Example #1
0
// Test added after error in getting two paths to the same ancestor k/v after merge.
func TestDiamondGetOnMerge(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	config := dvid.NewConfig()
	dataservice, err := datastore.NewData(uuid, kvtype, "mergetest", config)
	if err != nil {
		t.Fatalf("Error creating new keyvalue instance: %v\n", err)
	}
	data, ok := dataservice.(*Data)
	if !ok {
		t.Fatalf("Returned new data instance is not roi.Data\n")
	}

	// PUT a value
	key1 := "mykey"
	value1 := "some stuff"
	key1req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid, data.DataName(), key1)
	server.TestHTTP(t, "POST", key1req, strings.NewReader(value1))

	if err = datastore.Commit(uuid, "my commit msg", []string{"stuff one", "stuff two"}); err != nil {
		t.Errorf("Unable to lock root node %s: %v\n", uuid, err)
	}
	uuid2, err := datastore.NewVersion(uuid, "first child", nil)
	if err != nil {
		t.Fatalf("Unable to create 1st child off root %s: %v\n", uuid, err)
	}
	if err = datastore.Commit(uuid2, "first child", nil); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid2, err)
	}
	uuid3, err := datastore.NewVersion(uuid, "second child", nil)
	if err != nil {
		t.Fatalf("Unable to create 2nd child off root %s: %v\n", uuid, err)
	}
	if err = datastore.Commit(uuid3, "second child", nil); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid3, err)
	}

	child, err := datastore.Merge([]dvid.UUID{uuid2, uuid3}, "merging stuff", datastore.MergeConflictFree)
	if err != nil {
		t.Errorf("Error doing merge: %v\n", err)
	}

	// We should be able to see just the original uuid value of the k/v
	childreq := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, child, data.DataName(), key1)
	returnValue := server.TestHTTP(t, "GET", childreq, nil)
	if string(returnValue) != value1 {
		t.Errorf("Error on merged child, key %q: expected %q, got %q\n", key1, value1, string(returnValue))
	}
}
Example #2
0
// TODO -- Might allow specification of UUID for child via HTTP, or only
// allow this potentially dangerous op via command line.
func repoBranchHandler(c web.C, w http.ResponseWriter, r *http.Request) {
	uuid := c.Env["uuid"].(dvid.UUID)
	jsonData := struct {
		Note string `json:"note"`
	}{}
	if r.Body != nil {
		data, err := ioutil.ReadAll(r.Body)
		if err != nil {
			BadRequest(w, r, err)
			return
		}

		if len(data) > 0 {
			if err := json.Unmarshal(data, &jsonData); err != nil {
				BadRequest(w, r, fmt.Sprintf("Malformed JSON request in body: %v", err))
				return
			}
		}

	}
	newuuid, err := datastore.NewVersion(uuid, jsonData.Note, nil)
	if err != nil {
		BadRequest(w, r, err)
	} else {
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, "{%q: %q}", "child", newuuid)
	}
}
Example #3
0
func TestKeyvalueVersioning(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	config := dvid.NewConfig()
	dataservice, err := datastore.NewData(uuid, kvtype, "versiontest", config)
	if err != nil {
		t.Fatalf("Error creating new keyvalue instance: %v\n", err)
	}
	data, ok := dataservice.(*Data)
	if !ok {
		t.Fatalf("Returned new data instance is not roi.Data\n")
	}

	// PUT a value
	key1 := "mykey"
	value1 := "some stuff"
	key1req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid, data.DataName(), key1)
	server.TestHTTP(t, "POST", key1req, strings.NewReader(value1))

	// Add 2nd k/v
	key2 := "my2ndkey"
	value2 := "more good stuff"
	key2req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid, data.DataName(), key2)
	server.TestHTTP(t, "POST", key2req, strings.NewReader(value2))

	// Create a new version in repo
	if err = datastore.Commit(uuid, "my commit msg", []string{"stuff one", "stuff two"}); err != nil {
		t.Errorf("Unable to lock root node %s: %v\n", uuid, err)
	}
	uuid2, err := datastore.NewVersion(uuid, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid, err)
	}
	_, err = datastore.VersionFromUUID(uuid2)
	if err != nil {
		t.Fatalf("Unable to get version ID from new uuid %s: %v\n", uuid2, err)
	}

	// Change the 2nd k/v
	uuid2val := "this is completely different"
	uuid2req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid2, data.DataName(), key2)
	server.TestHTTP(t, "POST", uuid2req, strings.NewReader(uuid2val))

	// Get the first version value
	returnValue := server.TestHTTP(t, "GET", key2req, nil)
	if string(returnValue) != value2 {
		t.Errorf("Error on first version, key %q: expected %s, got %s\n", key2, value2, string(returnValue))
	}

