author | Christophe de Vienne <christophe@unlish.com> |
Tue, 09 Dec 2014 15:18:58 +0100 | |
changeset 10113 | e1e8df594d58 |
parent 9662 | f13ae1fea212 |
child 9822 | 4a118bfd6ab4 |
permissions | -rw-r--r-- |
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[repo sources] move handling of source's url into abstract source as this becomes shared by most sources
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# copyright 2003-2013 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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3 |
# |
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# This file is part of CubicWeb. |
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5 |
# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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proper licensing information (LGPL-2.1). Hope I get it right this time.
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# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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replace logilab-common by CubicWeb in disclaimer
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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"""cubicweb server sources support""" |
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__docformat__ = "restructuredtext en" |
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||
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[sources] reorganize abstract source code, drop no more used cleanup_entities_info and _cleanup_system_relations methods
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import itertools |
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from os.path import join, splitext |
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from time import time |
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from datetime import datetime, timedelta |
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from logging import getLogger |
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from logilab.common import configuration |
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from logilab.common.deprecation import deprecated |
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from yams.schema import role_name |
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from cubicweb import ValidationError, set_log_methods, server |
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[R repo, schema] use VIRTUAL_RTYPES const
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from cubicweb.schema import VIRTUAL_RTYPES |
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from cubicweb.server.sqlutils import SQL_PREFIX |
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[server] move EditedEntity class to its own module, to avoid cyclic dependency when needed from e.g. session.py
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from cubicweb.server.edition import EditedEntity |
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0 | 38 |
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def dbg_st_search(uri, union, varmap, args, cachekey=None, prefix='rql for'): |
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if server.DEBUG & server.DBG_RQL: |
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global t |
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print ' %s %s source: %s' % (prefix, uri, repr(union.as_string())) |
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t = time() |
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if varmap: |
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print ' using varmap', varmap |
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if server.DEBUG & server.DBG_MORE: |
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print ' args', repr(args) |
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print ' cache key', cachekey |
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print ' solutions', ','.join(str(s.solutions) |
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for s in union.children) |
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# return true so it can be used as assertion (and so be killed by python -O) |
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return True |
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def dbg_results(results): |
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if server.DEBUG & server.DBG_RQL: |
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if len(results) > 10: |
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print ' -->', results[:10], '...', len(results), |
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else: |
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print ' -->', results, |
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print 'time: ', time() - t |
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# return true so it can be used as assertion (and so be killed by python -O) |
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return True |
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class AbstractSource(object): |
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"""an abstract class for sources""" |
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# boolean telling if modification hooks should be called when something is |
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# modified in this source |
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should_call_hooks = True |
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# boolean telling if the repository should connect to this source during |
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# migration |
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connect_for_migration = True |
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# mappings telling which entities and relations are available in the source |
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# keys are supported entity/relation types and values are boolean indicating |
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# wether the support is read-only (False) or read-write (True) |
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support_entities = {} |
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support_relations = {} |
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# a global identifier for this source, which has to be set by the source |
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# instance |
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uri = None |
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# a reference to the system information helper |
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repo = None |
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# a reference to the instance'schema (may differs from the source'schema) |
