github.com/weaviate/weaviate@v1.24.6/modules/text2vec-contextionary/extensions/usecase.go (about)

     1  //                           _       _
     2  // __      _____  __ ___   ___  __ _| |_ ___
     3  // \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
     4  //  \ V  V /  __/ (_| |\ V /| | (_| | ||  __/
     5  //   \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
     6  //
     7  //  Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
     8  //
     9  //  CONTACT: hello@weaviate.io
    10  //
    11  
    12  package extensions
    13  
    14  import (
    15  	"bytes"
    16  
    17  	"github.com/pkg/errors"
    18  	"github.com/weaviate/weaviate/entities/moduletools"
    19  )
    20  
    21  // UseCase handles all business logic regarding extensions
    22  type UseCase struct {
    23  	storage moduletools.Storage
    24  }
    25  
    26  func NewUseCase(storage moduletools.Storage) *UseCase {
    27  	return &UseCase{
    28  		storage: storage,
    29  	}
    30  }
    31  
    32  func (uc *UseCase) Store(concept string, value []byte) error {
    33  	err := uc.storage.Put([]byte(concept), value)
    34  	if err != nil {
    35  		return errors.Wrapf(err, "store concept %q", concept)
    36  	}
    37  
    38  	return nil
    39  }
    40  
    41  func (uc *UseCase) Load(concept string) ([]byte, error) {
    42  	val, err := uc.storage.Get([]byte(concept))
    43  	if err != nil {
    44  		return nil, errors.Wrapf(err, "load concept %q", concept)
    45  	}
    46  
    47  	return val, nil
    48  }
    49  
    50  func (uc *UseCase) LoadAll() ([]byte, error) {
    51  	buf := bytes.NewBuffer(nil)
    52  	err := uc.storage.Scan(func(k, v []byte) (bool, error) {
    53  		_, err := buf.Write(v)
    54  		if err != nil {
    55  			return false, errors.Wrapf(err, "write concept %q", string(k))
    56  		}
    57  
    58  		_, err = buf.Write([]byte("\n"))
    59  		if err != nil {
    60  			return false, errors.Wrap(err, "write newline separator")
    61  		}
    62  
    63  		return true, nil
    64  	})
    65  	if err != nil {
    66  		return nil, errors.Wrap(err, "load all concepts")
    67  	}
    68  
    69  	return buf.Bytes(), nil
    70  }