use crate::{
channel::Channel,
channels::Channels,
close_on_drop,
configuration::Configuration,
connection_properties::ConnectionProperties,
connection_status::{ConnectionState, ConnectionStatus, ConnectionStep},
executor::{DefaultExecutor, Executor},
frames::Frames,
internal_rpc::{InternalRPC, InternalRPCHandle},
io_loop::IoLoop,
tcp::{AMQPUriTcpExt, Identity, TcpStream},
thread::ThreadHandle,
types::ShortUInt,
uri::AMQPUri,
waker::Waker,
CloseOnDropPromise, Error, Promise, Result,
};
use amq_protocol::frame::AMQPFrame;
use log::{log_enabled, Level::Trace};
use mio::{Poll, Token};
use std::{fmt, sync::Arc};
pub struct Connection {
configuration: Configuration,
status: ConnectionStatus,
channels: Channels,
io_loop: ThreadHandle,
}
impl Connection {
fn new(
waker: Waker,
internal_rpc: InternalRPCHandle,
frames: Frames,
executor: Arc<dyn Executor>,
) -> Self {
let configuration = Configuration::default();
let status = ConnectionStatus::default();
let channels = Channels::new(
configuration.clone(),
status.clone(),
waker,
internal_rpc,
frames,
executor,
);
let connection = Self {
configuration,
status,
channels,
io_loop: ThreadHandle::default(),
};
connection.channels.create_zero();
connection
}
pub fn connect(uri: &str, options: ConnectionProperties) -> CloseOnDropPromise<Connection> {
Connect::connect(uri, options, None)
}
pub fn connect_with_identity(
uri: &str,
options: ConnectionProperties,
identity: Identity<'_, '_>,
) -> CloseOnDropPromise<Connection> {
Connect::connect(uri, options, Some(identity))
}
pub fn connect_uri(
uri: AMQPUri,
options: ConnectionProperties,
) -> CloseOnDropPromise<Connection> {
Connect::connect(uri, options, None)
}
pub fn connect_uri_with_identity(
uri: AMQPUri,
options: ConnectionProperties,
identity: Identity<'_, '_>,
) -> CloseOnDropPromise<Connection> {
Connect::connect(uri, options, Some(identity))
}
pub fn create_channel(&self) -> CloseOnDropPromise<Channel> {
if !self.status.connected() {
return CloseOnDropPromise::new_with_data(Err(Error::InvalidConnectionState(
self.status.state(),
)));
}
match self.channels.create() {
Ok(channel) => channel.channel_open(),
Err(error) => CloseOnDropPromise::new_with_data(Err(error)),
}
}
pub fn run(&self) -> Result<()> {
self.io_loop.wait("io loop")
}
pub fn on_error<E: FnMut(Error) + Send + 'static>(&self, handler: E) {
self.channels.set_error_handler(handler);
}
pub fn configuration(&self) -> &Configuration {
&self.configuration
}
pub fn status(&self) -> &ConnectionStatus {
&self.status
}
fn channel0(&self) -> Channel {
self.channels.get(0).expect("channel 0")
}
pub fn close(&self, reply_code: ShortUInt, reply_text: &str) -> Promise<()> {
if let Some(channel0) = self.channels.get(0) {
channel0.connection_close(reply_code, reply_text, 0, 0)
} else {
Promise::new_with_data(Ok(()))
}
}
pub fn block(&self, reason: &str) -> Promise<()> {
if let Some(channel0) = self.channels.get(0) {
channel0.connection_blocked(reason)
} else {
Promise::new_with_data(Err(Error::InvalidConnectionState(self.status.state())))
}
}
pub fn unblock(&self) -> Promise<()> {
if let Some(channel0) = self.channels.get(0) {
channel0.connection_unblocked()
} else {
Promise::new_with_data(Err(Error::InvalidConnectionState(self.status.state())))
}
}
pub fn update_secret(&self, new_secret: &str, reason: &str) -> Promise<()> {
