concurrent reading

src/tui/log_viewer/filters.rs

@@ -1,4 +1,4 @@
-use std::rc::Rc;
+use std::sync::Arc;
 
 use serde::{Deserialize, Serialize};
 
@@ -6,7 +6,7 @@ use crate::tui::filter::Filter;
 
 #[derive(Serialize, Deserialize)]
 pub struct Filters {
-    filters: Vec<Rc<Filter>>,
+    filters: Vec<Arc<Filter>>,
     undo_pos: usize,
 }
 
@@ -18,11 +18,11 @@ impl Filters {
         }
     }
 
-    pub fn get(&self) -> &[Rc<Filter>] {
+    pub fn get(&self) -> &[Arc<Filter>] {
         &self.filters[0..self.undo_pos]
     }
 
-    pub fn push(&mut self, filter: Rc<Filter>) {
+    pub fn push(&mut self, filter: Arc<Filter>) {
         self.filters.truncate(self.undo_pos);
         self.filters.push(filter);
         self.undo_pos = self.filters.len();

src/tui/log_viewer/mod.rs

@@ -1,4 +1,4 @@
-use std::{collections::HashMap, iter, mem, rc::Rc};
+use std::{collections::HashMap, iter, mem, sync::Arc};
 
 use crate::tui::{
     filter::Filter,
@@ -58,7 +58,7 @@ impl LogViewer {
     pub fn filtered_root_stream(&self) -> Box<dyn LogStream> {
         let mut curr = self.root_stream.clone();
         for filter in self.filters.get() {
-            curr = Box::new(curr.filter(Rc::clone(filter)));
+            curr = Box::new(curr.filter(Arc::clone(filter)));
         }
 
         curr
@@ -78,12 +78,12 @@ impl LogViewer {
 
         fn find_elem_in_stream(
             stream: &dyn LogStream,
-            elem: &Rc<LogEntry>,
+            elem: &Arc<LogEntry>,
         ) -> Option<Box<dyn LogStream>> {
             let mut temp_stream = stream.clone();
             let mut max = 100usize;
             while let Some((curr, _)) = temp_stream.next() {
-                if Rc::ptr_eq(&curr, elem) {
+                if Arc::ptr_eq(&curr, elem) {
                     return Some(temp_stream);
                 }
 
@@ -162,8 +162,8 @@ impl LogViewer {
         self.stack = new_stack;
     }
 
-    pub fn add_filter(&mut self, filter: Rc<Filter>) {
+    pub fn add_filter(&mut self, filter: Arc<Filter>) {
-        self.filters.push(Rc::clone(&filter));
+        self.filters.push(Arc::clone(&filter));
         self.update_filters();
     }
 
@@ -200,7 +200,7 @@ impl LogViewer {
         }
     }
 
-    pub fn items(&mut self, max: usize) -> Option<(Vec<(Rc<LogEntry>, usize)>, usize)> {
+    pub fn items(&mut self, max: usize) -> Option<(Vec<(Arc<LogEntry>, usize)>, usize)> {
         let mut temp_iter = self.curr.iter.clone();
         let mut res = Vec::new();
         for _ in 0..max {
@@ -241,7 +241,7 @@ impl LogViewer {
         }
     }
 
-    pub fn selected(&self) -> Option<(Rc<LogEntry>, usize)> {
+    pub fn selected(&self) -> Option<(Arc<LogEntry>, usize)> {
         self.curr.selected()
     }
 

src/tui/log_viewer/view.rs

@@ -1,4 +1,4 @@
-use std::rc::Rc;
+use std::sync::Arc;
 
 use crate::tui::{model::LogEntry, processing::LogStream};
 
@@ -8,7 +8,7 @@ pub struct LogView {
 }
 
 impl LogView {
-    pub fn selected(&self) -> Option<(Rc<LogEntry>, usize)> {
+    pub fn selected(&self) -> Option<(Arc<LogEntry>, usize)> {
         let mut temp_iter = self.iter.clone();
         for _ in 0..self.selection_offset {
             let _ = temp_iter.next()?;

src/tui/mod.rs

@@ -12,7 +12,7 @@ use std::{
     ops::ControlFlow,
     path::{Path, PathBuf},
     process::exit,
-    rc::Rc,
+    sync::Arc,
 };
 use tui_widget_list::{ListBuilder, ListView};
 
