Merge "Do not use LazyPluggable"
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commit
76eda512ba
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@ -19,27 +19,44 @@
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"""Metadata setup commands."""
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from glance.common import utils
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import threading
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from oslo.config import cfg
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from oslo import db
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from stevedore import driver
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from glance.db.sqlalchemy import api as db_api
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IMPL = utils.LazyPluggable(
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'backend',
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config_group='database',
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sqlalchemy='glance.db.sqlalchemy.metadata')
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_IMPL = None
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_LOCK = threading.Lock()
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db.options.set_defaults(cfg.CONF)
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def get_backend():
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global _IMPL
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if _IMPL is None:
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with _LOCK:
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if _IMPL is None:
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_IMPL = driver.DriverManager(
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"glance.database.metadata_backend",
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cfg.CONF.database.backend).driver
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return _IMPL
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def load_metadefs():
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"""Read metadefinition files and insert data into the database"""
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return IMPL.db_load_metadefs(engine=db_api.get_engine(),
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metadata_path=None)
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return get_backend().db_load_metadefs(engine=db_api.get_engine(),
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metadata_path=None)
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def unload_metadefs():
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"""Unload metadefinitions from database"""
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return IMPL.db_unload_metadefs(engine=db_api.get_engine())
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return get_backend().db_unload_metadefs(engine=db_api.get_engine())
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def export_metadefs():
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"""Export metadefinitions from database to files"""
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return IMPL.db_export_metadefs(engine=db_api.get_engine(),
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metadata_path=None)
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return get_backend().db_export_metadefs(engine=db_api.get_engine(),
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metadata_path=None)
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