/
cassandraPersistenceClientFactory.go
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/
cassandraPersistenceClientFactory.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 persistence
import (
"github.com/gocql/gocql"
"github.com/uber-common/bark"
"github.com/uber/cadence/common"
"github.com/uber/cadence/common/metrics"
)
type (
cassandraPersistenceClientFactory struct {
session *gocql.Session
metricsClient metrics.Client
logger bark.Logger
}
)
// NewCassandraPersistenceClientFactory is used to create an instance of ExecutionManagerFactory implementation
func NewCassandraPersistenceClientFactory(hosts string, port int, user, password, dc string, keyspace string,
numConns int, logger bark.Logger, metricsClient metrics.Client) (ExecutionManagerFactory, error) {
cluster := common.NewCassandraCluster(hosts, port, user, password, dc)
cluster.Keyspace = keyspace
cluster.ProtoVersion = cassandraProtoVersion
cluster.Consistency = gocql.LocalQuorum
cluster.SerialConsistency = gocql.LocalSerial
cluster.Timeout = defaultSessionTimeout
cluster.NumConns = numConns
session, err := cluster.CreateSession()
if err != nil {
return nil, err
}
return &cassandraPersistenceClientFactory{session: session, logger: logger, metricsClient: metricsClient}, nil
}
// CreateExecutionManager implements ExecutionManagerFactory interface
func (f *cassandraPersistenceClientFactory) CreateExecutionManager(shardID int) (ExecutionManager, error) {
mgr, err := NewCassandraWorkflowExecutionPersistence(shardID, f.session, f.logger)
if err != nil {
return nil, err
}
if f.metricsClient == nil {
return mgr, nil
}
return NewWorkflowExecutionPersistenceClient(mgr, f.metricsClient, f.logger), nil
}
// Close releases the underlying resources held by this object
func (f *cassandraPersistenceClientFactory) Close() {
if f.session != nil {
f.session.Close()
}
}