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aliaslist.go
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/
aliaslist.go
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/* Copyright 2022 Zinc Labs Inc. and Contributors
*
* 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 core
import (
"sync"
"github.com/rs/zerolog/log"
"github.com/zincsearch/zincsearch/pkg/metadata"
"github.com/zincsearch/zincsearch/pkg/zutils"
)
var ZINC_INDEX_ALIAS_LIST AliasList
type AliasList struct {
lock sync.RWMutex
Aliases map[string][]string
}
func NewAliasList() *AliasList {
return &AliasList{Aliases: map[string][]string{}}
}
func (al *AliasList) AddIndexesToAlias(alias string, indexes []string) error {
al.lock.Lock()
al.Aliases[alias] = append(al.Aliases[alias], indexes...)
err := metadata.Alias.Set(al.Aliases)
if err != nil {
log.Err(err).Msg("failed to save alias in metadata after add operation")
al.lock.Unlock()
return err
}
al.lock.Unlock()
return nil
}
func (al *AliasList) RemoveIndexesFromAlias(alias string, removeIndexes []string) error {
al.lock.Lock()
indexes, ok := al.Aliases[alias]
if !ok {
al.lock.Unlock()
return nil
}
removeIndexesMap := make(map[string]bool)
for _, index := range removeIndexes {
removeIndexesMap[index] = true
}
lastIndex := len(indexes)
for i := 0; i < lastIndex; i++ {
if _, ok := removeIndexesMap[indexes[i]]; ok {
indexes[lastIndex-1], indexes[i] = indexes[i], indexes[lastIndex-1]
i--
lastIndex--
}
}
al.Aliases[alias] = indexes[:lastIndex]
err := metadata.Alias.Set(al.Aliases)
if err != nil {
log.Err(err).Msg("failed to save alias in metadata after remove operation")
al.lock.Unlock()
return err
}
al.lock.Unlock()
return nil
}
func (al *AliasList) GetIndexesForAlias(aliasName string) ([]string, bool) {
al.lock.RLock()
idx, ok := al.Aliases[aliasName]
if !ok {
al.lock.RUnlock()
return nil, false
}
v := make([]string, len(idx))
copy(v, idx)
al.lock.RUnlock()
return v, ok
}
func (al *AliasList) GetAliasesForIndex(indexName string) []string {
al.lock.RLock()
var aliases []string
for alias, indexes := range al.Aliases {
if zutils.SliceExists(indexes, indexName) {
aliases = append(aliases, alias)
}
}
al.lock.RUnlock()
return aliases
}
type M map[string]interface{}
// GetAliasMap returns an ES compatible map of indexes to their aliases
// In the form:
//
// {"gitea_issues":{"aliases":{}},"gitea_codes.v1":{"aliases":{"gitea_codes":{}}}}
func (al *AliasList) GetAliasMap(targetIndexes, targetAliases []string) M {
al.lock.RLock()
top := M{}
outerLoop:
for alias, indexes := range al.Aliases {
if len(targetAliases) > 0 && !zutils.SliceExists(targetAliases, alias) { // check if this is one of the aliased we're looking for
continue outerLoop
}
innerLoop:
for _, index := range indexes {
if len(targetIndexes) > 0 && !zutils.SliceExists(targetIndexes, index) { // check if this is one of the indexes we're looking for
continue innerLoop
}
indexMap, _ := top[index].(M)
if indexMap == nil {
indexMap = M{}
top[index] = indexMap
}
aliases, _ := indexMap["aliases"].(M)
if aliases == nil {
aliases = M{}
indexMap["aliases"] = aliases
}
aliases[alias] = struct{}{}
}
}
al.lock.RUnlock()
return top
}