@@ -31,7 +31,7 @@ use ratatui::{
     crossterm::event::{self, Event, KeyCode, KeyEvent, KeyModifiers},
     layout::{Constraint, HorizontalAlignment, Layout, Rect},
     prelude::CrosstermBackend,
-    style::{Modifier, Style},
+    style::Style,
     text::Line,
     widgets::{
         Block, Clear, List, ListItem, ListState, Padding, Paragraph, StatefulWidget, Widget, Wrap,
@@ -250,7 +250,7 @@ impl App {
                     if let InputState::Target(t) = lv.input_state.clone()
                         && let Some(m) = Matcher::from_input(t, lv)
                     {
-                        lv.add_filter(Rc::new(Filter {
+                        lv.add_filter(Arc::new(Filter {
                             matcher: m,
                             kind: FilterKind::Remove,
                         }));
@@ -266,7 +266,7 @@ impl App {
                     if let InputState::Target(t) = lv.input_state.clone()
                         && let Some(m) = Matcher::from_input(t, lv)
                     {
-                        lv.add_filter(Rc::new(Filter {
+                        lv.add_filter(Arc::new(Filter {
                             matcher: m,
                             kind: FilterKind::Inline,
                         }));

src/tui/model.rs

@@ -2,8 +2,7 @@ use std::{
     collections::BTreeMap,
     hash::{DefaultHasher, Hash, Hasher},
     path::PathBuf,
-    rc::Rc,
+    sync::{Arc, OnceLock},
-    sync::OnceLock,
 };
 
 use jiff::Timestamp;
@@ -45,7 +44,7 @@ pub enum LogEntry {
     },
     Sub {
         enter: RawLogEntry,
-        sub_entries: Vec<Rc<LogEntry>>,
+        sub_entries: Vec<Arc<LogEntry>>,
         exit: RawLogEntry,
 
         count_sub: OnceLock<usize>,

src/tui/processing.rs

@@ -1,4 +1,4 @@
-use std::rc::Rc;
+use std::sync::Arc;
 
 use crate::tui::{
     filter::{Filter, FilterKind},
@@ -13,23 +13,23 @@ pub trait IntoLogStream {
 }
 
 pub struct LogEntryStream {
-    inner: Rc<LogEntry>,
+    inner: Arc<LogEntry>,
     curr: usize,
     inline_depth: usize,
 }
 
 impl LogStream for LogEntryStream {
-    fn next(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn next(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         let LogEntry::Sub { sub_entries, .. } = self.inner.as_ref() else {
             return None;
         };
 
         let res = sub_entries.get(self.curr)?;
         self.curr += 1;
-        Some((Rc::clone(res), self.inline_depth))
+        Some((Arc::clone(res), self.inline_depth))
     }
 
-    fn prev(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn prev(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         let LogEntry::Sub { sub_entries, .. } = self.inner.as_ref() else {
             return None;
         };
@@ -40,29 +40,29 @@ impl LogStream for LogEntryStream {
 
         self.curr -= 1;
         let res = sub_entries.get(self.curr)?;
-        Some((Rc::clone(res), self.inline_depth))
+        Some((Arc::clone(res), self.inline_depth))
     }
 
     fn clone(&self) -> Box<dyn LogStream> {
         Box::new(Self {
-            inner: Rc::clone(&self.inner),
+            inner: Arc::clone(&self.inner),
             curr: self.curr,
             inline_depth: self.inline_depth,
         })
     }
 
-    fn enclosing_log_entry(&self) -> Option<(Rc<LogEntry>, usize)> {
+    fn enclosing_log_entry(&self) -> Option<(Arc<LogEntry>, usize)> {
-        Some((Rc::clone(&self.inner), self.inline_depth))
+        Some((Arc::clone(&self.inner), self.inline_depth))
     }
 }
 
-impl IntoLogStream for &Rc<LogEntry> {
+impl IntoLogStream for &Arc<LogEntry> {
     type Stream = LogEntryStream;
 
     fn from_end(self, inline_depth: usize) -> Option<Self::Stream> {
         if let LogEntry::Sub { sub_entries, .. } = self.as_ref() {
             Some(LogEntryStream {
-                inner: Rc::clone(&self),
+                inner: Arc::clone(&self),
                 curr: sub_entries.len(),
                 inline_depth,
             })
@@ -74,7 +74,7 @@ impl IntoLogStream for &Rc<LogEntry> {
     fn from_start(self, inline_depth: usize) -> Option<Self::Stream> {
         if let LogEntry::Sub { .. } = self.as_ref() {
             Some(LogEntryStream {
-                inner: Rc::clone(&self),
+                inner: Arc::clone(&self),
                 curr: 0,
                 inline_depth,
             })
@@ -85,14 +85,14 @@ impl IntoLogStream for &Rc<LogEntry> {
 }
 
 pub trait LogStream {
-    fn next(&mut self) -> Option<(Rc<LogEntry>, usize)>;
+    fn next(&mut self) -> Option<(Arc<LogEntry>, usize)>;
-    fn prev(&mut self) -> Option<(Rc<LogEntry>, usize)>;
+    fn prev(&mut self) -> Option<(Arc<LogEntry>, usize)>;
 
