e_book_backend_get_cache_dir ()

const gchar *
e_book_backend_get_cache_dir (EBookBackend *backend);

Returns the cache directory path used by backend .

Since: 2.32

e_book_backend_dup_cache_dir ()

gchar *
e_book_backend_dup_cache_dir (EBookBackend *backend);

Thread-safe variation of e_book_backend_get_cache_dir(). Use this function when accessing backend from multiple threads.

The returned string should be freed with g_free() when no longer needed.

Since: 3.10

e_book_backend_set_cache_dir ()

void
e_book_backend_set_cache_dir (EBookBackend *backend,
                              const gchar *cache_dir);

Sets the cache directory path for use by backend .

Note that EBookBackend is initialized with a default cache directory path which should suffice for most cases. Backends should not override the default path without good reason.

Since: 2.32

e_book_backend_ref_data_book ()

EDataBook *
e_book_backend_ref_data_book (EBookBackend *backend);

Returns the EDataBook for backend . The EDataBook is essentially the glue between incoming D-Bus requests and backend 's native API.

An EDataBook should be set only once after backend is first created. If an EDataBook has not yet been set, the function returns NULL.

The returned EDataBook is referenced for thread-safety and must be unreferenced with g_object_unref() when finished with it.

Since: 3.10

e_book_backend_set_data_book ()

void
e_book_backend_set_data_book (EBookBackend *backend,
                              EDataBook *data_book);

Sets the EDataBook for backend . The EDataBook is essentially the glue between incoming D-Bus requests and backend 's native API.

An EDataBook should be set only once after backend is first created.

Since: 3.10

e_book_backend_ref_proxy_resolver ()

GProxyResolver *
e_book_backend_ref_proxy_resolver (EBookBackend *backend);

Returns the GProxyResolver for backend (if applicable), as indicated by the “proxy-uid” of backend 's “source” or one of its ancestors.

The returned GProxyResolver is referenced for thread-safety and must be unreferenced with g_object_unref() when finished with it.

Since: 3.12

e_book_backend_get_registry ()

ESourceRegistry *
e_book_backend_get_registry (EBookBackend *backend);

Returns the data source registry to which “source” belongs.

Since: 3.6

e_book_backend_get_writable ()

gboolean
e_book_backend_get_writable (EBookBackend *backend);

Returns whether backend will accept changes to its data content.

Since: 3.8

e_book_backend_set_writable ()

void
e_book_backend_set_writable (EBookBackend *backend,
                             gboolean writable);

Sets whether backend will accept changes to its data content.

Since: 3.8

e_book_backend_is_opened ()

gboolean
e_book_backend_is_opened (EBookBackend *backend);

Checks if backend 's storage has been opened (and authenticated, if necessary) and the backend itself is ready for accessing. This property is changed automatically within call of e_book_backend_notify_opened().

Since: 3.2

e_book_backend_is_readonly ()

gboolean
e_book_backend_is_readonly (EBookBackend *backend);

Checks if we can write to backend .

Since: 3.2

e_book_backend_get_backend_property ()

gchar *
e_book_backend_get_backend_property (EBookBackend *backend,
                                     const gchar *prop_name);

Obtains the value of the backend property named prop_name . Freed the returned string with g_free() when finished with it.

Since: 3.10

e_book_backend_open_sync ()

gboolean
e_book_backend_open_sync (EBookBackend *backend,
                          GCancellable *cancellable,
                          GError **error);

"Opens" the backend . Opening a backend is something of an outdated concept, but the operation is hanging around for a little while longer. This usually involves some custom initialization logic, and testing of remote authentication if applicable.

If an error occurs, the function will set error and return FALSE.

Since: 3.10

e_book_backend_open ()

void
e_book_backend_open (EBookBackend *backend,
                     GCancellable *cancellable,
                     GAsyncReadyCallback callback,
                     gpointer user_data);

Asynchronously "opens" the backend . Opening a backend is something of an outdated concept, but the operation is hanging around for a little while longer. This usually involves some custom initialization logic, and testing of remote authentication if applicable.

When the operation is finished, callback will be called. You can then call e_book_backend_open_finish() to get the result of the operation.

