func (udc *UpsideDownCouch) Batch(batch *index.Batch) (err error) {
analysisStart := time.Now()
resultChan := make(chan *index.AnalysisResult, len(batch.IndexOps))
var numUpdates uint64
for _, doc := range batch.IndexOps {
if doc != nil {
numUpdates++
}
}
var detectedUnsafeMutex sync.RWMutex
detectedUnsafe := false
go func() {
sofar := uint64(0)
for _, doc := range batch.IndexOps {
if doc != nil {
sofar++
if sofar > numUpdates {
detectedUnsafeMutex.Lock()
detectedUnsafe = true
detectedUnsafeMutex.Unlock()
return
}
aw := index.NewAnalysisWork(udc, doc, resultChan)
// put the work on the queue
udc.analysisQueue.Queue(aw)
}
}
}()
// retrieve back index rows concurrent with analysis
docBackIndexRowErr := error(nil)
docBackIndexRowCh := make(chan *docBackIndexRow, len(batch.IndexOps))
udc.writeMutex.Lock()
defer udc.writeMutex.Unlock()
go func() {
defer close(docBackIndexRowCh)
// open a reader for backindex lookup
var kvreader store.KVReader
kvreader, err = udc.store.Reader()
if err != nil {
docBackIndexRowErr = err
return
}
for docID, doc := range batch.IndexOps {
backIndexRow, err := udc.backIndexRowForDoc(kvreader, docID)
if err != nil {
docBackIndexRowErr = err
return
}
docBackIndexRowCh <- &docBackIndexRow{docID, doc, backIndexRow}
}
err = kvreader.Close()
if err != nil {
docBackIndexRowErr = err
return
}
}()
// wait for analysis result
newRowsMap := make(map[string][]index.IndexRow)
var itemsDeQueued uint64
for itemsDeQueued < numUpdates {
result := <-resultChan
newRowsMap[result.DocID] = result.Rows
itemsDeQueued++
}
close(resultChan)
atomic.AddUint64(&udc.stats.analysisTime, uint64(time.Since(analysisStart)))
docsAdded := uint64(0)
docsDeleted := uint64(0)
indexStart := time.Now()
// prepare a list of rows
var addRowsAll [][]UpsideDownCouchRow
var updateRowsAll [][]UpsideDownCouchRow
var deleteRowsAll [][]UpsideDownCouchRow
// add the internal ops
var updateRows []UpsideDownCouchRow
var deleteRows []UpsideDownCouchRow
for internalKey, internalValue := range batch.InternalOps {
if internalValue == nil {
// delete
deleteInternalRow := NewInternalRow([]byte(internalKey), nil)
deleteRows = append(deleteRows, deleteInternalRow)
} else {
updateInternalRow := NewInternalRow([]byte(internalKey), internalValue)
updateRows = append(updateRows, updateInternalRow)
}
}
if len(updateRows) > 0 {
updateRowsAll = append(updateRowsAll, updateRows)
}
if len(deleteRows) > 0 {
deleteRowsAll = append(deleteRowsAll, deleteRows)
}
// process back index rows as they arrive
for dbir := range docBackIndexRowCh {
if dbir.doc == nil && dbir.backIndexRow != nil {
// delete
deleteRows := udc.deleteSingle(dbir.docID, dbir.backIndexRow, nil)
if len(deleteRows) > 0 {
deleteRowsAll = append(deleteRowsAll, deleteRows)
}
docsDeleted++
} else if dbir.doc != nil {
addRows, updateRows, deleteRows := udc.mergeOldAndNew(dbir.backIndexRow, newRowsMap[dbir.docID])
if len(addRows) > 0 {
addRowsAll = append(addRowsAll, addRows)
}
if len(updateRows) > 0 {
updateRowsAll = append(updateRowsAll, updateRows)
}
if len(deleteRows) > 0 {
deleteRowsAll = append(deleteRowsAll, deleteRows)
}
if dbir.backIndexRow == nil {
docsAdded++
}
}
}