-    fn enclosing_log_entry(&self) -> Option<(Rc<LogEntry>, usize)>;
+    fn enclosing_log_entry(&self) -> Option<(Arc<LogEntry>, usize)>;
 
     fn clone(&self) -> Box<dyn LogStream>;
 
-    fn filter(&self, filter: Rc<Filter>) -> FilteredLogStream {
+    fn filter(&self, filter: Arc<Filter>) -> FilteredLogStream {
         FilteredLogStream {
             filter: filter,
             stack: vec![(self.enclosing_log_entry(), self.clone())],
@@ -101,8 +101,8 @@ pub trait LogStream {
 }
 
 pub struct FilteredLogStream {
-    filter: Rc<Filter>,
+    filter: Arc<Filter>,
-    stack: Vec<(Option<(Rc<LogEntry>, usize)>, Box<dyn LogStream>)>,
+    stack: Vec<(Option<(Arc<LogEntry>, usize)>, Box<dyn LogStream>)>,
 }
 
 macro_rules! generate_candidate {
@@ -140,7 +140,7 @@ macro_rules! generate_filter {
                         if let Some(iter) = elem.$into_iter(inline_depth + 1) {
                             $_self
                                 .stack
-                                .push((Some((Rc::clone(&elem), inline_depth)), Box::new(iter)));
+                                .push((Some((Arc::clone(&elem), inline_depth)), Box::new(iter)));
                         }
                         // Continue so we actually return a nested item.
                         if $forwards {
@@ -162,26 +162,26 @@ macro_rules! generate_filter {
 }
 
 impl FilteredLogStream {
-    fn next_candidate(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn next_candidate(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         generate_candidate!(self, next, true)
     }
-    fn prev_candidate(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn prev_candidate(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         generate_candidate!(self, prev, false)
     }
 }
 
 impl LogStream for FilteredLogStream {
-    fn next(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn next(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         generate_filter!(self, next_candidate, from_start, true)
     }
 
-    fn prev(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn prev(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         generate_filter!(self, prev_candidate, from_end, false)
     }
 
     fn clone(&self) -> Box<dyn LogStream> {
         Box::new(Self {
-            filter: Rc::clone(&self.filter),
+            filter: Arc::clone(&self.filter),
             stack: self
                 .stack
                 .iter()
@@ -190,7 +190,7 @@ impl LogStream for FilteredLogStream {
         })
     }
 
-    fn enclosing_log_entry(&self) -> Option<(Rc<LogEntry>, usize)> {
+    fn enclosing_log_entry(&self) -> Option<(Arc<LogEntry>, usize)> {
         self.stack[0].0.clone()
     }
 }

src/tui/reader.rs

@@ -4,8 +4,12 @@ use std::{
     io::{self, BufRead, BufReader},
     mem,
     path::{Path, PathBuf},
-    rc::Rc,
+    sync::Arc,
-    sync::OnceLock,
+    sync::{
+        OnceLock,
+        mpsc::{Receiver, sync_channel},
+    },
+    thread,
 };
 
 use crate::tui::{
@@ -13,32 +17,14 @@ use crate::tui::{
     processing::LogStream,
 };
 
-struct Inner {
+struct LogFileEntryGenerator {
-    pub path: PathBuf,
-
     file: BufReader<File>,
-    cached_entries: Vec<Rc<LogEntry>>,
-}
-
-#[derive(Clone)]
-pub struct LogfileReader(Rc<RefCell<Inner>>);
-
-impl LogfileReader {
-    pub fn new(p: &Path) -> io::Result<Self> {
-        Ok(Self(Rc::new(RefCell::new(Inner {
-            file: BufReader::new(File::open(p)?),
-            path: p.to_path_buf(),
-            cached_entries: Vec::new(),
-        }))))
-    }
-
-    pub fn path(&self) -> PathBuf {
-        self.0.borrow().path.clone()
 }
 