Since: 3.10

e_book_backend_open_finish ()

gboolean
e_book_backend_open_finish (EBookBackend *backend,
                            GAsyncResult *result,
                            GError **error);

Finishes the operation started with e_book_backend_open().

If an error occurred, the function will set error and return FALSE.

Since: 3.10

e_book_backend_refresh_sync ()

gboolean
e_book_backend_refresh_sync (EBookBackend *backend,
                             GCancellable *cancellable,
                             GError **error);

Initiates a refresh for backend , if the backend supports refreshing. The actual refresh operation completes on its own time. This function merely initiates the operation.

If an error occurs while initiating the refresh, the function will set error and return FALSE. If the backend does not support refreshing, the function will set an E_CLIENT_ERROR_NOT_SUPPORTED error and return FALSE.

Since: 3.10

e_book_backend_refresh ()

void
e_book_backend_refresh (EBookBackend *backend,
                        GCancellable *cancellable,
                        GAsyncReadyCallback callback,
                        gpointer user_data);

Asynchronously initiates a refresh for backend , if the backend supports refreshing. The actual refresh operation completes on its own time. This function, along with e_book_backend_refresh_finish(), merely initiates the operation.

Once the refresh is initiated, callback will be called. You can then call e_book_backend_refresh_finish() to get the result of the initiation.

Since: 3.10

e_book_backend_refresh_finish ()

gboolean
e_book_backend_refresh_finish (EBookBackend *backend,
                               GAsyncResult *result,
                               GError **error);

Finishes the refresh initiation started with e_book_backend_refresh().

If an error occurred while initiating the refresh, the function will set error and return FALSE. If the backend does not support refreshing, the function will set an E_CLIENT_ERROR_NOT_SUPPORTED error and return FALSE.

Since: 3.10

e_book_backend_create_contacts_sync ()

gboolean
e_book_backend_create_contacts_sync (EBookBackend *backend,
                                     const gchar * const *vcards,
                                     GQueue *out_contacts,
                                     GCancellable *cancellable,
                                     GError **error);

Creates one or more new contacts from vcards , and deposits an EContact instance for each newly-created contact in out_contacts .

The returned EContact instances are referenced for thread-safety and must be unreferenced with g_object_unref() when finished with them.

If an error occurs, the function will set error and return FALSE.

Since: 3.10

e_book_backend_create_contacts ()

void
e_book_backend_create_contacts (EBookBackend *backend,
                                const gchar * const *vcards,
                                GCancellable *cancellable,
                                GAsyncReadyCallback callback,
                                gpointer user_data);

Asynchronously creates one or more new contacts from vcards .

When the operation is finished, callback will be called. You can then call e_book_backend_create_contacts_finish() to get the result of the operation.

Since: 3.10

e_book_backend_create_contacts_finish ()

gboolean
e_book_backend_create_contacts_finish (EBookBackend *backend,
                                       GAsyncResult *result,
                                       GQueue *out_contacts,
                                       GError **error);

Finishes the operation started with e_book_backend_create_contacts().

An EContact instance for each newly-created contact is deposited in out_contacts . The returned EContact instances are referenced for thread-safety and must be unreferenced with g_object_unref() when finished with them.

If an error occurred, the function will set error and return FALSE.

Since: 3.10

e_book_backend_modify_contacts_sync ()

gboolean
e_book_backend_modify_contacts_sync (EBookBackend *backend,
                                     const gchar * const *vcards,
                                     GCancellable *cancellable,
                                     GError **error);

Modifies one or more contacts according to vcards .

If an error occurs, the function will set error and return FALSE.

Since: 3.10

e_book_backend_modify_contacts ()

void
e_book_backend_modify_contacts (EBookBackend *backend,
                                const gchar * const *vcards,
                                GCancellable *cancellable,
                                GAsyncReadyCallback callback,
                                gpointer user_data);

Asynchronously modifies one or more contacts according to vcards .

When the operation is finished, callback will be called. You can then call e_book_backend_modify_contacts_finish() to get the result of the operation.

Since: 3.10

e_book_backend_modify_contacts_finish ()

gboolean
e_book_backend_modify_contacts_finish (EBookBackend *backend,
                                       GAsyncResult *result,
                                       GError **error);

Finishes the operation started with e_book_backend_modify_contacts().

