github.com/hechain20/hechain@v0.0.0-20220316014945-b544036ba106/core/ledger/kvledger/drop_dbs.go (about)

     1  /*
     2  Copyright hechain. All Rights Reserved.
     3  
     4  SPDX-License-Identifier: Apache-2.0
     5  */
     6  
     7  package kvledger
     8  
     9  import "github.com/hechain20/hechain/internal/fileutil"
    10  
    11  func dropDBs(rootFSPath string) error {
    12  	// During block commits to stateDB, the transaction manager updates the bookkeeperDB and one of the
    13  	// state listener updates the config historyDB. As we drop the stateDB, we need to drop the
    14  	// configHistoryDB and bookkeeperDB too so that during the peer startup after the reset/rollback,
    15  	// we can get a correct configHistoryDB.
    16  	// Note that it is necessary to drop the stateDB first before dropping the config history and
    17  	// bookkeeper. Suppose if the config or bookkeeper is dropped first and the peer reset/rollback
    18  	// command fails before dropping the stateDB, peer cannot start with consistent data (if the
    19  	// user decides to start the peer without retrying the reset/rollback) as the stateDB would
    20  	// not be rebuilt.
    21  	if err := dropStateLevelDB(rootFSPath); err != nil {
    22  		return err
    23  	}
    24  	if err := dropConfigHistoryDB(rootFSPath); err != nil {
    25  		return err
    26  	}
    27  	if err := dropBookkeeperDB(rootFSPath); err != nil {
    28  		return err
    29  	}
    30  	return dropHistoryDB(rootFSPath)
    31  }
    32  
    33  func dropStateLevelDB(rootFSPath string) error {
    34  	stateLeveldbPath := StateDBPath(rootFSPath)
    35  	logger.Infof("Dropping all contents in StateLevelDB at location [%s] ...if present", stateLeveldbPath)
    36  	return fileutil.RemoveContents(stateLeveldbPath)
    37  }
    38  
    39  func dropConfigHistoryDB(rootFSPath string) error {
    40  	configHistoryDBPath := ConfigHistoryDBPath(rootFSPath)
    41  	logger.Infof("Dropping all contents in ConfigHistoryDB at location [%s] ...if present", configHistoryDBPath)
    42  	return fileutil.RemoveContents(configHistoryDBPath)
    43  }
    44  
    45  func dropBookkeeperDB(rootFSPath string) error {
    46  	bookkeeperDBPath := BookkeeperDBPath(rootFSPath)
    47  	logger.Infof("Dropping all contents in BookkeeperDB at location [%s] ...if present", bookkeeperDBPath)
    48  	return fileutil.RemoveContents(bookkeeperDBPath)
    49  }
    50  
    51  func dropHistoryDB(rootFSPath string) error {
    52  	historyDBPath := HistoryDBPath(rootFSPath)
    53  	logger.Infof("Dropping all contents under in HistoryDB at location [%s] ...if present", historyDBPath)
    54  	return fileutil.RemoveContents(historyDBPath)
    55  }