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replicator.go
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replicator.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 worker
import (
"fmt"
"github.com/uber-common/bark"
"github.com/uber/cadence/client/history"
"github.com/uber/cadence/common/cluster"
"github.com/uber/cadence/common/logging"
"github.com/uber/cadence/common/messaging"
"github.com/uber/cadence/common/metrics"
"github.com/uber/cadence/common/persistence"
)
type (
// Replicator is the processor for replication tasks
Replicator struct {
clusterMetadata cluster.Metadata
domainReplicator DomainReplicator
historyClient history.Client
config *Config
client messaging.Client
processors []*replicationTaskProcessor
logger bark.Logger
metricsClient metrics.Client
}
)
// NewReplicator creates a new replicator for processing replication tasks
func NewReplicator(clusterMetadata cluster.Metadata, metadataManagerV2 persistence.MetadataManager,
historyClient history.Client, config *Config, client messaging.Client, logger bark.Logger,
metricsClient metrics.Client) *Replicator {
logger = logger.WithFields(bark.Fields{
logging.TagWorkflowComponent: logging.TagValueReplicatorComponent,
})
return &Replicator{
clusterMetadata: clusterMetadata,
domainReplicator: NewDomainReplicator(metadataManagerV2, logger),
historyClient: historyClient,
config: config,
client: client,
logger: logger,
metricsClient: metricsClient,
}
}
// Start is called to start replicator
func (r *Replicator) Start() error {
currentClusterName := r.clusterMetadata.GetCurrentClusterName()
for cluster := range r.clusterMetadata.GetAllClusterFailoverVersions() {
if cluster != currentClusterName {
consumerName := getConsumerName(currentClusterName, cluster)
r.processors = append(r.processors, newReplicationTaskProcessor(currentClusterName, cluster, consumerName, r.client,
r.config, r.logger, r.metricsClient, r.domainReplicator, r.historyClient))
}
}
for _, processor := range r.processors {
if err := processor.Start(); err != nil {
return err
}
}
return nil
}
// Stop is called to stop replicator
func (r *Replicator) Stop() {
for _, processor := range r.processors {
processor.Stop()
}
}
func getConsumerName(currentCluster, remoteCluster string) string {
return fmt.Sprintf("%v_consumer_for_%v", currentCluster, remoteCluster)
}