github.com/vicanso/pike@v1.0.1-0.20210630235453-9099e041f6ec/store/store.go (about)

     1  // MIT License
     2  
     3  // Copyright (c) 2021 Tree Xie
     4  
     5  // Permission is hereby granted, free of charge, to any person obtaining a copy
     6  // of this software and associated documentation files (the "Software"), to deal
     7  // in the Software without restriction, including without limitation the rights
     8  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     9  // copies of the Software, and to permit persons to whom the Software is
    10  // furnished to do so, subject to the following conditions:
    11  
    12  // The above copyright notice and this permission notice shall be included in all
    13  // copies or substantial portions of the Software.
    14  
    15  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    16  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    17  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    18  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    19  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    20  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    21  // SOFTWARE.
    22  
    23  package store
    24  
    25  import (
    26  	"errors"
    27  	"net/url"
    28  	"sync"
    29  	"time"
    30  
    31  	"github.com/vicanso/hes"
    32  	"github.com/vicanso/pike/log"
    33  	"go.uber.org/zap"
    34  )
    35  
    36  type Store interface {
    37  	// Get get data from store
    38  	Get(key []byte) (data []byte, err error)
    39  	// Set set data from store
    40  	Set(key []byte, data []byte, ttl time.Duration) (err error)
    41  	// Delete delete data from store
    42  	Delete(key []byte) (err error)
    43  	// Close close the store
    44  	Close() error
    45  }
    46  
    47  var ErrNotFound = errors.New("Not found")
    48  
    49  var stores = sync.Map{}
    50  
    51  var newStoreLock = sync.Mutex{}
    52  
    53  // NewStore create a new store
    54  func NewStore(storeURL string) (store Store, err error) {
    55  	// 保证new store只允许一个实例操作
    56  	newStoreLock.Lock()
    57  	defer newStoreLock.Unlock()
    58  
    59  	// 如果该store已存在，直接返回
    60  	store = GetStore(storeURL)
    61  	if store != nil {
    62  		return
    63  	}
    64  
    65  	// 初始化新的store
    66  	urlInfo, err := url.Parse(storeURL)
    67  	if err != nil {
    68  		return
    69  	}
    70  	switch urlInfo.Scheme {
    71  	case "badger":
    72  		store, err = newBadgerStore(urlInfo.Path)
    73  		if err != nil {
    74  			return
    75  		}
    76  	case "redis":
    77  		store, err = newRedisStore(storeURL)
    78  		if err != nil {
    79  			return
    80  		}
    81  	case "mongodb":
    82  		store, err = newMongoStore(storeURL)
    83  		if err != nil {
    84  			return
    85  		}
    86  	}
    87  	// 保存store
    88  	if store != nil {
    89  		stores.Store(storeURL, store)
    90  	}
    91  	return
    92  }
    93  
    94  // GetStore get store
    95  func GetStore(storeURL string) Store {
    96  	value, ok := stores.Load(storeURL)
    97  	if !ok {
    98  		return nil
    99  	}
   100  	s, ok := value.(Store)
   101  	if !ok {
   102  		return nil
   103  	}
   104  	return s
   105  }
   106  
   107  // Close close stores
   108  func Close() error {
   109  	he := &hes.Error{
   110  		Message: "close stores fail",
   111  	}
   112  	stores.Range(func(_ interface{}, value interface{}) bool {
   113  		err := value.(Store).Close()
   114  		if err != nil {
   115  			he.Add(err)
   116  		}
   117  		return true
   118  	})
   119  	if he.IsNotEmpty() {
   120  		// 由于close是在程序退出时调用，因此如果失败，则先输出出错日志再返回出错
   121  		log.Default().Error("close stores fail",
   122  			zap.Error(he),
   123  		)
   124  		return he
   125  	}
   126  	return nil
   127  }