func repoNewDataHandler(c web.C, w http.ResponseWriter, r *http.Request) {
uuid := c.Env["uuid"].(dvid.UUID)
config := dvid.NewConfig()
if err := config.SetByJSON(r.Body); err != nil {
BadRequest(w, r, fmt.Sprintf("Error decoding POSTed JSON config for 'new': %v", err))
return
}
// Make sure that the passed configuration has data type and instance name.
typename, found, err := config.GetString("typename")
if !found || err != nil {
BadRequest(w, r, "POST on repo endpoint requires specification of valid 'typename'")
return
}
dataname, found, err := config.GetString("dataname")
if !found || err != nil {
BadRequest(w, r, "POST on repo endpoint requires specification of valid 'dataname'")
return
}
typeservice, err := datastore.TypeServiceByName(dvid.TypeString(typename))
if err != nil {
BadRequest(w, r, err)
return
}
_, err = datastore.NewData(uuid, typeservice, dvid.InstanceName(dataname), config)
if err != nil {
BadRequest(w, r, err)
return
}
w.Header().Set("Content-Type", "application/json")
fmt.Fprintf(w, "{%q: 'Added %s [%s] to node %s'}", "result", dataname, typename, uuid)
}
func typehelpHandler(c web.C, w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain")
typename := dvid.TypeString(c.URLParams["typename"])
typeservice, err := datastore.TypeServiceByName(typename)
if err != nil {
BadRequest(w, r, err)
return
}
fmt.Fprintf(w, typeservice.Help())
}
// Do acts as a switchboard for remote command execution
func (c *RPCConnection) Do(cmd datastore.Request, reply *datastore.Response) error {
if reply == nil {
dvid.Debugf("reply is nil coming in!\n")
return nil
}
if cmd.Name() == "" {
return fmt.Errorf("Server error: got empty command!")
}
switch cmd.Name() {
case "help":
reply.Text = fmt.Sprintf(RPCHelpMessage, config.RPCAddress(), config.HTTPAddress())
case "shutdown":
Shutdown()
// Make this process shutdown in a second to allow time for RPC to finish.
// TODO -- Better way to do this?
log.Printf("DVID server halted due to 'shutdown' command.")
reply.Text = fmt.Sprintf("DVID server at %s has been halted.\n", config.RPCAddress())
go func() {
time.Sleep(1 * time.Second)
os.Exit(0)
}()
case "types":
if len(cmd.Command) == 1 {
text := "\nData Types within this DVID Server\n"
text += "----------------------------------\n"
mapTypes, err := datastore.Types()
if err != nil {
return fmt.Errorf("Error trying to retrieve data types within this DVID server!")
}
for url, typeservice := range mapTypes {
text += fmt.Sprintf("%-20s %s\n", typeservice.GetTypeName(), url)
}
reply.Text = text
} else {
if len(cmd.Command) != 3 || cmd.Command[2] != "help" {
return fmt.Errorf("Unknown types command: %q", cmd.Command)
}
var typename string
cmd.CommandArgs(1, &typename)
typeservice, err := datastore.TypeServiceByName(dvid.TypeString(typename))
if err != nil {
return err
}
reply.Text = typeservice.Help()
}
case "repos":
var subcommand, alias, description, uuidStr string
cmd.CommandArgs(1, &subcommand, &alias, &description, &uuidStr)
switch subcommand {
case "new":
var assign *dvid.UUID
if uuidStr == "" {
assign = nil
} else {
u := dvid.UUID(uuidStr)
assign = &u
}
root, err := datastore.NewRepo(alias, description, assign)
if err != nil {
return err
}
if err := datastore.SetRepoAlias(root, alias); err != nil {
return err
}
if err := datastore.SetRepoDescription(root, description); err != nil {
return err
}
reply.Text = fmt.Sprintf("New repo %q created with head node %s\n", alias, root)
default:
return fmt.Errorf("Unknown repos command: %q", subcommand)
}
case "repo":
var uuidStr, subcommand string
cmd.CommandArgs(1, &uuidStr, &subcommand)
uuid, _, err := datastore.MatchingUUID(uuidStr)
