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383
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View file

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6
3c-fault-tolerant-broadcast/rustfmt.toml
View file

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322
3d-efficient-broadcast-part-one/Cargo.lock generated
View file

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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
dependencies = [
"cfg-if",
]
[[package]]
name = "mio"
version = "0.8.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5b9d9a46eff5b4ff64b45a9e316a6d1e0bc719ef429cbec4dc630684212bfdf9"
dependencies = [
"libc",
"log",
"wasi",
"windows-sys 0.45.0",
]
[[package]]
name = "num_cpus"
version = "1.15.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
dependencies = [
"hermit-abi",
"libc",
]
[[package]]
name = "parking_lot"
version = "0.12.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
dependencies = [
"lock_api",
"parking_lot_core",
]
[[package]]
name = "parking_lot_core"
version = "0.9.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9069cbb9f99e3a5083476ccb29ceb1de18b9118cafa53e90c9551235de2b9521"
dependencies = [
"cfg-if",
"libc",
"redox_syscall",
"smallvec",
"windows-sys 0.45.0",
]
[[package]]
name = "pin-project-lite"
version = "0.2.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
[[package]]
name = "ppv-lite86"
version = "0.2.17"
@ -192,27 +94,12 @@ dependencies = [
"getrandom",
]
[[package]]
name = "redox_syscall"
version = "0.2.16"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
dependencies = [
"bitflags",
]
[[package]]
name = "ryu"
version = "1.0.13"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f91339c0467de62360649f8d3e185ca8de4224ff281f66000de5eb2a77a79041"
[[package]]
name = "scopeguard"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
[[package]]
name = "serde"
version = "1.0.160"
@ -244,31 +131,6 @@ dependencies = [
"serde",
]
[[package]]
name = "signal-hook-registry"
version = "1.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
dependencies = [
"libc",
]
[[package]]
name = "smallvec"
version = "1.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"
[[package]]
name = "socket2"
version = "0.4.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "64a4a911eed85daf18834cfaa86a79b7d266ff93ff5ba14005426219480ed662"
dependencies = [
"libc",
"winapi",
]
[[package]]
name = "syn"
version = "2.0.15"
@ -280,36 +142,6 @@ dependencies = [
"unicode-ident",
]
[[package]]
name = "tokio"
version = "1.28.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0aa32867d44e6f2ce3385e89dceb990188b8bb0fb25b0cf576647a6f98ac5105"
dependencies = [
"autocfg",
"bytes",
"libc",
"mio",
"num_cpus",
"parking_lot",
"pin-project-lite",
"signal-hook-registry",
"socket2",
"tokio-macros",
"windows-sys 0.48.0",
]
[[package]]
name = "tokio-macros"
version = "2.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "630bdcf245f78637c13ec01ffae6187cca34625e8c63150d424b59e55af2675e"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "unicode-ident"
version = "1.0.8"
@ -321,157 +153,3 @@ name = "wasi"
version = "0.11.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
[[package]]
name = "winapi"
version = "0.3.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
dependencies = [
"winapi-i686-pc-windows-gnu",
"winapi-x86_64-pc-windows-gnu",
]
[[package]]
name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
[[package]]
name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
[[package]]
name = "windows-sys"
version = "0.45.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
dependencies = [
"windows-targets 0.42.2",
]
[[package]]
name = "windows-sys"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
dependencies = [
"windows-targets 0.48.0",
]
[[package]]
name = "windows-targets"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
dependencies = [
"windows_aarch64_gnullvm 0.42.2",
"windows_aarch64_msvc 0.42.2",
"windows_i686_gnu 0.42.2",
"windows_i686_msvc 0.42.2",
"windows_x86_64_gnu 0.42.2",
"windows_x86_64_gnullvm 0.42.2",
"windows_x86_64_msvc 0.42.2",
]
[[package]]
name = "windows-targets"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
dependencies = [
"windows_aarch64_gnullvm 0.48.0",
"windows_aarch64_msvc 0.48.0",
"windows_i686_gnu 0.48.0",
"windows_i686_msvc 0.48.0",
"windows_x86_64_gnu 0.48.0",
"windows_x86_64_gnullvm 0.48.0",
"windows_x86_64_msvc 0.48.0",
]
[[package]]
name = "windows_aarch64_gnullvm"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
[[package]]
name = "windows_aarch64_gnullvm"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
[[package]]
name = "windows_aarch64_msvc"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
[[package]]
name = "windows_aarch64_msvc"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
[[package]]
name = "windows_i686_gnu"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
[[package]]
name = "windows_i686_gnu"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
[[package]]
name = "windows_i686_msvc"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
[[package]]
name = "windows_i686_msvc"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
name = "windows_x86_64_gnu"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
[[package]]
name = "windows_x86_64_gnu"
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[[package]]
name = "windows_x86_64_gnullvm"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
name = "windows_x86_64_gnullvm"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
name = "windows_x86_64_msvc"
version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
name = "windows_x86_64_msvc"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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1
3d-efficient-broadcast-part-one/Cargo.toml
View file

