github.com/olivere/camlistore@v0.0.0-20140121221811-1b7ac2da0199/pkg/test/loader.go (about)

     1  /*
     2  Copyright 2014 The Camlistore Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8       http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package test
    18  
    19  import (
    20  	"errors"
    21  	"log"
    22  	"strings"
    23  	"sync"
    24  
    25  	"camlistore.org/pkg/blobserver"
    26  )
    27  
    28  // NewLoader
    29  func NewLoader() *Loader {
    30  	return &Loader{}
    31  }
    32  
    33  type Loader struct {
    34  	mu  sync.Mutex
    35  	sto map[string]blobserver.Storage
    36  }
    37  
    38  var _ blobserver.Loader = (*Loader)(nil)
    39  
    40  func (ld *Loader) FindHandlerByType(handlerType string) (prefix string, handler interface{}, err error) {
    41  	panic("NOIMPL")
    42  }
    43  
    44  func (ld *Loader) MyPrefix() string {
    45  	return "/lies/"
    46  }
    47  
    48  func (ld *Loader) GetHandlerType(prefix string) string {
    49  	log.Printf("test.Loader: GetHandlerType called but not implemented.")
    50  	return ""
    51  }
    52  
    53  func (ld *Loader) GetHandler(prefix string) (interface{}, error) {
    54  	log.Printf("test.Loader: GetHandler called but not implemented.")
    55  	return nil, errors.New("doesn't exist")
    56  }
    57  
    58  func (ld *Loader) SetStorage(prefix string, s blobserver.Storage) {
    59  	ld.mu.Lock()
    60  	defer ld.mu.Unlock()
    61  	if ld.sto == nil {
    62  		ld.sto = make(map[string]blobserver.Storage)
    63  	}
    64  	ld.sto[prefix] = s
    65  }
    66  
    67  func (ld *Loader) GetStorage(prefix string) (blobserver.Storage, error) {
    68  	ld.mu.Lock()
    69  	defer ld.mu.Unlock()
    70  	if bs, ok := ld.sto[prefix]; ok {
    71  		return bs, nil
    72  	}
    73  	if ld.sto == nil {
    74  		ld.sto = make(map[string]blobserver.Storage)
    75  	}
    76  	sto, err := ld.genStorage(prefix)
    77  	if err != nil {
    78  		return nil, err
    79  	}
    80  	ld.sto[prefix] = sto
    81  	return sto, nil
    82  }
    83  
    84  func (ld *Loader) genStorage(prefix string) (blobserver.Storage, error) {
    85  	if strings.HasPrefix(prefix, "/good") {
    86  		return &Fetcher{}, nil
    87  	}
    88  	if strings.HasPrefix(prefix, "/fail") {
    89  		return &Fetcher{ReceiveErr: errors.New("test.Loader intentional failure for /fail storage handler")}, nil
    90  	}
    91  	panic("test.Loader.GetStorage: unrecognized prefix type")
    92  }