if err != nil {
return err
}
switch subcommand {
case "new":
var typename, dataname string
cmd.CommandArgs(3, &typename, &dataname)
// Get TypeService
typeservice, err := datastore.TypeServiceByName(dvid.TypeString(typename))
if err != nil {
return err
}
// Create new data
config := cmd.Settings()
_, err = datastore.NewData(uuid, typeservice, dvid.InstanceName(dataname), config)
if err != nil {
return err
}
reply.Text = fmt.Sprintf("Data %q [%s] added to node %s\n", dataname, typename, uuid)
datastore.AddToRepoLog(uuid, []string{cmd.String()})
case "branch":
cmd.CommandArgs(3, &uuidStr)
var assign *dvid.UUID
if uuidStr == "" {
assign = nil
} else {
u := dvid.UUID(uuidStr)
assign = &u
}
child, err := datastore.NewVersion(uuid, fmt.Sprintf("branch of %s", uuid), assign)
if err != nil {
return err
}
reply.Text = fmt.Sprintf("Branch %s added to node %s\n", child, uuid)
datastore.AddToRepoLog(uuid, []string{cmd.String()})
case "merge":
uuids := cmd.CommandArgs(2)
parents := make([]dvid.UUID, len(uuids)+1)
parents[0] = dvid.UUID(uuid)
i := 1
for uuid := range uuids {
parents[i] = dvid.UUID(uuid)
i++
}
child, err := datastore.Merge(parents, fmt.Sprintf("merge of parents %v", parents), datastore.MergeConflictFree)
if err != nil {
return err
}
reply.Text = fmt.Sprintf("Parents %v merged into node %s\n", parents, child)
datastore.AddToRepoLog(uuid, []string{cmd.String()})
case "push":
/*
var target string
cmd.CommandArgs(3, &target)
config := cmd.Settings()
if err = datastore.Push(repo, target, config); err != nil {
return err
}
reply.Text = fmt.Sprintf("Repo %q pushed to %q\n", repo.RootUUID(), target)
*/
return fmt.Errorf("push command has been temporarily suspended")
default:
return fmt.Errorf("Unknown command: %q", cmd)
}
case "node":
var uuidStr, descriptor string
cmd.CommandArgs(1, &uuidStr, &descriptor)
uuid, _, err := datastore.MatchingUUID(uuidStr)
if err != nil {
return err
}
// Get the DataService
dataname := dvid.InstanceName(descriptor)
var subcommand string
cmd.CommandArgs(3, &subcommand)
dataservice, err := datastore.GetDataByUUID(uuid, dataname)
if err != nil {
return err
}
if subcommand == "help" {
reply.Text = dataservice.Help()
return nil
}
return dataservice.DoRPC(cmd, reply)
default:
return fmt.Errorf("Unknown command: '%s'", cmd)
}
return nil
}
// Initialize the storage systems. Returns a bool + error where the bool is
// true if the metadata store is newly created and needs initialization.
// The map of store configurations should be keyed by either a datatype name,
// "default", or "metadata".
func Initialize(cmdline dvid.Config, backend *Backend) (createdMetadata bool, err error) {
dvid.Infof("backend:\n%v\n", *backend)
// Open all the backend stores
manager.stores = make(map[Alias]dvid.Store, len(backend.Stores))
var gotDefault, gotMetadata, createdDefault, lastCreated bool
var lastStore dvid.Store
for alias, dbconfig := range backend.Stores {
var store dvid.Store
for dbalias, db := range manager.stores {
if db.Equal(dbconfig) {
return false, fmt.Errorf("Store %q configuration is duplicate of store %q", alias, dbalias)
}
}
store, created, err := NewStore(dbconfig)
if err != nil {
return false, fmt.Errorf("bad store %q: %v", alias, err)
}
if alias == backend.Metadata {
gotMetadata = true
createdMetadata = created
manager.metadataStore = store
}
if alias == backend.Default {
gotDefault = true
createdDefault = created
manager.defaultStore = store
}
manager.stores[alias] = store
lastStore = store
lastCreated = created
}
// Return if we don't have default or metadata stores. Should really be caught
// at configuration loading, but here as well as double check.