@ -9,4 +9,3 @@ edition = "2021"
rand = "0.8.5"
serde = {version = "1", features = ["derive"] }
serde_json = "1"
tokio = { version = "1.28.1", features = ["full"] }

241
3d-efficient-broadcast-part-one/src/main.rs
View file

@ -4,180 +4,125 @@ mod storage;
use crate::message::{Body, Message};
use crate::node::Node;
use crate::storage::Storage;
use rand::prelude::*;
use rand::rngs::StdRng;
use std::io::Write;
use std::sync::Arc;
use std::time::Duration;
use std::{println, thread};
use tokio::io::AsyncBufReadExt;
use tokio::io::BufReader;
use tokio::sync::{
use std::io::prelude::*;
use std::io::{BufReader, Write};
use std::sync::{
mpsc,
mpsc::{Receiver, Sender},
Mutex,
Arc, Mutex,
};
use std::time::Duration;
use std::{println, thread};
const GOSSIP_DELAY: u64 = 150;
const MIN_AMOUNT_NODES: usize = 4;
const NETWORK_SIZE: usize = 25;
fn main() {
let (reader_tx, mut reader_rx) = mpsc::channel();
let (writer_tx, mut writer_rx) = mpsc::channel();
#[tokio::main]
async fn main() {
let (reader_tx, mut reader_rx) = mpsc::channel(1000);
let (writer_tx, mut writer_rx) = mpsc::channel(1000);
let node = Arc::new(Mutex::new(Node::default()));
let n1 = node.clone();
let n2 = node.clone();
let reader_tx1: Sender<Message> = reader_tx.clone();
let writer_tx1: Sender<Message> = writer_tx.clone();
let writer_tx2: Sender<Message> = writer_tx.clone();
let node = Node::default();
let store = Arc::new(Mutex::new(Storage::default()));
let node = init_node(node).await;
let n1 = node.clone();
let s1 = store.clone();
let read = tokio::spawn(async move {
read_from_stdin(reader_tx1).await;
let read = thread::spawn(move || {
read_from_stdin(reader_tx1);
});
let write = tokio::spawn(async move {
write_to_stdout(&mut writer_rx).await;
let write = thread::spawn(move || {
write_to_stdout(&mut writer_rx);
});
let gossip = tokio::spawn(async move {
loop {
thread::sleep(Duration::from_millis(GOSSIP_DELAY));
gossip_messages(n1.clone(), s1.clone(), writer_tx2.clone()).await;
}
let gossip = thread::spawn(move || loop {
thread::sleep(Duration::from_millis(100));
gossip_messages(n1.clone(), writer_tx2.clone());
});
let handle = tokio::spawn(async move {
handle_messages(node.clone(), store.clone(), &mut reader_rx, writer_tx1).await;
let handle = thread::spawn(move || {
handle_messages(n2, &mut reader_rx, writer_tx1);
});
let _ = tokio::try_join!(read, handle, write, gossip);
let _ = handle.join();
let _ = write.join();
let _ = gossip.join();
let _ = read.join();
}
async fn init_node(node: Node) -> Node {
let stdin = tokio::io::stdin();
let mut stdout = std::io::stdout();
let mut reader = BufReader::new(stdin);
let mut buf = String::new();
reader.read_line(&mut buf).await.unwrap();
let message = Message::parse_message(buf.clone());
let node = node.init(message.clone());
match message.body {
Body::Init {
msg_id, node_id, ..
} => {
let response = Message {
src: node_id,
dest: message.src.clone(),
body: Body::InitOk {
in_reply_to: msg_id,
},
};
let message = Message::format_message(response);
writeln!(stdout, "{}", message).unwrap();
stdout.flush().unwrap();
}
_ => (),
}
node
}
async fn read_from_stdin(reader_tx: Sender<Message>) {
let stdin = tokio::io::stdin();
let mut reader = BufReader::new(stdin);
fn read_from_stdin(reader_tx: Sender<Message>) {
let stdin = std::io::stdin();
let mut reader = BufReader::new(stdin.lock());
loop {
let mut buf = String::new();
reader.read_line(&mut buf).await.unwrap();
reader.read_line(&mut buf).unwrap();
let message = Message::parse_message(buf.clone());
reader_tx.send(message).await.unwrap();
reader_tx.send(message).unwrap();
}
}
async fn write_to_stdout(writer_rx: &mut Receiver<Message>) {
fn write_to_stdout(writer_rx: &mut Receiver<Message>) {
let mut stdout = std::io::stdout();
loop {
let message = writer_rx.recv().await.unwrap();
let message = writer_rx.recv().unwrap();
