forked from ghetzel/pivot
/
fs-indexer.go
183 lines (153 loc) · 4.83 KB
/
fs-indexer.go
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package backends
import (
"github.com/PerformLine/go-stockutil/sliceutil"
"github.com/PerformLine/go-stockutil/stringutil"
"github.com/PerformLine/pivot/v3/dal"
"github.com/PerformLine/pivot/v3/filter"
)
func (self *FilesystemBackend) IndexConnectionString() *dal.ConnectionString {
return &dal.ConnectionString{}
}
func (self *FilesystemBackend) IndexInitialize(_ Backend) error {
return nil
}
func (self *FilesystemBackend) GetBackend() Backend {
return self
}
func (self *FilesystemBackend) IndexExists(collection *dal.Collection, id interface{}) bool {
return self.Exists(collection.GetIndexName(), id)
}
func (self *FilesystemBackend) IndexRetrieve(collection *dal.Collection, id interface{}) (*dal.Record, error) {
defer stats.NewTiming().Send(`pivot.indexers.filesystem.retrieve_time`)
return self.Retrieve(collection.GetIndexName(), id)
}
func (self *FilesystemBackend) IndexRemove(collection *dal.Collection, ids []interface{}) error {
return nil
}
func (self *FilesystemBackend) Index(collection *dal.Collection, records *dal.RecordSet) error {
return nil
}
func (self *FilesystemBackend) QueryFunc(collection *dal.Collection, filter *filter.Filter, resultFn IndexResultFunc) error {
defer stats.NewTiming().Send(`pivot.indexers.filesystem.query_time`)
querylog.Debugf("[%T] Query using filter %q", self, filter.String())
if filter.IdOnly() {
if id, ok := filter.GetFirstValue(); ok {
if record, err := self.Retrieve(collection.GetIndexName(), id); err == nil {
querylog.Debugf("[%T] Record %v matches filter %q", self, id, filter.String())
if err := resultFn(record, err, IndexPage{
Page: 1,
TotalPages: 1,
Limit: filter.Limit,
Offset: 0,
TotalResults: 1,
}); err != nil {
return err
}
} else {
return err
}
}
} else {
if ids, err := self.listObjectIdsInCollection(collection); err == nil {
page := 1
processed := 0
offset := filter.Offset
for _, id := range ids {
// retrieve the record by id
if record, err := self.Retrieve(collection.Name, id); err == nil {
record.ID = stringutil.Autotype(record.ID)
// if matching all records OR the found record matches the filter
if filter.MatchesRecord(record) {
if processed >= offset {
querylog.Debugf("[%T] Record %v matches filter %q", self, record.ID, filter.String())
if err := resultFn(record, err, IndexPage{
Page: page,
TotalPages: 1,
Limit: filter.Limit,
Offset: offset,
TotalResults: -1,
}); err != nil {
return err
}
}
}
} else {
if err := resultFn(dal.NewRecord(nil), err, IndexPage{
Page: page,
TotalPages: 1,
Limit: filter.Limit,
Offset: offset,
TotalResults: -1,
}); err != nil {
return err
}
}
processed += 1
page = int(float64(processed) / float64(filter.Limit))
if filter.Limit > 0 && processed >= (offset+filter.Limit) {
querylog.Debugf("[%T] %d at or beyond limit %d, returning results", self, processed, filter.Limit)
break
}
}
} else {
return err
}
}
return nil
}
func (self *FilesystemBackend) Query(collection *dal.Collection, f *filter.Filter, resultFns ...IndexResultFunc) (*dal.RecordSet, error) {
return DefaultQueryImplementation(self, collection, f, resultFns...)
}
func (self *FilesystemBackend) ListValues(collection *dal.Collection, fields []string, f *filter.Filter) (map[string][]interface{}, error) {
values := make(map[string][]interface{})
if err := self.QueryFunc(collection, f, func(record *dal.Record, err error, page IndexPage) error {
if err == nil {
for _, field := range fields {
var v []interface{}
switch field {
case collection.IdentityField:
field = collection.IdentityField
if current, ok := values[field]; ok {
v = current
} else {
v = make([]interface{}, 0)
}
if record.ID != nil {
v = sliceutil.Unique(append(v, record.ID))
}
default:
if current, ok := values[field]; ok {
v = current
} else {
v = make([]interface{}, 0)
}
if newV := record.Get(field); newV != nil {
v = sliceutil.Unique(append(v, newV))
}
}
values[field] = v
}
}
return nil
}); err == nil {
return values, nil
} else {
return values, err
}
}
func (self *FilesystemBackend) DeleteQuery(collection *dal.Collection, f *filter.Filter) error {
idsToRemove := make([]interface{}, 0)
if err := self.QueryFunc(collection, f, func(record *dal.Record, err error, page IndexPage) error {
if err == nil {
idsToRemove = append(idsToRemove, record.ID)
}
return nil
}); err == nil {
return self.Delete(collection.Name, idsToRemove...)
} else {
return err
}
}
func (self *FilesystemBackend) FlushIndex() error {
return nil
}