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dbops.go
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dbops.go
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package database
import (
"github.com/dgraph-io/badger"
"github.com/mohammedzee1000/openshift-cluster-pool/pkg/generic"
)
// TODO make it retry for database stuff
func HandleError(ctx *generic.Context, err error) {
if err != nil {
ctx.Log.Fatal("Database Ops", err, "failed to connect to data source")
}
}
//KeyExistsInKVDB checks if paticular key not in DB
func KeyExistsInKVDB(ctx *generic.Context, key string) bool {
exists := false
db, err := ctx.NewBadgerConnection()
if err != nil {
HandleError(ctx, err)
}
defer db.Close()
err = db.View(func(txn *badger.Txn) error {
_, err1 := txn.Get([]byte(key))
if err1 != nil && err1 != badger.ErrKeyNotFound {
return err1
}
exists = true
return nil
})
HandleError(ctx, err)
return exists
}
//SaveinKVDB saved specified key value pair in database
func SaveinKVDB(ctx *generic.Context, key string, data string) {
db, err := ctx.NewBadgerConnection()
if err != nil {
HandleError(ctx, err)
}
defer db.Close()
err = db.Update(func(txn *badger.Txn) error {
return txn.Set([]byte(key), []byte(data))
})
HandleError(ctx, err)
}
//GetMultipleWithPrefixFromKVDB gets multiple values whose keys match specified prefix in database
func GetMultipleWithPrefixFromKVDB(ctx *generic.Context, keyprefix string) []string {
var values []string
db, err := ctx.NewBadgerConnection()
if err != nil {
HandleError(ctx, err)
}
defer db.Close()
err = db.View(func(txn *badger.Txn) error {
it := txn.NewIterator(badger.DefaultIteratorOptions)
defer it.Close()
prefix := []byte(keyprefix)
for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() {
item := it.Item()
err := item.Value(func(v []byte) error {
values = append(values, string(v))
return nil
})
if err != nil {
return err
}
}
return nil
})
HandleError(ctx, err)
return values
}
//GetExactFromKVDB gets specific value which matches exact string
func GetExactFromKVDB(ctx *generic.Context, key string) string {
var value string
db, err := ctx.NewBadgerConnection()
HandleError(ctx, err)
defer db.Close()
err = db.View(func(txn *badger.Txn) error {
item, err := txn.Get([]byte(key))
if err != nil {
return err
}
return item.Value(func(val []byte) error {
value = string(val)
return nil
})
})
HandleError(ctx, err)
return value
}
//DeleteInKVDB deletes the key specified in database
func DeleteInKVDB(ctx *generic.Context, key string) {
db, err := ctx.NewBadgerConnection()
HandleError(ctx, err)
defer db.Close()
err = db.Update(func(txn *badger.Txn) error {
return txn.Delete([]byte(key))
})
HandleError(ctx, err)
}