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schema = None |
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# force deactivation (configuration error for instance) |
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disabled = False |
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|
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# boolean telling if cwuri of entities from this source is the url that |
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# should be used as entity's absolute url |
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use_cwuri_as_url = False |
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|
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# source configuration options |
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options = () |
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|
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# these are overridden by set_log_methods below |
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# only defining here to prevent pylint from complaining |
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info = warning = error = critical = exception = debug = lambda msg,*a,**kw: None |
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|
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def __init__(self, repo, source_config, eid=None): |
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self.repo = repo |
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self.set_schema(repo.schema) |
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self.support_relations['identity'] = False |
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self.eid = eid |
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self.public_config = source_config.copy() |
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self.public_config.setdefault('use-cwuri-as-url', self.use_cwuri_as_url) |
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self.remove_sensitive_information(self.public_config) |
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self.uri = source_config.pop('uri') |
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set_log_methods(self, getLogger('cubicweb.sources.'+self.uri)) |
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source_config.pop('type') |
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self.update_config(None, self.check_conf_dict(eid, source_config, |
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fail_if_unknown=False)) |
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|
0 | 116 |
def __repr__(self): |
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return '<%s %s source %s @%#x>' % (self.uri, self.__class__.__name__, |
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self.eid, id(self)) |
0 | 119 |
|
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def __lt__(self, other): |
0 | 121 |
"""simple comparison function to get predictable source order, with the |
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system source at last |
|
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""" |
|
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if self.uri == other.uri: |
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return False |
0 | 126 |
if self.uri == 'system': |
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return False |
0 | 128 |
if other.uri == 'system': |
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129 |
return True |
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130 |
return self.uri < other.uri |
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131 |
|
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132 |
def __eq__(self, other): |
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return self.uri == other.uri |
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|
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135 |
def backup(self, backupfile, confirm, format='native'): |
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136 |
"""method called to create a backup of source's data""" |
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137 |
pass |
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138 |
|
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139 |
def restore(self, backupfile, confirm, drop, format='native'): |
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140 |
"""method called to restore a backup of source's data""" |
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141 |
pass |
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142 |
|
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143 |
@classmethod |
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144 |
def check_conf_dict(cls, eid, confdict, _=unicode, fail_if_unknown=True): |
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145 |
"""check configuration of source entity. Return config dict properly |
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146 |
typed with defaults set. |
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147 |
""" |
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148 |
processed = {} |
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149 |
for optname, optdict in cls.options: |
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150 |
value = confdict.pop(optname, optdict.get('default')) |
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151 |
if value is configuration.REQUIRED: |
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152 |
if not fail_if_unknown: |
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153 |
continue |
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154 |
msg = _('specifying %s is mandatory' % optname) |
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155 |
raise ValidationError(eid, {role_name('config', 'subject'): msg}) |
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156 |
elif value is not None: |
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157 |
# type check |
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158 |
try: |
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159 |
value = configuration._validate(value, optdict, optname) |
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160 |
except Exception as ex: |
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161 |
msg = unicode(ex) # XXX internationalization |
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162 |
raise ValidationError(eid, {role_name('config', 'subject'): msg}) |
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163 |
processed[optname] = value |
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164 |
# cw < 3.10 bw compat |
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165 |
try: |
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166 |
processed['adapter'] = confdict['adapter'] |