	// Get the second version value
	returnValue = server.TestHTTP(t, "GET", uuid2req, nil)
	if string(returnValue) != uuid2val {
		t.Errorf("Error on second version, key %q: expected %s, got %s\n", key2, uuid2val, string(returnValue))
	}

	// Check return of first two keys in range.
	rangereq := fmt.Sprintf("%snode/%s/%s/keyrange/%s/%s", server.WebAPIPath, uuid, data.DataName(),
		"my", "zebra")
	returnValue = server.TestHTTP(t, "GET", rangereq, nil)

	var retrievedKeys []string
	if err = json.Unmarshal(returnValue, &retrievedKeys); err != nil {
		t.Errorf("Bad key range request unmarshal: %v\n", err)
	}
	if len(retrievedKeys) != 2 || retrievedKeys[1] != "mykey" && retrievedKeys[0] != "my2ndKey" {
		t.Errorf("Bad key range request return.  Expected: [%q,%q].  Got: %s\n",
			key1, key2, string(returnValue))
	}

	// Commit the repo
	if err = datastore.Commit(uuid2, "my 2nd commit msg", []string{"changed 2nd k/v"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid2, err)
	}

	// Make grandchild of root
	uuid3, err := datastore.NewVersion(uuid2, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid2, err)
	}

	// Delete the 2nd k/v
	uuid3req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid3, data.DataName(), key2)
	server.TestHTTP(t, "DELETE", uuid3req, nil)

	server.TestBadHTTP(t, "GET", uuid3req, nil)

	// Make sure the 2nd k/v is correct for each of previous versions.
	returnValue = server.TestHTTP(t, "GET", key2req, nil)
	if string(returnValue) != value2 {
		t.Errorf("Error on first version, key %q: expected %s, got %s\n", key2, value2, string(returnValue))
	}
	returnValue = server.TestHTTP(t, "GET", uuid2req, nil)
	if string(returnValue) != uuid2val {
		t.Errorf("Error on second version, key %q: expected %s, got %s\n", key2, uuid2val, string(returnValue))
	}

	// Make a child
	if err = datastore.Commit(uuid3, "my 3rd commit msg", []string{"deleted 2nd k/v"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid2, err)
	}
	uuid4, err := datastore.NewVersion(uuid3, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid3, err)
	}

	// Change the 2nd k/v
	uuid4val := "we are reintroducing this k/v"
	uuid4req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid4, data.DataName(), key2)
	server.TestHTTP(t, "POST", uuid4req, strings.NewReader(uuid4val))

	if err = datastore.Commit(uuid4, "commit node 4", []string{"we modified stuff"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid4, err)
	}

	// Make sure the 2nd k/v is correct for each of previous versions.
	returnValue = server.TestHTTP(t, "GET", key2req, nil)
	if string(returnValue) != value2 {
		t.Errorf("Error on first version, key %q: expected %s, got %s\n", key2, value2, string(returnValue))
	}
	returnValue = server.TestHTTP(t, "GET", uuid2req, nil)
	if string(returnValue) != uuid2val {
		t.Errorf("Error on second version, key %q: expected %s, got %s\n", key2, uuid2val, string(returnValue))
	}
	server.TestBadHTTP(t, "GET", uuid3req, nil)
	returnValue = server.TestHTTP(t, "GET", uuid4req, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on fourth version, key %q: expected %s, got %s\n", key2, uuid4val, string(returnValue))
	}

	// Let's try a merge!

	// Make a child off the 2nd version from root.
	uuid5, err := datastore.NewVersion(uuid2, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid2, err)
	}

	// Store new stuff in 2nd k/v
	uuid5val := "this is forked value"
	uuid5req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid5, data.DataName(), key2)
	server.TestHTTP(t, "POST", uuid5req, strings.NewReader(uuid5val))

	returnValue = server.TestHTTP(t, "GET", uuid5req, nil)
	if string(returnValue) != uuid5val {
		t.Errorf("Error on merged child, key %q: expected %q, got %q\n", key2, uuid5val, string(returnValue))
	}

	// Commit node
	if err = datastore.Commit(uuid5, "forked node", []string{"we modified stuff"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid5, err)
	}

	// Should be able to merge using conflict-free (disjoint at key level) merge even though
	// its conflicted.  Will get lazy error on request.
	badChild, err := datastore.Merge([]dvid.UUID{uuid4, uuid5}, "some child", datastore.MergeConflictFree)
	if err != nil {
		t.Errorf("Error doing merge: %v\n", err)
	}
	childreq := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, badChild, data.DataName(), key2)
	server.TestBadHTTP(t, "GET", childreq, nil)