If an error occurred, the function will set error and return FALSE.

Since: 3.10

e_book_backend_remove_contacts_sync ()

gboolean
e_book_backend_remove_contacts_sync (EBookBackend *backend,
                                     const gchar * const *uids,
                                     GCancellable *cancellable,
                                     GError **error);

Removes one or more contacts according to uids .

If an error occurs, the function will set error and return FALSE.

Since: 3.10

e_book_backend_remove_contacts ()

void
e_book_backend_remove_contacts (EBookBackend *backend,
                                const gchar * const *uids,
                                GCancellable *cancellable,
                                GAsyncReadyCallback callback,
                                gpointer user_data);

Asynchronously removes one or more contacts according to uids .

When the operation is finished, callback will be called. You can then call e_book_backend_remove_contacts_finish() to get the result of the operation.

Since: 3.10

e_book_backend_remove_contacts_finish ()

gboolean
e_book_backend_remove_contacts_finish (EBookBackend *backend,
                                       GAsyncResult *result,
                                       GError **error);

Finishes the operation started with e_book_backend_remove_contacts().

If an error occurred, the function will set error and return FALSE.

Since: 3.10

e_book_backend_get_contact_sync ()

EContact *
e_book_backend_get_contact_sync (EBookBackend *backend,
                                 const gchar *uid,
                                 GCancellable *cancellable,
                                 GError **error);

Obtains an EContact for uid .

The returned EContact is referenced for thread-safety and must be unreferenced with g_object_unref() when finished with it.

If an error occurs, the function will set error and return NULL.

Since: 3.10

e_book_backend_get_contact ()

void
e_book_backend_get_contact (EBookBackend *backend,
                            const gchar *uid,
                            GCancellable *cancellable,
                            GAsyncReadyCallback callback,
                            gpointer user_data);

Asynchronously obtains an EContact for uid .

When the operation is finished, callback will be called. You can then call e_book_backend_get_contact_finish() to get the result of the operation.

Since: 3.10

e_book_backend_get_contact_finish ()

EContact *
e_book_backend_get_contact_finish (EBookBackend *backend,
                                   GAsyncResult *result,
                                   GError **error);

Finishes the operation started with e_book_backend_get_contact_finish().

The returned EContact is referenced for thread-safety and must be unreferenced with g_object_unref() when finished with it.

If an error occurred, the function will set error and return NULL.

Since: 3.10

e_book_backend_get_contact_list_sync ()

gboolean
e_book_backend_get_contact_list_sync (EBookBackend *backend,
                                      const gchar *query,
                                      GQueue *out_contacts,
                                      GCancellable *cancellable,
                                      GError **error);

Obtains a set of EContact instances which satisfy the criteria specified in query , and deposits them in out_contacts .

The returned EContact instances are referenced for thread-safety and must be unreferenced with g_object_unref() when finished with them.

If an error occurs, the function will set error and return FALSE. Note that an empty result set does not necessarily imply an error.

Since: 3.10

e_book_backend_get_contact_list ()

void
e_book_backend_get_contact_list (EBookBackend *backend,
                                 const gchar *query,
                                 GCancellable *cancellable,
                                 GAsyncReadyCallback callback,
                                 gpointer user_data);

Asynchronously obtains a set of EContact instances which satisfy the criteria specified in query .

When the operation is finished, callback will be called. You can then call e_book_backend_get_contact_list_finish() to get the result of the operation.

Since: 3.10

e_book_backend_get_contact_list_finish ()

gboolean
e_book_backend_get_contact_list_finish
                               (EBookBackend *backend,
                                GAsyncResult *result,
                                GQueue *out_contacts,
                                GError **error);

Finishes the operation started with e_book_backend_get_contact_list().

The matching EContact instances are deposited in out_contacts . The returned EContact instances are referenced for thread-safety and must be unreferenced with g_object_unref() when finished with them.

If an error occurred, the function will set error and return FALSE. Note that an empty result set does not necessarily imply an error.

Since: 3.10

e_book_backend_get_contact_list_uids_sync ()

gboolean
e_book_backend_get_contact_list_uids_sync
                               (EBookBackend *backend,
                                const gchar *query,
                                GQueue *out_uids,
                                GCancellable *cancellable,
                                GError **error);

Obtains a set of ID strings for contacts which satisfy the criteria specified in query , and deposits them in out_uids .