let message = Message::format_message(message);
writeln!(stdout, "{}", message).unwrap();
stdout.flush().unwrap();
}
}
async fn gossip_messages(node: Node, storage: Arc<Mutex<Storage>>, writer: Sender<Message>) {
let mut rng = StdRng::from_entropy();
fn gossip_messages(node: Arc<Mutex<Node>>, writer: Sender<Message>) {
let node = node.lock().unwrap();
for n in node.storage.get_neighbours() {
let messages = node.storage.get_messages_for_node(n.clone());
let num_to_select = rng.gen_range(MIN_AMOUNT_NODES..=NETWORK_SIZE);
if messages.len() == 0 {
continue;
}
let selected_neighbours: Vec<String> = node
.get_network()
.choose_multiple(&mut rng, num_to_select)
.cloned()
.collect();
let message = Message {
src: node.id.clone(),
dest: n.clone(),
body: Body::Gossip {
messages: messages.clone(),
},
};
let mut tasks = vec![];
for n in selected_neighbours {
let storage_clone = storage.clone();
let writer_clone = writer.clone();
let node_clone = node.clone();
let task = tokio::spawn(async move {
let messages = storage_clone
.lock()
.await
.get_new_messages_for_neighbour(n.clone());
if messages.is_empty() {
return;
}
let message = Message {
src: node_clone.id.clone(),
dest: n.clone(),
body: Body::Gossip {
messages: messages.clone(),
},
};
writer_clone.send(message).await.unwrap();
});
tasks.push(task);
}
// Wait for all the gossip tasks to complete
for task in tasks {
task.await.unwrap();
writer.send(message).unwrap();
}
}
async fn handle_messages(
node: Node,
storage: Arc<Mutex<Storage>>,
input: &mut Receiver<Message>,
writer: Sender<Message>,
) {
while let Some(input) = input.recv().await {
fn handle_messages(node: Arc<Mutex<Node>>, input: &mut Receiver<Message>, writer: Sender<Message>) {
while let Ok(input) = input.recv() {
match input.body {
Body::Init {
msg_id,
ref node_id,
ref node_ids,
..
} => {
let mut node = node.lock().unwrap();
node.init(input.clone());
node.storage.init_topology(node_id.clone(), &node_ids);
let response = Message {
src: node_id.clone(),
dest: input.src,
body: Body::InitOk {
in_reply_to: msg_id,
},
};
writer.send(response).unwrap();
}
Body::Broadcast { msg_id, message } => {
let id = node.id.clone();
storage.lock().await.add_message(message);
let id = node.lock().unwrap().get_id();
node.lock()
.unwrap()
.storage
.add_message(message, id.clone());
let response = Message {
src: id,
@ -188,14 +133,13 @@ async fn handle_messages(
},
};
writer.send(response).await.unwrap();
writer.send(response).unwrap();
}
Body::Gossip { messages } => {
let id = node.id.clone();
storage
.lock()
.await
.add_messages(messages.clone(), input.src.clone());
let id = node.lock().unwrap().get_id();
for m in messages.iter() {
node.lock().unwrap().storage.add_message(*m, id.clone());
}
let response = Message {
src: id,
@ -203,30 +147,35 @@ async fn handle_messages(
body: Body::GossipOk { messages },
};
writer.send(response).await.unwrap();
writer.send(response).unwrap();
}
Body::GossipOk { messages } => {
storage
.lock()
.await
.add_to_sent_messages(messages, input.src);
let id = node.lock().unwrap().get_id();
node.lock()
.unwrap()
.storage
.add_to_sent_messages(messages, id.clone());
}
Body::Read { msg_id } => {
let id = node.lock().unwrap().get_id();
let response = Message {
src: node.id.clone(),
src: id,
dest: input.src,
body: Body::ReadOk {
msg_id,
in_reply_to: msg_id,
messages: storage.lock().await.get_messages(),
messages: node.lock().unwrap().storage.get_messages(),
},
};
writer.send(response).await.unwrap();
writer.send(response).unwrap();
}
Body::Topology { msg_id, .. } => {
let id = node.lock().unwrap().get_id();
let response = Message {
src: node.id.clone(),
src: id,
dest: input.src,
body: Body::TopologyOk {
msg_id,
@ -234,7 +183,7 @@ async fn handle_messages(
},
};
writer.send(response).await.unwrap();
writer.send(response).unwrap();
}
Body::Error {
in_reply_to,

