func list(c *cli.Context) {
dbPath := c.GlobalString("path")
pwd, err := os.Getwd()
dbPath = path.Join(pwd, dbPath)
options := &opt.Options{ErrorIfMissing: true}
db, err := leveldb.OpenFile(dbPath, options)
if err != nil {
msg := fmt.Sprintf("%s %s", err, dbPath)
panic(msg)
}
fmt.Println("using database:", dbPath)
defer db.Close()
var iter iterator.Iterator
fmt.Println("Listing reading keys...")
iter = db.NewIterator(&dbutil.Range{Start: []byte("/reading/RF12:"), Limit: []byte("/reading/RF12~")}, nil)
for iter.Next() {
key := string(iter.Key())
fmt.Println(key)
}
iter.Release()
//err = iter.Error()
}
// Builds table from src iterator.
func (t *tOps) createFrom(src iterator.Iterator) (f *tFile, n int, err error) {
w, err := t.create()
if err != nil {
return
}
defer func() {
if err != nil {
w.drop()
}
}()
for src.Next() {
err = w.append(src.Key(), src.Value())
if err != nil {
return
}
}
err = src.Error()
if err != nil {
return
}
n = w.tw.EntriesLen()
f, err = w.finish()
return
}
//Function: isExpireT
//Checkes whether the file is expired or not. If expired delete the file.
//Parameters:
// fileName - file name
// iterT - pointer database location
// Return:
// true - file expired
// false - file alive
func isExpireT(fileName string, iterT iterator.Iterator) bool {
var expFlag int = 0
var flag int = 0
var f3 DBData
key1 := iterT.Key()
if string(key1) == fileName {
flag = 1
}
if flag == 1 {
tmp := iterT.Value()
json.Unmarshal(tmp, &f3)
var flagT1 int = f3.TFlag
if flagT1 == 1 {
timeT := f3.Life
now := time.Now()
tmp := timeT.Before(now)
if tmp {
expFlag = 1
}
} else {
expFlag = 0
}
}
if expFlag == 1 {
return true
} else {
return false
}
}
func (h *blockHarness) testKV(act string, iter iterator.Iterator, i int) {
key, value := h.kv[i], h.kv[i+1]
if !bytes.Equal(iter.Key(), key) {
h.t.Fatalf("block: %s: key invalid, want=%q got=%q", act, key, iter.Key())
}
if !bytes.Equal(iter.Value(), value) {
h.t.Fatalf("block: %s: value invalid, want=%q got=%q", act, value, iter.Value())
}
}
func (h *blockHarness) last(iter iterator.Iterator) {
if len(h.kv) == 0 {
if iter.Last() {
h.t.Fatalf("block: Last: expect eoi, key=%q", iter.Key())
}
} else {
if !iter.Last() {
h.t.Fatalf("block: Last: eoi, err=%v", iter.Error())
}
}
}
// reads the next node record from the iterator, skipping over other
// database entries.
func nextNode(it iterator.Iterator) *Node {
for end := false; !end; end = !it.Next() {
id, field := splitKey(it.Key())
if field != nodeDBDiscoverRoot {
continue
}
var n Node
if err := rlp.DecodeBytes(it.Value(), &n); err != nil {
if glog.V(logger.Warn) {
glog.Errorf("invalid node %x: %v", id, err)
}
continue
}
return &n
}
return nil
}
// Get lookup for given key on the table. Get returns errors.ErrNotFound if
// given key did not exist.
func (t *Reader) Get(key []byte, ro opt.ReadOptionsGetter) (rkey, rvalue []byte, err error) {
// create an iterator of index block
index_iter := t.indexBlock.NewIterator()
if !index_iter.Seek(key) {
err = index_iter.Error()
if err == nil {
err = errors.ErrNotFound
}
return
}
// decode data block info
bi := new(bInfo)
_, err = bi.decodeFrom(index_iter.Value())
if err != nil {
return
}
// get the data block
if t.filterBlock == nil || t.filterBlock.KeyMayMatch(uint(bi.offset), key) {
var it iterator.Iterator
var cache cache.Object
it, cache, err = t.getDataIter(bi, ro)
if err != nil {
return
}
if cache != nil {
defer cache.Release()
}
// seek to key
if !it.Seek(key) {
err = it.Error()
if err == nil {
err = errors.ErrNotFound
}
return
}
rkey, rvalue = it.Key(), it.Value()
} else {
err = errors.ErrNotFound
}
return
}
// Make the actual query. Sanity checks of the iterator i is expected to
// have been done before calling this function.
func safeQuery(i iter.Iterator, req QueryRequest, res chan StoredEvent) {
defer close(res)
for i.Valid() {
curKey, err := newEventStoreKey(i.Key())
if err != nil {
log.Println("A key could not be deserialized:")
// Panicing here, because this error most
// certainly needs to be looked at by a
// an operator.
log.Panicln(string(i.Key()))
}
if bytes.Compare(curKey.groupKey, eventPrefix) != 0 {
break
}
if bytes.Compare(curKey.key, req.Stream) != 0 {
break
}
resEvent := StoredEvent{
curKey.keyId.toBytes(),
Event{
curKey.key,
[]byte(i.Value()),
},
}
res <- resEvent
keyId := curKey.keyId.toBytes()
if req.ToId != nil && bytes.Compare(req.ToId, keyId) == 0 {
break
}
i.Next()
}
}
func convertFrom(c *cli.Context) {
success := true
defaultBand := c.GlobalString("band")
dbPath := c.GlobalString("path")
pwd, err := os.Getwd()
dbPath = path.Join(pwd, dbPath)
options := &opt.Options{ErrorIfMissing: true}
db, err := leveldb.OpenFile(dbPath, options)
if err != nil {
msg := fmt.Sprintf("%s %s", err, dbPath)
panic(msg)
}
fmt.Println("using database:", dbPath)
defer db.Close()
var iter iterator.Iterator
fmt.Println("Converting FROM band format...")
iter = db.NewIterator(&dbutil.Range{Start: []byte("/reading/RF12:"), Limit: []byte("/reading/RF12~")}, nil)
for iter.Next() {
key := string(iter.Key())
rval := iter.Value()
kparts := strings.Split(key, "/")
rfnet := kparts[len(kparts)-1:]
rfparts := strings.Split(rfnet[0], ":")
if len(rfparts) == 4 { //its an new format with band
if rfparts[1] == defaultBand {
fmt.Println("INFO:Downgrading:", key)
//remove band
copy(rfparts[1:], rfparts[1+1:])
rfparts[len(rfparts)-1] = ""
rfparts = rfparts[:len(rfparts)-1]
//adjust the json structure
var reading Reading
err := json.Unmarshal(rval, &reading)
if err == nil {
id := fmt.Sprintf("%s", strings.Join(rfparts, ":"))
reading.Id = id
fmt.Println("INFO:New reading:", reading)
data, err := json.Marshal(reading)
if err == nil {
//write a new key
newkey := "/reading/" + id
err = db.Put([]byte(newkey), []byte(data), nil)
if err != nil {
fmt.Println("ERR:Write failed for:", newkey)
success = false
continue
}
fmt.Println("INFO:New Reading Stored:", newkey)
//remove old key
err = db.Delete([]byte(key), nil)
if err != nil {
success = false
fmt.Println("WARN: could not remove old key:", key)
}
}
} else {
fmt.Println("Err:Failed to unmarshal data:", err)
success = false
}
}
}
}
iter.Release()
err = iter.Error()
if err != nil {
fmt.Println(err)
}
fmt.Println("Downgrade finished")
if !success {
fmt.Println("problems detected, please review screen")
}
}