Struct zbus::azync::Proxy [−][src]
pub struct Proxy<'a> { /* fields omitted */ }
Expand description
The asynchronous sibling of crate::Proxy
.
This API is mostly the same as crate::Proxy
, except it is asynchronous. One of the
implications of asynchronous API is that apart from the signal handling through connecting and
disconnecting handlers (using Proxy::connect_signal
and Proxy::disconnect_signal
methods),
you can also receive signals through a stream using Proxy::receive_signal
method.
Another implication of asynchronous API is that we do not need crate::SignalReceiver
here.
The futures
crate provides API to combine futures and streams already.
Example
use std::result::Result; use std::error::Error; use async_io::block_on; use zbus::azync::{Connection, Proxy}; fn main() -> Result<(), Box<dyn Error>> { block_on(run()) } async fn run() -> Result<(), Box<dyn Error>> { let connection = Connection::new_session().await?; let p = Proxy::new( &connection, "org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus", ).await?; // owned return value let _id: String = p.call("GetId", &()).await?; // borrowed return value let _id: &str = p.call_method("GetId", &()).await?.body()?; Ok(()) }
Note
It is recommended to use the dbus_proxy
macro, which provides a more convenient and
type-safe façade Proxy
derived from a Rust trait.
Current limitations:
At the moment, Proxy
doesn’t:
- cache properties
- track the current name owner
- prevent auto-launching
Implementations
Create a new Proxy
for the given destination/path/interface.
Create a new Proxy
for the given destination/path/interface, taking ownership of all
passed arguments.
Get a reference to the associated connection.
Get a reference to the destination service name.
Get a reference to the object path.
Introspect the associated object, and return the XML description.
See the xml module for parsing the result.
pub async fn get_property<T>(&self, property_name: &str) -> Result<T> where
T: TryFrom<OwnedValue>,
[src]
pub async fn get_property<T>(&self, property_name: &str) -> Result<T> where
T: TryFrom<OwnedValue>,
[src]Get the property property_name
.
Effectively, call the Get
method of the org.freedesktop.DBus.Properties
interface.
Set the property property_name
.
Effectively, call the Set
method of the org.freedesktop.DBus.Properties
interface.
Call a method and return the reply.
Typically, you would want to use call
method instead. Use this method if you need to
deserialize the reply message manually (this way, you can avoid the memory
allocation/copying, by deserializing the reply to an unowned type).
Call a method and return the reply body.
Use call_method
instead if you need to deserialize the reply manually/separately.
Create a stream for signal named signal_name
.
Errors
Apart from general I/O errors that can result from socket communications, calling this method will also result in an error if the destination service has not yet registered its well-known name with the bus (assuming you’re using the well-known name as destination).
Register a handler for signal named signal_name
.
Once a handler is successfully registered, call Self::next_signal
to wait for the next
signal to arrive and be handled by its registered handler. A unique ID for the handler is
returned, which can be used to deregister this handler using Self::disconnect_signal
method.
Errors
This method can fail if addition of the relevant match rule on the bus fails. You can
safely unwrap
the Result
if you’re certain that associated connection is not a bus
connection.
Deregister the signal handler with the ID handler_id
.
This method returns Ok(true)
if a handler with the id handler_id
is found and removed;
Ok(false)
otherwise.
Errors
This method can fail if removal of the relevant match rule on the bus fails. You can
safely unwrap
the Result
if you’re certain that associated connection is not a bus
connection.
Receive and handle the next incoming signal on the associated connection.
This method will wait for signal messages on the associated connection and call any
handlers registered through the Self::connect_signal
method.
If the signal message was handled by a handler, Ok(None)
is returned. Otherwise, the
received message is returned.
Errors
This method returns the same errors as Self::receive_signal
.
Handle the provided signal message.
Call any handlers registered through the Self::connect_signal
method for the provided
signal message.
If no errors are encountered, Ok(true)
is returned if any handlers where found and called for,
the signal; Ok(false)
otherwise.
Trait Implementations
Auto Trait Implementations
impl<'a> !RefUnwindSafe for Proxy<'a>
impl<'a> !UnwindSafe for Proxy<'a>