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package transaction
import (
"context"
"errors"
"gitlab.com/gitlab-org/gitaly/v16/internal/praefect/transactions"
"gitlab.com/gitlab-org/gitaly/v16/internal/structerr"
"gitlab.com/gitlab-org/gitaly/v16/internal/transaction/voting"
"gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb"
)
//nolint:revive // This is unintentionally missing documentation.
type Server struct {
gitalypb.UnimplementedRefTransactionServer
txMgr *transactions.Manager
}
//nolint:revive // This is unintentionally missing documentation.
func NewServer(txMgr *transactions.Manager) gitalypb.RefTransactionServer {
return &Server{
txMgr: txMgr,
}
}
// VoteTransaction is called by a client who's casting a vote on a reference
// transaction, blocking until a vote across all participating nodes has been
// completed.
func (s *Server) VoteTransaction(ctx context.Context, in *gitalypb.VoteTransactionRequest) (*gitalypb.VoteTransactionResponse, error) {
vote, err := voting.VoteFromHash(in.GetReferenceUpdatesHash())
if err != nil {
return nil, structerr.NewInvalidArgument("invalid reference update hash: %v", err)
}
if err := s.txMgr.VoteTransaction(ctx, in.TransactionId, in.Node, vote); err != nil {
switch {
case errors.Is(err, transactions.ErrNotFound):
return nil, structerr.NewNotFound("%w", err)
case errors.Is(err, transactions.ErrTransactionCanceled):
return nil, structerr.NewCanceled("%w", err)
case errors.Is(err, transactions.ErrTransactionStopped):
return &gitalypb.VoteTransactionResponse{
State: gitalypb.VoteTransactionResponse_STOP,
}, nil
case errors.Is(err, transactions.ErrTransactionFailed):
return &gitalypb.VoteTransactionResponse{
State: gitalypb.VoteTransactionResponse_ABORT,
}, nil
default:
return nil, structerr.NewInternal("%w", err)
}
}
return &gitalypb.VoteTransactionResponse{
State: gitalypb.VoteTransactionResponse_COMMIT,
}, nil
}
// StopTransaction is called by a client who wants to gracefully stop a
// transaction. All voters waiting for quorum will be stopped and new votes
// will not get accepted anymore. It is fine to call this RPC multiple times on
// the same transaction.
func (s *Server) StopTransaction(ctx context.Context, in *gitalypb.StopTransactionRequest) (*gitalypb.StopTransactionResponse, error) {
if err := s.txMgr.StopTransaction(ctx, in.TransactionId); err != nil {
switch {
case errors.Is(err, transactions.ErrNotFound):
return nil, structerr.NewNotFound("%w", err)
case errors.Is(err, transactions.ErrTransactionCanceled):
return nil, structerr.NewCanceled("%w", err)
case errors.Is(err, transactions.ErrTransactionStopped):
return &gitalypb.StopTransactionResponse{}, nil
default:
return nil, structerr.NewInternal("%w", err)
}
}
return &gitalypb.StopTransactionResponse{}, nil
}
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