if let Some(channel0) = self.channels.get(0) {
channel0.connection_update_secret(new_secret, reason)
} else {
Promise::new_with_data(Err(Error::InvalidConnectionState(self.status.state())))
}
}
pub fn connector(
mut options: ConnectionProperties,
) -> impl FnOnce(
TcpStream,
AMQPUri,
Option<(Poll, Token)>,
) -> Result<CloseOnDropPromise<Connection>>
+ 'static {
move |stream, uri, poll| {
let executor = options
.executor
.take()
.unwrap_or_else(|| Arc::new(DefaultExecutor::default()));
let waker = Waker::default();
let internal_rpc = InternalRPC::new(executor.clone(), waker.clone());
let frames = Frames::default();
let conn = Connection::new(
waker.clone(),
internal_rpc.handle(),
frames.clone(),
executor,
);
let status = conn.status.clone();
let configuration = conn.configuration.clone();
status.set_vhost(&uri.vhost);
status.set_username(&uri.authority.userinfo.username);
if let Some(frame_max) = uri.query.frame_max {
configuration.set_frame_max(frame_max);
}
if let Some(channel_max) = uri.query.channel_max {
configuration.set_channel_max(channel_max);
}
if let Some(heartbeat) = uri.query.heartbeat {
configuration.set_heartbeat(heartbeat);
}
let (promise, resolver) = Promise::new();
if log_enabled!(Trace) {
promise.set_marker("ProtocolHeader".into());
}
if let Err(err) =
conn.channel0()
.send_frame(AMQPFrame::ProtocolHeader, resolver.clone(), None)
{
resolver.swear(Err(err));
}
let (promise, resolver) = CloseOnDropPromise::after(promise);
if log_enabled!(Trace) {
promise.set_marker("ProtocolHeader.Ok".into());
}
let channels = conn.channels.clone();
let io_loop_handle = conn.io_loop.clone();
status.set_state(ConnectionState::Connecting);
status.set_connection_step(ConnectionStep::ProtocolHeader(
resolver,
conn,
uri.authority.userinfo.into(),
uri.query.auth_mechanism.unwrap_or_default(),
options,
));
IoLoop::new(
status,
configuration,
channels,
internal_rpc,
frames,
io_loop_handle,
waker,
stream,
poll,
)?
.start()?;
Ok(promise)
}
}
}
impl fmt::Debug for Connection {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Connection")
.field("configuration", &self.configuration)
.field("status", &self.status)
.field("channels", &self.channels)
.finish()
}
}
pub trait Connect {
fn connect(
self,
options: ConnectionProperties,
identity: Option<Identity<'_, '_>>,
) -> CloseOnDropPromise<Connection>
where
Self: Sized,
{
Poll::new()
.map_err(Error::from)
.and_then(|poll| self.connect_raw(options, Some(poll), identity))
.unwrap_or_else(|err| CloseOnDropPromise::new_with_data(Err(err)))
}
fn connect_raw(
self,
options: ConnectionProperties,
poll: Option<Poll>,
identity: Option<Identity<'_, '_>>,
) -> Result<CloseOnDropPromise<Connection>>;
}
impl Connect for AMQPUri {
fn connect_raw(
self,
options: ConnectionProperties,
poll: Option<Poll>,
identity: Option<Identity<'_, '_>>,
) -> Result<CloseOnDropPromise<Connection>> {
AMQPUriTcpExt::connect_full(
self,
Connection::connector(options),
poll.map(|poll| (poll, crate::io_loop::SOCKET)),
identity,
)?
}
}
impl Connect for &str {
fn connect_raw(
self,
options: ConnectionProperties,
poll: Option<Poll>,
identity: Option<Identity<'_, '_>>,
) -> Result<CloseOnDropPromise<Connection>> {
AMQPUriTcpExt::connect_full(
self,
Connection::connector(options),
poll.map(|poll| (poll, crate::io_loop::SOCKET)),
identity,
)?
