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"""Registry that keeps track of Annif projects""" |
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import collections |
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import configparser |
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import os.path |
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from flask import current_app |
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import annif |
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import annif.util |
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from annif.exception import ConfigurationException |
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from annif.project import Access, AnnifProject |
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logger = annif.logger |
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class AnnifRegistry: |
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"""Class that keeps track of the Annif projects""" |
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# Note: The individual projects are stored in a shared static variable, |
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# keyed by the "registry ID" which is unique to the registry instance. |
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# This is done to make it possible to serialize AnnifRegistry instances |
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# without including the potentially huge project objects (which contain |
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# backends with large models, vocabularies with lots of concepts etc). |
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# Serialized AnnifRegistry instances can then be passed between |
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# processes when using the multiprocessing module. |
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_projects = {} |
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def __init__(self, projects_file, datadir, init_projects): |
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self._rid = id(self) |
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self._projects[self._rid] = \ |
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self._create_projects(projects_file, datadir) |
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if init_projects: |
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for project in self._projects[self._rid].values(): |
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project.initialize() |
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def _create_projects(self, projects_file, datadir): |
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if not os.path.exists(projects_file): |
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logger.warning( |
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'Project configuration file "%s" is missing. ' + |
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'Please provide one. You can set the path to the project ' + |
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'configuration file using the ANNIF_PROJECTS environment ' + |
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'variable or the command-line option "--projects".', |
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projects_file) |
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return {} |
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config = configparser.ConfigParser() |
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config.optionxform = annif.util.identity |
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with open(projects_file, encoding='utf-8-sig') as projf: |
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try: |
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config.read_file(projf) |
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except (configparser.DuplicateOptionError, |
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configparser.DuplicateSectionError) as err: |
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raise ConfigurationException(err) |
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# create AnnifProject objects from the configuration file |
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projects = collections.OrderedDict() |
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for project_id in config.sections(): |
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projects[project_id] = AnnifProject(project_id, |
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config[project_id], |
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datadir, |
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self) |
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return projects |
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def get_projects(self, min_access=Access.private): |
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"""Return the available projects as a dict of project_id -> |
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AnnifProject. The min_access parameter may be used to set the minimum |
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access level required for the returned projects.""" |
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return {project_id: project |
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for project_id, project in self._projects[self._rid].items() |
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if project.access >= min_access} |
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def get_project(self, project_id, min_access=Access.private): |
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"""return the definition of a single Project by project_id""" |
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projects = self.get_projects(min_access) |
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try: |
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return projects[project_id] |
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except KeyError: |
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raise ValueError("No such project {}".format(project_id)) |
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def initialize_projects(app): |
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projects_file = app.config['PROJECTS_FILE'] |
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datadir = app.config['DATADIR'] |
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init_projects = app.config['INITIALIZE_PROJECTS'] |
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app.annif_registry = AnnifRegistry(projects_file, datadir, init_projects) |
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def get_projects(min_access=Access.private): |
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"""Return the available projects as a dict of project_id -> |
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AnnifProject. The min_access parameter may be used to set the minimum |
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access level required for the returned projects.""" |
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if not hasattr(current_app, 'annif_registry'): |
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initialize_projects(current_app) |
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return current_app.annif_registry.get_projects(min_access) |
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def get_project(project_id, min_access=Access.private): |
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"""return the definition of a single Project by project_id""" |
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projects = get_projects(min_access) |
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try: |
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return projects[project_id] |
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except KeyError: |
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raise ValueError("No such project {}".format(project_id)) |
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NatLibFi /
Annif
