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shardedNosqlStore.go
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/
shardedNosqlStore.go
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// Copyright (c) 2022 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 nosql
import (
"fmt"
"sync"
p "github.com/uber/cadence/common/persistence"
"github.com/uber/cadence/common/config"
"github.com/uber/cadence/common/log"
"github.com/uber/cadence/common/log/tag"
)
type (
// shardedNosqlStore is a store that may have one or more shards
shardedNosqlStore struct {
sync.RWMutex
config config.ShardedNoSQL
dc *p.DynamicConfiguration
logger log.Logger
connectedShards map[string]nosqlStore
defaultShard nosqlStore
shardingPolicy shardingPolicy
}
)
func newShardedNosqlStore(cfg config.ShardedNoSQL, logger log.Logger, dc *p.DynamicConfiguration) (*shardedNosqlStore, error) {
sn := shardedNosqlStore{
config: cfg,
dc: dc,
logger: logger,
}
// Connect to the default shard
defaultShardName := cfg.DefaultShard
store, err := sn.connectToShard(defaultShardName)
if err != nil {
return nil, err
}
sn.defaultShard = *store
sn.connectedShards = map[string]nosqlStore{
defaultShardName: sn.defaultShard,
}
// Parse & validate the sharding policy
sn.shardingPolicy, err = newShardingPolicy(logger, cfg)
if err != nil {
return nil, err
}
return &sn, nil
}
func (sn *shardedNosqlStore) GetStoreShardByHistoryShard(shardID int) (*nosqlStore, error) {
shardName, err := sn.shardingPolicy.getHistoryShardName(shardID)
if err != nil {
return nil, err
}
return sn.getShard(shardName)
}
func (sn *shardedNosqlStore) GetStoreShardByTaskList(domainID string, taskListName string, taskType int) (*nosqlStore, error) {
shardName := sn.shardingPolicy.getTaskListShardName(domainID, taskListName, taskType)
return sn.getShard(shardName)
}
func (sn *shardedNosqlStore) GetDefaultShard() nosqlStore {
return sn.defaultShard
}
func (sn *shardedNosqlStore) Close() {
for name, shard := range sn.connectedShards {
sn.logger.Warn("Closing store shard", tag.StoreShard(name))
shard.Close()
}
}
func (sn *shardedNosqlStore) GetName() string {
return "shardedNosql"
}
func (sn *shardedNosqlStore) getShard(shardName string) (*nosqlStore, error) {
sn.RLock()
shard, found := sn.connectedShards[shardName]
sn.RUnlock()
if found {
return &shard, nil
}
_, ok := sn.config.Connections[shardName]
if !ok {
return nil, &ShardingError{
Message: fmt.Sprintf("Unknown db shard name: %v", shardName),
}
}
sn.Lock()
if shard, ok := sn.connectedShards[shardName]; ok { // read again to double-check
sn.Unlock()
return &shard, nil
}
s, err := sn.connectToShard(shardName)
if err != nil {
return nil, err
}
sn.connectedShards[shardName] = *s
sn.logger.Info("Connected to store shard", tag.StoreShard(shardName))
sn.Unlock()
return s, nil
}
func (sn *shardedNosqlStore) connectToShard(shardName string) (*nosqlStore, error) {
cfg, ok := sn.config.Connections[shardName]
if !ok {
return nil, &ShardingError{
Message: fmt.Sprintf("Unknown db shard name: %v", shardName),
}
}
sn.logger.Info("Connecting to store shard", tag.StoreShard(shardName))
db, err := NewNoSQLDB(cfg.NoSQLPlugin, sn.logger, sn.dc)
if err != nil {
sn.logger.Error("Failed to connect to store shard", tag.StoreShard(shardName), tag.Error(err))
return nil, err
}
shard := nosqlStore{
db: db,
logger: sn.logger,
}
return &shard, nil
}