From a6016c7eeb11fc8aeaa1a3b160b970b15362695d Mon Sep 17 00:00:00 2001
From: hozan23 <hozan23@karyontech.net>
Date: Sun, 19 May 2024 22:20:03 +0200
Subject: add tokio examples to p2p, jsonrpc, and net crates

---
 net/examples/tcp_codec_tokio/src/main.rs | 57 ++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 net/examples/tcp_codec_tokio/src/main.rs

(limited to 'net/examples/tcp_codec_tokio/src')

diff --git a/net/examples/tcp_codec_tokio/src/main.rs b/net/examples/tcp_codec_tokio/src/main.rs
new file mode 100644
index 0000000..9865bfa
--- /dev/null
+++ b/net/examples/tcp_codec_tokio/src/main.rs
@@ -0,0 +1,57 @@
+use std::time::Duration;
+
+use karyon_core::async_util::sleep;
+
+use karyon_net::{
+    codec::{Codec, Decoder, Encoder},
+    tcp, ConnListener, Connection, Endpoint, Result,
+};
+
+#[derive(Clone)]
+struct NewLineCodec {}
+
+impl Codec for NewLineCodec {
+    type Item = String;
+}
+
+impl Encoder for NewLineCodec {
+    type EnItem = String;
+    fn encode(&self, src: &Self::EnItem, dst: &mut [u8]) -> Result<usize> {
+        dst[..src.len()].copy_from_slice(src.as_bytes());
+        Ok(src.len())
+    }
+}
+
+impl Decoder for NewLineCodec {
+    type DeItem = String;
+    fn decode(&self, src: &mut [u8]) -> Result<Option<(usize, Self::DeItem)>> {
+        match src.iter().position(|&b| b == b'\n') {
+            Some(i) => Ok(Some((i + 1, String::from_utf8(src[..i].to_vec()).unwrap()))),
+            None => Ok(None),
+        }
+    }
+}
+
+#[tokio::main]
+async fn main() {
+    let endpoint: Endpoint = "tcp://127.0.0.1:3000".parse().unwrap();
+
+    let config = tcp::TcpConfig::default();
+
+    let listener = tcp::listen(&endpoint, config.clone(), NewLineCodec {})
+        .await
+        .unwrap();
+    tokio::spawn(async move {
+        if let Ok(conn) = listener.accept().await {
+            loop {
+                let msg = conn.recv().await.unwrap();
+                println!("Receive a message: {:?}", msg);
+            }
+        };
+    });
+
+    let conn = tcp::dial(&endpoint, config, NewLineCodec {}).await.unwrap();
+    conn.send("hello".to_string()).await.unwrap();
+    conn.send(" world\n".to_string()).await.unwrap();
+    sleep(Duration::from_secs(1)).await;
+}
-- 
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