The returned ID strings must be freed with g_free() with finished with them.

If an error occurs, the function will set error and return FALSE. Note that an empty result set does not necessarily imply an error.

Since: 3.10

e_book_backend_get_contact_list_uids ()

void
e_book_backend_get_contact_list_uids (EBookBackend *backend,
                                      const gchar *query,
                                      GCancellable *cancellable,
                                      GAsyncReadyCallback callback,
                                      gpointer user_data);

Asynchronously obtains a set of ID strings for contacts which satisfy the criteria specified in query .

When the operation is finished, callback will be called. You can then call e_book_backend_get_contact_list_uids_finish() to get the result of the operation.

Since: 3.10

e_book_backend_get_contact_list_uids_finish ()

gboolean
e_book_backend_get_contact_list_uids_finish
                               (EBookBackend *backend,
                                GAsyncResult *result,
                                GQueue *out_uids,
                                GError **error);

Finishes the operation started with e_book_backend_get_contact_list_uids_finish().

ID strings for the matching contacts are deposited in out_uids , and must be freed with g_free() when finished with them.

If an error occurs, the function will set error and return FALSE. Note that an empty result set does not necessarily imply an error.

Since: 3.10

e_book_backend_start_view ()

void
e_book_backend_start_view (EBookBackend *backend,
                           EDataBookView *view);

Starts running the query specified by view , emitting signals for matching contacts.

e_book_backend_stop_view ()

void
e_book_backend_stop_view (EBookBackend *backend,
                          EDataBookView *view);

Stops running the query specified by view , emitting no more signals.

e_book_backend_add_view ()

void
e_book_backend_add_view (EBookBackend *backend,
                         EDataBookView *view);

Adds view to backend for querying.

e_book_backend_remove_view ()

void
e_book_backend_remove_view (EBookBackend *backend,
                            EDataBookView *view);

Removes view from backend .

e_book_backend_list_views ()

GList *
e_book_backend_list_views (EBookBackend *backend);

Returns a list of EDataBookView instances added with e_book_backend_add_view().

The views returned in the list are referenced for thread-safety. They must each be unreferenced with g_object_unref() when finished with them. Free the returned list itself with g_list_free().

An easy way to free the list properly in one step is as follows:

1

g_list_free_full (list, g_object_unref);

Since: 3.8

e_book_backend_notify_update ()

void
e_book_backend_notify_update (EBookBackend *backend,
                              const EContact *contact);

Notifies all of backend 's book views about the new or modified contacts contact .

e_data_book_respond_create_contacts() and e_data_book_respond_modify_contacts() call this function for you. You only need to call this from your backend if contacts are created or modified by another (non-PAS-using) client.

e_book_backend_notify_remove ()

void
e_book_backend_notify_remove (EBookBackend *backend,
                              const gchar *id);

Notifies all of backend 's book views that the contact with UID id has been removed.

e_data_book_respond_remove_contacts() calls this function for you. You only need to call this from your backend if contacts are removed by another (non-PAS-using) client.

e_book_backend_notify_complete ()

void
e_book_backend_notify_complete (EBookBackend *backend);

Notifies all of backend 's book views that the current set of notifications is complete; use this after a series of e_book_backend_notify_update() and e_book_backend_notify_remove() calls.

e_book_backend_notify_error ()

void
e_book_backend_notify_error (EBookBackend *backend,
                             const gchar *message);

Notifies each backend listener about an error. This is meant to be used for cases where is no GError return possibility, to notify user about an issue.

Since: 3.2

e_book_backend_notify_property_changed ()

void
e_book_backend_notify_property_changed
                               (EBookBackend *backend,
                                const gchar *prop_name,
                                const gchar *prop_value);

Notifies clients about property value change.

Since: 3.2

e_book_backend_get_direct_book ()

EDataBookDirect *
e_book_backend_get_direct_book (EBookBackend *backend);

Tries to create an EDataBookDirect for backend if backend supports direct read access.