if docBackIndexRowErr != nil {
return docBackIndexRowErr
}
detectedUnsafeMutex.RLock()
defer detectedUnsafeMutex.RUnlock()
if detectedUnsafe {
return UnsafeBatchUseDetected
}
// start a writer for this batch
var kvwriter store.KVWriter
kvwriter, err = udc.store.Writer()
if err != nil {
return
}
err = udc.batchRows(kvwriter, addRowsAll, updateRowsAll, deleteRowsAll)
if err != nil {
_ = kvwriter.Close()
atomic.AddUint64(&udc.stats.errors, 1)
return
}
err = kvwriter.Close()
atomic.AddUint64(&udc.stats.indexTime, uint64(time.Since(indexStart)))
if err == nil {
udc.m.Lock()
udc.docCount += docsAdded
udc.docCount -= docsDeleted
udc.m.Unlock()
atomic.AddUint64(&udc.stats.updates, numUpdates)
atomic.AddUint64(&udc.stats.deletes, docsDeleted)
atomic.AddUint64(&udc.stats.batches, 1)
} else {
atomic.AddUint64(&udc.stats.errors, 1)
}
return
}
func (udc *UpsideDownCouch) Delete(id string) (err error) {
indexStart := time.Now()
udc.writeMutex.Lock()
defer udc.writeMutex.Unlock()
// open a reader for backindex lookup
var kvreader store.KVReader
kvreader, err = udc.store.Reader()
if err != nil {
return
}
// first we lookup the backindex row for the doc id if it exists
// lookup the back index row
var backIndexRow *BackIndexRow
backIndexRow, err = udc.backIndexRowForDoc(kvreader, id)
if err != nil {
_ = kvreader.Close()
atomic.AddUint64(&udc.stats.errors, 1)
return
}
err = kvreader.Close()
if err != nil {
return
}
if backIndexRow == nil {
atomic.AddUint64(&udc.stats.deletes, 1)
return
}
// start a writer for this delete
var kvwriter store.KVWriter
kvwriter, err = udc.store.Writer()
if err != nil {
return
}
defer func() {
if cerr := kvwriter.Close(); err == nil && cerr != nil {
err = cerr
}
}()
var deleteRowsAll [][]UpsideDownCouchRow
deleteRows := udc.deleteSingle(id, backIndexRow, nil)
if len(deleteRows) > 0 {
deleteRowsAll = append(deleteRowsAll, deleteRows)
}
err = udc.batchRows(kvwriter, nil, nil, deleteRowsAll)
if err == nil {
udc.m.Lock()
udc.docCount--
udc.m.Unlock()
}
atomic.AddUint64(&udc.stats.indexTime, uint64(time.Since(indexStart)))
if err == nil {
atomic.AddUint64(&udc.stats.deletes, 1)
} else {
atomic.AddUint64(&udc.stats.errors, 1)
}
return
}
func (udc *UpsideDownCouch) Open() (err error) {
//acquire the write mutex for the duratin of Open()
udc.writeMutex.Lock()
defer udc.writeMutex.Unlock()
// open the kv store
storeConstructor := registry.KVStoreConstructorByName(udc.storeName)
if storeConstructor == nil {
err = index.ErrorUnknownStorageType
return
}
// now open the store
udc.store, err = storeConstructor(&mergeOperator, udc.storeConfig)
if err != nil {
return
}
// start a reader to look at the index
var kvreader store.KVReader
kvreader, err = udc.store.Reader()
if err != nil {
return
}
var value []byte
value, err = kvreader.Get(VersionKey)
if err != nil {
_ = kvreader.Close()
return
}
if value != nil {
err = udc.loadSchema(kvreader)
if err != nil {
_ = kvreader.Close()
return
}
// set doc count
udc.m.Lock()
udc.docCount, err = udc.countDocs(kvreader)
udc.m.Unlock()
err = kvreader.Close()
} else {
// new index, close the reader and open writer to init
err = kvreader.Close()
if err != nil {
return
