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timer_queue_failover_processor.go
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timer_queue_failover_processor.go
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// 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 queue
import (
"time"
"github.com/pborman/uuid"
"github.com/uber/cadence/common/log"
"github.com/uber/cadence/common/log/tag"
"github.com/uber/cadence/common/persistence"
"github.com/uber/cadence/service/history/engine"
"github.com/uber/cadence/service/history/shard"
"github.com/uber/cadence/service/history/task"
)
func newTimerQueueFailoverProcessor(
standbyClusterName string,
shardContext shard.Context,
historyEngine engine.Engine,
taskProcessor task.Processor,
taskAllocator TaskAllocator,
taskExecutor task.Executor,
logger log.Logger,
minLevel, maxLevel time.Time,
domainIDs map[string]struct{},
) (updateClusterAckLevelFn, *timerQueueProcessorBase) {
config := shardContext.GetConfig()
options := newTimerQueueProcessorOptions(config, true, true)
currentClusterName := shardContext.GetService().GetClusterMetadata().GetCurrentClusterName()
failoverStartTime := shardContext.GetTimeSource().Now()
failoverUUID := uuid.New()
logger = logger.WithTags(
tag.ClusterName(currentClusterName),
tag.WorkflowDomainIDs(domainIDs),
tag.FailoverMsg("from: "+standbyClusterName),
)
taskFilter := func(taskInfo task.Info) (bool, error) {
timer, ok := taskInfo.(*persistence.TimerTaskInfo)
if !ok {
return false, errUnexpectedQueueTask
}
if notRegistered, err := isDomainNotRegistered(shardContext, timer.DomainID); notRegistered && err == nil {
logger.Info("Domain is not in registered status, skip task in failover timer queue.", tag.WorkflowDomainID(timer.DomainID), tag.Value(taskInfo))
return false, nil
}
return taskAllocator.VerifyFailoverActiveTask(domainIDs, timer.DomainID, timer)
}
maxReadLevelTaskKey := newTimerTaskKey(maxLevel, 0)
updateMaxReadLevel := func() task.Key {
return maxReadLevelTaskKey // this is a const
}
updateClusterAckLevel := func(ackLevel task.Key) error {
return shardContext.UpdateTimerFailoverLevel(
failoverUUID,
shard.TimerFailoverLevel{
StartTime: failoverStartTime,
MinLevel: minLevel,
CurrentLevel: ackLevel.(timerTaskKey).visibilityTimestamp,
MaxLevel: maxLevel,
DomainIDs: domainIDs,
},
)
}
queueShutdown := func() error {
return shardContext.DeleteTimerFailoverLevel(failoverUUID)
}
processingQueueStates := []ProcessingQueueState{
NewProcessingQueueState(
defaultProcessingQueueLevel,
newTimerTaskKey(minLevel, 0),
maxReadLevelTaskKey,
NewDomainFilter(domainIDs, false),
),
}
return updateClusterAckLevel, newTimerQueueProcessorBase(
currentClusterName, // should use current cluster's time when doing domain failover
shardContext,
processingQueueStates,
taskProcessor,
NewLocalTimerGate(shardContext.GetTimeSource()),
options,
updateMaxReadLevel,
updateClusterAckLevel,
nil,
queueShutdown,
taskFilter,
taskExecutor,
logger,
shardContext.GetMetricsClient(),
)
}