/
transaction.go
147 lines (113 loc) · 3.64 KB
/
transaction.go
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package clouddatastore
import (
"context"
"cloud.google.com/go/datastore"
w "go.mercari.io/datastore"
"go.mercari.io/datastore/internal/shared"
)
var _ w.Transaction = (*transactionImpl)(nil)
var _ w.Commit = (*commitImpl)(nil)
type contextTransaction struct{}
func getTx(ctx context.Context) *datastore.Transaction {
tx := ctx.Value(contextTransaction{})
if tx != nil {
return tx.(*datastore.Transaction)
}
return nil
}
type transactionImpl struct {
client *datastoreImpl
cacheInfo *w.MiddlewareInfo
}
type commitImpl struct {
commit *datastore.Commit
}
func (tx *transactionImpl) Get(key w.Key, dst interface{}) error {
err := tx.GetMulti([]w.Key{key}, []interface{}{dst})
if merr, ok := err.(w.MultiError); ok {
return merr[0]
} else if err != nil {
return err
}
return nil
}
func (tx *transactionImpl) GetMulti(keys []w.Key, dst interface{}) error {
cb := shared.NewCacheBridge(tx.cacheInfo, &originalClientBridgeImpl{tx.client}, &originalTransactionBridgeImpl{tx: tx}, nil, tx.client.middlewares)
err := shared.GetMultiOps(tx.client.ctx, keys, dst, func(keys []w.Key, dst []w.PropertyList) error {
return cb.GetMultiWithTx(tx.cacheInfo, keys, dst)
})
return err
}
func (tx *transactionImpl) Put(key w.Key, src interface{}) (w.PendingKey, error) {
pKeys, err := tx.PutMulti([]w.Key{key}, []interface{}{src})
if merr, ok := err.(w.MultiError); ok {
return nil, merr[0]
} else if err != nil {
return nil, err
}
return pKeys[0], nil
}
func (tx *transactionImpl) PutMulti(keys []w.Key, src interface{}) ([]w.PendingKey, error) {
cb := shared.NewCacheBridge(tx.cacheInfo, &originalClientBridgeImpl{tx.client}, &originalTransactionBridgeImpl{tx: tx}, nil, tx.client.middlewares)
_, pKeys, err := shared.PutMultiOps(tx.client.ctx, keys, src, func(keys []w.Key, src []w.PropertyList) ([]w.Key, []w.PendingKey, error) {
pKeys, err := cb.PutMultiWithTx(tx.cacheInfo, keys, src)
return nil, pKeys, err
})
if err != nil {
return nil, err
}
return pKeys, nil
}
func (tx *transactionImpl) Delete(key w.Key) error {
err := tx.DeleteMulti([]w.Key{key})
if merr, ok := err.(w.MultiError); ok {
return merr[0]
} else if err != nil {
return err
}
return nil
}
func (tx *transactionImpl) DeleteMulti(keys []w.Key) error {
cb := shared.NewCacheBridge(tx.cacheInfo, &originalClientBridgeImpl{tx.client}, &originalTransactionBridgeImpl{tx: tx}, nil, tx.client.middlewares)
err := shared.DeleteMultiOps(tx.client.ctx, keys, func(keys []w.Key) error {
return cb.DeleteMultiWithTx(tx.cacheInfo, keys)
})
return err
}
func (tx *transactionImpl) Commit() (w.Commit, error) {
baseTx := getTx(tx.client.ctx)
if baseTx == nil {
return nil, nil
}
commit, err := baseTx.Commit()
if err != nil {
return nil, toWrapperError(err)
}
cb := shared.NewCacheBridge(tx.cacheInfo, &originalClientBridgeImpl{tx.client}, &originalTransactionBridgeImpl{tx: tx}, nil, tx.client.middlewares)
commitImpl := &commitImpl{commit}
err = cb.PostCommit(tx.cacheInfo, tx, commitImpl)
if err != nil {
return nil, err
}
return commitImpl, nil
}
func (tx *transactionImpl) Rollback() error {
baseTx := getTx(tx.client.ctx)
if tx == nil {
return nil
}
err := baseTx.Rollback()
if err != nil {
return toWrapperError(err)
}
cb := shared.NewCacheBridge(tx.cacheInfo, &originalClientBridgeImpl{tx.client}, &originalTransactionBridgeImpl{tx: tx}, nil, tx.client.middlewares)
return cb.PostRollback(tx.cacheInfo, tx)
}
func (tx *transactionImpl) Batch() *w.TransactionBatch {
return &w.TransactionBatch{Transaction: tx}
}
func (c *commitImpl) Key(p w.PendingKey) w.Key {
pk := toOriginalPendingKey(p)
key := c.commit.Key(pk)
return toWrapperKey(key)
}