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167 |
except KeyError: |
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168 |
pass |
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169 |
# check for unknown options |
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170 |
if confdict and tuple(confdict) != ('adapter',): |
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171 |
if fail_if_unknown: |
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172 |
msg = _('unknown options %s') % ', '.join(confdict) |
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173 |
raise ValidationError(eid, {role_name('config', 'subject'): msg}) |
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174 |
else: |
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175 |
logger = getLogger('cubicweb.sources') |
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176 |
logger.warning('unknown options %s', ', '.join(confdict)) |
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177 |
# add options to processed, they may be necessary during migration |
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178 |
processed.update(confdict) |
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179 |
return processed |
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180 |
|
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181 |
@classmethod |
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182 |
def check_config(cls, source_entity): |
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183 |
"""check configuration of source entity""" |
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184 |
return cls.check_conf_dict(source_entity.eid, source_entity.host_config, |
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185 |
_=source_entity._cw._) |
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186 |
|
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187 |
def update_config(self, source_entity, typedconfig): |
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188 |
"""update configuration from source entity. `typedconfig` is config |
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189 |
properly typed with defaults set |
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190 |
""" |
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191 |
if source_entity is not None: |
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192 |
self._entity_update(source_entity) |
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193 |
self.config = typedconfig |
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194 |
|
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195 |
def _entity_update(self, source_entity): |
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196 |
source_entity.complete() |
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197 |
if source_entity.url: |
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198 |
self.urls = [url.strip() for url in source_entity.url.splitlines() |
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199 |
if url.strip()] |
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200 |
else: |
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201 |
self.urls = [] |
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202 |
|
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203 |
# source initialization / finalization ##################################### |
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204 |
|
0 | 205 |
def set_schema(self, schema): |
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206 |
"""set the instance'schema""" |
0 | 207 |
self.schema = schema |
1792 | 208 |
|
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209 |
def init_creating(self): |
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210 |
"""method called by the repository once ready to create a new instance""" |
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211 |
pass |
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212 |
|
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[repository] #1460066: backport datafeed cube as cubicweb source
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213 |
def init(self, activated, source_entity): |
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214 |
"""method called by the repository once ready to handle request. |
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215 |
`activated` is a boolean flag telling if the source is activated or not. |
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216 |
""" |
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217 |
if activated: |
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218 |
self._entity_update(source_entity) |
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219 |
|
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[datafeed, entities] url for entities from a datafeed source should be on their origin site. Closes #1769391
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220 |
PUBLIC_KEYS = ('type', 'uri', 'use-cwuri-as-url') |
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221 |
def remove_sensitive_information(self, sourcedef): |
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222 |
"""remove sensitive information such as login / password from source |
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223 |
definition |
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224 |
""" |
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225 |
for key in list(sourcedef): |
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|
226 |
if not key in self.PUBLIC_KEYS: |
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227 |
sourcedef.pop(key) |
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228 |
|
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229 |
# connections handling ##################################################### |
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230 |
|
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231 |
def get_connection(self): |
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232 |
"""open and return a connection to the source""" |
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233 |
raise NotImplementedError(self) |
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234 |
|
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235 |
def close_source_connections(self): |
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236 |
for cnxset in self.repo.cnxsets: |
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237 |
cnxset.cu = None |
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238 |
cnxset.cnx.close() |
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|
239 |
|
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240 |
def open_source_connections(self): |
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241 |
