server/serverconfig.py
author sylvain.thenault@logilab.fr
Fri, 30 Jan 2009 12:30:04 +0100
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"""server.serverconfig definition
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:organization: Logilab
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:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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"""
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__docformat__ = "restructuredtext en"
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import os
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from os.path import join, exists
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from logilab.common.configuration import Method
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from logilab.common.decorators import wproperty, cached, clear_cache
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from cubicweb import CW_SOFTWARE_ROOT, RegistryNotFound
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from cubicweb.toolsutils import env_path, read_config
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from cubicweb.cwconfig import CubicWebConfiguration, merge_options
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class ServerConfiguration(CubicWebConfiguration):
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    """standalone RQL server"""
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    name = 'repository'
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    if os.environ.get('APYCOT_ROOT'):
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        root = os.environ['APYCOT_ROOT']
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        SCHEMAS_LIB_DIR = '%s/local/share/cubicweb/schemas/' % root
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    elif CubicWebConfiguration.mode == 'dev':
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        SCHEMAS_LIB_DIR = join(CW_SOFTWARE_ROOT, 'schemas')
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        BACKUP_DIR = CubicWebConfiguration.RUNTIME_DIR
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    else:
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        SCHEMAS_LIB_DIR = '/usr/share/cubicweb/schemas/'
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        BACKUP_DIR = '/var/lib/cubicweb/backup/'
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    cubicweb_vobject_path = CubicWebConfiguration.cubicweb_vobject_path | set(['sobjects'])
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    cube_vobject_path = CubicWebConfiguration.cube_vobject_path | set(['sobjects', 'hooks'])
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    options = merge_options((
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        # ctl configuration
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        ('host',
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         {'type' : 'string',
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          'default': None,
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          'help': 'host name if not correctly detectable through gethostname',
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          'group': 'main', 'inputlevel': 1,
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          }),
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        ('pid-file',
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         {'type' : 'string',
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          'default': Method('default_pid_file'),
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          'help': 'repository\'s pid file',
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          'group': 'main', 'inputlevel': 2,
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          }),
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        ('uid',
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         {'type' : 'string',
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          'default': None,
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          'help': 'if this option is set, use the specified user to start \
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the repository rather than the user running the command',
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          'group': 'main', 'inputlevel': (CubicWebConfiguration.mode == 'installed') and 0 or 1,
0
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          }),
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        ('session-time',
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         {'type' : 'int',
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          'default': 30*60,
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          'help': 'session expiration time, default to 30 minutes',
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          'group': 'main', 'inputlevel': 1,
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          }),
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        ('connections-pool-size',
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         {'type' : 'int',
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          'default': 4,
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          'help': 'size of the connections pools. Each source supporting multiple \
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connections will have this number of opened connections.',
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          'group': 'main', 'inputlevel': 1,
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          }),
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        ('rql-cache-size',
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         {'type' : 'int',
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          'default': 300,
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          'help': 'size of the parsed rql cache size.',
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          'group': 'main', 'inputlevel': 1,
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          }),
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        # email configuration
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        ('default-recipients-mode',
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         {'type' : 'choice',
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          'choices' : ('default-dest-addrs', 'users', 'none'),
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          'default': 'default-dest-addrs',
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          'help': 'when a notification should be sent with no specific rules \
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to find recipients, recipients will be found according to this mode. Available \
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modes are "default-dest-addrs" (emails specified in the configuration \
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variable with the same name), "users" (every users which has activated \
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account with an email set), "none" (no notification).',
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          'group': 'email', 'inputlevel': 1,
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          }),
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        ('default-dest-addrs',
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         {'type' : 'csv',
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          'default': (),
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          'help': 'comma separated list of email addresses that will be used \
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as default recipient when an email is sent and the notification has no \
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specific recipient rules.',
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          'group': 'email', 'inputlevel': 1,
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          }),
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        ('supervising-addrs',
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         {'type' : 'csv',
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          'default': (),
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          'help': 'comma separated list of email addresses that will be \
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notified of every changes.',
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          'group': 'email', 'inputlevel': 2,
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          }),
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        # pyro server.serverconfig
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        ('pyro-port',
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         {'type' : 'int',
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          'default': None,
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          'help': 'Pyro server port. If not set, it will be choosen randomly',
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          'group': 'pyro-server', 'inputlevel': 2,
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          }),
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        ('pyro-id', # XXX reuse pyro-application-id
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         {'type' : 'string',
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          'default': None,
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          'help': 'identifier of the repository in the pyro name server',
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          'group': 'pyro-server', 'inputlevel': 2,
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          }),
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        ) + CubicWebConfiguration.options)
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    # read the schema from the database
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    read_application_schema = True
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    bootstrap_schema = True
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    # check user's state at login time
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    consider_user_state = True
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    # hooks registration configuration
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    # all hooks should be activated during normal execution
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    core_hooks = True
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    usergroup_hooks = True
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    schema_hooks = True
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    notification_hooks = True
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    security_hooks = True
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    application_hooks = True
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   133
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    # should some hooks be deactivated during [pre|post]create script execution
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    free_wheel = False
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   136
    