29
3d-efficient-broadcast-part-one/src/node.rs
View file

@ -1,40 +1,29 @@
use crate::message::{Body, Message};
use serde::{Deserialize, Serialize};
use std::collections::HashSet;
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub(crate) struct Network(pub(crate) HashSet<String>);
use crate::message::{Body, Message};
use crate::storage::Storage;
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
#[derive(Serialize, Deserialize, Debug, Default)]
pub(crate) struct Node {
pub(crate) id: String,
pub(crate) availble_nodes: Vec<String>,
pub(crate) network: Network,
pub(crate) storage: Storage,
}
impl Node {
pub(crate) fn init(&self, message: Message) -> Node {
pub(crate) fn init(&mut self, message: Message) {
match message.body {
Body::Init {
node_id, node_ids, ..
} => {
return Node {
id: node_id.clone(),
availble_nodes: node_ids.clone(),
network: self.init_network(node_ids),
}
self.id = node_id.clone();
self.availble_nodes = node_ids.clone();
}
_ => panic!("Invalid message type"),
}
}
fn init_network(&self, nodes: Vec<String>) -> Network {
let mut neighbours = Network::default();
neighbours.0.extend(nodes);
neighbours
}
pub(crate) fn get_network(&self) -> Vec<String> {
self.network.0.clone().into_iter().collect::<Vec<_>>()
pub(crate) fn get_id(&self) -> String {
self.id.clone()
}
}

85
3d-efficient-broadcast-part-one/src/storage.rs
View file

@ -1,52 +1,53 @@
use rand::seq::SliceRandom;
use rand::thread_rng;
use serde::{Deserialize, Serialize};
use std::collections::{HashMap, HashSet};
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
#[derive(Serialize, Deserialize, Debug, Default)]
pub(crate) struct Neighbours(pub(crate) HashSet<String>);
#[derive(Serialize, Deserialize, Debug, Default)]
pub(crate) struct Messages(pub(crate) HashSet<u64>);
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
#[derive(Serialize, Deserialize, Debug, Default)]
pub(crate) struct Storage {
pub(crate) messages: Messages,
pub(crate) received_gossip_messages: HashMap<String, Messages>,
pub(crate) received_messages: HashMap<String, Messages>,
pub(crate) sent_messages: HashMap<String, Messages>,
pub(crate) retry: HashMap<String, u8>,
pub(crate) neighbours: Neighbours,
}
impl Storage {
pub(crate) fn add_message(&mut self, message: u64) {
if !self.messages.0.contains(&message) {
self.messages.0.insert(message);
}
}
pub(crate) fn add_message(&mut self, message: u64, node: String) {
self.messages.0.insert(message);
pub(crate) fn add_messages(&mut self, messages: Vec<u64>, node: String) {
if self.received_gossip_messages.contains_key(&node) {
self.received_gossip_messages
if self.received_messages.contains_key(&node) {
self.received_messages
.get_mut(&node)
.unwrap()
.0
.extend(messages.iter());
.insert(message);
} else {
let mut v = Messages::default();
v.0.extend(messages.iter());
self.received_gossip_messages.insert(node, v);
}
for m in messages {
if !self.messages.0.contains(&m) {
self.messages.0.insert(m);
}
v.0.insert(message);
self.received_messages.insert(node, v);
}
}
pub(crate) fn get_messages(&mut self) -> Vec<u64> {
self.messages.0.iter().cloned().collect()
self.messages.0.clone().into_iter().collect()
}
pub(crate) fn get_new_messages_for_neighbour(&self, node: String) -> Vec<u64> {
let received_messages = self.messages.0.clone().into_iter().collect::<Vec<_>>();
pub(crate) fn get_messages_for_node(&self, node: String) -> Vec<u64> {
let received: Vec<u64> = self
.received_messages
.iter()
.filter(|(key, _)| *key == &node)
.flat_map(|(_, Messages(value))| value)
.cloned()
.collect();
let sent_to_node: Vec<u64> = self
let sent: Vec<u64> = self
.sent_messages
.iter()
.filter(|(key, _)| *key == &node)
@ -54,20 +55,12 @@ impl Storage {
.cloned()
.collect();
let received_from_node: Vec<u64> = self
.received_gossip_messages
self.messages
.0
.iter()
.filter(|(key, _)| *key == &node)
.flat_map(|(_, Messages(value))| value)
.filter(|m| !received.contains(m) && !sent.contains(m))
.cloned()
.collect();
let filtered_messages: Vec<u64> = received_messages
.into_iter()
.filter(|x| !sent_to_node.contains(x) && !received_from_node.contains(x))
.collect();
filtered_messages
.collect()
}
pub(crate) fn add_to_sent_messages(&mut self, messages: Vec<u64>, node: String) {
@ -82,4 +75,22 @@ impl Storage {
.insert(node, Messages(messages.iter().cloned().collect()));
}
}
pub(crate) fn init_topology(&mut self, node_id: String, nodes: &Vec<String>) {
let i = nodes.iter().position(|x| *x == node_id).unwrap();
let left_neighbor = nodes[(i + nodes.len() - 1) % nodes.len()].clone();
let right_neighbor = nodes[(i + 1) % nodes.len()].clone();
let mut rng = thread_rng();
let selections: Vec<String> = nodes.choose_multiple(&mut rng, 2).cloned().collect();
self.neighbours.0.extend(selections);
self.neighbours.0.insert(left_neighbor);
self.neighbours.0.insert(right_neighbor);
}
pub(crate) fn get_neighbours(&self) -> HashSet<String> {
self.neighbours.0.clone()
}
}

