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timers.go
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timers.go
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// The MIT License (MIT)
//
// Copyright (c) 2017-2020 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 timers
import (
"context"
"strconv"
"time"
"go.uber.org/cadence/client"
"go.uber.org/cadence/workflow"
"github.com/uber/cadence/common/blobstore"
"github.com/uber/cadence/common/cache"
"github.com/uber/cadence/common/dynamicconfig"
"github.com/uber/cadence/common/pagination"
"github.com/uber/cadence/common/persistence"
"github.com/uber/cadence/common/reconciliation/entity"
"github.com/uber/cadence/common/reconciliation/fetcher"
"github.com/uber/cadence/common/reconciliation/invariant"
"github.com/uber/cadence/common/reconciliation/store"
"github.com/uber/cadence/service/worker/scanner/shardscanner"
)
const (
// ScannerWFTypeName defines workflow type name for concrete executions scanner
ScannerWFTypeName = "cadence-sys-timers-scanner-workflow"
wfid = "cadence-sys-timers-scanner"
scannerTaskListName = "cadence-sys-timers-scanner-tasklist-0"
// FixerWFTypeName defines workflow type name for timers fixer
FixerWFTypeName = "cadence-sys-timers-fixer-workflow"
fixerTaskListName = "cadence-sys-timers-fixer-tasklist-0"
fixerwfid = "cadence-sys-timers-fixer"
periodStartKey = "period_start"
periodEndKey = "period_end"
)
// ScannerWorkflow starts timers scanner.
func ScannerWorkflow(
ctx workflow.Context,
params shardscanner.ScannerWorkflowParams,
) error {
wf, err := shardscanner.NewScannerWorkflow(ctx, ScannerWFTypeName, params)
if err != nil {
return err
}
return wf.Start(ctx)
}
// FixerWorkflow starts timers executions fixer.
func FixerWorkflow(
ctx workflow.Context,
params shardscanner.FixerWorkflowParams,
) error {
wf, err := shardscanner.NewFixerWorkflow(ctx, FixerWFTypeName, params)
if err != nil {
return err
}
return wf.Start(ctx)
}
// ScannerHooks provides hooks for timers scanner.
func ScannerHooks() *shardscanner.ScannerHooks {
h, err := shardscanner.NewScannerHooks(Manager, Iterator, Config)
if err != nil {
return nil
}
return h
}
// FixerHooks provides hooks needed for timers fixer.
func FixerHooks() *shardscanner.FixerHooks {
h, err := shardscanner.NewFixerHooks(FixerManager, FixerIterator, timerCustomConfig)
if err != nil {
return nil
}
return h
}
func timerCustomConfig(_ shardscanner.FixerContext) shardscanner.CustomScannerConfig {
// must be non-empty to pass backwards-compat check,
// and this allows safely adding more invariants in the future.
//
// currently this is not read anywhere because "fixer enabled"
// means "run this one invariant's fixes".
return map[string]string{
invariant.TimerInvalidName: "true",
}
}
// Manager provides invariant manager for timers scanner.
func Manager(
_ context.Context,
pr persistence.Retryer,
_ shardscanner.ScanShardActivityParams,
cache cache.DomainCache,
) invariant.Manager {
return invariant.NewInvariantManager(getInvariants(pr, cache))
}
// Iterator provides iterator for timers scanner.
func Iterator(
ctx context.Context,
pr persistence.Retryer,
params shardscanner.ScanShardActivityParams,
) pagination.Iterator {
start, err := strconv.Atoi(params.ScannerConfig[periodStartKey])
if err != nil {
return nil
}
end, err := strconv.Atoi(params.ScannerConfig[periodEndKey])
if err != nil {
return nil
}
startAt := time.Now().Add(time.Hour * time.Duration(start))
endAt := startAt.Add(time.Hour * time.Duration(end))
return fetcher.TimerIterator(ctx, pr, startAt, endAt, params.PageSize)
}
// FixerIterator provides iterator for timers fixer.
func FixerIterator(
ctx context.Context,
client blobstore.Client,
keys store.Keys,
_ shardscanner.FixShardActivityParams,
) store.ScanOutputIterator {
return store.NewBlobstoreIterator(ctx, client, keys, &entity.Timer{})
}
// FixerManager provides invariant manager for timers fixer.
func FixerManager(
_ context.Context,
pr persistence.Retryer,
_ shardscanner.FixShardActivityParams,
cache cache.DomainCache,
) invariant.Manager {
return invariant.NewInvariantManager(getInvariants(pr, cache))
}
// Config resolves dynamic config for timers scanner.
func Config(ctx shardscanner.ScannerContext) shardscanner.CustomScannerConfig {
res := shardscanner.CustomScannerConfig{}
res[periodStartKey] = strconv.Itoa(ctx.Config.DynamicCollection.GetIntProperty(dynamicconfig.TimersScannerPeriodStart)())
res[periodEndKey] = strconv.Itoa(ctx.Config.DynamicCollection.GetIntProperty(dynamicconfig.TimersScannerPeriodEnd)())
return res
}
// ScannerConfig configures timers scanner
func ScannerConfig(dc *dynamicconfig.Collection) *shardscanner.ScannerConfig {
return &shardscanner.ScannerConfig{
ScannerWFTypeName: ScannerWFTypeName,
FixerWFTypeName: FixerWFTypeName,
DynamicParams: shardscanner.DynamicParams{
ScannerEnabled: dc.GetBoolProperty(dynamicconfig.TimersScannerEnabled),
FixerEnabled: dc.GetBoolProperty(dynamicconfig.TimersFixerEnabled),
Concurrency: dc.GetIntProperty(dynamicconfig.TimersScannerConcurrency),
PageSize: dc.GetIntProperty(dynamicconfig.TimersScannerPersistencePageSize),
BlobstoreFlushThreshold: dc.GetIntProperty(dynamicconfig.TimersScannerBlobstoreFlushThreshold),
ActivityBatchSize: dc.GetIntProperty(dynamicconfig.TimersScannerActivityBatchSize),
AllowDomain: dc.GetBoolPropertyFilteredByDomain(dynamicconfig.TimersFixerDomainAllow),
},
DynamicCollection: dc,
ScannerHooks: ScannerHooks,
FixerHooks: FixerHooks,
StartWorkflowOptions: client.StartWorkflowOptions{
ID: wfid,
TaskList: scannerTaskListName,
ExecutionStartToCloseTimeout: 20 * 365 * 24 * time.Hour,
WorkflowIDReusePolicy: client.WorkflowIDReusePolicyAllowDuplicate,
CronSchedule: "* * * * *",
},
StartFixerOptions: client.StartWorkflowOptions{
ID: fixerwfid,
TaskList: fixerTaskListName,
ExecutionStartToCloseTimeout: 20 * 365 * 24 * time.Hour,
WorkflowIDReusePolicy: client.WorkflowIDReusePolicyAllowDuplicate,
CronSchedule: "* * * * *",
},
}
}
func getInvariants(pr persistence.Retryer, cache cache.DomainCache) []invariant.Invariant {
return []invariant.Invariant{
invariant.NewTimerInvalid(pr, cache),
}
}