func (b *bytesValue) Set(s string) error {
v, err := util.ParseBytes(s)
if err != nil {
return err
}
*b.val = v
b.isSet = true
return nil
}
// newStoreSpec parses the string passed into a --store flag and returns a
// StoreSpec if it is correctly parsed.
// There are four possible fields that can be passed in, comma separated:
// - path=xxx The directory in which to the rocks db instance should be
// located, required unless using a in memory storage.
// - type=mem This specifies that the store is an in memory storage instead of
// an on disk one. mem is currently the only other type available.
// - size=xxx The optional maximum size of the storage. This can be in one of a
// few different formats.
// - 10000000000 -> 10000000000 bytes
// - 20GB -> 20000000000 bytes
// - 20GiB -> 21474836480 bytes
// - 0.02TiB -> 21474836480 bytes
// - 20% -> 20% of the available space
// - 0.2 -> 20% of the available space
// - attrs=xxx:yyy:zzz A colon separated list of optional attributes.
// Note that commas are forbidden within any field name or value.
func newStoreSpec(value string) (StoreSpec, error) {
if len(value) == 0 {
return StoreSpec{}, fmt.Errorf("no value specified")
}
var ss StoreSpec
used := make(map[string]struct{})
for _, split := range strings.Split(value, ",") {
if len(split) == 0 {
continue
}
subSplits := strings.SplitN(split, "=", 2)
var field string
var value string
if len(subSplits) == 1 {
field = "path"
value = subSplits[0]
} else {
field = strings.ToLower(subSplits[0])
value = subSplits[1]
}
if _, ok := used[field]; ok {
return StoreSpec{}, fmt.Errorf("%s field was used twice in store definition", field)
}
used[field] = struct{}{}
if len(field) == 0 {
continue
}
if len(value) == 0 {
return StoreSpec{}, fmt.Errorf("no value specified for %s", field)
}
switch field {
case "path":
if len(value) == 0 {
}
ss.Path = value
case "size":
if len(value) == 0 {
return StoreSpec{}, fmt.Errorf("no size specified")
}
if unicode.IsDigit(rune(value[len(value)-1])) &&
(strings.HasPrefix(value, "0.") || strings.HasPrefix(value, ".")) {
// Value is a percentage without % sign.
var err error
ss.SizePercent, err = strconv.ParseFloat(value, 64)
ss.SizePercent *= 100
if err != nil {
return StoreSpec{}, fmt.Errorf("could not parse store size (%s) %s", value, err)
}
if ss.SizePercent > 100 || ss.SizePercent < 1 {
return StoreSpec{}, fmt.Errorf("store size (%s) must be between 1%% and 100%%", value)
}
} else if strings.HasSuffix(value, "%") {
// Value is a percentage.
var err error
ss.SizePercent, err = strconv.ParseFloat(value[:len(value)-1], 64)
if err != nil {
return StoreSpec{}, fmt.Errorf("could not parse store size (%s) %s", value, err)
}
if ss.SizePercent > 100 || ss.SizePercent < 1 {
return StoreSpec{}, fmt.Errorf("store size (%s) must be between 1%% and 100%%", value)
}
} else {
var err error
ss.SizeInBytes, err = util.ParseBytes(value)
if err != nil {
return StoreSpec{}, fmt.Errorf("could not parse store size (%s) %s", value, err)
}
if ss.SizeInBytes < minimumStoreSize {
return StoreSpec{}, fmt.Errorf("store size (%s) must be larger than %s", value,
util.IBytes(minimumStoreSize))
}
}
case "attrs":
if len(value) == 0 {
return StoreSpec{}, fmt.Errorf("no attributes specified")
}
// Check to make sure there are no duplicate attributes.
attrMap := make(map[string]struct{})
for _, attribute := range strings.Split(value, ":") {
if _, ok := attrMap[attribute]; ok {
return StoreSpec{}, fmt.Errorf("duplicate attribute given for store: %s", attribute)
}
attrMap[attribute] = struct{}{}
}
for attribute := range attrMap {
ss.Attributes.Attrs = append(ss.Attributes.Attrs, attribute)
}
sort.Strings(ss.Attributes.Attrs)
case "type":
if value == "mem" {
ss.InMemory = true
} else {
return StoreSpec{}, fmt.Errorf("%s is not a valid store type", value)
}
default:
return StoreSpec{}, fmt.Errorf("%s is not a valid store field", field)
}
}
if ss.InMemory {
// Only in memory stores don't need a path and require a size.
if ss.Path != "" {
return StoreSpec{}, fmt.Errorf("path specified for in memory store")
}
if ss.SizePercent == 0 && ss.SizeInBytes == 0 {
return StoreSpec{}, fmt.Errorf("size must be specified for an in memory store")
}
} else if ss.Path == "" {
return StoreSpec{}, fmt.Errorf("no path specified")
}
return ss, nil
}