/
oracle_gtid_set_entry.go
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/
oracle_gtid_set_entry.go
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/*
Copyright 2015 Shlomi Noach, courtesy Booking.com
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package inst
import (
"fmt"
"regexp"
"strconv"
"strings"
)
var (
singleValueInterval = regexp.MustCompile("^([0-9]+)$")
multiValueInterval = regexp.MustCompile("^([0-9]+)[-]([0-9]+)$")
)
// OracleGtidSetEntry represents an entry in a set of GTID ranges,
// for example, the entry: "316d193c-70e5-11e5-adb2-ecf4bb2262ff:1-8935:8984-6124596" (may include gaps)
type OracleGtidSetEntry struct {
UUID string
Ranges string
}
// NewOracleGtidSetEntry parses a single entry text
func NewOracleGtidSetEntry(gtidRangeString string) (*OracleGtidSetEntry, error) {
gtidRangeString = strings.TrimSpace(gtidRangeString)
tokens := strings.SplitN(gtidRangeString, ":", 2)
if len(tokens) != 2 {
return nil, fmt.Errorf("Cannot parse OracleGtidSetEntry from %s", gtidRangeString)
}
if tokens[0] == "" {
return nil, fmt.Errorf("Unexpected UUID: %s", tokens[0])
}
if tokens[1] == "" {
return nil, fmt.Errorf("Unexpected GTID range: %s", tokens[1])
}
gtidRange := &OracleGtidSetEntry{UUID: tokens[0], Ranges: tokens[1]}
return gtidRange, nil
}
// String returns a user-friendly string representation of this entry
func (this *OracleGtidSetEntry) String() string {
return fmt.Sprintf("%s:%s", this.UUID, this.Ranges)
}
// String returns a user-friendly string representation of this entry
func (this *OracleGtidSetEntry) Explode() (result [](*OracleGtidSetEntry)) {
intervals := strings.Split(this.Ranges, ":")
for _, interval := range intervals {
if submatch := multiValueInterval.FindStringSubmatch(interval); submatch != nil {
intervalStart, _ := strconv.Atoi(submatch[1])
intervalEnd, _ := strconv.Atoi(submatch[2])
for i := intervalStart; i <= intervalEnd; i++ {
result = append(result, &OracleGtidSetEntry{UUID: this.UUID, Ranges: fmt.Sprintf("%d", i)})
}
} else if submatch := singleValueInterval.FindStringSubmatch(interval); submatch != nil {
result = append(result, &OracleGtidSetEntry{UUID: this.UUID, Ranges: interval})
}
}
return result
}