ethdb: remove Flush

This commit is contained in:
Felix Lange 2015-09-14 09:45:40 +02:00
parent d581dfee5f
commit b252589960
4 changed files with 10 additions and 51 deletions

@ -213,9 +213,6 @@ type Ethereum struct {
chainDb ethdb.Database // Block chain database
dappDb ethdb.Database // Dapp database
// Closed when databases are flushed and closed
databasesClosed chan bool
//*** SERVICES ***
// State manager for processing new blocks and managing the over all states
blockProcessor *core.BlockProcessor
@ -337,7 +334,6 @@ func New(config *Config) (*Ethereum, error) {
eth := &Ethereum{
shutdownChan: make(chan bool),
databasesClosed: make(chan bool),
chainDb: chainDb,
dappDb: dappDb,
eventMux: &event.TypeMux{},
@ -549,8 +545,6 @@ func (s *Ethereum) Start() error {
if err != nil {
return err
}
// periodically flush databases
go s.syncDatabases()
if s.AutoDAG {
s.StartAutoDAG()
@ -566,32 +560,6 @@ func (s *Ethereum) Start() error {
return nil
}
// sync databases every minute. If flushing fails we exit immediatly. The system
// may not continue under any circumstances.
func (s *Ethereum) syncDatabases() {
ticker := time.NewTicker(1 * time.Minute)
done:
for {
select {
case <-ticker.C:
// don't change the order of database flushes
if err := s.dappDb.Flush(); err != nil {
glog.Fatalf("fatal error: flush dappDb: %v (Restart your node. We are aware of this issue)\n", err)
}
if err := s.chainDb.Flush(); err != nil {
glog.Fatalf("fatal error: flush chainDb: %v (Restart your node. We are aware of this issue)\n", err)
}
case <-s.shutdownChan:
break done
}
}
s.chainDb.Close()
s.dappDb.Close()
close(s.databasesClosed)
}
func (s *Ethereum) StartForTest() {
jsonlogger.LogJson(&logger.LogStarting{
ClientString: s.net.Name,
@ -622,12 +590,13 @@ func (s *Ethereum) Stop() {
}
s.StopAutoDAG()
s.chainDb.Close()
s.dappDb.Close()
close(s.shutdownChan)
}
// This function will wait for a shutdown and resumes main thread execution
func (s *Ethereum) WaitForShutdown() {
<-s.databasesClosed
<-s.shutdownChan
}

@ -61,9 +61,7 @@ type LDBDatabase struct {
quitChan chan chan error // Quit channel to stop the metrics collection before closing the database
}
// NewLDBDatabase returns a LevelDB wrapped object. LDBDatabase does not persist data by
// it self but requires a background poller which syncs every X. `Flush` should be called
// when data needs to be stored and written to disk.
// NewLDBDatabase returns a LevelDB wrapped object.
func NewLDBDatabase(file string, cache int) (*LDBDatabase, error) {
// Calculate the cache allowance for this particular database
cache = int(float64(cache) * cacheRatio[filepath.Base(file)])
@ -142,11 +140,6 @@ func (self *LDBDatabase) NewIterator() iterator.Iterator {
return self.db.NewIterator(nil, nil)
}
// Flush flushes out the queue to leveldb
func (self *LDBDatabase) Flush() error {
return nil
}
func (self *LDBDatabase) Close() {
// Stop the metrics collection to avoid internal database races
self.quitLock.Lock()
@ -159,12 +152,14 @@ func (self *LDBDatabase) Close() {
glog.V(logger.Error).Infof("metrics failure in '%s': %v\n", self.fn, err)
}
}
// Flush and close the database
if err := self.Flush(); err != nil {
glog.V(logger.Error).Infof("flushing '%s' failed: %v\n", self.fn, err)
err := self.db.Close()
if glog.V(logger.Error) {
if err == nil {
glog.Infoln("closed db:", self.fn)
} else {
glog.Errorf("error closing db %s: %v", self.fn, err)
}
}
self.db.Close()
glog.V(logger.Error).Infoln("flushed and closed db:", self.fn)
}
func (self *LDBDatabase) LDB() *leveldb.DB {

@ -21,7 +21,6 @@ type Database interface {
Get(key []byte) ([]byte, error)
Delete(key []byte) error
Close()
Flush() error
NewBatch() Batch
}

@ -91,10 +91,6 @@ func (db *MemDatabase) LastKnownTD() []byte {
return data
}
func (db *MemDatabase) Flush() error {
return nil
}
func (db *MemDatabase) NewBatch() Batch {
return &memBatch{db: db}
}