Golang BatchRequest.UserPriority方法代碼示例

func (ts *txnSender) Send(ctx context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
	// Send call through wrapped sender.
	ba.Txn = &ts.Proto
	if ts.UserPriority > 0 {
		ba.UserPriority = ts.UserPriority
	}
	ba.SetNewRequest()
	br, pErr := ts.wrapped.Send(ctx, ba)
	if br != nil && br.Error != nil {
		panic(roachpb.ErrorUnexpectedlySet(ts.wrapped, br))
	}

	// Only successful requests can carry an updated Txn in their response
	// header. Any error (e.g. a restart) can have a Txn attached to them as
	// well; those update our local state in the same way for the next attempt.
	// The exception is if our transaction was aborted and needs to restart
	// from scratch, in which case we do just that.
	if pErr == nil {
		ts.Proto.Update(br.Txn)
		return br, nil
	} else if _, ok := pErr.GetDetail().(*roachpb.TransactionAbortedError); ok {
		// On Abort, reset the transaction so we start anew on restart.
		ts.Proto = roachpb.Transaction{
			Name:      ts.Proto.Name,
			Isolation: ts.Proto.Isolation,
		}
		// Acts as a minimum priority on restart.
		if pErr.GetTxn() != nil {
			ts.Proto.Priority = pErr.GetTxn().Priority
		}
	} else if pErr.TransactionRestart != roachpb.TransactionRestart_ABORT {
		ts.Proto.Update(pErr.GetTxn())
	}
	return nil, pErr
}

// send runs the specified calls synchronously in a single batch and returns
// any errors. Returns (nil, nil) for an empty batch.
func (db *DB) send(ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
	if len(ba.Requests) == 0 {
		return nil, nil
	}
	if ba.ReadConsistency == roachpb.INCONSISTENT {
		for _, ru := range ba.Requests {
			req := ru.GetInner()
			if req.Method() != roachpb.Get && req.Method() != roachpb.Scan &&
				req.Method() != roachpb.ReverseScan {
				return nil, roachpb.NewErrorf("method %s not allowed with INCONSISTENT batch", req.Method)
			}
		}
	}

	if db.ctx.UserPriority != 1 {
		ba.UserPriority = db.ctx.UserPriority
	}

	tracing.AnnotateTrace()

	br, pErr := db.sender.Send(context.TODO(), ba)
	if pErr != nil {
		if log.V(1) {
			log.Infof("failed batch: %s", pErr)
		}
		return nil, pErr
	}
	return br, nil
}

// send runs the specified calls synchronously in a single batch and returns
// any errors. Returns a nil response for empty input (no requests).
func (db *DB) send(maxScanResults int64, readConsistency roachpb.ReadConsistencyType,
	reqs ...roachpb.Request) (*roachpb.BatchResponse, *roachpb.Error) {
	if len(reqs) == 0 {
		return nil, nil
	}

	if readConsistency == roachpb.INCONSISTENT {
		for _, req := range reqs {
			if req.Method() != roachpb.Get && req.Method() != roachpb.Scan &&
				req.Method() != roachpb.ReverseScan {
				return nil, roachpb.NewErrorf("method %s not allowed with INCONSISTENT batch", req.Method)
			}
		}
	}

	ba := roachpb.BatchRequest{}
	ba.Add(reqs...)

	ba.MaxScanResults = maxScanResults
	if db.userPriority != 1 {
		ba.UserPriority = db.userPriority
	}
	ba.ReadConsistency = readConsistency

	tracing.AnnotateTrace()

	br, pErr := db.sender.Send(context.TODO(), ba)
	if pErr != nil {
		if log.V(1) {
			log.Infof("failed batch: %s", pErr)
		}
		return nil, pErr
	}
	return br, nil
}

// send runs the specified calls synchronously in a single batch and returns
// any errors. Returns a nil response for empty input (no requests).
func (db *DB) send(maxScanResults int64, reqs ...roachpb.Request) (
	*roachpb.BatchResponse, *roachpb.Error) {
	if len(reqs) == 0 {
		return nil, nil
	}

	ba := roachpb.BatchRequest{}
	ba.Add(reqs...)

