github.com/sberex/go-sberex@v1.8.2-0.20181113200658-ed96ac38f7d7/cmd/swarm/db.go (about)

     1  // This file is part of the go-sberex library. The go-sberex library is 
     2  // free software: you can redistribute it and/or modify it under the terms 
     3  // of the GNU Lesser General Public License as published by the Free 
     4  // Software Foundation, either version 3 of the License, or (at your option)
     5  // any later version.
     6  //
     7  // The go-sberex library is distributed in the hope that it will be useful, 
     8  // but WITHOUT ANY WARRANTY; without even the implied warranty of
     9  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 
    10  // General Public License <http://www.gnu.org/licenses/> for more details.
    11  
    12  package main
    13  
    14  import (
    15  	"fmt"
    16  	"io"
    17  	"os"
    18  	"path/filepath"
    19  
    20  	"github.com/Sberex/go-sberex/cmd/utils"
    21  	"github.com/Sberex/go-sberex/log"
    22  	"github.com/Sberex/go-sberex/swarm/storage"
    23  	"gopkg.in/urfave/cli.v1"
    24  )
    25  
    26  func dbExport(ctx *cli.Context) {
    27  	args := ctx.Args()
    28  	if len(args) != 2 {
    29  		utils.Fatalf("invalid arguments, please specify both <chunkdb> (path to a local chunk database) and <file> (path to write the tar archive to, - for stdout)")
    30  	}
    31  
    32  	store, err := openDbStore(args[0])
    33  	if err != nil {
    34  		utils.Fatalf("error opening local chunk database: %s", err)
    35  	}
    36  	defer store.Close()
    37  
    38  	var out io.Writer
    39  	if args[1] == "-" {
    40  		out = os.Stdout
    41  	} else {
    42  		f, err := os.Create(args[1])
    43  		if err != nil {
    44  			utils.Fatalf("error opening output file: %s", err)
    45  		}
    46  		defer f.Close()
    47  		out = f
    48  	}
    49  
    50  	count, err := store.Export(out)
    51  	if err != nil {
    52  		utils.Fatalf("error exporting local chunk database: %s", err)
    53  	}
    54  
    55  	log.Info(fmt.Sprintf("successfully exported %d chunks", count))
    56  }
    57  
    58  func dbImport(ctx *cli.Context) {
    59  	args := ctx.Args()
    60  	if len(args) != 2 {
    61  		utils.Fatalf("invalid arguments, please specify both <chunkdb> (path to a local chunk database) and <file> (path to read the tar archive from, - for stdin)")
    62  	}
    63  
    64  	store, err := openDbStore(args[0])
    65  	if err != nil {
    66  		utils.Fatalf("error opening local chunk database: %s", err)
    67  	}
    68  	defer store.Close()
    69  
    70  	var in io.Reader
    71  	if args[1] == "-" {
    72  		in = os.Stdin
    73  	} else {
    74  		f, err := os.Open(args[1])
    75  		if err != nil {
    76  			utils.Fatalf("error opening input file: %s", err)
    77  		}
    78  		defer f.Close()
    79  		in = f
    80  	}
    81  
    82  	count, err := store.Import(in)
    83  	if err != nil {
    84  		utils.Fatalf("error importing local chunk database: %s", err)
    85  	}
    86  
    87  	log.Info(fmt.Sprintf("successfully imported %d chunks", count))
    88  }
    89  
    90  func dbClean(ctx *cli.Context) {
    91  	args := ctx.Args()
    92  	if len(args) != 1 {
    93  		utils.Fatalf("invalid arguments, please specify <chunkdb> (path to a local chunk database)")
    94  	}
    95  
    96  	store, err := openDbStore(args[0])
    97  	if err != nil {
    98  		utils.Fatalf("error opening local chunk database: %s", err)
    99  	}
   100  	defer store.Close()
   101  
   102  	store.Cleanup()
   103  }
   104  
   105  func openDbStore(path string) (*storage.DbStore, error) {
   106  	if _, err := os.Stat(filepath.Join(path, "CURRENT")); err != nil {
   107  		return nil, fmt.Errorf("invalid chunkdb path: %s", err)
   108  	}
   109  	hash := storage.MakeHashFunc("SHA3")
   110  	return storage.NewDbStore(path, hash, 10000000, 0)
   111  }