963 lines
31 KiB
Python
963 lines
31 KiB
Python
import collections
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import os
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import queue
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import sqlite3
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import traceback
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import time
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from hydrus.core import HydrusDBBase
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from hydrus.core import HydrusConstants as HC
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from hydrus.core import HydrusData
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from hydrus.core import HydrusEncryption
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from hydrus.core import HydrusExceptions
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from hydrus.core import HydrusGlobals as HG
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from hydrus.core import HydrusPaths
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from hydrus.core import HydrusProfiling
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from hydrus.core import HydrusTime
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from hydrus.core.interfaces import HydrusControllerInterface
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def CheckCanVacuum( db_path, stop_time = None ):
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db = sqlite3.connect( db_path, isolation_level = None, detect_types = sqlite3.PARSE_DECLTYPES )
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c = db.cursor()
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CheckCanVacuumCursor( db_path, c, stop_time = stop_time )
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def CheckCanVacuumCursor( db_path, c, stop_time = None ):
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( page_size, ) = c.execute( 'PRAGMA page_size;' ).fetchone()
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( page_count, ) = c.execute( 'PRAGMA page_count;' ).fetchone()
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( freelist_count, ) = c.execute( 'PRAGMA freelist_count;' ).fetchone()
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CheckCanVacuumData( db_path, page_size, page_count, freelist_count, stop_time = stop_time )
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def CheckCanVacuumData( db_path, page_size, page_count, freelist_count, stop_time = None ):
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db_size = ( page_count - freelist_count ) * page_size
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if stop_time is not None:
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approx_vacuum_duration = GetApproxVacuumDuration( db_size )
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time_i_will_have_to_start = stop_time - approx_vacuum_duration
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if HydrusTime.TimeHasPassed( time_i_will_have_to_start ):
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raise Exception( 'I believe you need about ' + HydrusTime.TimeDeltaToPrettyTimeDelta( approx_vacuum_duration ) + ' to vacuum, but there is not enough time allotted.' )
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db_dir = os.path.dirname( db_path )
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HydrusDBBase.CheckHasSpaceForDBTransaction( db_dir, db_size )
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def GetApproxVacuumDuration( db_size ):
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vacuum_estimate = int( db_size * 1.2 )
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approx_vacuum_speed_mb_per_s = 1048576 * 1
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approx_vacuum_duration = vacuum_estimate // approx_vacuum_speed_mb_per_s
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return approx_vacuum_duration
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def ReadLargeIdQueryInSeparateChunks( cursor, select_statement, chunk_size ):
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table_name = 'tempbigread' + os.urandom( 32 ).hex()
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cursor.execute( 'CREATE TEMPORARY TABLE ' + table_name + ' ( job_id INTEGER PRIMARY KEY AUTOINCREMENT, temp_id INTEGER );' )
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cursor.execute( 'INSERT INTO ' + table_name + ' ( temp_id ) ' + select_statement ) # given statement should end in semicolon, so we are good
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num_to_do = cursor.rowcount
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if num_to_do is None or num_to_do == -1:
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num_to_do = 0
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i = 0
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num_done = 0
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while num_done < num_to_do:
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chunk = [ temp_id for ( temp_id, ) in cursor.execute( 'SELECT temp_id FROM ' + table_name + ' WHERE job_id BETWEEN ? AND ?;', ( i, i + ( chunk_size - 1 ) ) ) ]
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i += chunk_size
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num_done += len( chunk )
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yield ( chunk, num_done, num_to_do )
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cursor.execute( 'DROP TABLE ' + table_name + ';' )
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def VacuumDB( db_path ):
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db = sqlite3.connect( db_path, isolation_level = None, detect_types = sqlite3.PARSE_DECLTYPES )
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c = db.cursor()
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fast_big_transaction_wal = not sqlite3.sqlite_version_info < ( 3, 11, 0 )
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if HG.db_journal_mode == 'WAL' and not fast_big_transaction_wal:
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c.execute( 'PRAGMA journal_mode = TRUNCATE;' )
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# this used to be 1024 for Linux users, so we do want to check and coerce back to SQLite default, 4096
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( page_size, ) = c.execute( 'PRAGMA page_size;' ).fetchone()
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ideal_page_size = 4096
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if page_size != ideal_page_size:
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c.execute( 'PRAGMA journal_mode = TRUNCATE;' )
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c.execute( 'PRAGMA page_size = ' + str( ideal_page_size ) + ';' )
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c.execute( 'PRAGMA auto_vacuum = 0;' ) # none
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c.execute( 'VACUUM;' )
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c.execute( 'PRAGMA journal_mode = {};'.format( HG.db_journal_mode ) )
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class HydrusDB( HydrusDBBase.DBBase ):
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READ_WRITE_ACTIONS = []
