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cassandraHelpers.go
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/
cassandraHelpers.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 cassandra
import (
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/uber/cadence/common/auth"
"github.com/gocql/gocql"
log "github.com/sirupsen/logrus"
"github.com/uber/cadence/tools/cassandra"
"github.com/uber/cadence/tools/common/schema"
)
const cassandraPersistenceName = "cassandra"
// CreateCassandraKeyspace creates the keyspace using this session for given replica count
func CreateCassandraKeyspace(s *gocql.Session, keyspace string, replicas int, overwrite bool) (err error) {
// if overwrite flag is set, drop the keyspace and create a new one
if overwrite {
err = DropCassandraKeyspace(s, keyspace)
if err != nil {
log.Error(`drop keyspace error`, err)
return
}
}
err = s.Query(fmt.Sprintf(`CREATE KEYSPACE IF NOT EXISTS %s WITH replication = {
'class' : 'SimpleStrategy', 'replication_factor' : %d}`, keyspace, replicas)).Exec()
if err != nil {
log.Error(`create keyspace error`, err)
return
}
log.WithField(`keyspace`, keyspace).Debug(`created namespace`)
return
}
// DropCassandraKeyspace drops the given keyspace, if it exists
func DropCassandraKeyspace(s *gocql.Session, keyspace string) (err error) {
err = s.Query(fmt.Sprintf("DROP KEYSPACE IF EXISTS %s", keyspace)).Exec()
if err != nil {
log.Error(`drop keyspace error`, err)
return
}
log.WithField(`keyspace`, keyspace).Info(`dropped namespace`)
return
}
// loadCassandraSchema loads the schema from the given .cql files on this keyspace
func loadCassandraSchema(
dir string,
fileNames []string,
hosts []string,
port int,
keyspace string,
override bool,
tls *auth.TLS,
) (err error) {
tmpFile, err := ioutil.TempFile("", "_cadence_")
if err != nil {
return fmt.Errorf("error creating tmp file:%v", err.Error())
}
defer os.Remove(tmpFile.Name())
for _, file := range fileNames {
// Flagged for potential file inclusion via variable. No user supplied input is included here - this just reads
// schema files.
// #nosec
content, err := ioutil.ReadFile(dir + "/" + file)
if err != nil {
return fmt.Errorf("error reading contents of file %v:%v", file, err.Error())
}
_, err = tmpFile.WriteString(string(content) + "\n")
if err != nil {
return fmt.Errorf("error writing string to file, err: %v", err.Error())
}
}
tmpFile.Close()
config := &cassandra.SetupSchemaConfig{
CQLClientConfig: cassandra.CQLClientConfig{
Hosts: strings.Join(hosts, ","),
Port: port,
Keyspace: keyspace,
TLS: tls,
},
SetupConfig: schema.SetupConfig{
SchemaFilePath: tmpFile.Name(),
Overwrite: override,
DisableVersioning: true,
},
}
err = cassandra.SetupSchema(config)
if err != nil {
err = fmt.Errorf("error loading schema:%v", err.Error())
}
return
}