for cnxset in self.repo.cnxsets: |
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242 |
cnxset.cnx = self.get_connection() |
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243 |
cnxset.cu = cnxset.cnx.cursor() |
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244 |
|
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245 |
# cache handling ########################################################### |
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|
246 |
|
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|
247 |
def reset_caches(self): |
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248 |
"""method called during test to reset potential source caches""" |
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249 |
pass |
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250 |
|
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|
251 |
def clear_eid_cache(self, eid, etype): |
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252 |
"""clear potential caches for the given eid""" |
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253 |
pass |
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|
254 |
|
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|
255 |
# external source api ###################################################### |
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256 |
|
0 | 257 |
def support_entity(self, etype, write=False): |
258 |
"""return true if the given entity's type is handled by this adapter |
|
259 |
if write is true, return true only if it's a RW support |
|
260 |
""" |
|
261 |
try: |
|
262 |
wsupport = self.support_entities[etype] |
|
263 |
except KeyError: |
|
264 |
return False |
|
265 |
if write: |
|
266 |
return wsupport |
|
267 |
return True |
|
1792 | 268 |
|
0 | 269 |
def support_relation(self, rtype, write=False): |
270 |
"""return true if the given relation's type is handled by this adapter |
|
271 |
if write is true, return true only if it's a RW support |
|
272 |
||
1792 | 273 |
current implementation return true if the relation is defined into |
274 |
`support_relations` or if it is a final relation of a supported entity |
|
0 | 275 |
type |
276 |
""" |
|
277 |
try: |
|
278 |
wsupport = self.support_relations[rtype] |
|
279 |
except KeyError: |
|
280 |
rschema = self.schema.rschema(rtype) |
|
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281 |
if not rschema.final or rschema.type == 'has_text': |
0 | 282 |
return False |
283 |
for etype in rschema.subjects(): |
|
284 |
try: |
|
285 |
wsupport = self.support_entities[etype] |
|
286 |
break |
|
287 |
except KeyError: |
|
288 |
continue |
|
289 |
else: |
|
290 |
return False |
|
291 |
if write: |
|
292 |
return wsupport |
|
1792 | 293 |
return True |
294 |
||
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|
295 |
def before_entity_insertion(self, cnx, lid, etype, eid, sourceparams): |
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296 |
"""called by the repository when an eid has been attributed for an |
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|
297 |
entity stored here but the entity has not been inserted in the system |
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|
298 |
table yet. |
0 | 299 |
|
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300 |
This method must return the an Entity instance representation of this |
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301 |
entity. |
0 | 302 |
""" |
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|
303 |
entity = self.repo.vreg['etypes'].etype_class(etype)(cnx) |
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|
304 |
entity.eid = eid |
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|
305 |
entity.cw_edited = EditedEntity(entity) |
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|
306 |
return entity |
1792 | 307 |
|
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|
308 |
def after_entity_insertion(self, cnx, lid, entity, sourceparams): |
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309 |
"""called by the repository after an entity stored here has been |
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|
310 |
inserted in the system table. |
0 | 311 |
""" |
312 |
pass |
|
1792 | 313 |
|
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|
314 |
def _load_mapping(self, session=None, **kwargs): |
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|
315 |
if not 'CWSourceSchemaConfig' in self.schema: |
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|
316 |
self.warning('instance is not mapping ready') |
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|
317 |
return |
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|
318 |
if session is None: |
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|
319 |
_session = self.repo.internal_session() |
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|
320 |
else: |
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|
321 |
_session = session |
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|
322 |
try: |
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|
323 |
for schemacfg in _session.execute( |
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|
324 |
'Any CFG,CFGO,S WHERE ' |
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|
325 |
'CFG options CFGO, CFG cw_schema S, ' |
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|
326 |
'CFG cw_for_source X, X eid %(x)s', {'x': self.eid}).entities(): |
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|
327 |
self.add_schema_config(schemacfg, **kwargs) |
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|
328 |
finally: |
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|
329 |
if session is None: |
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|
330 |
_session.close() |
0 | 331 |
|
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|
332 |
def add_schema_config(self, schemacfg, checkonly=False): |
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|
333 |
"""added CWSourceSchemaConfig, modify mapping accordingly""" |
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|
334 |
msg = schemacfg._cw._("this source doesn't use a mapping") |
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|
335 |
raise ValidationError(schemacfg.eid, {None: msg}) |
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|
336 |
|
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|
337 |
def del_schema_config(self, schemacfg, checkonly=False): |
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|
338 |
"""deleted CWSourceSchemaConfig, modify mapping accordingly""" |
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|
339 |
msg = schemacfg._cw._("this source doesn't use a mapping") |
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|
340 |
raise ValidationError(schemacfg.eid, {None: msg}) |
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|