}
}
#[cfg(test)]
mod tests {
use env_logger;
use super::*;
use crate::channel_status::ChannelState;
use crate::types::ShortString;
use crate::BasicProperties;
use amq_protocol::frame::AMQPContentHeader;
use amq_protocol::protocol::{basic, AMQPClass};
#[test]
fn basic_consume_small_payload() {
let _ = env_logger::try_init();
use crate::consumer::Consumer;
use crate::queue::{Queue, QueueState};
let waker = Waker::default();
let executor = Arc::new(DefaultExecutor::default());
let conn = Connection::new(
waker.clone(),
InternalRPC::new(executor.clone(), waker).handle(),
Frames::default(),
executor.clone(),
);
conn.status.set_state(ConnectionState::Connected);
conn.configuration.set_channel_max(2047);
let channel = conn.channels.create().unwrap();
channel.set_state(ChannelState::Connected);
let queue_name = ShortString::from("consumed");
let mut queue: QueueState = Queue::new(queue_name.clone(), 0, 0).into();
let consumer_tag = ShortString::from("consumer-tag");
let consumer = Consumer::new(consumer_tag.clone(), executor);
queue.register_consumer(consumer_tag.clone(), consumer);
if let Some(c) = conn.channels.get(channel.id()) {
c.register_queue(queue);
}
{
let deliver_frame = AMQPFrame::Method(
channel.id(),
AMQPClass::Basic(basic::AMQPMethod::Deliver(basic::Deliver {
consumer_tag: consumer_tag.clone(),
delivery_tag: 1,
redelivered: false,
exchange: "".into(),
routing_key: queue_name.clone(),
})),
);
conn.channels.handle_frame(deliver_frame).unwrap();
let channel_state = channel.status().state();
let expected_state = ChannelState::WillReceiveContent(
Some(queue_name.clone()),
Some(consumer_tag.clone()),
);
assert_eq!(channel_state, expected_state);
}
{
let header_frame = AMQPFrame::Header(
channel.id(),
60,
Box::new(AMQPContentHeader {
class_id: 60,
weight: 0,
body_size: 2,
properties: BasicProperties::default(),
}),
);
conn.channels.handle_frame(header_frame).unwrap();
let channel_state = channel.status().state();
let expected_state = ChannelState::ReceivingContent(
Some(queue_name.clone()),
Some(consumer_tag.clone()),
2,
);
assert_eq!(channel_state, expected_state);
}
{
let body_frame = AMQPFrame::Body(channel.id(), "{}".as_bytes().to_vec());
conn.channels.handle_frame(body_frame).unwrap();
let channel_state = channel.status().state();
let expected_state = ChannelState::Connected;
assert_eq!(channel_state, expected_state);
}
}
#[test]
fn basic_consume_empty_payload() {
let _ = env_logger::try_init();
use crate::consumer::Consumer;
use crate::queue::{Queue, QueueState};
let waker = Waker::default();
let executor = Arc::new(DefaultExecutor::default());
let conn = Connection::new(
waker.clone(),
InternalRPC::new(executor.clone(), waker).handle(),
Frames::default(),
executor.clone(),
);
conn.status.set_state(ConnectionState::Connected);
conn.configuration.set_channel_max(2047);
let channel = conn.channels.create().unwrap();
channel.set_state(ChannelState::Connected);
let queue_name = ShortString::from("consumed");
let mut queue: QueueState = Queue::new(queue_name.clone(), 0, 0).into();
let consumer_tag = ShortString::from("consumer-tag");
let consumer = Consumer::new(consumer_tag.clone(), executor);
queue.register_consumer(consumer_tag.clone(), consumer);
conn.channels.get(channel.id()).map(|c| {
c.register_queue(queue);
});
{
let deliver_frame = AMQPFrame::Method(
channel.id(),
AMQPClass::Basic(basic::AMQPMethod::Deliver(basic::Deliver {
consumer_tag: consumer_tag.clone(),
delivery_tag: 1,
redelivered: false,
exchange: "".into(),
routing_key: queue_name.clone(),
})),
);
conn.channels.handle_frame(deliver_frame).unwrap();
let channel_state = channel.status().state();
let expected_state = ChannelState::WillReceiveContent(
Some(queue_name.clone()),
Some(consumer_tag.clone()),
);
assert_eq!(channel_state, expected_state);
}
{
let header_frame = AMQPFrame::Header(
channel.id(),
60,
Box::new(AMQPContentHeader {
class_id: 60,
weight: 0,
body_size: 0,
properties: BasicProperties::default(),
}),
);
conn.channels.handle_frame(header_frame).unwrap();
let channel_state = channel.status().state();
let expected_state = ChannelState::Connected;
assert_eq!(channel_state, expected_state);
}
}
}
impl close_on_drop::__private::Closable for Connection {
fn close(&self, reply_code: ShortUInt, reply_text: &str) -> Promise<()> {
if self.status().connected() {
Connection::close(self, reply_code, reply_text)
} else {
Promise::new_with_data(Ok(()))
}
}
}