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UPDATE_WAIT = 2
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def __init__( self, controller: HydrusControllerInterface.HydrusControllerInterface, db_dir, db_name ):
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HydrusDBBase.DBBase.__init__( self )
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self._controller = controller
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self._db_dir = db_dir
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self._db_name = db_name
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self._modules = []
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HydrusDBBase.TemporaryIntegerTableNameCache()
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self._ssl_cert_filename = '{}.crt'.format( self._db_name )
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self._ssl_key_filename = '{}.key'.format( self._db_name )
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self._ssl_cert_path = os.path.join( self._db_dir, self._ssl_cert_filename )
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self._ssl_key_path = os.path.join( self._db_dir, self._ssl_key_filename )
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main_db_filename = db_name
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if not main_db_filename.endswith( '.db' ):
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main_db_filename += '.db'
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self._db_filenames = {}
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self._db_filenames[ 'main' ] = main_db_filename
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self._durable_temp_db_filename = db_name + '.temp.db'
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durable_temp_db_path = os.path.join( self._db_dir, self._durable_temp_db_filename )
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if os.path.exists( durable_temp_db_path ):
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HydrusPaths.DeletePath( durable_temp_db_path )
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wal_lad = durable_temp_db_path + '-wal'
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if os.path.exists( wal_lad ):
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HydrusPaths.DeletePath( wal_lad )
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shm_lad = durable_temp_db_path + '-shm'
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if os.path.exists( shm_lad ):
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HydrusPaths.DeletePath( shm_lad )
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HydrusData.Print( 'Found and deleted the durable temporary database on boot. The last exit was probably not clean.' )
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self._InitExternalDatabases()
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self._is_first_start = False
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self._is_db_updated = False
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self._local_shutdown = False
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self._pause_and_disconnect = False
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self._loop_finished = False
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self._ready_to_serve_requests = False
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self._could_not_initialise = False
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self._jobs = queue.Queue()
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self._currently_doing_job = False
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self._current_status = ''
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self._current_job_name = ''
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self._db = None
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self._is_connected = False
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self._cursor_transaction_wrapper = None
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if os.path.exists( os.path.join( self._db_dir, self._db_filenames[ 'main' ] ) ):
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# open and close to clean up in case last session didn't close well
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self._InitDB()
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self._CloseDBConnection()
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total_db_size = self.GetApproxTotalFileSize()
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size_check = min( int( total_db_size * 0.5 ), 500 * 1048576 )
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size_check = max( size_check, 64 * 1048576 )
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if HydrusPaths.GetFreeSpace( db_dir ) < size_check:
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raise HydrusExceptions.DBAccessException( 'Sorry, it looks like the database drive partition has less than {} free space. It needs this for database transactions, so please free up some space.'.format( HydrusData.ToHumanBytes( size_check ) ) )
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self._InitDB()
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( version, ) = self._Execute( 'SELECT version FROM version;' ).fetchone()
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if version > HC.SOFTWARE_VERSION:
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self._ReportOverupdatedDB( version )
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if version < HC.SOFTWARE_VERSION - 50:
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raise HydrusExceptions.DBVersionException( 'Your current database version of hydrus ' + str( version ) + ' is too old for this software version ' + str( HC.SOFTWARE_VERSION ) + ' to update. Please try updating with version ' + str( version + 45 ) + ' or earlier first.' )
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bitrot_rows = [
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( 'client', 551, 558, 'millisecond timestamp conversion' )
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]
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for ( bitrot_db_name, latest_affected_version, safe_update_version, reason ) in bitrot_rows:
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if self._db_name == bitrot_db_name and version <= latest_affected_version:
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raise HydrusExceptions.DBVersionException( f'Sorry, due to a bitrot issue ({reason}), you cannot update to this software version (v{HC.SOFTWARE_VERSION}) if your database is on v{latest_affected_version} or earlier (you are on v{version}). Please download and update to v{safe_update_version} first!' )
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if version < ( HC.SOFTWARE_VERSION - 15 ):
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self._ReportUnderupdatedDB( version )
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self._RepairDB( version )
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while version < HC.SOFTWARE_VERSION:
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time.sleep( self.UPDATE_WAIT )
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try:
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self._cursor_transaction_wrapper.BeginImmediate()
