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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package clusterapi
import (
"context"
"encoding/json"
"net/http"
"strings"
"time"
"github.com/pkg/errors"
"github.com/weaviate/weaviate/usecases/cluster"
ucs "github.com/weaviate/weaviate/usecases/schema"
)
type txManager interface {
IncomingBeginTransaction(ctx context.Context, tx *cluster.Transaction) ([]byte, error)
IncomingCommitTransaction(ctx context.Context, tx *cluster.Transaction) error
IncomingAbortTransaction(ctx context.Context, tx *cluster.Transaction)
}
type txPayload struct {
ID string `json:"id"`
Type cluster.TransactionType `json:"type"`
Payload json.RawMessage `json:"payload"`
DeadlineMilli int64 `json:"deadlineMilli"`
}
type txHandler struct {
manager txManager
auth auth
}
func (h *txHandler) Transactions() http.Handler {
return h.auth.handleFunc(h.transactionsHandler())
}
func (h *txHandler) transactionsHandler() http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
path := r.URL.Path
switch {
case path == "":
if r.Method != http.MethodPost {
http.Error(w, "405 Method not Allowed", http.StatusMethodNotAllowed)
return
}
h.incomingTransaction().ServeHTTP(w, r)
return
case strings.HasSuffix(path, "/commit"):
if r.Method != http.MethodPut {
http.Error(w, "405 Method not Allowed", http.StatusMethodNotAllowed)
return
}
h.incomingCommitTransaction().ServeHTTP(w, r)
return
default:
if r.Method != http.MethodDelete {
http.Error(w, "405 Method not Allowed", http.StatusMethodNotAllowed)
return
}
h.incomingAbortTransaction().ServeHTTP(w, r)
return
}
}
}
func (h *txHandler) incomingTransaction() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer r.Body.Close()
if r.Header.Get("content-type") != "application/json" {
http.Error(w, "415 Unsupported Media Type", http.StatusUnsupportedMediaType)
return
}
var payload txPayload
if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
http.Error(w, errors.Wrap(err, "decode body").Error(),
http.StatusInternalServerError)
return
}
if len(payload.ID) == 0 {
http.Error(w, "id must be set", http.StatusBadRequest)
return
}
if len(payload.Type) == 0 {
http.Error(w, "type must be set", http.StatusBadRequest)
return
}
txPayload, err := ucs.UnmarshalTransaction(payload.Type, payload.Payload)
if err != nil {
http.Error(w, errors.Wrap(err, "decode tx payload").Error(),
http.StatusInternalServerError)
return
}
txType := payload.Type
tx := &cluster.Transaction{
ID: payload.ID,
Type: txType,
Payload: txPayload,
Deadline: time.UnixMilli(payload.DeadlineMilli),
}
data, err := h.manager.IncomingBeginTransaction(r.Context(), tx)
if err != nil {
status := http.StatusInternalServerError
if errors.Is(err, cluster.ErrConcurrentTransaction) {
status = http.StatusConflict
}
http.Error(w, errors.Wrap(err, "open transaction").Error(), status)
return
}
if txType != ucs.ReadSchema {
w.WriteHeader(http.StatusCreated)
return
}
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
}
w.WriteHeader(http.StatusCreated)
w.Write(data)
})
}
func (h *txHandler) incomingAbortTransaction() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer r.Body.Close()
path := r.URL.String()
tx := &cluster.Transaction{
ID: path,
}
h.manager.IncomingAbortTransaction(r.Context(), tx)
w.WriteHeader(http.StatusNoContent)
})
}
func (h *txHandler) incomingCommitTransaction() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer r.Body.Close()
parts := strings.Split(r.URL.Path, "/")
if len(parts) != 2 {
http.NotFound(w, r)
return
}
tx := &cluster.Transaction{
ID: parts[0],
}
if err := h.manager.IncomingCommitTransaction(r.Context(), tx); err != nil {
status := http.StatusInternalServerError
if errors.Is(err, cluster.ErrConcurrentTransaction) {
status = http.StatusConflict
}
http.Error(w, errors.Wrap(err, "open transaction").Error(), status)
return
}
w.WriteHeader(http.StatusNoContent)
})
}
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