if !gotDefault {
if len(backend.Stores) == 1 {
manager.defaultStore = lastStore
createdDefault = lastCreated
} else {
return false, fmt.Errorf("either backend.default or a single store must be set in configuration TOML file")
}
}
if !gotMetadata {
manager.metadataStore = manager.defaultStore
createdMetadata = createdDefault
}
dvid.Infof("Default store: %s\n", manager.defaultStore)
dvid.Infof("Metadata store: %s\n", manager.metadataStore)
// Setup the groupcache if specified.
err = setupGroupcache(backend.Groupcache)
if err != nil {
return
}
// Make all data instance or datatype-specific store assignments.
manager.instanceStore = make(map[dvid.DataSpecifier]dvid.Store)
manager.datatypeStore = make(map[dvid.TypeString]dvid.Store)
for dataspec, alias := range backend.Mapping {
if dataspec == "default" || dataspec == "metadata" {
continue
}
store, found := manager.stores[alias]
if !found {
err = fmt.Errorf("bad backend store alias: %q -> %q", dataspec, alias)
return
}
// Cache the store for mapped datatype or data instance.
name := strings.Trim(string(dataspec), "\"")
parts := strings.Split(name, ":")
switch len(parts) {
case 1:
manager.datatypeStore[dvid.TypeString(name)] = store
case 2:
dataid := dvid.GetDataSpecifier(dvid.InstanceName(parts[0]), dvid.UUID(parts[1]))
manager.instanceStore[dataid] = store
default:
err = fmt.Errorf("bad backend data specification: %s", dataspec)
return
}
}
manager.setup = true
// Setup the graph store
var store dvid.Store
store, err = assignedStoreByType("labelgraph")
if err != nil {
return
}
var ok bool
kvdb, ok := store.(OrderedKeyValueDB)
if !ok {
return false, fmt.Errorf("assigned labelgraph store %q isn't ordered kv db", store)
}
manager.graphDB, err = NewGraphStore(kvdb)
if err != nil {
return false, err
}
manager.graphSetter, ok = manager.graphDB.(GraphSetter)
if !ok {
return false, fmt.Errorf("Database %q cannot support a graph setter", kvdb)
}
manager.graphGetter, ok = manager.graphDB.(GraphGetter)
if !ok {
return false, fmt.Errorf("Database %q cannot support a graph getter", kvdb)
}
return
}
// switchboard for remote command execution
func handleCommand(cmd *datastore.Request) (reply *datastore.Response, err error) {
if cmd.Name() == "" {
err = fmt.Errorf("Server error: got empty command!")
return
}
reply = new(datastore.Response)
switch cmd.Name() {
case "help":
reply.Text = fmt.Sprintf(RPCHelpMessage, config.RPCAddress(), config.HTTPAddress())
case "shutdown":
dvid.Infof("DVID server halting due to 'shutdown' command.")
reply.Text = fmt.Sprintf("DVID server at %s is being shutdown...\n", config.RPCAddress())
// launch goroutine shutdown so we can concurrently return shutdown message to client.
go Shutdown()
case "types":
if len(cmd.Command) == 1 {
text := "\nData Types within this DVID Server\n"
text += "----------------------------------\n"
var mapTypes map[dvid.URLString]datastore.TypeService
if mapTypes, err = datastore.Types(); err != nil {
err = fmt.Errorf("Error trying to retrieve data types within this DVID server!")
