X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=bindings%2Fpython%2Fnotmuch%2Fdatabase.py;h=25b4b1b1ca33a3202f9f8042ff2cad05d8412823;hp=f1c1eb757cc8cc8026381f8fa93a18a7240ceeb5;hb=3434d194026ff65217d9342ffe511f67fd71e79f;hpb=8c51525e8213e074a845ad53d7196453952623dd diff --git a/bindings/python/notmuch/database.py b/bindings/python/notmuch/database.py index f1c1eb75..25b4b1b1 100644 --- a/bindings/python/notmuch/database.py +++ b/bindings/python/notmuch/database.py @@ -18,20 +18,37 @@ Copyright 2010 Sebastian Spaeth ' """ import os -from ctypes import c_int, c_char_p, c_void_p, c_uint, c_long, byref -from notmuch.globals import nmlib, STATUS, NotmuchError, Enum, _str +from ctypes import c_int, c_char_p, c_void_p, c_uint, c_long, byref, POINTER +from notmuch.globals import (nmlib, STATUS, NotmuchError, NotInitializedError, + NullPointerError, OutOfMemoryError, XapianError, Enum, _str, + NotmuchDatabaseP, NotmuchDirectoryP, NotmuchMessageP, NotmuchTagsP, + NotmuchQueryP, NotmuchMessagesP, NotmuchThreadsP, NotmuchFilenamesP) from notmuch.thread import Threads from notmuch.message import Messages, Message from notmuch.tag import Tags class Database(object): - """Represents a notmuch database (wraps notmuch_database_t) - - .. note:: Do remember that as soon as we tear down this object, - all underlying derived objects such as queries, threads, - messages, tags etc will be freed by the underlying library - as well. Accessing these objects will lead to segfaults and - other unexpected behavior. See above for more details. + """The :class:`Database` is the highest-level object that notmuch + provides. It references a notmuch database, and can be opened in + read-only or read-write mode. A :class:`Query` can be derived from + or be applied to a specific database to find messages. Also adding + and removing messages to the database happens via this + object. Modifications to the database are not atmic by default (see + :meth:`begin_atomic`) and once a database has been modified, all + other database objects pointing to the same data-base will throw an + :exc:`XapianError` as the underlying database has been + modified. Close and reopen the database to continue working with it. + + .. note:: Any function in this class can and will throw an + :exc:`NotInitializedError` if the database was not + intitialized properly. + + .. note:: Do remember that as soon as we tear down (e.g. via `del + db`) this object, all underlying derived objects such as + queries, threads, messages, tags etc will be freed by the + underlying library as well. Accessing these objects will lead + to segfaults and other unexpected behavior. See above for + more details. """ _std_db_path = None """Class attribute to cache user's default database""" @@ -41,39 +58,48 @@ class Database(object): """notmuch_database_get_directory""" _get_directory = nmlib.notmuch_database_get_directory - _get_directory.restype = c_void_p + _get_directory.argtypes = [NotmuchDatabaseP, c_char_p] + _get_directory.restype = NotmuchDirectoryP """notmuch_database_get_path""" _get_path = nmlib.notmuch_database_get_path + _get_path.argtypes = [NotmuchDatabaseP] _get_path.restype = c_char_p """notmuch_database_get_version""" _get_version = nmlib.notmuch_database_get_version + _get_version.argtypes = [NotmuchDatabaseP] _get_version.restype = c_uint """notmuch_database_open""" _open = nmlib.notmuch_database_open - _open.restype = c_void_p + _open.argtypes = [c_char_p, c_uint] + _open.restype = NotmuchDatabaseP """notmuch_database_upgrade""" _upgrade = nmlib.notmuch_database_upgrade - _upgrade.argtypes = [c_void_p, c_void_p, c_void_p] + _upgrade.argtypes = [NotmuchDatabaseP, c_void_p, c_void_p] + _upgrade.restype = c_uint """ notmuch_database_find_message""" _find_message = nmlib.notmuch_database_find_message - _find_message.restype = c_void_p + _find_message.argtypes = [NotmuchDatabaseP, c_char_p, POINTER(NotmuchMessageP)] + _find_message.restype = c_uint """notmuch_database_find_message_by_filename""" _find_message_by_filename = nmlib.notmuch_database_find_message_by_filename - _find_message_by_filename.restype = c_void_p + _find_message_by_filename.argtypes = [NotmuchDatabaseP, c_char_p, POINTER(NotmuchMessageP)] + _find_message_by_filename.restype = c_uint """notmuch_database_get_all_tags""" _get_all_tags = nmlib.notmuch_database_get_all_tags - _get_all_tags.restype = c_void_p + _get_all_tags.argtypes = [NotmuchDatabaseP] + _get_all_tags.restype = NotmuchTagsP """notmuch_database_create""" _create = nmlib.notmuch_database_create - _create.restype = c_void_p + _create.argtypes = [c_char_p] + _create.restype = NotmuchDatabaseP def __init__(self, path=None, create=False, mode=0): """If *path* is `None`, we will try to read a users notmuch @@ -93,8 +119,8 @@ class Database(object): :param mode: Mode to open a database in. Is always :attr:`MODE`.READ_WRITE when creating a new one. :type mode: :attr:`MODE` - :returns: Nothing - :exception: :exc:`NotmuchError` in case of failure. + :exception: :exc:`NotmuchError` or derived exception in case of + failure. """ self._db = None if path is None: @@ -110,9 +136,9 @@ class Database(object): self.create(path) def _assert_db_is_initialized(self): - """Raises a NotmuchError in case self._db is still None""" + """Raises :exc:`NotInitializedError` if self._db is `None`""" if self._db is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + raise NotInitializedError() def create(self, path): """Creates a new notmuch database @@ -128,7 +154,7 @@ class Database(object): :type path: str :returns: Nothing :exception: :exc:`NotmuchError` in case of any failure - (after printing an error message on stderr). + (possibly after printing an error message on stderr). """ if self._db is not None: raise NotmuchError(message="Cannot create db, this Database() " @@ -152,7 +178,7 @@ class Database(object): :type status: :attr:`MODE` :returns: Nothing :exception: Raises :exc:`NotmuchError` in case - of any failure (after printing an error message on stderr). + of any failure (possibly after printing an error message on stderr). """ res = Database._open(_str(path), mode) @@ -161,9 +187,7 @@ class Database(object): self._db = res def get_path(self): - """Returns the file path of an open database - - .. ..:: Wraps underlying `notmuch_database_get_path`""" + """Returns the file path of an open database""" self._assert_db_is_initialized() return Database._get_path(self._db).decode('utf-8') @@ -171,12 +195,14 @@ class Database(object): """Returns the database format version :returns: The database version as positive integer - :exception: :exc:`NotmuchError` with :attr:`STATUS`.NOT_INITIALIZED if - the database was not intitialized. """ self._assert_db_is_initialized() return Database._get_version(self._db) + _needs_upgrade = nmlib.notmuch_database_needs_upgrade + _needs_upgrade.argtypes = [NotmuchDatabaseP] + _needs_upgrade.restype = bool + def needs_upgrade(self): """Does this database need to be upgraded before writing to it? @@ -186,11 +212,9 @@ class Database(object): etc.) will work unless :meth:`upgrade` is called successfully first. :returns: `True` or `False` - :exception: :exc:`NotmuchError` with :attr:`STATUS`.NOT_INITIALIZED if - the database was not intitialized. """ self._assert_db_is_initialized() - return nmlib.notmuch_database_needs_upgrade(self._db) + return self._needs_upgrade(self._db) def upgrade(self): """Upgrades the current database @@ -212,6 +236,10 @@ class Database(object): #TODO: catch exceptions, document return values and etc return status + _begin_atomic = nmlib.notmuch_database_begin_atomic + _begin_atomic.argtypes = [NotmuchDatabaseP] + _begin_atomic.restype = c_uint + def begin_atomic(self): """Begin an atomic database operation @@ -229,11 +257,15 @@ class Database(object): *Added in notmuch 0.9*""" self._assert_db_is_initialized() - status = nmlib.notmuch_database_begin_atomic(self._db) + status = self._begin_atomic(self._db) if status != STATUS.SUCCESS: raise NotmuchError(status) return status + _end_atomic = nmlib.notmuch_database_end_atomic + _end_atomic.argtypes = [NotmuchDatabaseP] + _end_atomic.restype = c_uint + def end_atomic(self): """Indicate the end of an atomic database operation @@ -251,7 +283,7 @@ class Database(object): *Added in notmuch 0.9*""" self._assert_db_is_initialized() - status = nmlib.notmuch_database_end_atomic(self._db) + status = self._end_atomic(self._db) if status != STATUS.SUCCESS: raise NotmuchError(status) return status @@ -268,15 +300,10 @@ class Database(object): of database (see :meth:`get_path`), or else should be an absolute path with initial components that match the path of 'database'. :returns: :class:`Directory` or raises an exception. - :exception: :exc:`NotmuchError` - - :attr:`STATUS`.NOT_INITIALIZED - If the database was not intitialized. - - :attr:`STATUS`.FILE_ERROR + :exception: + :exc:`NotmuchError` with :attr:`STATUS`.FILE_ERROR If path is not relative database or absolute with initial components same as database. - """ self._assert_db_is_initialized() # sanity checking if path is valid, and make path absolute @@ -297,6 +324,10 @@ class Database(object): # return the Directory, init it with the absolute path return Directory(_str(abs_dirpath), dir_p, self) + _add_message = nmlib.notmuch_database_add_message + _add_message.argtypes = [NotmuchDatabaseP, c_char_p, POINTER(NotmuchMessageP)] + _add_message.restype = c_uint + def add_message(self, filename, sync_maildir_flags=False): """Adds a new message to the database @@ -345,14 +376,10 @@ class Database(object): :attr:`STATUS`.READ_ONLY_DATABASE Database was opened in read-only mode so no message can be added. - :attr:`STATUS`.NOT_INITIALIZED - The database has not been initialized. """ self._assert_db_is_initialized() msg_p = c_void_p() - status = nmlib.notmuch_database_add_message(self._db, - _str(filename), - byref(msg_p)) + status = self._add_message(self._db, _str(filename), byref(msg_p)) if not status in [STATUS.SUCCESS, STATUS.DUPLICATE_MESSAGE_ID]: raise NotmuchError(status) @@ -364,6 +391,10 @@ class Database(object): msg.maildir_flags_to_tags() return (msg, status) + _remove_message = nmlib.notmuch_database_remove_message + _remove_message.argtypes = [NotmuchDatabaseP, c_char_p] + _remove_message.restype = c_uint + def remove_message(self, filename): """Removes a message (filename) from the given notmuch database @@ -390,12 +421,9 @@ class Database(object): :attr:`STATUS`.READ_ONLY_DATABASE Database was opened in read-only mode so no message can be removed. - :attr:`STATUS`.NOT_INITIALIZED - The database has not been initialized. """ self._assert_db_is_initialized() - return nmlib.notmuch_database_remove_message(self._db, - filename) + return self._remove_message(self._db, filename) def find_message(self, msgid): """Returns a :class:`Message` as identified by its message ID @@ -403,20 +431,25 @@ class Database(object): Wraps the underlying *notmuch_database_find_message* function. :param msgid: The message ID - :type msgid: string - :returns: :class:`Message` or `None` if no message is found or - if any xapian exception or out-of-memory situation - occurs. Do note that Xapian Exceptions include - "Database modified" situations, e.g. when the - notmuch database has been modified by - another program in the meantime. A return value of - `None` is