341 |
|
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[sources] rewrite the way pyrorql mapping are stored in the database so it can be reused for other sources (eg datafeed+cwxml)
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|
342 |
def update_schema_config(self, schemacfg, checkonly=False): |
0cf10429ad39
[sources] rewrite the way pyrorql mapping are stored in the database so it can be reused for other sources (eg datafeed+cwxml)
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|
343 |
"""updated CWSourceSchemaConfig, modify mapping accordingly""" |
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|
344 |
self.del_schema_config(schemacfg, checkonly) |
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|
345 |
self.add_schema_config(schemacfg, checkonly) |
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|
346 |
|
6943
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changeset
|
347 |
# user authentication api ################################################## |
1792 | 348 |
|
9512
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[server] use a connection instead of a session for user authentication
Julien Cristau <julien.cristau@logilab.fr>
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diff
changeset
|
349 |
def authenticate(self, cnx, login, **kwargs): |
6152
6824f8b61098
use is_instance in a number of places (esp. documentation) rather than the deprecated implements
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
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changeset
|
350 |
"""if the source support CWUser entity type, it should implement |
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351 |
this method which should return CWUser eid for the given login/password |
0 | 352 |
if this account is defined in this source and valid login / password is |
353 |
given. Else raise `AuthenticationError` |
|
354 |
""" |
|
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355 |
raise NotImplementedError(self) |
1792 | 356 |
|
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357 |
# RQL query api ############################################################ |
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|
358 |
|
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[server] use a connection instead of a session for user authentication
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|
359 |
def syntax_tree_search(self, cnx, union, |
0 | 360 |
args=None, cachekey=None, varmap=None, debug=0): |
1792 | 361 |
"""return result from this source for a rql query (actually from a rql |
362 |
syntax tree and a solution dictionary mapping each used variable to a |
|
0 | 363 |
possible type). If cachekey is given, the query necessary to fetch the |
364 |
results (but not the results themselves) may be cached using this key. |
|
365 |
""" |
|
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366 |
raise NotImplementedError(self) |
1792 | 367 |
|
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|
368 |
# write modification api ################################################### |
0 | 369 |
# read-only sources don't have to implement methods below |
370 |
||
371 |
def get_extid(self, entity): |
|
372 |
"""return the external id for the given newly inserted entity""" |
|
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|
373 |
raise NotImplementedError(self) |
1792 | 374 |
|
0 | 375 |
def add_entity(self, session, entity): |
376 |
"""add a new entity to the source""" |
|
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|
377 |
raise NotImplementedError(self) |
1792 | 378 |
|
0 | 379 |
def update_entity(self, session, entity): |
380 |
"""update an entity in the source""" |
|
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|
381 |
raise NotImplementedError(self) |
0 | 382 |
|
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|
383 |
def delete_entities(self, session, entities): |
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|
384 |
"""delete several entities from the source""" |
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|
385 |
for entity in entities: |
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|
386 |
self.delete_entity(session, entity) |
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changeset
|
387 |
|
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|
388 |
def delete_entity(self, session, entity): |
0 | 389 |
"""delete an entity from the source""" |
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|
390 |
raise NotImplementedError(self) |
0 | 391 |
|
392 |
def add_relation(self, session, subject, rtype, object): |
|
393 |
"""add a relation to the source""" |
|
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|
394 |
raise NotImplementedError(self) |
1792 | 395 |
|
7237
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|
396 |
def add_relations(self, session, rtype, subj_obj_list): |
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|
397 |
"""add a relations to the source""" |
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changeset
|
398 |
# override in derived classes if you feel you can |
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changeset
|
399 |
# optimize |
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changeset
|
400 |
for subject, object in subj_obj_list: |
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[server] improve the speed of setting relations between entities (closes #1625257)
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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changeset
|
401 |
self.add_relation(session, subject, rtype, object) |
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[server] improve the speed of setting relations between entities (closes #1625257)
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents:
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changeset
|
402 |
|
0 | 403 |
def delete_relation(self, session, subject, rtype, object): |
404 |
"""delete a relation from the source""" |
|
8134
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changeset
|
405 |
raise NotImplementedError(self) |
0 | 406 |
|
407 |
# system source interface ################################################# |
|
408 |
||
409 |
def eid_type_source(self, session, eid): |
|
410 |
"""return a tuple (type, source, extid) for the entity with id <eid>""" |
|
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|
411 |
raise NotImplementedError(self) |
1792 | 412 |
|
0 | 413 |
def create_eid(self, session): |
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changeset
|
414 |
raise NotImplementedError(self) |
0 | 415 |
|
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parents:
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diff
changeset
|
416 |
def add_info(self, session, entity, source, extid): |
0 | 417 |
