Method init_callback_channel

rust/src/api/mod.rs:1043–1066

Initializes a callback channel via a Java Instance that is a `NativeCallbackToRustChannelSupport`. It returns a Result of `InstanceReceiver` that may be used to get an underlying `Receiver `. The `NativeCallbackToRustChannelSupport` Instance which is passed as argument, will be sending `Instance`s via this Receiver.

(&self, instance: &Instance)

    /// It returns a Result of `InstanceReceiver` that may be used to get an underlying `Receiver<Instance>`.
    /// The `NativeCallbackToRustChannelSupport` Instance which is passed as argument, will be sending `Instance`s via this Receiver.
    pub fn init_callback_channel(&self, instance: &Instance) -> errors::Result<InstanceReceiver> {
        debug("Initializing callback channel");
        unsafe {
            // Create the channel
            let (sender, rx) = channel();
            let tx = Box::new(sender);
            // First argument: the address of the channel Sender
            let raw_ptr = Box::into_raw(tx);
            // Find the address of tx
            let address_string = format!("{:p}", raw_ptr);
            let address = u64::from_str_radix(&address_string[2..], 16).unwrap();

            // Call the method of the instance
            (opt_to_res(cache::get_jni_call_void_method())?)(
                self.jni_env,
                instance.jinstance,
                cache::get_init_callback_channel_method()?,
                address,
            );

            // Create and return the Instance
            Self::do_return(self.jni_env, InstanceReceiver::new(rx, address))
        }
    }

    /// Invokes the static method `method_name` of the class `class_name`, passing an array of `InvocationArg`s. It returns an `Instance` as the result of the invocation.
    pub fn invoke_static(