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except Exception as e:
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raise HydrusExceptions.DBAccessException( str( e ) )
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try:
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self._UpdateDB( version )
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self._cursor_transaction_wrapper.Commit()
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self._is_db_updated = True
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except:
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e = Exception( 'Updating the ' + self._db_name + ' db to version ' + str( version + 1 ) + ' caused this error:' + '\n' + traceback.format_exc() )
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try:
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self._cursor_transaction_wrapper.Rollback()
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except Exception as rollback_e:
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HydrusData.Print( 'When the update failed, attempting to rollback the database failed.' )
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HydrusData.PrintException( rollback_e )
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raise e
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( version, ) = self._Execute( 'SELECT version FROM version;' ).fetchone()
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self._CloseDBConnection()
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self._controller.CallToThreadLongRunning( self.MainLoop )
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while not self._ready_to_serve_requests:
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time.sleep( 0.1 )
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if self._could_not_initialise:
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raise Exception( 'Could not initialise the db! Error written to the log!' )
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def _AttachExternalDatabases( self ):
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for ( name, filename ) in self._db_filenames.items():
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if name == 'main':
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continue
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db_path = os.path.join( self._db_dir, filename )
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if os.path.exists( db_path ) and not HydrusPaths.FileisWriteable( db_path ):
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raise HydrusExceptions.DBAccessException( '"{}" seems to be read-only!'.format( db_path ) )
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self._Execute( 'ATTACH ? AS ' + name + ';', ( db_path, ) )
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db_path = os.path.join( self._db_dir, self._durable_temp_db_filename )
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self._Execute( 'ATTACH ? AS durable_temp;', ( db_path, ) )
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def _CleanAfterJobWork( self ):
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self._cursor_transaction_wrapper.CleanPubSubs()
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def _CloseDBConnection( self ):
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HydrusDBBase.TemporaryIntegerTableNameCache.instance().Clear()
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if self._db is not None:
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if self._cursor_transaction_wrapper.InTransaction():
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self._cursor_transaction_wrapper.Commit()
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self._CloseCursor()
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self._db.close()
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del self._db
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self._db = None
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self._is_connected = False
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self._cursor_transaction_wrapper = None
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self._UnloadModules()
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def _CreateDB( self ):
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raise NotImplementedError()
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def _DisplayCatastrophicError( self, text ):
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message = 'The db encountered a serious error! This is going to be written to the log as well, but here it is for a screenshot:'
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message += '\n' * 2
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message += text
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HydrusData.DebugPrint( message )
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def _DoAfterJobWork( self ):
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self._cursor_transaction_wrapper.DoPubSubs()
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def _GenerateDBJob( self, job_type, synchronous, action, *args, **kwargs ):
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return HydrusData.JobDatabase( job_type, synchronous, action, *args, **kwargs )
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def _GetPossibleAdditionalDBFilenames( self ):
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return [ self._ssl_cert_filename, self._ssl_key_filename ]
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def _InitCaches( self ):
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pass
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def _InitDB( self ):
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main_database_is_missing = False
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main_db_path = os.path.join( self._db_dir, self._db_filenames[ 'main' ] )
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external_db_paths = [ os.path.join( self._db_dir, self._db_filenames[ db_name ] ) for db_name in self._db_filenames if db_name != 'main' ]
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existing_external_db_paths = [ external_db_path for external_db_path in external_db_paths if os.path.exists( external_db_path ) ]
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if os.path.exists( main_db_path ):
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if len( existing_external_db_paths ) < len( external_db_paths ):
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external_paths_summary = '"{}"'.format( '", "'.join( [ path for path in external_db_paths if path not in existing_external_db_paths ] ) )
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message = f'While the main database file, "{main_db_path}", exists, the external files {external_paths_summary} do not!\n\nIf this is a surprise to you, you have probably had a hard drive failure. You must close this process immediately and diagnose what has happened. Check the "help my db is broke.txt" document in the install_dir/db directory for additional help.\n\nIf this is not a surprise, then you may continue if you wish, and hydrus will do its best to reconstruct the missing files. You will see more error prompts.'