"""add type and source info for an eid into the system table""" |
8134
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|
418 |
raise NotImplementedError(self) |
0 | 419 |
|
4913
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parents:
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diff
changeset
|
420 |
def update_info(self, session, entity, need_fti_update): |
083b4d454192
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parents:
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changeset
|
421 |
"""mark entity as being modified, fulltext reindex if needed""" |
8134
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changeset
|
422 |
raise NotImplementedError(self) |
4913
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parents:
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changeset
|
423 |
|
4807
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[cleanup] add index_entity to abstract source, add docstring
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parents:
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diff
changeset
|
424 |
def index_entity(self, session, entity): |
5642bfa43236
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parents:
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changeset
|
425 |
"""create an operation to [re]index textual content of the given entity |
5642bfa43236
[cleanup] add index_entity to abstract source, add docstring
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parents:
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diff
changeset
|
426 |
on commit |
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changeset
|
427 |
""" |
8134
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changeset
|
428 |
raise NotImplementedError(self) |
4807
5642bfa43236
[cleanup] add index_entity to abstract source, add docstring
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changeset
|
429 |
|
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changeset
|
430 |
def fti_unindex_entities(self, session, entities): |
37668bf302f5
improve massive deletion performance
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changeset
|
431 |
"""remove text content for entities from the full text index |
0 | 432 |
""" |
8134
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add instance to not implemented error
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diff
changeset
|
433 |
raise NotImplementedError(self) |
1792 | 434 |
|
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improve massive deletion performance
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|
435 |
def fti_index_entities(self, session, entities): |
37668bf302f5
improve massive deletion performance
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|
436 |
"""add text content of created/modified entities to the full text index |
0 | 437 |
""" |
8134
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changeset
|
438 |
raise NotImplementedError(self) |
1792 | 439 |
|
0 | 440 |
# sql system source interface ############################################# |
441 |
||
442 |
def sqlexec(self, session, sql, args=None): |
|
443 |
"""execute the query and return its result""" |
|
8134
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Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
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diff
changeset
|
444 |
raise NotImplementedError(self) |
1792 | 445 |
|
0 | 446 |
def create_index(self, session, table, column, unique=False): |
8134
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parents:
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diff
changeset
|
447 |
raise NotImplementedError(self) |
1792 | 448 |
|
0 | 449 |
def drop_index(self, session, table, column, unique=False): |
8134
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add instance to not implemented error
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
7922
diff
changeset
|
450 |
raise NotImplementedError(self) |
0 | 451 |
|
7697
ef50074a0314
[repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
7552
diff
changeset
|
452 |
|
ef50074a0314
[repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
7552
diff
changeset
|
453 |
@deprecated('[3.13] use extid2eid(source, value, etype, session, **kwargs)') |
9662
f13ae1fea212
[repository] 'session' argument is always given to extid2eid, make it mandatory and simplify code accordingly
Julien Cristau <julien.cristau@logilab.fr>
parents:
9620
diff
changeset
|
454 |
def extid2eid(self, value, etype, session, **kwargs): |
7697
ef50074a0314
[repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
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diff
changeset
|
455 |
return self.repo.extid2eid(self, value, etype, session, **kwargs) |
ef50074a0314
[repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
7552
diff
changeset
|
456 |
|
ef50074a0314
[repo api] deprecates source.extid2eid, only the system source should implement it,
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parents:
7552
diff
changeset
|
457 |
|
6427
c8a5ac2d1eaa
[schema / sources] store data sources as cubicweb entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
6162
diff
changeset
|
458 |
|
0 | 459 |
from cubicweb.server import SOURCE_TYPES |
460 |
||
6427
c8a5ac2d1eaa
[schema / sources] store data sources as cubicweb entities
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parents:
6162
diff
changeset
|
461 |
def source_adapter(source_type): |
0 | 462 |
try: |
6427
c8a5ac2d1eaa
[schema / sources] store data sources as cubicweb entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
6162
diff
changeset
|
463 |
return SOURCE_TYPES[source_type] |
0 | 464 |
except KeyError: |
6427
c8a5ac2d1eaa
[schema / sources] store data sources as cubicweb entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
6162
diff
changeset
|
465 |
raise RuntimeError('Unknown source type %r' % source_type) |
1792 | 466 |
|
6945
28bf94d062a9
[sources] refactor source creation and options handling
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
6944
diff
changeset
|
467 |
def get_source(type, source_config, repo, eid): |
28bf94d062a9
[sources] refactor source creation and options handling
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
6944
diff
changeset
|
468 |
"""return a source adapter according to the adapter field in the source's |
28bf94d062a9
[sources] refactor source creation and options handling
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
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diff
changeset
|
469 |
configuration |
0 | 470 |
""" |
6945
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[sources] refactor source creation and options handling
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parents:
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diff
changeset
|
471 |
return source_adapter(type)(repo, source_config, eid) |