	// Manually fix conflict: Branch, and then delete 2nd k/v and commit.
	uuid6, err := datastore.NewVersion(uuid5, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid5, err)
	}

	uuid6req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid6, data.DataName(), key2)
	server.TestHTTP(t, "DELETE", uuid6req, nil)
	server.TestBadHTTP(t, "GET", uuid6req, nil)

	if err = datastore.Commit(uuid6, "deleted forked node 2nd k/v", []string{"we modified stuff"}); err != nil {
		t.Errorf("Unable to commit node %s: %s\n", uuid6, err)
	}

	// Should now be able to correctly merge the two branches.
	goodChild, err := datastore.Merge([]dvid.UUID{uuid4, uuid6}, "merging stuff", datastore.MergeConflictFree)
	if err != nil {
		t.Errorf("Error doing merge: %v\n", err)
	}

	// We should be able to see just the original uuid4 value of the 2nd k/v
	childreq = fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, goodChild, data.DataName(), key2)
	returnValue = server.TestHTTP(t, "GET", childreq, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on merged child, key %q: expected %q, got %q\n", key2, uuid4val, string(returnValue))
	}

	// Apply the automatic conflict resolution using ordering.
	payload := fmt.Sprintf(`{"data":["versiontest"],"parents":[%q,%q],"note":"automatic resolved merge"}`, uuid5, uuid4)
	resolveReq := fmt.Sprintf("%srepo/%s/resolve", server.WebAPIPath, uuid4)
	returnValue = server.TestHTTP(t, "POST", resolveReq, bytes.NewBufferString(payload))
	resolveResp := struct {
		Child dvid.UUID `json:"child"`
	}{}
	if err := json.Unmarshal(returnValue, &resolveResp); err != nil {
		t.Fatalf("Can't parse return of resolve request: %s\n", string(returnValue))
	}

	// We should now see the uuid5 version of the 2nd k/v in the returned merged node.
	childreq = fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, resolveResp.Child, data.DataName(), key2)
	returnValue = server.TestHTTP(t, "GET", childreq, nil)
	if string(returnValue) != uuid5val {
		t.Errorf("Error on auto merged child, key %q: expected %q, got %q\n", key2, uuid5val, string(returnValue))
	}

	// Introduce a child off root but don't add 2nd k/v to it.
	uuid7, err := datastore.NewVersion(uuid, "2nd child off root", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid, err)
	}
	if err = datastore.Commit(uuid7, "useless node", []string{"we modified nothing!"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid7, err)
	}

	// Now merge the previously merged node with the newly created "blank" child off root.
	if err = datastore.Commit(goodChild, "this was a good merge", []string{}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", goodChild, err)
	}
	merge2, err := datastore.Merge([]dvid.UUID{goodChild, uuid7}, "merging a useless path", datastore.MergeConflictFree)
	if err != nil {
		t.Errorf("Error doing merge: %v\n", err)
	}
	merge3, err := datastore.Merge([]dvid.UUID{uuid7, goodChild}, "merging a useless path in reverse order", datastore.MergeConflictFree)
	if err != nil {
		t.Errorf("Error doing merge: %v\n", err)
	}

	// We should still be conflict free since 2nd key in left parent path will take precedent over shared 2nd key
	// in root.  This tests our invalidation of ancestors.
	toughreq := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, merge2, data.DataName(), key2)
	returnValue = server.TestHTTP(t, "GET", toughreq, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on merged child, key %q: expected %q, got %q\n", key2, uuid4val, string(returnValue))
	}
	toughreq = fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, merge3, data.DataName(), key2)
	returnValue = server.TestHTTP(t, "GET", toughreq, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on merged child, key %q: expected %q, got %q\n", key2, uuid4val, string(returnValue))
	}
}
Example #4
0
func TestKeyvalueUnversioned(t *testing.T) {
	datastore.OpenTest()
	defer datastore.CloseTest()

	uuid, _ := initTestRepo()

	config := dvid.NewConfig()
	config.Set("versioned", "false")
	dataservice, err := datastore.NewData(uuid, kvtype, "unversiontest", config)
	if err != nil {
		t.Fatalf("Error creating new keyvalue instance: %v\n", err)
	}
	data, ok := dataservice.(*Data)
	if !ok {
		t.Fatalf("Returned new data instance is not roi.Data\n")
	}

	// PUT a value
	key1 := "mykey"
	value1 := "some stuff"
	key1req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid, data.DataName(), key1)
	server.TestHTTP(t, "POST", key1req, strings.NewReader(value1))