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self._controller.BlockingSafeShowCriticalMessage( 'missing database file!', message )
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else:
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main_database_is_missing = True
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if len( existing_external_db_paths ) > 0:
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external_paths_summary = '"{}"'.format( '", "'.join( existing_external_db_paths ) )
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message = f'Although the external files, {external_paths_summary} do exist, the main database file, "{main_db_path}", does not!\n\nThis makes for an invalid database, and the program will now quit. Please contact hydrus_dev if you do not know how this happened or need help recovering from hard drive failure.'
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raise HydrusExceptions.DBAccessException( message )
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self._InitDBConnection()
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version_is_missing = False
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result = self._Execute( 'SELECT 1 FROM sqlite_master WHERE type = ? AND name = ?;', ( 'table', 'version' ) ).fetchone()
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if result is None:
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if not main_database_is_missing:
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message = f'The "version" table in your {main_db_path} database was missing.\n\nIf you have used this database many times before, then you have probably had a hard drive failure. You must close this process immediately and diagnose what has happened. Check the "help my db is broke.txt" document in the install_dir/db directory for additional help.\n\nIf this database is new, and you recently attempted to boot it for the first time, but it failed, then this is less of a worrying situation, and you can continue.'
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self._controller.BlockingSafeShowCriticalMessage( 'missing critical database table!', message )
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version_is_missing = True
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if main_database_is_missing or version_is_missing:
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self._is_first_start = True
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self._CreateDB()
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self._cursor_transaction_wrapper.CommitAndBegin()
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def _InitDBConnection( self ):
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self._CloseDBConnection()
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db_path = os.path.join( self._db_dir, self._db_filenames[ 'main' ] )
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try:
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if os.path.exists( db_path ) and not HydrusPaths.FileisWriteable( db_path ):
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raise HydrusExceptions.DBAccessException( '"{}" seems to be read-only!'.format( db_path ) )
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self._db = sqlite3.connect( db_path, isolation_level = None, detect_types = sqlite3.PARSE_DECLTYPES )
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c = self._db.cursor()
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self._SetCursor( c )
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self._is_connected = True
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self._cursor_transaction_wrapper = HydrusDBBase.DBCursorTransactionWrapper( self._c, HG.db_transaction_commit_period )
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if HG.no_db_temp_files:
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self._Execute( 'PRAGMA temp_store = 2;' ) # use memory for temp store exclusively
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self._AttachExternalDatabases()
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self._LoadModules()
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self._Execute( 'ATTACH ":memory:" AS mem;' )
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except HydrusExceptions.DBAccessException as e:
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raise
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except Exception as e:
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raise HydrusExceptions.DBAccessException( 'Could not connect to database! If the answer is not obvious to you, please let hydrus dev know. Error follows:' + '\n' * 2 + str( e ) )
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HydrusDBBase.TemporaryIntegerTableNameCache.instance().Clear()
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# durable_temp is not excluded here
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db_names = [ name for ( index, name, path ) in self._Execute( 'PRAGMA database_list;' ) if name not in ( 'mem', 'temp' ) ]
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for db_name in db_names:
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# MB -> KB
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cache_size = HG.db_cache_size * 1024
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self._Execute( 'PRAGMA {}.cache_size = -{};'.format( db_name, cache_size ) )
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self._Execute( 'PRAGMA {}.journal_mode = {};'.format( db_name, HG.db_journal_mode ) )
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if HG.db_journal_mode in ( 'PERSIST', 'WAL' ):
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# We tried 1GB here, but I have reports of larger ones that don't seem to truncate ever?
