a timer that's stopped and wouldn't fire until
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// it's reset
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func stoppedTimer() *time.Timer {
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timer := time.NewTimer(0)
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if !timer.Stop() {
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<-timer.C
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}
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return timer
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}
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