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db.go
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db.go
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package cql
import (
"fmt"
"github.com/gocql/gocql"
"github.com/scylladb/gocqlx/v2"
"strings"
)
/*
Creation Time: 2020 - Aug - 13
Created by: (ehsan)
Maintainers:
1. Ehsan N. Moosa (E2)
Auditor: Ehsan N. Moosa (E2)
Copyright Ronak Software Group 2020
*/
var (
_Session gocqlx.Session
)
func MustInit(config Config) {
err := Init(config)
if err != nil {
panic(err)
}
}
func Init(config Config) (err error) {
_Session, err = New(config)
return
}
func New(config Config) (gocqlx.Session, error) {
scyllaCluster := gocql.NewCluster(strings.Split(config.Host, ",")...)
scyllaCluster.RetryPolicy = &gocql.ExponentialBackoffRetryPolicy{
NumRetries: config.Retries,
Min: config.RetryMinBackOff,
Max: config.RetryMaxBackOff,
}
scyllaCluster.ConnectTimeout = config.ConnectTimeout
scyllaCluster.Timeout = config.Timeout
scyllaCluster.ReconnectInterval = config.ReconnectInterval
scyllaCluster.DefaultIdempotence = config.DefaultIdempotence
scyllaCluster.QueryObserver = config.QueryObserver
scyllaCluster.Compressor = gocql.SnappyCompressor{}
scyllaCluster.Authenticator = gocql.PasswordAuthenticator{
Username: config.Username,
Password: config.Password,
}
scyllaCluster.PoolConfig.HostSelectionPolicy = gocql.TokenAwareHostPolicy(gocql.RoundRobinHostPolicy())
scyllaCluster.NumConns = config.Concurrency
scyllaCluster.PageSize = config.PageSize
scyllaCluster.WriteCoalesceWaitTime = config.WriteCoalesceWaitTime
if len(config.Keyspace) == 0 {
return gocqlx.Session{}, fmt.Errorf("keyspace is not set")
}
scyllaCluster.QueryObserver = config.QueryObserver
scyllaCluster.Keyspace = config.Keyspace
scyllaCluster.Consistency = config.Consistency
scyllaCluster.SerialConsistency = config.SerialConsistency
scyllaCluster.CQLVersion = config.CqlVersion
session, err := scyllaCluster.CreateSession()
if err != nil {
return gocqlx.Session{}, err
}
return gocqlx.NewSession(session), nil
}
func Session() gocqlx.Session {
return _Session
}
func Exec(q *gocqlx.Queryx) error {
return q.Exec()
}
func Scan(q *gocqlx.Queryx, dest ...interface{}) error {
return q.Scan(dest...)
}
func Get(q *gocqlx.Queryx, dest interface{}) error {
return q.Get(dest)
}
func Select(q *gocqlx.Queryx, dest interface{}) error {
return q.Select(dest)
}