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# Not sure what that is about, but I guess the db sometimes doesn't want to (expensively?) recover pages from the journal and just appends more data
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# In any case, this pragma is not a 'don't allow it to grow larger than', it's a 'after commit, truncate back to this', so no need to make it so large
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# default is -1, which means no limit
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self._Execute( 'PRAGMA {}.journal_size_limit = {};'.format( db_name, HydrusDBBase.JOURNAL_SIZE_LIMIT ) )
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|
|
|
|
self._Execute( 'PRAGMA {}.synchronous = {};'.format( db_name, HG.db_synchronous ) )
|
|
|
|
try:
|
|
|
|
self._Execute( 'SELECT * FROM {}.sqlite_master;'.format( db_name ) ).fetchone()
|
|
|
|
except sqlite3.OperationalError as e:
|
|
|
|
message = 'The database seemed valid, but hydrus failed to read basic data from it. You may need to run the program in a different journal mode using --db_journal_mode. Full error information:'
|
|
|
|
message += '\n' * 2
|
|
message += str( e )
|
|
|
|
HydrusData.DebugPrint( message )
|
|
|
|
raise HydrusExceptions.DBAccessException( message )
|
|
|
|
|
|
|
|
try:
|
|
|
|
self._cursor_transaction_wrapper.BeginImmediate()
|
|
|
|
except Exception as e:
|
|
|
|
if 'locked' in str( e ):
|
|
|
|
raise HydrusExceptions.DBAccessException( 'Database appeared to be locked. Please ensure there is not another client already running on this database, and then try restarting the client.' )
|
|
|
|
|
|
raise HydrusExceptions.DBAccessException( str( e ) )
|
|
|
|
|
|
|
|
def _InitExternalDatabases( self ):
|
|
|
|
pass
|
|
|
|
|
|
def _LoadModules( self ):
|
|
|
|
pass
|
|
|
|
|
|
def _ManageDBError( self, job, e ):
|
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _ProcessJob( self, job ):
|
|
|
|
job_type = job.GetType()
|
|
|
|
( action, args, kwargs ) = job.GetCallableTuple()
|
|
|
|
try:
|
|
|
|
if job_type in ( 'read_write', 'write' ):
|
|
|
|
self._current_status = 'db write locked'
|
|
|
|
self._cursor_transaction_wrapper.NotifyWriteOccuring()
|
|
|
|
else:
|
|
|
|
self._current_status = 'db read locked'
|
|
|
|
|
|
self.publish_status_update()
|
|
|
|
if job_type in ( 'read', 'read_write' ):
|
|
|
|
result = self._Read( action, *args, **kwargs )
|
|
|
|
elif job_type in ( 'write' ):
|
|
|
|
result = self._Write( action, *args, **kwargs )
|
|
|
|
|
|
if job.IsSynchronous():
|
|
|
|
job.PutResult( result )
|
|
|
|
|
|
self._cursor_transaction_wrapper.Save()
|
|
|
|
if self._cursor_transaction_wrapper.TimeToCommit():
|
|
|
|
self._current_status = 'db committing'
|
|
|
|
self.publish_status_update()
|
|
|
|
self._cursor_transaction_wrapper.CommitAndBegin()
|
|
|
|
|
|
self._DoAfterJobWork()
|
|
|
|
except Exception as e:
|
|
|
|
self._ManageDBError( job, e )
|
|
|
|
try:
|
|
|
|
self._cursor_transaction_wrapper.Rollback()
|
|
|
|
except Exception as rollback_e:
|
|
|
|
HydrusData.Print( 'When the transaction failed, attempting to rollback the database failed. Please restart the client as soon as is convenient.' )
|
