90 lines
3.2 KiB
Python
90 lines
3.2 KiB
Python
import os
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import logging
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from twisted.internet import defer, threads
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from lbrynet import conf
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from lbrynet.database.storage import SQLiteStorage
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from lbrynet.daemon.Component import Component
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log = logging.getLogger(__name__)
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# settings must be initialized before this file is imported
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DATABASE_COMPONENT = "database"
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class DatabaseComponent(Component):
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component_name = DATABASE_COMPONENT
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storage = None
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@staticmethod
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def get_db_dir():
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return conf.settings['data_dir']
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@staticmethod
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def get_download_directory():
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return conf.settings['download_directory']
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@staticmethod
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def get_blobfile_dir():
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return conf.settings['BLOBFILES_DIR']
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@staticmethod
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def get_current_db_revision():
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return 7
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@staticmethod
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def get_revision_filename():
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return conf.settings.get_db_revision_filename()
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@staticmethod
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def _write_db_revision_file(version_num):
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with open(conf.settings.get_db_revision_filename(), mode='w') as db_revision:
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db_revision.write(str(version_num))
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@classmethod
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@defer.inlineCallbacks
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def setup(cls):
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# check directories exist, create them if they don't
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log.info("Loading databases")
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if not os.path.exists(cls.get_download_directory()):
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os.mkdir(cls.get_download_directory())
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if not os.path.exists(cls.get_db_dir()):
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os.mkdir(cls.get_db_dir())
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cls._write_db_revision_file(cls.get_current_db_revision())
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log.debug("Created the db revision file: %s", cls.get_revision_filename())
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if not os.path.exists(cls.get_blobfile_dir()):
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os.mkdir(cls.get_blobfile_dir())
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log.debug("Created the blobfile directory: %s", str(cls.get_blobfile_dir()))
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if not os.path.exists(cls.get_revision_filename()):
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log.warning("db_revision file not found. Creating it")
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cls._write_db_revision_file(cls.get_current_db_revision())
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# check the db migration and run any needed migrations
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migrated = False
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with open(cls.get_revision_filename(), "r") as revision_read_handle:
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old_revision = int(revision_read_handle.read().strip())
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if old_revision > cls.get_current_db_revision():
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raise Exception('This version of lbrynet is not compatible with the database\n'
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'Your database is revision %i, expected %i' %
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(old_revision, cls.get_current_db_revision()))
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if old_revision < cls.get_current_db_revision():
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from lbrynet.database.migrator import dbmigrator
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log.info("Upgrading your databases (revision %i to %i)", old_revision, cls.get_current_db_revision())
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yield threads.deferToThread(
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dbmigrator.migrate_db, cls.get_db_dir(), old_revision, cls.get_current_db_revision()
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)
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cls._write_db_revision_file(cls.get_current_db_revision())
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log.info("Finished upgrading the databases.")
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migrated = True
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# start SQLiteStorage
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cls.storage = SQLiteStorage(cls.get_db_dir())
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yield cls.storage.setup()
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defer.returnValue(migrated)
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@classmethod
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@defer.inlineCallbacks
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def stop(cls):
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yield cls.storage.stop()
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