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    # list of enables sources when sources restriction is necessary
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    # (eg repository initialization at least)
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    _enabled_sources = None
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    @wproperty
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    def enabled_sources(self, sourceuris=None):
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        self._enabled_sources = sourceuris
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        clear_cache(self, 'sources')
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    @classmethod
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    def schemas_lib_dir(cls):
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        """application schema directory"""
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        return env_path('CW_SCHEMA_LIB', cls.SCHEMAS_LIB_DIR, 'schemas')
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    @classmethod
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    def backup_dir(cls):
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        """backup directory where a stored db backups before migration"""
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        return env_path('CW_BACKUP', cls.BACKUP_DIR, 'run time')
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    def bootstrap_cubes(self):
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        from logilab.common.textutils import get_csv
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        for line in file(join(self.apphome, 'bootstrap_cubes')):
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            line = line.strip()
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   159
            if not line or line.startswith('#'):
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                continue
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            self.init_cubes(self.expand_cubes(get_csv(line)))
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            break
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   163
        else:
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            # no cubes
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            self.init_cubes(())
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   166
        
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    def write_bootstrap_cubes_file(self, cubes):
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        stream = file(join(self.apphome, 'bootstrap_cubes'), 'w')
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        stream.write('# this is a generated file only used for bootstraping\n')
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        stream.write('# you should not have to edit this\n')
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        stream.write('%s\n' % ','.join(cubes))
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        stream.close()
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   173
        
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   174
    def sources_file(self):
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   175
        return join(self.apphome, 'sources')
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   176
    
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    # this method has to be cached since when the server is running using a
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   178
    # restricted user, this user usually don't have access to the sources
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   179
    # configuration file (#16102)
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    @cached
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   181
    def sources(self):
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        """return a dictionnaries containing sources definitions indexed by
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        sources'uri
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   184
        """
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        allsources = read_config(self.sources_file())
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   186
        if self._enabled_sources is None:
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   187
            return allsources
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   188
        return dict((uri, config) for uri, config in allsources.items()
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                    if uri in self._enabled_sources or uri == 'admin')
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   190
    
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   191
    def pyro_enabled(self):
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        """pyro is always enabled in standalone repository configuration"""
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   193
        return True
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   194
        
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   195
    def load_hooks(self, vreg):
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   196
        hooks = {}
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   197
        for path in reversed([self.apphome] + self.cubes_path()):
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            hooksfile = join(path, 'application_hooks.py')
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   199
            if exists(hooksfile):
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                self.warning('application_hooks.py is deprecated, use dynamic '
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   201
                             'objects to register hooks (%s)', hooksfile)
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                context = {}
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   203
                # Use execfile rather than `load_module_from_name` because 
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   204
                # the latter gets fooled by the `sys.modules` cache when 
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   205
                # loading different configurations one after the other
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   206
                # (another fix would have been to do :
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   207
                #    sys.modules.pop('applications_hooks')
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                #  or to modify load_module_from_name so that it provides
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   209
                #  a use_cache optional parameter
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   210
                execfile(hooksfile, context, context)
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   211
                for event, hooksdef in context['HOOKS'].items():
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   212
                    for ertype, hookcbs in hooksdef.items():
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   213
                        hooks.setdefault(event, {}).setdefault(ertype, []).extend(hookcbs)
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   214
        try:
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   215
            apphookdefs = vreg.registry_objects('hooks')
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   216
        except RegistryNotFound:
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   217
            return hooks
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   218
        for hookdef in apphookdefs:
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   219
            for event, ertype in hookdef.register_to():
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   220
                if ertype == 'Any':
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   221
                    ertype = ''
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   222
                cb = hookdef.make_callback(event)
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   223
                hooks.setdefault(event, {}).setdefault(ertype, []).append(cb)
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   224
        return hooks
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   225
    
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   226
    def load_schema(self, expand_cubes=False):
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   227
        from cubicweb.schema import CubicWebSchemaLoader
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   228
        if expand_cubes:
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   229
            # in case some new dependencies have been introduced, we have to
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   230
            # reinitialize cubes so the full filesystem schema is read
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   231
            origcubes = self.cubes()
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   232
            self._cubes = None
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   233
            self.init_cubes(self.expand_cubes(origcubes))
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   234
        schema = CubicWebSchemaLoader().load(self)
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   235
        if expand_cubes:
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   236
            # restaure original value
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   237
            self._cubes = origcubes
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   238
        return schema
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   239
    
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   240
    def load_bootstrap_schema(self):
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   241
        from cubicweb.schema import BootstrapSchemaLoader
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   242
        schema = BootstrapSchemaLoader().load(self)
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   243
        schema.name = 'bootstrap'
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   244
        return schema
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   245
    
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   246
    def set_sources_mode(self, sources):
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   247
        if 'migration' in sources:
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   248
            from cubicweb.server.sources import source_adapter
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   249
            assert len(sources) == 1
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   250
            enabled_sources = []
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   251
            for uri, config in self.sources().iteritems():
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   252
                if uri == 'admin':
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   253
                    continue
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   254
                if source_adapter(config).connect_for_migration:
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diff changeset
   255
                    enabled_sources.append(uri)
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diff changeset
   256
                else:
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   257
                    print 'not connecting to source', uri, 'during migration'
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diff changeset
   258
        elif 'all' in sources:
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   259
            assert len(sources) == 1
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   260
            enabled_sources= None
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   261
        else:
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   262
            known_sources = self.sources()
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   263
            for uri in sources:
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                assert uri in known_sources, uri
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            enabled_sources = sources
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        self._enabled_sources = enabled_sources
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        clear_cache(self, 'sources')
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    def migration_handler(self, schema=None, interactive=True,
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                          cnx=None, repo=None, connect=True):
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        """return a migration handler instance"""
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        from cubicweb.server.migractions import ServerMigrationHelper
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        return ServerMigrationHelper(self, schema, interactive=interactive,
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                                     cnx=cnx, repo=repo, connect=connect,
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                                     verbosity=getattr(self, 'verbosity', 0))