1
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10
3e-efficient-broadcast-part-two/Cargo.toml
View file

@ -1,10 +0,0 @@
[package]
name = "ch03e-efficient-broadcast-part-two"
version = "0.1.0"
edition = "2021"
[dependencies]
rand = "0.8.5"
serde = {version = "1", features = ["derive"] }
serde_json = "1"
tokio = { version = "1.28.1", features = ["full"] }

6
3e-efficient-broadcast-part-two/rustfmt.toml
View file

@ -1,6 +0,0 @@
hard_tabs = true
imports_granularity = "Crate"
reorder_impl_items = true
reorder_imports = true
group_imports = "StdExternalCrate"
reorder_modules = true

219
3e-efficient-broadcast-part-two/src/main.rs
View file

@ -1,219 +0,0 @@
mod message;
mod node;
mod storage;
use std::{io::Write, println, sync::Arc, thread, time::Duration};
use rand::{prelude::*, rngs::StdRng};
use tokio::{
io::{AsyncBufReadExt, BufReader},
sync::{
mpsc,
mpsc::{Receiver, Sender},
Mutex,
},
};
use crate::{
message::{Body, Message},
node::Node,
storage::Storage,
};
const GOSSIP_DELAY: u64 = 500;
const MIN_AMOUNT_NODES: usize = 1;
const NETWORK_SIZE: usize = 25;
#[tokio::main]
async fn main() {
let (reader_tx, mut reader_rx) = mpsc::channel(1000);
let (writer_tx, mut writer_rx) = mpsc::channel(1000);
let reader_tx1: Sender<Message> = reader_tx.clone();
let writer_tx1: Sender<Message> = writer_tx.clone();
let writer_tx2: Sender<Message> = writer_tx.clone();
let store = Arc::new(Mutex::new(Storage::default()));
let node = Node::bootstrap().await;
let n1 = node.clone();
let s1 = store.clone();
let read = tokio::spawn(async move {
read_from_stdin(reader_tx1).await;
});
let write = tokio::spawn(async move {
write_to_stdout(&mut writer_rx).await;
});
let gossip = tokio::spawn(async move {
loop {
thread::sleep(Duration::from_millis(GOSSIP_DELAY));
gossip_messages(n1.clone(), s1.clone(), writer_tx2.clone()).await;
}
});
let handle = tokio::spawn(async move {
handle_messages(node.clone(), store.clone(), &mut reader_rx, writer_tx1).await;
});
let _ = tokio::try_join!(read, handle, write, gossip);
}
async fn read_from_stdin(reader_tx: Sender<Message>) {
let stdin = tokio::io::stdin();
let mut reader = BufReader::new(stdin);
loop {
let mut buf = String::new();
reader.read_line(&mut buf).await.unwrap();
let message = Message::parse_message(buf.clone());
reader_tx.send(message).await.unwrap();
}
}
async fn write_to_stdout(writer_rx: &mut Receiver<Message>) {
let mut stdout = std::io::stdout();
loop {
let message = writer_rx.recv().await.unwrap();
let message = Message::format_message(message);
writeln!(stdout, "{}", message).unwrap();
stdout.flush().unwrap();
}
}
async fn gossip_messages(node: Node, storage: Arc<Mutex<Storage>>, writer: Sender<Message>) {
let mut rng = StdRng::from_entropy();
let num_to_select = rng.gen_range(MIN_AMOUNT_NODES..=NETWORK_SIZE);
let selected_neighbours: Vec<String> = node
.get_network()
.choose_multiple(&mut rng, num_to_select)
.cloned()
.collect();
let mut tasks = vec![];
for n in selected_neighbours {
let storage_clone = storage.clone();
let writer_clone = writer.clone();
let node_clone = node.clone();
let task = tokio::spawn(async move {
let messages = storage_clone
.lock()
.await
.get_new_messages_for_neighbour(n.clone());
if messages.is_empty() {
return;
}
let message = Message {
src: node_clone.id.clone(),
dest: n.clone(),
body: Body::Gossip {
messages: messages.clone(),
},
};
writer_clone.send(message).await.unwrap();
});
tasks.push(task);
}
// Wait for all the gossip tasks to complete
for task in tasks {
task.await.unwrap();
}
}
async fn handle_messages(
node: Node,
storage: Arc<Mutex<Storage>>,
input: &mut Receiver<Message>,
writer: Sender<Message>,
) {
while let Some(input) = input.recv().await {
match input.body {
Body::Broadcast { msg_id, message } => {
let id = node.id.clone();
storage.lock().await.add_message(message);
let response = Message {
src: id,
dest: input.src,
body: Body::BroadcastOk {
msg_id,
in_reply_to: msg_id,
},
};
writer.send(response).await.unwrap();
}
Body::Gossip { messages } => {
let id = node.id.clone();
storage
.lock()
.await
.add_messages(messages.clone(), input.src.clone());
let response = Message {
src: id,
dest: input.src,
body: Body::GossipOk { messages },
};
writer.send(response).await.unwrap();
}
Body::GossipOk { messages } => {
storage
.lock()
.await
.add_to_sent_messages(messages, input.src);
}
Body::Read { msg_id } => {
let response = Message {
src: node.id.clone(),
dest: input.src,
body: Body::ReadOk {
msg_id,
in_reply_to: msg_id,
messages: storage.lock().await.get_messages(),
},
};
writer.send(response).await.unwrap();
}
Body::Topology { msg_id, .. } => {
let response = Message {
src: node.id.clone(),
dest: input.src,
body: Body::TopologyOk {
msg_id,
in_reply_to: msg_id,
},
};
writer.send(response).await.unwrap();
}
Body::Error {
in_reply_to,
code,
text,
} => {
eprintln!(
"Error received (in_reply_to: {}, code: {}, text: {})",
in_reply_to, code, text
);
}
_ => (),
}
}
println!("Error, nothing to read from receiver");
}