	ba.MaxScanResults = maxScanResults
	if db.userPriority != 1 {
		ba.UserPriority = db.userPriority
	}

	tracing.AnnotateTrace()

	br, pErr := db.sender.Send(context.TODO(), ba)
	if pErr != nil {
		if log.V(1) {
			log.Infof("failed batch: %s", pErr)
		}
		return nil, pErr
	}
	return br, nil
}

// Send updates the transaction on error. Depending on the error type, the
// transaction might be replaced by a new one.
func (ts *txnSender) Send(ctx context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
	// Send call through wrapped sender.
	ba.Txn = &ts.Proto
	// For testing purposes, ts.UserPriority can be a negative value (see
	// MakePriority).
	if ts.UserPriority != 0 {
		ba.UserPriority = ts.UserPriority
	}

	br, pErr := ts.wrapped.Send(ts.Context, ba)
	if br != nil && br.Error != nil {
		panic(roachpb.ErrorUnexpectedlySet(ts.wrapped, br))
	}

	if br != nil {
		for _, encSp := range br.CollectedSpans {
			var newSp basictracer.RawSpan
			if err := tracing.DecodeRawSpan(encSp, &newSp); err != nil {
				return nil, roachpb.NewError(err)
			}
			ts.CollectedSpans = append(ts.CollectedSpans, newSp)
		}
	}
	// Only successful requests can carry an updated Txn in their response
	// header. Any error (e.g. a restart) can have a Txn attached to them as
	// well; those update our local state in the same way for the next attempt.
	// The exception is if our transaction was aborted and needs to restart
	// from scratch, in which case we do just that.
	if pErr == nil {
		ts.Proto.Update(br.Txn)
		return br, nil
	} else if _, ok := pErr.GetDetail().(*roachpb.TransactionAbortedError); ok {
		// On Abort, reset the transaction so we start anew on restart.
		ts.Proto = roachpb.Transaction{
			TxnMeta: roachpb.TxnMeta{
				Isolation: ts.Proto.Isolation,
			},
			Name: ts.Proto.Name,
		}
		// Acts as a minimum priority on restart.
		if pErr.GetTxn() != nil {
			ts.Proto.Priority = pErr.GetTxn().Priority
		}
	} else if pErr.TransactionRestart != roachpb.TransactionRestart_NONE {
		ts.Proto.Update(pErr.GetTxn())
	}
	return nil, pErr
}

// send runs the specified calls synchronously in a single batch and returns
// any errors. Returns a nil response for empty input (no requests).
func (db *DB) send(reqs ...roachpb.Request) (*roachpb.BatchResponse, *roachpb.Error) {
	if len(reqs) == 0 {
		return nil, nil
	}

	ba := roachpb.BatchRequest{}
	ba.Add(reqs...)

	if ba.UserPriority == 0 && db.userPriority != 1 {
		ba.UserPriority = db.userPriority
	}
	br, pErr := db.sender.Send(context.TODO(), ba)
	if pErr != nil {
		if log.V(1) {
			log.Infof("failed batch: %s", pErr)
		}
		return nil, pErr
	}
	return br, nil
}

// send runs the specified calls synchronously in a single batch and
// returns any errors.
func (db *DB) send(reqs ...roachpb.Request) (*roachpb.BatchResponse, *roachpb.Error) {
	if len(reqs) == 0 {
		return &roachpb.BatchResponse{}, nil
	}

	ba := roachpb.BatchRequest{}
	ba.Add(reqs...)

	if ba.UserPriority == nil && db.userPriority != 0 {
		ba.UserPriority = proto.Int32(db.userPriority)
	}
	resetClientCmdID(&ba)
	br, pErr := db.sender.Send(context.TODO(), ba)
	if pErr != nil {
		if log.V(1) {
			log.Infof("failed batch: %s", pErr)
		}
		return nil, pErr
	}
	return br, nil
}