return
}
for url, typeservice := range mapTypes {
text += fmt.Sprintf("%-20s %s\n", typeservice.GetTypeName(), url)
}
reply.Text = text
} else {
if len(cmd.Command) != 3 || cmd.Command[2] != "help" {
err = fmt.Errorf("Unknown types command: %q", cmd.Command)
return
}
var typename string
var typeservice datastore.TypeService
cmd.CommandArgs(1, &typename)
if typeservice, err = datastore.TypeServiceByName(dvid.TypeString(typename)); err != nil {
return
}
reply.Text = typeservice.Help()
}
case "repos":
var subcommand string
cmd.CommandArgs(1, &subcommand)
switch subcommand {
case "new":
var alias, description string
cmd.CommandArgs(2, &alias, &description)
config := cmd.Settings()
var uuidStr, passcode string
var found bool
if uuidStr, found, err = config.GetString("uuid"); err != nil {
return
}
var assign *dvid.UUID
if !found {
assign = nil
} else {
uuid := dvid.UUID(uuidStr)
assign = &uuid
}
if passcode, found, err = config.GetString("passcode"); err != nil {
return
}
var root dvid.UUID
root, err = datastore.NewRepo(alias, description, assign, passcode)
if err != nil {
return
}
if err = datastore.SetRepoAlias(root, alias); err != nil {
return
}
if err = datastore.SetRepoDescription(root, description); err != nil {
return
}
reply.Text = fmt.Sprintf("New repo %q created with head node %s\n", alias, root)
case "delete":
var uuidStr, passcode string
cmd.CommandArgs(2, &uuidStr, &passcode)
var uuid dvid.UUID
if uuid, _, err = datastore.MatchingUUID(uuidStr); err != nil {
return
}
if err = datastore.DeleteRepo(uuid, passcode); err != nil {
return
}
reply.Text = fmt.Sprintf("Started deletion of repo %s.\n", uuid)
default:
err = fmt.Errorf("Unknown repos command: %q", subcommand)
return
}
case "repo":
var uuidStr, subcommand string
cmd.CommandArgs(1, &uuidStr, &subcommand)
var uuid dvid.UUID
if uuid, _, err = datastore.MatchingUUID(uuidStr); err != nil {
return
}
switch subcommand {
case "new":
var typename, dataname string
cmd.CommandArgs(3, &typename, &dataname)
// Get TypeService
var typeservice datastore.TypeService
if typeservice, err = datastore.TypeServiceByName(dvid.TypeString(typename)); err != nil {
return
}
// Create new data
config := cmd.Settings()
if _, err = datastore.NewData(uuid, typeservice, dvid.InstanceName(dataname), config); err != nil {
return
}
reply.Text = fmt.Sprintf("Data %q [%s] added to node %s\n", dataname, typename, uuid)
datastore.AddToRepoLog(uuid, []string{cmd.String()})
case "rename":
var name1, name2, passcode string
cmd.CommandArgs(3, &name1, &name2, &passcode)
oldname := dvid.InstanceName(name1)
newname := dvid.InstanceName(name2)
// Make sure this instance exists.
if _, err = datastore.GetDataByUUIDName(uuid, oldname); err != nil {
err = fmt.Errorf("Error trying to rename %q for UUID %s: %v", oldname, uuid, err)
return
}
// Do the rename.