69
3e-efficient-broadcast-part-two/src/message.rs
View file

@ -1,69 +0,0 @@
use std::collections::HashMap;
use serde::{Deserialize, Serialize};
#[derive(Clone, Serialize, Deserialize, Debug)]
pub struct Message {
pub src: String,
pub dest: String,
pub body: Body,
}
#[derive(Clone, Serialize, Deserialize, Debug)]
#[serde(tag = "type")]
#[serde(rename_all = "snake_case")]
pub enum Body {
Error {
in_reply_to: u64,
code: u64,
text: String,
},
Init {
msg_id: u64,
node_id: String,
node_ids: Vec<String>,
},
InitOk {
in_reply_to: u64,
},
Broadcast {
msg_id: u64,
message: u64,
},
BroadcastOk {
msg_id: u64,
in_reply_to: u64,
},
Read {
msg_id: u64,
},
ReadOk {
msg_id: u64,
in_reply_to: u64,
messages: Vec<u64>,
},
Topology {
msg_id: u64,
topology: HashMap<String, Vec<String>>,
},
TopologyOk {
msg_id: u64,
in_reply_to: u64,
},
Gossip {
messages: Vec<u64>,
},
GossipOk {
messages: Vec<u64>,
},
}
impl Message {
pub(crate) fn parse_message(message: String) -> Message {
serde_json::from_str(&message).unwrap()
}
pub(crate) fn format_message(message: Message) -> String {
serde_json::to_string(&message).unwrap()
}
}

76
3e-efficient-broadcast-part-two/src/node.rs
View file

@ -1,76 +0,0 @@
use std::{collections::HashSet, io::Write};
use serde::{Deserialize, Serialize};
use tokio::io::{AsyncBufReadExt, BufReader};
use crate::message::{Body, Message};
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub(crate) struct Network(pub(crate) HashSet<String>);
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub(crate) struct Node {
pub(crate) id: String,
pub(crate) availble_nodes: Vec<String>,
pub(crate) network: Network,
}
impl Node {
pub(crate) async fn bootstrap() -> Node {
let stdin = tokio::io::stdin();
let mut stdout = std::io::stdout();
let mut reader = BufReader::new(stdin);
let mut buf = String::new();
reader.read_line(&mut buf).await.unwrap();
let message = Message::parse_message(buf.clone());
let node = Node::init(message.clone());
match message.body {
Body::Init {
msg_id, node_id, ..
} => {
let response = Message {
src: node_id,
dest: message.src.clone(),
body: Body::InitOk {
in_reply_to: msg_id,
},
};
let message = Message::format_message(response);
writeln!(stdout, "{}", message).unwrap();
stdout.flush().unwrap();
}
_ => (),
}
node
}
pub(crate) fn init(message: Message) -> Node {
match message.body {
Body::Init {
node_id, node_ids, ..
} => {
return Node {
id: node_id.clone(),
availble_nodes: node_ids.clone(),
network: Node::init_network(node_ids),
}
}
_ => panic!("Invalid message type"),
}
}
fn init_network(nodes: Vec<String>) -> Network {
let mut neighbours = Network::default();
neighbours.0.extend(nodes);
neighbours
}
pub(crate) fn get_network(&self) -> Vec<String> {
self.network.0.clone().into_iter().collect::<Vec<_>>()
}
}