Since: 3.8

e_book_backend_configure_direct ()

void
e_book_backend_configure_direct (EBookBackend *backend,
                                 const gchar *config);

This method is called on backend in direct read access mode. The config argument is the same configuration string which the same backend reported in the EDataBookDirect returned by e_book_backend_get_direct_book().

The configuration string is optional and is used to ensure that direct access backends are properly configured to interface with the same data as the running server side backend.

Since: 3.8

e_book_backend_sync ()

void
e_book_backend_sync (EBookBackend *backend);

Write all pending data to disk. This is only required under special circumstances (for example before a live backup) and should not be used in normal use.

Since: 1.12

e_book_backend_set_locale ()

gboolean
e_book_backend_set_locale (EBookBackend *backend,
                           const gchar *locale,
                           GCancellable *cancellable,
                           GError **error);

Notify the addressbook backend that the current locale has changed, this is important for backends which support ordered result lists which are locale sensitive.

Since: 3.12

e_book_backend_dup_locale ()

gchar *
e_book_backend_dup_locale (EBookBackend *backend);

Fetches a copy of the currently configured locale for the addressbook

Since: 3.12

e_book_backend_create_cursor ()

EDataBookCursor *
e_book_backend_create_cursor (EBookBackend *backend,
                              EContactField *sort_fields,
                              EBookCursorSortType *sort_types,
                              guint n_fields,
                              GError **error);

Creates a new EDataBookCursor for the given backend if the backend has cursor support. If the backend does not support cursors then an E_CLIENT_ERROR_NOT_SUPPORTED error will be set in error .

Backends can also refuse to create cursors for some values of sort_fields and report more specific errors.

The returned cursor belongs to backend and should be destroyed with e_book_backend_delete_cursor() when no longer needed.

Since: 3.12

e_book_backend_delete_cursor ()

gboolean
e_book_backend_delete_cursor (EBookBackend *backend,
                              EDataBookCursor *cursor,
                              GError **error);

Requests backend to release and destroy cursor , this will trigger an E_CLIENT_ERROR_INVALID_ARG error if cursor is not owned by backend .

Since: 3.12

e_book_backend_prepare_for_completion ()

GSimpleAsyncResult *
e_book_backend_prepare_for_completion (EBookBackend *backend,
                                       guint32 opid,
                                       GQueue **result_queue);

Obtains the GSimpleAsyncResult for opid and sets result_queue as a place to deposit results prior to completing the GSimpleAsyncResult.

Since: 3.10

CLIENT_BACKEND_PROPERTY_CAPABILITIES

#define             CLIENT_BACKEND_PROPERTY_CAPABILITIES

FIXME: Document me.

Since: 3.2

BOOK_BACKEND_PROPERTY_REQUIRED_FIELDS

#define             BOOK_BACKEND_PROPERTY_REQUIRED_FIELDS

FIXME: Document me.

Since: 3.2

BOOK_BACKEND_PROPERTY_SUPPORTED_FIELDS

#define             BOOK_BACKEND_PROPERTY_SUPPORTED_FIELDS

FIXME: Document me.

Since: 3.2

BOOK_BACKEND_PROPERTY_REVISION

#define BOOK_BACKEND_PROPERTY_REVISION			"revision"

The current overall revision string, this can be used as a quick check to see if data has changed at all since the last time the addressbook revision was observed.

Since: 3.4

struct EBookBackend

struct EBookBackend;

Contains only private data that should be read and manipulated using the functions below.

struct EBookBackendClass

struct EBookBackendClass {
	/* Set this to TRUE to use a serial dispatch queue, instead
	 * of a concurrent dispatch queue.  A serial dispatch queue
	 * executes one method at a time in the order in which they
	 * were called.  This is generally slower than a concurrent
	 * dispatch queue, but helps avoid thread-safety issues. */
	gboolean use_serial_dispatch_queue;

	gchar *		(*get_backend_property) (EBookBackend *backend,
						 const gchar *prop_name);

