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starter.go
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starter.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 failovermanager
import (
"context"
"github.com/opentracing/opentracing-go"
"github.com/uber-go/tally"
"go.uber.org/cadence/.gen/go/cadence/workflowserviceclient"
"go.uber.org/cadence/activity"
"go.uber.org/cadence/worker"
"go.uber.org/cadence/workflow"
"github.com/uber/cadence/client"
"github.com/uber/cadence/common"
"github.com/uber/cadence/common/cluster"
"github.com/uber/cadence/common/dynamicconfig"
"github.com/uber/cadence/common/log"
"github.com/uber/cadence/common/log/tag"
"github.com/uber/cadence/common/metrics"
)
type (
// Config defines the configuration for failover
Config struct {
AdminOperationToken dynamicconfig.StringPropertyFn
// ClusterMetadata contains the metadata for this cluster
ClusterMetadata cluster.Metadata
}
// BootstrapParams contains the set of params needed to bootstrap
// failover manager
BootstrapParams struct {
// Config contains the configuration for scanner
Config Config
// ServiceClient is an instance of cadence service client
ServiceClient workflowserviceclient.Interface
// MetricsClient is an instance of metrics object for emitting stats
MetricsClient metrics.Client
Logger log.Logger
// TallyScope is an instance of tally metrics scope
TallyScope tally.Scope
// ClientBean is an instance of client.Bean for a collection of clients
ClientBean client.Bean
}
// FailoverManager of cadence worker service
FailoverManager struct {
cfg Config
svcClient workflowserviceclient.Interface
clientBean client.Bean
metricsClient metrics.Client
tallyScope tally.Scope
logger log.Logger
worker worker.Worker
}
)
// New returns a new instance of FailoverManager
func New(params *BootstrapParams) *FailoverManager {
return &FailoverManager{
cfg: params.Config,
svcClient: params.ServiceClient,
metricsClient: params.MetricsClient,
tallyScope: params.TallyScope,
logger: params.Logger.WithTags(tag.ComponentBatcher),
clientBean: params.ClientBean,
}
}
// Start starts the worker
func (s *FailoverManager) Start() error {
ctx := context.WithValue(context.Background(), failoverManagerContextKey, s)
workerOpts := worker.Options{
MetricsScope: s.tallyScope,
BackgroundActivityContext: ctx,
Tracer: opentracing.GlobalTracer(),
}
failoverWorker := worker.New(s.svcClient, common.SystemLocalDomainName, TaskListName, workerOpts)
failoverWorker.RegisterWorkflowWithOptions(FailoverWorkflow, workflow.RegisterOptions{Name: FailoverWorkflowTypeName})
failoverWorker.RegisterWorkflowWithOptions(RebalanceWorkflow, workflow.RegisterOptions{Name: RebalanceWorkflowTypeName})
failoverWorker.RegisterActivityWithOptions(FailoverActivity, activity.RegisterOptions{Name: failoverActivityName})
failoverWorker.RegisterActivityWithOptions(GetDomainsActivity, activity.RegisterOptions{Name: getDomainsActivityName})
failoverWorker.RegisterActivityWithOptions(GetDomainsForRebalanceActivity, activity.RegisterOptions{Name: getRebalanceDomainsActivityName})
s.worker = failoverWorker
return failoverWorker.Start()
}
// Stop stops the worker
func (s *FailoverManager) Stop() {
s.worker.Stop()
}