Add tracing-trace

tracing-trace/src/lib.rs

@@ -0,0 +1,40 @@
+use std::io::{Read, Write};
+
+use entry::Entry;
+
+pub mod entry;
+mod error;
+pub mod layer;
+pub mod processor;
+
+pub use error::Error;
+
+pub struct Trace<W: Write> {
+    writer: W,
+    receiver: std::sync::mpsc::Receiver<Entry>,
+}
+
+pub struct TraceReader<R: Read> {
+    reader: R,
+}
+
+impl<R: Read> TraceReader<R> {
+    pub fn new(reader: R) -> Self {
+        Self { reader }
+    }
+
+    fn read(&mut self) -> Option<Result<Entry, Error>> {
+        serde_json::Deserializer::from_reader(&mut self.reader)
+            .into_iter()
+            .next()
+            .map(|res| res.map_err(Into::into))
+    }
+}
+
+impl<R: Read> Iterator for TraceReader<R> {
+    type Item = Result<Entry, Error>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.read()
+    }
+}