	// Add 2nd k/v
	key2 := "my2ndkey"
	value2 := "more good stuff"
	key2req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid, data.DataName(), key2)
	server.TestHTTP(t, "POST", key2req, strings.NewReader(value2))

	// Create a new version in repo
	if err = datastore.Commit(uuid, "my commit msg", []string{"stuff one", "stuff two"}); err != nil {
		t.Errorf("Unable to lock root node %s: %v\n", uuid, err)
	}
	uuid2, err := datastore.NewVersion(uuid, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid, err)
	}
	_, err = datastore.VersionFromUUID(uuid2)
	if err != nil {
		t.Fatalf("Unable to get version ID from new uuid %s: %v\n", uuid2, err)
	}

	// Change the 2nd k/v
	uuid2val := "this is completely different"
	uuid2req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid2, data.DataName(), key2)
	server.TestHTTP(t, "POST", uuid2req, strings.NewReader(uuid2val))

	// Now the first version value should equal the new value
	returnValue := server.TestHTTP(t, "GET", key2req, nil)
	if string(returnValue) != uuid2val {
		t.Errorf("Error on unversioned key %q: expected %s, got %s\n", key2, uuid2val, string(returnValue))
	}

	// Get the second version value
	returnValue = server.TestHTTP(t, "GET", uuid2req, nil)
	if string(returnValue) != uuid2val {
		t.Errorf("Error on unversioned key %q: expected %s, got %s\n", key2, uuid2val, string(returnValue))
	}

	// Check return of first two keys in range.
	rangereq := fmt.Sprintf("%snode/%s/%s/keyrange/%s/%s", server.WebAPIPath, uuid, data.DataName(),
		"my", "zebra")
	returnValue = server.TestHTTP(t, "GET", rangereq, nil)

	var retrievedKeys []string
	if err = json.Unmarshal(returnValue, &retrievedKeys); err != nil {
		t.Errorf("Bad key range request unmarshal: %v\n", err)
	}
	if len(retrievedKeys) != 2 || retrievedKeys[1] != "mykey" && retrievedKeys[0] != "my2ndKey" {
		t.Errorf("Bad key range request return.  Expected: [%q,%q].  Got: %s\n",
			key1, key2, string(returnValue))
	}

	// Commit the repo
	if err = datastore.Commit(uuid2, "my 2nd commit msg", []string{"changed 2nd k/v"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid2, err)
	}

	// Make grandchild of root
	uuid3, err := datastore.NewVersion(uuid2, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid2, err)
	}

	// Delete the 2nd k/v
	uuid3req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid3, data.DataName(), key2)
	server.TestHTTP(t, "DELETE", uuid3req, nil)

	server.TestBadHTTP(t, "GET", uuid3req, nil)

	// Make sure the 2nd k/v is now missing for previous versions.
	server.TestBadHTTP(t, "GET", key2req, nil)
	server.TestBadHTTP(t, "GET", uuid2req, nil)

	// Make a child
	if err = datastore.Commit(uuid3, "my 3rd commit msg", []string{"deleted 2nd k/v"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid2, err)
	}
	uuid4, err := datastore.NewVersion(uuid3, "some child", nil)
	if err != nil {
		t.Fatalf("Unable to create new version off node %s: %v\n", uuid3, err)
	}

	// Change the 2nd k/v
	uuid4val := "we are reintroducing this k/v"
	uuid4req := fmt.Sprintf("%snode/%s/%s/key/%s", server.WebAPIPath, uuid4, data.DataName(), key2)
	server.TestHTTP(t, "POST", uuid4req, strings.NewReader(uuid4val))

	if err = datastore.Commit(uuid4, "commit node 4", []string{"we modified stuff"}); err != nil {
		t.Errorf("Unable to commit node %s: %v\n", uuid4, err)
	}

	// Make sure the 2nd k/v is correct for each of previous versions.
	returnValue = server.TestHTTP(t, "GET", key2req, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on first version, key %q: expected %s, got %s\n", key2, uuid4val, string(returnValue))
	}
	returnValue = server.TestHTTP(t, "GET", uuid2req, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on second version, key %q: expected %s, got %s\n", key2, uuid4val, string(returnValue))
	}
	returnValue = server.TestHTTP(t, "GET", uuid3req, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on third version, key %q: expected %s, got %s\n", key2, uuid4val, string(returnValue))
	}
	returnValue = server.TestHTTP(t, "GET", uuid4req, nil)
	if string(returnValue) != uuid4val {
		t.Errorf("Error on fourth version, key %q: expected %s, got %s\n", key2, uuid4val, string(returnValue))
	}
}
Example #5
0
// 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
}
Example #6
0
// 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
}