if err = datastore.RenameData(uuid, oldname, newname, passcode); err != nil {
err = fmt.Errorf("Error renaming data instance %q to %q: %v", oldname, newname, err)
return
}
reply.Text = fmt.Sprintf("Renamed data instance %q to %q from DAG subgraph @ root %s\n", oldname, newname, uuid)
case "branch":
cmd.CommandArgs(3, &uuidStr)
var assign *dvid.UUID
if uuidStr == "" {
assign = nil
} else {
u := dvid.UUID(uuidStr)
assign = &u
}
var child dvid.UUID
if child, err = datastore.NewVersion(uuid, fmt.Sprintf("branch of %s", uuid), assign); err != nil {
return
}
reply.Text = fmt.Sprintf("Branch %s added to node %s\n", child, uuid)
datastore.AddToRepoLog(uuid, []string{cmd.String()})
case "merge":
uuids := cmd.CommandArgs(2)
parents := make([]dvid.UUID, len(uuids)+1)
parents[0] = dvid.UUID(uuid)
i := 1
for uuid := range uuids {
parents[i] = dvid.UUID(uuid)
i++
}
var child dvid.UUID
child, err = datastore.Merge(parents, fmt.Sprintf("merge of parents %v", parents), datastore.MergeConflictFree)
if err != nil {
return
}
reply.Text = fmt.Sprintf("Parents %v merged into node %s\n", parents, child)
datastore.AddToRepoLog(uuid, []string{cmd.String()})
case "migrate":
var source, oldStoreName string
cmd.CommandArgs(3, &source, &oldStoreName)
var store dvid.Store
store, err = storage.GetStoreByAlias(storage.Alias(oldStoreName))
if err != nil {
return
}
config := cmd.Settings()
go func() {
if err = datastore.MigrateInstance(uuid, dvid.InstanceName(source), store, config); err != nil {
dvid.Errorf("migrate error: %v\n", err)
}
}()
reply.Text = fmt.Sprintf("Started migration of uuid %s data instance %q from old store %q...\n", uuid, source, oldStoreName)
case "copy":
var source, target string
cmd.CommandArgs(3, &source, &target)
config := cmd.Settings()
go func() {
if err = datastore.CopyInstance(uuid, dvid.InstanceName(source), dvid.InstanceName(target), config); err != nil {
dvid.Errorf("copy error: %v\n", err)
}
}()
reply.Text = fmt.Sprintf("Started copy of uuid %s data instance %q to %q...\n", uuid, source, target)
case "push":
var target string
cmd.CommandArgs(3, &target)
config := cmd.Settings()
go func() {
if err = datastore.PushRepo(uuid, target, config); err != nil {
dvid.Errorf("push error: %v\n", err)
}
}()
reply.Text = fmt.Sprintf("Started push of repo %s to %q...\n", uuid, target)
/*
case "pull":
var target string
cmd.CommandArgs(3, &target)
config := cmd.Settings()
if err = datastore.Pull(uuid, target, config); err != nil {
return
}
reply.Text = fmt.Sprintf("Repo %s pulled from %q\n", uuid, target)
*/
case "delete":
var dataname, passcode string
cmd.CommandArgs(3, &dataname, &passcode)
// Make sure this instance exists.
if _, err = datastore.GetDataByUUIDName(uuid, dvid.InstanceName(dataname)); err != nil {
err = fmt.Errorf("Error trying to delete %q for UUID %s: %v", dataname, uuid, err)
return
}
// Do the deletion. Under hood, modifies metadata immediately and launches async k/v deletion.
if err = datastore.DeleteDataByName(uuid, dvid.InstanceName(dataname), passcode); err != nil {
err = fmt.Errorf("Error deleting data instance %q: %v", dataname, err)
return
}
reply.Text = fmt.Sprintf("Started deletion of data instance %q from repo with root %s\n", dataname, uuid)
default:
err = fmt.Errorf("Unknown command: %q", cmd)
return
}
case "node":
var uuidStr, descriptor string
cmd.CommandArgs(1, &uuidStr, &descriptor)
var uuid dvid.UUID
if uuid, _, err = datastore.MatchingUUID(uuidStr); err != nil {
return
}
// Get the DataService
dataname := dvid.InstanceName(descriptor)
var subcommand string
cmd.CommandArgs(3, &subcommand)
var dataservice datastore.DataService
if dataservice, err = datastore.GetDataByUUIDName(uuid, dataname); err != nil {
return
}
if subcommand == "help" {
reply.Text = dataservice.Help()
return
}
err = dataservice.DoRPC(*cmd, reply)
return
default:
// Check to see if it's a name of a compiled data type, in which case we refer it to the data type.
types := datastore.CompiledTypes()
for name, typeservice := range types {
if name == dvid.TypeString(cmd.Argument(0)) {
err = typeservice.Do(*cmd, reply)
return
}
}
err = fmt.Errorf("Unknown command: '%s'", *cmd)
}
return
}