// Shutdown handles graceful cleanup of server functions before exiting DVID.
// This may not be so graceful if the chunk handler uses cgo since the interrupt
// may be caught during cgo execution.
func Shutdown() {
// Stop accepting HTTP requests.
httpAvail = false
// Wait for chunk handlers.
waits := 0
for {
active := MaxChunkHandlers - len(HandlerToken)
if waits >= 20 {
dvid.Infof("Already waited for 20 seconds. Continuing with shutdown...")
break
} else if active > 0 {
dvid.Infof("Waiting for %d chunk handlers to finish...\n", active)
waits++
} else {
dvid.Infof("No chunk handlers active. Proceeding...\n")
break
}
time.Sleep(1 * time.Second)
}
dvid.Infof("Waiting 5 seconds for any HTTP requests to drain...\n")
time.Sleep(5 * time.Second)
datastore.Shutdown()
dvid.BlockOnActiveCgo()
rpc.Shutdown()
dvid.Shutdown()
shutdownCh <- struct{}{}
}
func CloseStore() {
mu.Lock()
defer mu.Unlock()
count--
if count == 0 {
dvid.BlockOnActiveCgo()
if engine == nil {
log.Fatalf("Attempted to close non-existant engine!")
}
// Close engine and delete store.
engine.Close()
engine = nil
if err := os.RemoveAll(dbpath); err != nil {
log.Fatalf("Unable to cleanup test store: %s\n", dbpath)
}
}
}
// Shutdown handles graceful cleanup of server functions before exiting DVID.
// This may not be so graceful if the chunk handler uses cgo since the interrupt
// may be caught during cgo execution.
func Shutdown() {
waits := 0
for {
active := MaxChunkHandlers - len(HandlerToken)
if waits >= 20 {
log.Printf("Already waited for 20 seconds. Continuing with shutdown...")
break
} else if active > 0 {
log.Printf("Waiting for %d chunk handlers to finish...\n", active)
waits++
} else {
log.Println("No chunk handlers active...")
break
}
time.Sleep(1 * time.Second)
}
datastore.Close()
dvid.BlockOnActiveCgo()
}
// CloseReopenStore forces close of the underlying storage engine and then reopening
// the datastore. Useful for testing metadata persistence.
func CloseReopenStore() {
mu.Lock()
defer mu.Unlock()
dvid.BlockOnActiveCgo()
if engine == nil {
log.Fatalf("Attempted to close and reopen non-existant engine!")
}
engine.Close()
var err error
create := false
engine, err = local.NewKeyValueStore(dbpath, create, dvid.Config{})
if err != nil {
log.Fatalf("Error reopening test db at %s: %v\n", dbpath, err)
}
if err = storage.Initialize(engine, "testdb"); err != nil {
log.Fatalf("CloseReopenStore: bad storage.Initialize(): %v\n", err)
}
if err = datastore.Initialize(); err != nil {
log.Fatalf("CloseReopenStore: can't initialize datastore management: %v\n", err)
}
}
