// CreateKeyspace creates a keyspace if necessary
// ks -> keyspace name
// rs -> replication strategy class
// rf -> replication factor
func CreateKeyspace(c *gocql.ClusterConfig, ks string, rs string, rf int) error {
kis, err := GetKeyspaces(c)
if err != nil {
return err
}
kss := set.NewStringSet(kis)
if !kss.Contains(ks) {
log.Printf("Creating keyspace: %v\n", ks)
c.Keyspace = ""
s, err := c.CreateSession()
if err != nil {
return err
}
defer s.Close()
if rs == "" {
rs = "SimpleStrategy"
}
err = s.Query(fmt.Sprintf("CREATE KEYSPACE IF NOT EXISTS %v WITH REPLICATION = {'class': '%v', 'replication_factor': %v};", ks, rs, rf)).Exec()
if err != nil {
return err
}
}
c.Keyspace = ks
return nil
}
// CreateKeyspaceWithNetworkTopologyStrategy creates a keyspace if necesary with NetworkTopologyStrategy
// ks -> keyspace name
// rfmap -> map of datacenter name to replication factor for that DC
func CreateKeyspaceWithNetworkTopologyStrategy(c *gocql.ClusterConfig, ks string, rfmap map[string]uint) error {
kis, err := GetKeyspaces(c)
if err != nil {
return err
}
kss := set.NewStringSet(kis)
if !kss.Contains(ks) {
log.Printf("Creating keyspace: %v\n", ks)
c.Keyspace = ""
s, err := c.CreateSession()
if err != nil {
return err
}
defer s.Close()
q := fmt.Sprintf("CREATE KEYSPACE IF NOT EXISTS %v WITH REPLICATION = {'class': '%v', ", ks, "NetworkTopologyStrategy")
rfsl := []string{}
for dc, rf := range rfmap {
rfsl = append(rfsl, fmt.Sprintf("'%v' : %v", dc, rf))
}
q = fmt.Sprintf("%v%v};", q, strings.Join(rfsl, ", "))
err = s.Query(q).Exec()
if err != nil {
return err
}
}
c.Keyspace = ks
return nil
}
func prepareCassandraCluster(cluster *gocql.ClusterConfig) {
cluster.Keyspace = "system"
session, err := cluster.CreateSession()
if err != nil {
panic(err)
}
defer session.Close()
err = session.Query("DROP KEYSPACE IF EXISTS ?", cassandraKeyspace).RetryPolicy(nil).Exec()
if err != nil {
panic(err)
}
err = session.Query("DROP KEYSPACE IF EXISTS ?", cassandraKeyspace).RetryPolicy(nil).Exec()
if err != nil {
panic(err)
}
err = session.Query("CREATE KEYSPACE ? WITH replication = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 }", cassandraKeyspace).RetryPolicy(nil).Exec()
if err != nil {
panic(err)
}
err = session.Query("CREATE TABLE ?.kvbench (id UUID primary key, value varchar)", cassandraKeyspace).RetryPolicy(nil).Exec()
if err != nil {
panic(err)
}
}
// DropKeyspace deletes a keyspace and all data associated with it
func DropKeyspace(c *gocql.ClusterConfig, ks string) error {
c.Keyspace = ""
s, err := c.CreateSession()
if err != nil {
return err
}
defer s.Close()
log.Printf("Dropping keyspace: %v\n", ks)
err = s.Query(fmt.Sprintf("DROP KEYSPACE IF EXISTS %v\n", ks)).Exec()
if err != nil {
return err
}
return nil
}