|
|
|
self._CloseDBConnection()
|
|
|
|
self._InitDBConnection()
|
|
|
|
HydrusData.PrintException( rollback_e )
|
|
|
|
|
|
finally:
|
|
|
|
self._CleanAfterJobWork()
|
|
|
|
self._current_status = ''
|
|
|
|
self.publish_status_update()
|
|
|
|
|
|
|
|
def _Read( self, action, *args, **kwargs ):
|
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _RepairDB( self, version ):
|
|
|
|
for module in self._modules:
|
|
|
|
module.Repair( version, self._cursor_transaction_wrapper )
|
|
|
|
|
|
if HG.controller.LastShutdownWasBad():
|
|
|
|
for module in self._modules:
|
|
|
|
module.DoLastShutdownWasBadWork()
|
|
|
|
|
|
|
|
|
|
def _ReportOverupdatedDB( self, version ):
|
|
|
|
pass
|
|
|
|
|
|
def _ReportUnderupdatedDB( self, version ):
|
|
|
|
pass
|
|
|
|
|
|
def _ShrinkMemory( self ):
|
|
|
|
self._Execute( 'PRAGMA shrink_memory;' )
|
|
|
|
|
|
def _UnloadModules( self ):
|
|
|
|
self._modules = []
|
|
|
|
|
|
def _UpdateDB( self, version ):
|
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _Write( self, action, *args, **kwargs ):
|
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def publish_status_update( self ):
|
|
|
|
pass
|
|
|
|
|
|
def CurrentlyDoingJob( self ):
|
|
|
|
return self._currently_doing_job
|
|
|
|
|
|
def GetApproxTotalFileSize( self ):
|
|
|
|
total = 0
|
|
|
|
for filename in self._db_filenames.values():
|
|
|
|
path = os.path.join( self._db_dir, filename )
|
|
|
|
if os.path.exists( path ):
|
|
|
|
total += os.path.getsize( path )
|
|
|
|
|
|
|
|
return total
|
|
|
|
|
|
def GetSSLPaths( self ):
|
|
|
|
# create ssl keys
|
|
|
|
cert_here = os.path.exists( self._ssl_cert_path )
|
|
key_here = os.path.exists( self._ssl_key_path )
|
|
|
|
if cert_here ^ key_here:
|
|
|
|
raise Exception( 'While creating the server database, only one of the paths "{}" and "{}" existed. You can create a db with these files already in place, but please either delete the existing file (to have hydrus generate its own pair) or find the other in the pair (to use your own).'.format( self._ssl_cert_path, self._ssl_key_path ) )
|
|
|
|
elif not ( cert_here or key_here ):
|
|
|
|
HydrusData.Print( 'Generating new cert/key files.' )
|
|
|
|
if not HydrusEncryption.CRYPTO_OK:
|
|
|
|
raise Exception( 'The database was asked for ssl cert and keys to start either the server or the client api in https. The files do not exist yet, so the database wanted to create new ones, but unfortunately "cryptography" library is not available, so this cannot be done. If you are running from source, please install this module using pip. Or drop in your own client.crt/client.key or server.crt/server.key files in the db directory.' )
|
|
|
|
|
|
HydrusEncryption.GenerateOpenSSLCertAndKeyFile( self._ssl_cert_path, self._ssl_key_path )
|
|
|
|
|
|
return ( self._ssl_cert_path, self._ssl_key_path )
|
|
|
|
|
|
def GetStatus( self ):
|
|
|
|
return ( self._current_status, self._current_job_name )
|
|
|
|
|
|
def IsConnected( self ):
|
|
|
|
return self._is_connected
|
|
|
|
|
|
def IsDBUpdated( self ):
|
|
|
|
return self._is_db_updated
|
|
|
|
|
|
def IsFirstStart( self ):
|
|
|
|
return self._is_first_start
|
|
|
|
|
|
def LoopIsFinished( self ):
|
|
|
|
