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pollerHistory.go
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/
pollerHistory.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package matching
import (
"sort"
"time"
"github.com/uber/cadence/common"
"github.com/uber/cadence/common/cache"
"github.com/uber/cadence/common/types"
)
const (
pollerHistoryInitSize = 0
pollerHistoryInitMaxSize = 5000
pollerHistoryTTL = 5 * time.Minute
)
type (
pollerIdentity string
pollerInfo struct {
ratePerSecond *float64
isolationGroup string
}
)
type pollerHistory struct {
// poller ID -> pollerInfo
// pollers map[pollerID]pollerInfo
history cache.Cache
// OnHistoryUpdatedFunc is a function called when the poller history was updated
onHistoryUpdatedFunc HistoryUpdatedFunc
}
// HistoryUpdatedFunc is a type for notifying applications when the poller history was updated
type HistoryUpdatedFunc func()
func newPollerHistory(historyUpdatedFunc HistoryUpdatedFunc) *pollerHistory {
opts := &cache.Options{
InitialCapacity: pollerHistoryInitSize,
TTL: pollerHistoryTTL,
Pin: false,
MaxCount: pollerHistoryInitMaxSize,
}
return &pollerHistory{
history: cache.New(opts),
onHistoryUpdatedFunc: historyUpdatedFunc,
}
}
func (pollers *pollerHistory) updatePollerInfo(id pollerIdentity, info pollerInfo) {
pollers.history.Put(id, &info)
if pollers.onHistoryUpdatedFunc != nil {
pollers.onHistoryUpdatedFunc()
}
}
func (pollers *pollerHistory) getPollerInfo(earliestAccessTime time.Time) []*types.PollerInfo {
var result []*types.PollerInfo
ite := pollers.history.Iterator()
defer ite.Close()
for ite.HasNext() {
entry := ite.Next()
key := entry.Key().(pollerIdentity)
value := entry.Value().(*pollerInfo)
// TODO add IP, T1396795
lastAccessTime := entry.CreateTime()
if earliestAccessTime.Before(lastAccessTime) {
rps := _defaultTaskDispatchRPS
if value.ratePerSecond != nil {
rps = *value.ratePerSecond
}
result = append(result, &types.PollerInfo{
Identity: string(key),
LastAccessTime: common.Int64Ptr(lastAccessTime.UnixNano()),
RatePerSecond: rps,
})
}
}
return result
}
func (pollers *pollerHistory) getPollerIsolationGroups(earliestAccessTime time.Time) []string {
groupSet := make(map[string]struct{})
ite := pollers.history.Iterator()
defer ite.Close()
for ite.HasNext() {
entry := ite.Next()
value := entry.Value().(*pollerInfo)
lastAccessTime := entry.CreateTime()
if earliestAccessTime.Before(lastAccessTime) {
if value.isolationGroup != "" {
groupSet[value.isolationGroup] = struct{}{}
}
}
}
result := make([]string, 0, len(groupSet))
for k := range groupSet {
result = append(result, k)
}
sort.Strings(result)
return result
}