86
3e-efficient-broadcast-part-two/src/storage.rs
View file

@ -1,86 +0,0 @@
use std::collections::{HashMap, HashSet};
use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub(crate) struct Messages(pub(crate) HashSet<u64>);
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub(crate) struct Storage {
pub(crate) messages: Messages,
pub(crate) received_gossip_messages: HashMap<String, Messages>,
pub(crate) sent_messages: HashMap<String, Messages>,
pub(crate) retry: HashMap<String, u8>,
}
impl Storage {
pub(crate) fn add_message(&mut self, message: u64) {
if !self.messages.0.contains(&message) {
self.messages.0.insert(message);
}
}
pub(crate) fn add_messages(&mut self, messages: Vec<u64>, node: String) {
if self.received_gossip_messages.contains_key(&node) {
self.received_gossip_messages
.get_mut(&node)
.unwrap()
.0
.extend(messages.iter());
} else {
let mut v = Messages::default();
v.0.extend(messages.iter());
self.received_gossip_messages.insert(node, v);
}
for m in messages {
if !self.messages.0.contains(&m) {
self.messages.0.insert(m);
}
}
}
pub(crate) fn get_messages(&mut self) -> Vec<u64> {
self.messages.0.iter().cloned().collect()
}
pub(crate) fn get_new_messages_for_neighbour(&self, node: String) -> Vec<u64> {
let received_messages = self.messages.0.clone().into_iter().collect::<Vec<_>>();
let sent_to_node: Vec<u64> = self
.sent_messages
.iter()
.filter(|(key, _)| *key == &node)
.flat_map(|(_, Messages(value))| value)
.cloned()
.collect();
let received_from_node: Vec<u64> = self
.received_gossip_messages
.iter()
.filter(|(key, _)| *key == &node)
.flat_map(|(_, Messages(value))| value)
.cloned()
.collect();
let filtered_messages: Vec<u64> = received_messages
.into_iter()
.filter(|x| !sent_to_node.contains(x) && !received_from_node.contains(x))
.collect();
filtered_messages
}
pub(crate) fn add_to_sent_messages(&mut self, messages: Vec<u64>, node: String) {
if self.sent_messages.contains_key(&node) {
self.sent_messages
.get_mut(&node)
.unwrap()
.0
.extend(messages);
} else {
self.sent_messages
.insert(node, Messages(messages.iter().cloned().collect()));
}
}
}

1
4-grow-only-counter/.gitignore vendored
View file

@ -1 +0,0 @@
/target

89
4-grow-only-counter/Cargo.lock generated
View file

@ -1,89 +0,0 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "ch4-grow-only-counter"
version = "0.1.0"
dependencies = [
"serde",
"serde_json",
]
[[package]]
name = "itoa"
version = "1.0.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "453ad9f582a441959e5f0d088b02ce04cfe8d51a8eaf077f12ac6d3e94164ca6"
[[package]]
name = "proc-macro2"
version = "1.0.58"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fa1fb82fc0c281dd9671101b66b771ebbe1eaf967b96ac8740dcba4b70005ca8"
dependencies = [
"unicode-ident",
]
[[package]]
name = "quote"
version = "1.0.27"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f4f29d145265ec1c483c7c654450edde0bfe043d3938d6972630663356d9500"
dependencies = [
"proc-macro2",
]
[[package]]
name = "ryu"
version = "1.0.13"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f91339c0467de62360649f8d3e185ca8de4224ff281f66000de5eb2a77a79041"
[[package]]
name = "serde"
version = "1.0.163"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2113ab51b87a539ae008b5c6c02dc020ffa39afd2d83cffcb3f4eb2722cebec2"
dependencies = [
"serde_derive",
]
[[package]]
name = "serde_derive"
version = "1.0.163"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8c805777e3930c8883389c602315a24224bcc738b63905ef87cd1420353ea93e"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "serde_json"
version = "1.0.96"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "057d394a50403bcac12672b2b18fb387ab6d289d957dab67dd201875391e52f1"
dependencies = [
"itoa",
"ryu",
"serde",
]
[[package]]
name = "syn"
version = "2.0.16"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a6f671d4b5ffdb8eadec19c0ae67fe2639df8684bd7bc4b83d986b8db549cf01"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "unicode-ident"
version = "1.0.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"

8
4-grow-only-counter/Cargo.toml
View file

@ -1,8 +0,0 @@
[package]
name = "ch4-grow-only-counter"
version = "0.1.0"
edition = "2021"
[dependencies]
serde = {version = "1", features = ["derive"] }
serde_json = "1"

