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use std::{
net::{SocketAddr, SocketAddrV4, TcpListener, TcpStream},
sync::{Arc, Mutex},
thread::spawn,
};
use anyhow::{Result, bail};
use serde::{Deserialize, Serialize};
use tungstenite::{Message, accept};
use crate::{
store::SpanId,
store_container::StoreContainer,
timestamp::Timestamp,
u64_string,
viewer::{Update, ViewLineUpdate, ViewMode, Viewer},
};
#[derive(Serialize, Deserialize, Debug)]
#[serde(tag = "type")]
#[serde(rename_all = "kebab-case")]
pub enum ServerToClientMessage {
ViewLine {
#[serde(flatten)]
update: ViewLineUpdate,
},
ViewLinesCount {
count: usize,
max: u64,
},
#[serde(rename_all = "camelCase")]
QueryResult {
#[serde(with = "u64_string")]
id: SpanId,
is_graph: bool,
start: Timestamp,
end: Timestamp,
duration: Timestamp,
cpu: Timestamp,
allocations: u64,
deallocations: u64,
allocation_count: u64,
persistent_allocations: u64,
args: Vec<(String, String)>,
path: Vec<String>,
},
}
#[derive(Serialize, Deserialize, Debug)]
#[serde(tag = "type")]
#[serde(rename_all = "kebab-case")]
pub enum ClientToServerMessage {
#[serde(rename_all = "camelCase")]
ViewRect {
view_rect: ViewRect,
},
ViewMode {
#[serde(with = "u64_string")]
id: SpanId,
mode: String,
inherit: bool,
},
ResetViewMode {
#[serde(with = "u64_string")]
id: SpanId,
},
Query {
#[serde(with = "u64_string")]
id: SpanId,
},
Ack,
CheckForMoreData,
}
#[derive(Serialize, Deserialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct SpanViewEvent {
pub start: Timestamp,
pub duration: Timestamp,
pub name: String,
pub id: Option<SpanId>,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct Filter {
pub op: Op,
pub value: u64,
}
#[derive(Serialize, Deserialize, Debug)]
#[serde(rename_all = "snake_case")]
pub enum Op {
Gt,
Lt,
}
#[derive(Serialize, Deserialize, Debug)]
#[serde(rename_all = "camelCase")]
pub struct ViewRect {
pub x: u64,
pub y: u64,
pub width: u64,
pub height: u64,
pub horizontal_pixels: u64,
pub query: String,
pub view_mode: String,
pub value_mode: String,
pub value_filter: Option<Filter>,
pub count_filter: Option<Filter>,
}
struct ConnectionState {
store: Arc<StoreContainer>,
viewer: Viewer,
view_rect: ViewRect,
last_update_generation: usize,
}
pub fn serve(store: Arc<StoreContainer>, port: u16) {
let server = TcpListener::bind(SocketAddr::V4(SocketAddrV4::new(
std::net::Ipv4Addr::new(127, 0, 0, 1),
port,
)))
.unwrap();
for stream in server.incoming() {
let store = store.clone();
spawn(move || {
let websocket = accept(stream.unwrap()).unwrap();
if let Err(err) = handle_connection(websocket, store) {
eprintln!("Error: {err:?}");
}
});
}
}
fn handle_connection(
mut websocket: tungstenite::WebSocket<TcpStream>,
store: Arc<StoreContainer>,
) -> Result<()> {
let state = Arc::new(Mutex::new(ConnectionState {
store,
viewer: Viewer::new(),
view_rect: ViewRect {
x: 0,
y: 0,
width: 1,
height: 1,
horizontal_pixels: 1,
query: String::new(),
view_mode: "aggregated".to_string(),
value_mode: "duration".to_string(),
count_filter: None,
value_filter: None,
},
last_update_generation: 0,
}));
let mut update_skipped = false;
let mut ready_for_update = true;
fn send_update(
websocket: &mut tungstenite::WebSocket<TcpStream>,
state: &mut ConnectionState,
force_send: bool,
ready_for_update: &mut bool,
update_skipped: &mut bool,
) -> Result<()> {
if !*ready_for_update {
if force_send {
*update_skipped = true;
}
return Ok(());
}
let store = state.store.read();
if !force_send && state.last_update_generation == store.generation() {
return Ok(());
}
state.last_update_generation = store.generation();
let Update {
lines: updates,
max,
} = state.viewer.compute_update(&store, &state.view_rect);
let count = updates.len();
for update in updates {
let message = ServerToClientMessage::ViewLine { update };
