github.com/matrixorigin/matrixone@v1.2.0/pkg/udf/service.go (about)

     1  // Copyright 2023 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package udf
    16  
    17  import (
    18  	"context"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    21  )
    22  
    23  func NewService(services ...Service) (Service, error) {
    24  	srv := &service{}
    25  	srv.mapping = make(map[string]Service, len(services))
    26  	for _, s := range services {
    27  		if srv.mapping[s.Language()] == nil {
    28  			srv.mapping[s.Language()] = s
    29  		} else {
    30  			return nil, moerr.NewInternalErrorNoCtx("too many " + s.Language() + " udf service")
    31  		}
    32  	}
    33  	return srv, nil
    34  }
    35  
    36  type service struct {
    37  	mapping map[string]Service
    38  }
    39  
    40  func (s *service) Language() string {
    41  	return "multiple"
    42  }
    43  
    44  func (s *service) Run(ctx context.Context, request *Request, pkgReader PkgReader) (*Response, error) {
    45  	srv := s.mapping[request.Udf.Language]
    46  	if srv == nil {
    47  		return nil, moerr.NewInternalError(ctx, "missing "+request.Udf.Language+" udf service")
    48  	}
    49  	return srv.Run(ctx, request, pkgReader)
    50  }