6
4-grow-only-counter/rustfmt.toml
View file

@ -1,6 +0,0 @@
hard_tabs = true
imports_granularity = "Crate"
reorder_impl_items = true
reorder_imports = true
group_imports = "StdExternalCrate"
reorder_modules = true

189
4-grow-only-counter/src/main.rs
View file

@ -1,189 +0,0 @@
use std::io::{self, BufRead, Write};
use serde::{Deserialize, Serialize};
const SEQ_KV: &str = "seq-kv";
const KEY: &str = "counter";
#[derive(Serialize, Deserialize, Debug)]
struct Message {
src: String,
dest: String,
body: Body,
}
#[derive(Serialize, Deserialize, Debug)]
#[serde(tag = "type")]
#[serde(rename_all = "snake_case")]
enum Body {
Error {
in_reply_to: u64,
code: u64,
text: String,
},
Init {
msg_id: u64,
node_id: String,
node_ids: Vec<String>,
},
InitOk {
in_reply_to: u64,
},
Read {
msg_id: Option<u64>,
key: Option<String>,
},
ReadOk {
in_reply_to: Option<u64>,
value: u64,
},
Add {
msg_id: u64,
delta: u64,
},
AddOk {
in_reply_to: u64,
},
Write {
msg_id: u64,
key: String,
value: u64,
},
WriteOk {
in_reply_to: u64,
},
Cas {
msg_id: u64,
key: String,
from: u64,
to: u64,
},
CasOk {
msg_id: u64,
in_reply_to: u64,
},
}
fn main() {
let stdin = io::stdin();
let mut stdout = io::stdout();
let mut stderr = io::stderr();
let mut id = String::new();
let mut counter = 0;
let mut tmp_counter = 0;
for line in stdin.lock().lines() {
let input = serde_json::from_str::<Message>(&line.as_ref().unwrap());
if let Err(e) = input {
writeln!(stderr, "Error: {:?}", e).unwrap();
stderr.flush().unwrap();
continue;
}
let input: Message = serde_json::from_str(&line.unwrap()).unwrap();
match input.body {
Body::Error { code, .. } => match code {
22 => {
let output = Message {
src: id.clone(),
dest: SEQ_KV.to_string(),
body: Body::Read {
msg_id: Some(2),
key: Some(KEY.to_string()),
},
};
let output_json = serde_json::to_string(&output).unwrap();
writeln!(stdout, "{}", output_json).unwrap();
stdout.flush().unwrap();
}
_ => {
writeln!(stderr, "Error: {:?}", input).unwrap();
stderr.flush().unwrap();
}
},
Body::Init {
msg_id, node_id, ..
} => {
id = node_id.clone();
let output = Message {
src: id.clone(),
dest: input.src,
body: Body::InitOk {
in_reply_to: msg_id,
},
};
let output_json = serde_json::to_string(&output).unwrap();
writeln!(stdout, "{}", output_json).unwrap();
let output = Message {
src: id.clone(),
dest: SEQ_KV.to_string(),
body: Body::Write {
msg_id,
key: KEY.to_string(),
value: counter,
},
};
let output_json = serde_json::to_string(&output).unwrap();
writeln!(stdout, "{}", output_json).unwrap();
stdout.flush().unwrap();
}
Body::Read { msg_id, .. } => {
let output = Message {
src: id.clone(),
dest: input.src,
body: Body::ReadOk {
in_reply_to: msg_id,
value: counter,
},
};
let output_json = serde_json::to_string(&output).unwrap();
writeln!(stdout, "{}", output_json).unwrap();
stdout.flush().unwrap();
}
Body::Add { msg_id, delta } => {
tmp_counter += delta;
let output = Message {
src: id.clone(),
dest: SEQ_KV.to_string(),
body: Body::Cas {
msg_id,
key: KEY.to_string(),
from: counter,
to: tmp_counter,
},
};
let output_json = serde_json::to_string(&output).unwrap();
writeln!(stdout, "{}", output_json).unwrap();
let output = Message {
src: id.clone(),
dest: input.src,
body: Body::AddOk {
in_reply_to: msg_id,
},
};
let output_json = serde_json::to_string(&output).unwrap();
writeln!(stdout, "{}", output_json).unwrap();
stdout.flush().unwrap();
}
Body::WriteOk { .. } => {
//
}
Body::AddOk { .. } => {
//
}
Body::CasOk { .. } => {
counter = tmp_counter;
}
Body::ReadOk { value, .. } => {
counter = value;
}
_ => println!("Unhandled message: {:?}", input),
}
}
}

2
README.md
View file

@ -1,5 +1,3 @@
# Distributed system challenges by fly.io
My attempt at solving the challenges with Rust.
https://fly.io/dist-sys/