}
var kvwriter store.KVWriter
kvwriter, err = udc.store.Writer()
if err != nil {
return
}
defer func() {
if cerr := kvwriter.Close(); err == nil && cerr != nil {
err = cerr
}
}()
// init the index
err = udc.init(kvwriter)
}
return
}
func (udc *UpsideDownCouch) Update(doc *document.Document) (err error) {
// do analysis before acquiring write lock
analysisStart := time.Now()
resultChan := make(chan *index.AnalysisResult)
aw := index.NewAnalysisWork(udc, doc, resultChan)
// put the work on the queue
udc.analysisQueue.Queue(aw)
// wait for the result
result := <-resultChan
close(resultChan)
atomic.AddUint64(&udc.stats.analysisTime, uint64(time.Since(analysisStart)))
udc.writeMutex.Lock()
defer udc.writeMutex.Unlock()
// open a reader for backindex lookup
var kvreader store.KVReader
kvreader, err = udc.store.Reader()
if err != nil {
return
}
// first we lookup the backindex row for the doc id if it exists
// lookup the back index row
var backIndexRow *BackIndexRow
backIndexRow, err = udc.backIndexRowForDoc(kvreader, doc.ID)
if err != nil {
_ = kvreader.Close()
atomic.AddUint64(&udc.stats.errors, 1)
return
}
err = kvreader.Close()
if err != nil {
return
}
// start a writer for this update
indexStart := time.Now()
var kvwriter store.KVWriter
kvwriter, err = udc.store.Writer()
if err != nil {
return
}
defer func() {
if cerr := kvwriter.Close(); err == nil && cerr != nil {
err = cerr
}
}()
// prepare a list of rows
var addRowsAll [][]UpsideDownCouchRow
var updateRowsAll [][]UpsideDownCouchRow
var deleteRowsAll [][]UpsideDownCouchRow
addRows, updateRows, deleteRows := udc.mergeOldAndNew(backIndexRow, result.Rows)
if len(addRows) > 0 {
addRowsAll = append(addRowsAll, addRows)
}
if len(updateRows) > 0 {
updateRowsAll = append(updateRowsAll, updateRows)
}
if len(deleteRows) > 0 {
deleteRowsAll = append(deleteRowsAll, deleteRows)
}
err = udc.batchRows(kvwriter, addRowsAll, updateRowsAll, deleteRowsAll)
if err == nil && backIndexRow == nil {
udc.m.Lock()
udc.docCount++
udc.m.Unlock()
}
atomic.AddUint64(&udc.stats.indexTime, uint64(time.Since(indexStart)))
if err == nil {
atomic.AddUint64(&udc.stats.updates, 1)
} else {
atomic.AddUint64(&udc.stats.errors, 1)
}
return
}
func (f *Firestorm) Open() (err error) {
// open the kv store
storeConstructor := registry.KVStoreConstructorByName(f.storeName)
if storeConstructor == nil {
err = index.ErrorUnknownStorageType
return
}
// now open the store
f.store, err = storeConstructor(&mergeOperator, f.storeConfig)
if err != nil {
return
}
// start a reader
var kvreader store.KVReader
kvreader, err = f.store.Reader()
if err != nil {
return
}
// assert correct version, and find out if this is new index
var newIndex bool
newIndex, err = f.checkVersion(kvreader)
if err != nil {
return
}
if !newIndex {
// process existing index before opening
err = f.warmup(kvreader)
if err != nil {
return
}
}
err = kvreader.Close()
if err != nil {
return
}
if newIndex {
// prepare a new index
err = f.bootstrap()
if err != nil {
return
}
}
// start the garbage collector
f.garbageCollector.Start()
// start the lookuper
f.lookuper.Start()
// start the dict updater
f.dictUpdater.Start()
return
}