	gboolean (*open_sync)		(EBookBackend *backend,
						 GCancellable *cancellable,
						 GError **error);
	gboolean (*refresh_sync)		(EBookBackend *backend,
						 GCancellable *cancellable,
						 GError **error);
	gboolean (*create_contacts_sync) (EBookBackend *backend,
						 const gchar * const *vcards,
						 GQueue *out_contacts,
						 GCancellable *cancellable,
						 GError **error);
	gboolean (*modify_contacts_sync) (EBookBackend *backend,
						 const gchar * const *vcards,
						 GQueue *out_contacts,
						 GCancellable *cancellable,
						 GError **error);
	gboolean (*remove_contacts_sync) (EBookBackend *backend,
						 const gchar * const *uids,
						 GCancellable *cancellable,
						 GError **error);
	EContact * (*get_contact_sync) (EBookBackend *backend,
						 const gchar *uid,
						 GCancellable *cancellable,
						 GError **error);
	gboolean (*get_contact_list_sync)
						(EBookBackend *backend,
						 const gchar *query,
						 GQueue *out_contacts,
						 GCancellable *cancellable,
						 GError **error);

	/* This method is optional.  By default, it simply calls
	 * get_contact_list_sync() and extracts UID strings from
	 * the matched EContacts.  Backends may override this if
	 * they can implement it more efficiently. */
	gboolean (*get_contact_list_uids_sync)
						(EBookBackend *backend,
						 const gchar *query,
						 GQueue *out_uids,
						 GCancellable *cancellable,
						 GError **error);

	/* These methods are deprecated and will be removed once all
	 * known subclasses are converted to the new methods above. */
	void		(*open)			(EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable,
						 gboolean only_if_exists);
	void		(*refresh)		(EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable);
	void		(*create_contacts) (EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable,
						 const GSList *vcards);
	void		(*remove_contacts) (EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable,
						 const GSList *id_list);
	void		(*modify_contacts) (EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable,
						 const GSList *vcards);
	void		(*get_contact)		(EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable,
						 const gchar *id);
	void		(*get_contact_list) (EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable,
						 const gchar *query);
	void		(*get_contact_list_uids)
						(EBookBackend *backend,
						 EDataBook *book,
						 guint32 opid,
						 GCancellable *cancellable,
						 const gchar *query);

	void		(*start_view)		(EBookBackend *backend,
						 EDataBookView *book_view);
	void		(*stop_view)		(EBookBackend *backend,
						 EDataBookView *book_view);

	void		(*notify_update) (EBookBackend *backend,
						 const EContact *contact);

	EDataBookDirect *
			(*get_direct_book) (EBookBackend *backend);
	void		(*configure_direct) (EBookBackend *backend,
						 const gchar *config);

	void		(*sync)			(EBookBackend *backend);

	gboolean (*set_locale)		(EBookBackend *backend,
						 const gchar *locale,
						 GCancellable *cancellable,
						 GError **error);
	gchar *		(*dup_locale)		(EBookBackend *backend);
	EDataBookCursor *
			(*create_cursor) (EBookBackend *backend,
						 EContactField *sort_fields,
						 EBookCursorSortType *sort_types,
						 guint n_fields,
						 GError **error);
	gboolean (*delete_cursor) (EBookBackend *backend,
						 EDataBookCursor *cursor,
						 GError **error);

	/* Signals */
	void		(*closed)		(EBookBackend *backend,
						 const gchar *sender);
	void		(*shutdown)		(EBookBackend *backend);
};

Class structure for the EBookBackend class.

These virtual methods must be implemented when writing an addressbook backend.

The “cache-dir” property

  “cache-dir”                gchar *

The backend's cache directory.

Flags: Read / Write

Default value: NULL

The “proxy-resolver” property

  “proxy-resolver”           GProxyResolver *

The proxy resolver for this backend.

Flags: Read

The “registry” property

  “registry”                 ESourceRegistry *

Data source registry.

Flags: Read / Write / Construct Only

The “writable” property

  “writable”                 gboolean

Whether the backend will accept changes.

Flags: Read / Write

Default value: FALSE

The “closed” signal

void
user_function (EBookBackend *backend,
               gchar        *sender,
               gpointer      user_data)

Emitted when a client destroys its EBookClient for backend .

Flags: Run Last

Since: 3.10

The “shutdown” signal

void
user_function (EBookBackend *backend,
               gpointer      user_data)

Emitted when the last client destroys its EBookClient for backend . This signals the backend to begin final cleanup tasks such as synchronizing data to permanent storage.

Flags: Run Last

Since: 3.10