let message = serde_json::to_string(&message).unwrap();
websocket.send(Message::Text(message))?;
}
let message = ServerToClientMessage::ViewLinesCount { count, max };
let message = serde_json::to_string(&message).unwrap();
websocket.send(Message::Text(message))?;
*ready_for_update = false;
Ok(())
}
loop {
match websocket.read()? {
Message::Frame(_frame) => {}
Message::Text(text) => {
let message: ClientToServerMessage = serde_json::from_str(&text)?;
let mut state = state.lock().unwrap();
match message {
ClientToServerMessage::CheckForMoreData => {
send_update(
&mut websocket,
&mut state,
false,
&mut ready_for_update,
&mut update_skipped,
)?;
}
ClientToServerMessage::ViewRect { view_rect } => {
state.view_rect = view_rect;
send_update(
&mut websocket,
&mut state,
true,
&mut ready_for_update,
&mut update_skipped,
)?;
}
ClientToServerMessage::ViewMode { id, mode, inherit } => {
let (mode, sorted) = if let Some(mode) = mode.strip_suffix("-sorted") {
(mode, true)
} else {
(mode.as_str(), false)
};
match mode {
"raw-spans" => {
state.viewer.set_view_mode(
id,
Some((ViewMode::RawSpans { sorted }, inherit)),
);
}
"aggregated" => {
state.viewer.set_view_mode(
id,
Some((ViewMode::Aggregated { sorted }, inherit)),
);
}
"bottom-up" => {
state.viewer.set_view_mode(
id,
Some((ViewMode::BottomUp { sorted }, inherit)),
);
}
"aggregated-bottom-up" => {
state.viewer.set_view_mode(
id,
Some((ViewMode::AggregatedBottomUp { sorted }, inherit)),
);
}
_ => {
bail!("unknown view mode: {}", mode)
}
}
send_update(
&mut websocket,
&mut state,
true,
&mut ready_for_update,
&mut update_skipped,
)?;
}
ClientToServerMessage::ResetViewMode { id } => {
state.viewer.set_view_mode(id, None);
send_update(
&mut websocket,
&mut state,
true,
&mut ready_for_update,
&mut update_skipped,
)?;
}
ClientToServerMessage::Query { id } => {
let message = {
let store = state.store.read();
if let Some((span, is_graph)) = store.span(id) {
let root_start = store.root_span().start();
let span_start = span.start() - root_start;
let span_end = span.end() - root_start;
let duration = span.corrected_total_time();
let cpu = span.total_time();
let allocations = span.total_allocations();
let deallocations = span.total_deallocations();
let allocation_count = span.total_allocation_count();
let persistent_allocations = span.total_persistent_allocations();
let args = span
.args()
.map(|(k, v)| (k.to_string(), v.to_string()))
.collect();
let mut path = Vec::new();
let mut current = span;
while let Some(parent) = current.parent() {
path.push(parent.nice_name().1.to_string());
current = parent;
}
path.reverse();
ServerToClientMessage::QueryResult {
id,
is_graph,
start: span_start,
end: span_end,
duration,
cpu,
allocations,
deallocations,
allocation_count,
persistent_allocations,
args,
path,
}
} else {
ServerToClientMessage::QueryResult {
id,
is_graph: false,
start: Timestamp::ZERO,
end: Timestamp::ZERO,
duration: Timestamp::ZERO,
cpu: Timestamp::ZERO,
allocations: 0,
deallocations: 0,
allocation_count: 0,
persistent_allocations: 0,
args: Vec::new(),
path: Vec::new(),
}
}
};
let message = serde_json::to_string(&message).unwrap();
websocket.send(Message::Text(message))?;
send_update(
&mut websocket,
&mut state,
true,
&mut ready_for_update,
&mut update_skipped,
)?;
continue;
}
ClientToServerMessage::Ack => {
ready_for_update = true;
if update_skipped {
update_skipped = false;
send_update(
&mut websocket,
&mut state,
true,
&mut ready_for_update,
&mut update_skipped,
)?;
}
}
}
}
Message::Binary(_) => {
// This doesn't happen
}
Message::Close(_) => {
return Ok(());
}
Message::Ping(d) => {
websocket.send(Message::Pong(d))?;
}
Message::Pong(_) => {
// thanks for the fish
}
}
}
}
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