therefore no guarantee that the message - does not exist. - :exception: :exc:`NotmuchError` with :attr:`STATUS`.NOT_INITIALIZED if - the database was not intitialized. + :type msgid: unicode or str + :returns: :class:`Message` or `None` if no message is found. + :exception: + :exc:`OutOfMemoryError` + If an Out-of-memory occured while constructing the message. + :exc:`XapianError` + In case of a Xapian Exception. These exceptions + include "Database modified" situations, e.g. when the + notmuch database has been modified by another program + in the meantime. In this case, you should close and + reopen the database and retry. + :exc:`NotInitializedError` if + the database was not intitialized. """ self._assert_db_is_initialized() - msg_p = Database._find_message(self._db, _str(msgid)) + msg_p = c_void_p() + status = Database._find_message(self._db, _str(msgid), byref(msg_p)) + if status != STATUS.SUCCESS: + raise NotmuchError(status) return msg_p and Message(msg_p, self) or None def find_message_by_filename(self, filename): @@ -429,15 +462,28 @@ class Database(object): :returns: If the database contains a message with the given filename, then a class:`Message:` is returned. This - function returns None in the following situations: + function returns None if no message is found with the given + filename. - * No message is found with the given filename - * An out-of-memory situation occurs - * A Xapian exception occurs + :exception: + :exc:`OutOfMemoryError` + If an Out-of-memory occured while constructing the message. + :exc:`XapianError` + In case of a Xapian Exception. These exceptions + include "Database modified" situations, e.g. when the + notmuch database has been modified by another program + in the meantime. In this case, you should close and + reopen the database and retry. + :exc:`NotInitializedError` if + the database was not intitialized. *Added in notmuch 0.9*""" self._assert_db_is_initialized() - msg_p = Database._find_message_by_filename(self._db, _str(filename)) + msg_p = c_void_p() + status = Database._find_message_by_filename(self._db, _str(filename), + byref(msg_p)) + if status != STATUS.SUCCESS: + raise NotmuchError(status) return msg_p and Message(msg_p, self) or None def get_all_tags(self): @@ -470,16 +516,19 @@ class Database(object): This function is a python extension and not in the underlying C API. """ - self._assert_db_is_initialized() return Query(self, querystring) def __repr__(self): return "'Notmuch DB " + self.get_path() + "'" + _close = nmlib.notmuch_database_close + _close.argtypes = [NotmuchDatabaseP] + _close.restype = None + def __del__(self): """Close and free the notmuch database if needed""" if self._db is not None: - nmlib.notmuch_database_close(self._db) + self._close(self._db) def _get_user_default_db(self): """ Reads a user's notmuch config and returns his db location @@ -511,11 +560,12 @@ class Query(object): A query selects and filters a subset of messages from the notmuch database we derive from. - Query() provides an instance attribute :attr:`sort`, which + :class:`Query` provides an instance attribute :attr:`sort`, which contains the sort order (if specified via :meth:`set_sort`) or `None`. - Technically, it wraps the underlying *notmuch_query_t* struct. + Any function in this class may throw an :exc:`NotInitializedError` + in case the underlying query object was not set up correctly. .. note:: Do remember that as soon as we tear down this object, all underlying derived objects such as threads, @@ -529,18 +579,22 @@ class Query(object): """notmuch_query_create""" _create = nmlib.notmuch_query_create - _create.restype = c_void_p + _create.argtypes = [NotmuchDatabaseP, c_char_p] + _create.restype = NotmuchQueryP """notmuch_query_search_threads""" _search_threads = nmlib.notmuch_query_search_threads - _search_threads.restype = c_void_p + _search_threads.argtypes = [NotmuchQueryP] + _search_threads.restype = NotmuchThreadsP """notmuch_query_search_messages""" _search_messages = nmlib.notmuch_query_search_messages - _search_messages.restype = c_void_p + _search_messages.argtypes = [NotmuchQueryP] + _search_messages.restype = NotmuchMessagesP """notmuch_query_count_messages""" _count_messages = nmlib.notmuch_query_count_messages + _count_messages.argtypes = [NotmuchQueryP] _count_messages.restype = c_uint def __init__(self, db, querystr): @@ -555,6 +609,11 @@ class Query(object): self.sort = None self.create(db, querystr) + def _assert_query_is_initialized(self): + """Raises :exc:`NotInitializedError` if self._query is `None`""" + if self._query is None: + raise NotInitializedError() + def create(self, db, querystr): """Creates a new query derived from a Database @@ -566,37 +625,33 @@ class Query(object): :param querystr: The query string :type querystr: utf-8 encoded str or unicode :returns: Nothing - :exception: :exc:`NotmuchError` - - * :attr:`STATUS`.NOT_INITIALIZED if db is not inited - * :attr:`STATUS`.NULL_POINTER if the query creation failed - (too little memory) + :exception: + :exc:`NullPointerError` if the query creation failed + (e.g. too little memory). + :exc:`NotInitializedError` if the underlying db was not + intitialized. """ - if db.db_p is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + db._assert_db_is_initialized() # create reference to parent db to keep it alive self._db = db # create query, return None if too little mem available query_p = Query._create(db.db_p, _str(querystr)) if query_p is None: - raise NotmuchError(STATUS.NULL_POINTER) + raise NullPointerError self._query = query_p + _set_sort = nmlib.notmuch_query_set_sort + _set_sort.argtypes = [NotmuchQueryP, c_uint] + _set_sort.argtypes = None + def set_sort(self, sort): """Set the sort order future results will be delivered in - Wraps the underlying *notmuch_query_set_sort* function. - :param sort: Sort order (see :attr:`Query.SORT`) - :returns: Nothing - :exception: :exc:`NotmuchError` :attr:`STATUS`.NOT_INITIALIZED if query has not - been initialized. """ - if self._query is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - + self._assert_query_is_initialized() self.sort = sort - nmlib.notmuch_query_set_sort(self._query, sort) + self._set_sort(self._query, sort) def search_threads(self): """Execute a query for threads @@ -609,46 +664,28 @@ class Query(object): match the query. The method :meth:`Message.get_flag` allows us to get the value of this flag. - Technically, it wraps the underlying - *notmuch_query_search_threads* function. - :returns: :class:`Threads` - :exception: :exc:`NotmuchError` - - * :attr:`STATUS`.NOT_INITIALIZED if query is not inited - * :attr:`STATUS`.NULL_POINTER if search_threads failed + :exception: :exc:`NullPointerError` if search_threads failed """ - if self._query is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - + self._assert_query_is_initialized() threads_p = Query._search_threads(self._query) if threads_p is None: - raise NotmuchError(STATUS.NULL_POINTER) - + raise NullPointerError return Threads(threads_p, self) def search_messages(self): """Filter messages according to the query and return :class:`Messages` in the defined sort order - Technically, it wraps the underlying - *notmuch_query_search_messages* function. - :returns: :class:`Messages` - :exception: :exc:`NotmuchError` - - * :attr:`STATUS`.NOT_INITIALIZED if query is not inited - * :attr:`STATUS`.NULL_POINTER if search_messages failed + :exception: :exc:`NullPointerError` if search_messages failed """ - if self._query is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - + self._assert_query_is_initialized() msgs_p = Query._search_messages(self._query) if msgs_p is None: - raise NotmuchError(STATUS.NULL_POINTER) - + raise NullPointerError return Messages(msgs_p, self) def count_messages(self): @@ -662,19 +699,18 @@ class Query(object): *notmuch_query_count_messages* function. :returns: :class:`Messages` - :exception: :exc:`NotmuchError` - - * :attr:`STATUS`.NOT_INITIALIZED if query is not inited """ - if self._query is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - + self._assert_query_is_initialized() return Query._count_messages(self._query) + _destroy = nmlib.notmuch_query_destroy + _destroy.argtypes = [NotmuchQueryP] + _destroy.restype = None + def __del__(self): """Close and free the Query""" if self._query is not None: - nmlib.notmuch_query_destroy(self._query) + self._destroy(self._query) class Directory(object): @@ -693,19 +729,23 @@ class Directory(object): """notmuch_directory_get_mtime""" _get_mtime = nmlib.notmuch_directory_get_mtime + _get_mtime.argtypes = [NotmuchDirectoryP] _get_mtime.restype = c_long """notmuch_directory_set_mtime""" _set_mtime = nmlib.notmuch_directory_set_mtime - _set_mtime.argtypes = [c_char_p, c_long] + _set_mtime.argtypes = [NotmuchDirectoryP, c_long] + _set_mtime.restype = c_uint """notmuch_directory_get_child_files""" _get_child_files = nmlib.notmuch_directory_get_child_files - _get_child_files.restype = c_void_p + _get_child_files.argtypes = [NotmuchDirectoryP] + _get_child_files.restype = NotmuchFilenamesP """notmuch_directory_get_child_directories""" _get_child_directories = nmlib.notmuch_directory_get_child_directories - _get_child_directories.restype = c_void_p + _get_child_directories.argtypes = [NotmuchDirectoryP] + _get_child_directories.restype = NotmuchFilenamesP def _assert_dir_is_initialized(self): """Raises a NotmuchError(:attr:`STATUS`.NOT_INITIALIZED) if dir_p is None""" @@ -825,10 +865,14 @@ class Directory(object): """Object representation""" return "" % self._path + _destroy = nmlib.notmuch_directory_destroy + _destroy.argtypes = [NotmuchDirectoryP] + _destroy.argtypes = None + def __del__(self): """Close and free the Directory""" if self._dir_p is not None: - nmlib.notmuch_directory_destroy(self._dir_p) + self._destroy(self._dir_p) class Filenames(object): @@ -836,6 +880,7 @@ class Filenames(object): #notmuch_filenames_get _get = nmlib.notmuch_filenames_get + _get.argtypes = [NotmuchFilenamesP] _get.restype = c_char_p def __init__(self, files_p, parent): @@ -854,16 +899,24 @@ class Filenames(object): """ Make Filenames an iterator """ return self + _valid = nmlib.notmuch_filenames_valid + _valid.argtypes = [NotmuchFilenamesP] + _valid.restype = bool + + _move_to_next = nmlib.notmuch_filenames_move_to_next + _move_to_next.argtypes = [NotmuchFilenamesP] + _move_to_next.restype = None + def next(self): if self._files_p is None: raise NotmuchError(STATUS.NOT_INITIALIZED) - if not nmlib.notmuch_filenames_valid(self._files_p): + if not self._valid(self._files_p): self._files_p = None raise StopIteration file = Filenames._get(self._files_p) - nmlib.notmuch_filenames_move_to_next(self._files_p) + self._move_to_next(self._files_p) return file def __len__(self): @@ -882,13 +935,17 @@ class Filenames(object): raise NotmuchError(STATUS.NOT_INITIALIZED) i = 0 - while nmlib.notmuch_filenames_valid(self._files_p): - nmlib.notmuch_filenames_move_to_next(self._files_p) + while self._valid(self._files_p): + self._move_to_next(self._files_p) i += 1 self._files_p = None return i + _destroy = nmlib.notmuch_filenames_destroy + _destroy.argtypes = [NotmuchFilenamesP] + _destroy.restype = None + def __del__(self): """Close and free Filenames""" if self._files_p is not None: - nmlib.notmuch_filenames_destroy(self._files_p) + self._destroy(self._files_p)