return self._loop_finished
|
|
|
|
|
|
def JobsQueueEmpty( self ):
|
|
|
|
return self._jobs.empty()
|
|
|
|
|
|
def MainLoop( self ):
|
|
|
|
try:
|
|
|
|
self._InitDBConnection() # have to reinitialise because the thread id has changed
|
|
|
|
self._InitCaches()
|
|
|
|
except:
|
|
|
|
self._DisplayCatastrophicError( traceback.format_exc() )
|
|
|
|
self._could_not_initialise = True
|
|
|
|
return
|
|
|
|
|
|
self._ready_to_serve_requests = True
|
|
|
|
error_count = 0
|
|
|
|
while not ( ( self._local_shutdown or HG.model_shutdown ) and self._jobs.empty() ):
|
|
|
|
try:
|
|
|
|
job = self._jobs.get( timeout = 1 )
|
|
|
|
self._currently_doing_job = True
|
|
self._current_job_name = job.ToString()
|
|
|
|
self.publish_status_update()
|
|
|
|
try:
|
|
|
|
if HG.db_report_mode:
|
|
|
|
summary = 'Running db job: ' + job.ToString()
|
|
|
|
HydrusData.ShowText( summary )
|
|
|
|
|
|
if HG.profile_mode:
|
|
|
|
summary = 'Profiling db job: ' + job.ToString()
|
|
|
|
HydrusProfiling.Profile( summary, 'self._ProcessJob( job )', globals(), locals(), min_duration_ms = HG.db_profile_min_job_time_ms )
|
|
|
|
else:
|
|
|
|
self._ProcessJob( job )
|
|
|
|
|
|
error_count = 0
|
|
|
|
except:
|
|
|
|
error_count += 1
|
|
|
|
if error_count > 5:
|
|
|
|
raise
|
|
|
|
|
|
self._jobs.put( job ) # couldn't lock db; put job back on queue
|
|
|
|
time.sleep( 5 )
|
|
|
|
|
|
self._currently_doing_job = False
|
|
self._current_job_name = ''
|
|
|
|
self.publish_status_update()
|
|
|
|
except queue.Empty:
|
|
|
|
if self._cursor_transaction_wrapper.TimeToCommit():
|
|
|
|
self._cursor_transaction_wrapper.CommitAndBegin()
|
|
|
|
|
|
|
|
if self._pause_and_disconnect:
|
|
|
|
self._CloseDBConnection()
|
|
|
|
while self._pause_and_disconnect:
|
|
|
|
if self._local_shutdown or HG.model_shutdown:
|
|
|
|
break
|
|
|
|
|
|
time.sleep( 1 )
|
|
|
|
|
|
self._InitDBConnection()
|
|
|
|
|
|
|
|
self._CloseDBConnection()
|
|
|
|
temp_path = os.path.join( self._db_dir, self._durable_temp_db_filename )
|
|
|
|
HydrusPaths.DeletePath( temp_path )
|
|
|
|
self._loop_finished = True
|
|
|
|
|
|
def PauseAndDisconnect( self, pause_and_disconnect ):
|
|
|
|
self._pause_and_disconnect = pause_and_disconnect
|
|
|
|
|
|
def Read( self, action, *args, **kwargs ):
|
|
|
|
if action in self.READ_WRITE_ACTIONS:
|
|
|
|
job_type = 'read_write'
|
|
|
|
else:
|
|
|
|
job_type = 'read'
|
|
|
|
|
|
synchronous = True
|
|
|
|
job = self._GenerateDBJob( job_type, synchronous, action, *args, **kwargs )
|
|
|
|
if HG.model_shutdown:
|
|
|
|
raise HydrusExceptions.ShutdownException( 'Application has shut down!' )
|
|
|
|
|
|
self._jobs.put( job )
|
|
|
|
return job.GetResult()
|
|
|
|
|
|
def ReadyToServeRequests( self ):
|
|
|
|
return self._ready_to_serve_requests
|
|
|
|
|
|
def Shutdown( self ):
|
|
|
|
self._local_shutdown = True
|
|
|
|
|
|
def Write( self, action, synchronous, *args, **kwargs ):
|
|
|
|
job_type = 'write'
|
|
|
|
job = self._GenerateDBJob( job_type, synchronous, action, *args, **kwargs )
|
|
|
|
if HG.model_shutdown:
|
|
|
|
raise HydrusExceptions.ShutdownException( 'Application has shut down!' )
|
|
|
|
|
|
self._jobs.put( job )
|
|
|
|
if synchronous: return job.GetResult()
|
|
|
|
|