+impl LogFileEntryGenerator {
     fn next_line(&mut self) -> Option<String> {
         let mut res = String::new();
-        match self.0.borrow_mut().file.read_line(&mut res) {
+        match self.file.read_line(&mut res) {
             Err(e) => {
                 eprintln!("error: {e:?}");
                 None
@@ -59,14 +45,14 @@ impl LogfileReader {
         }
     }
 
-    fn next_entry(&mut self) -> Option<Rc<LogEntry>> {
+    fn next_entry(&mut self) -> Option<Arc<LogEntry>> {
-        let mut stack = Vec::<(RawLogEntry, Vec<Rc<LogEntry>>)>::new();
+        let mut stack = Vec::<(RawLogEntry, Vec<Arc<LogEntry>>)>::new();
-        let mut curr = Vec::<Rc<LogEntry>>::new();
+        let mut curr = Vec::<Arc<LogEntry>>::new();
 
         loop {
             let entry = self.next_raw_entry()?;
 
-            let new_entry = Rc::new(match entry.fields.message() {
+            let new_entry = Arc::new(match entry.fields.message() {
                 Some("enter") => {
                     stack.push((entry, mem::take(&mut curr)));
                     continue;
@@ -94,14 +80,49 @@ impl LogfileReader {
             }
         }
     }
+}
 
-    fn fill_buf_to_access_index(&mut self, n: usize) -> Option<Rc<LogEntry>> {
+struct Inner {
+    pub path: PathBuf,
+
+    entry_generator: Receiver<Arc<LogEntry>>,
+    cached_entries: Vec<Arc<LogEntry>>,
+}
+
+#[derive(Clone)]
+pub struct LogfileReader(Arc<RefCell<Inner>>);
+
+impl LogfileReader {
+    pub fn new(p: &Path) -> io::Result<Self> {
+        let (tx, rx) = sync_channel(1000);
+        let mut generator = LogFileEntryGenerator {
+            file: BufReader::new(File::open(p)?),
+        };
+
+        thread::spawn(move || {
+            while let Some(i) = generator.next_entry() {
+                tx.send(i).unwrap();
+            }
+        });
+
+        Ok(Self(Arc::new(RefCell::new(Inner {
+            path: p.to_path_buf(),
+            cached_entries: Vec::new(),
+            entry_generator: rx,
+        }))))
+    }
+
+    pub fn path(&self) -> PathBuf {
+        self.0.borrow().path.clone()
+    }
+
+    fn fill_buf_to_access_index(&mut self, n: usize) -> Option<Arc<LogEntry>> {
         while self.0.borrow().cached_entries.len() <= n {
-            let entry = self.next_entry()?;
+            let entry = self.0.borrow().entry_generator.recv().ok()?;
             self.0.borrow_mut().cached_entries.push(entry);
         }
 
-        Some(Rc::clone(&self.0.borrow().cached_entries[n]))
+        Some(Arc::clone(&self.0.borrow().cached_entries[n]))
     }
 
     pub fn iter(&self) -> LogFileReaderStream {
@@ -118,14 +139,14 @@ pub struct LogFileReaderStream {
 }
 
 impl LogStream for LogFileReaderStream {
-    fn next(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn next(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         let entry = self.reader.fill_buf_to_access_index(self.curr)?;
         self.curr += 1;
 
         Some((entry, 0))
     }
 
-    fn prev(&mut self) -> Option<(Rc<LogEntry>, usize)> {
+    fn prev(&mut self) -> Option<(Arc<LogEntry>, usize)> {
         if self.curr == 0 {
             return None;
         }
@@ -143,7 +164,7 @@ impl LogStream for LogFileReaderStream {
         })
     }
 
-    fn enclosing_log_entry(&self) -> Option<(Rc<LogEntry>, usize)> {
+    fn enclosing_log_entry(&self) -> Option<(Arc<LogEntry>, usize)> {
         None
     }
 }

src/tui/widgets/items.rs

@@ -1,4 +1,4 @@
-use std::{cell::OnceCell, rc::Rc};
+use std::{cell::OnceCell, sync::Arc};
 
 use itertools::Itertools;
 use ratatui::widgets::{List, ListItem, Widget};
@@ -19,7 +19,7 @@ pub struct TreeState {
 }
 
 impl TreeState {
-    pub fn from_items(items: &[(Rc<LogEntry>, usize)]) -> Self {
+    pub fn from_items(items: &[(Arc<LogEntry>, usize)]) -> Self {
         let mut res = Vec::new();
         let mut curr = String::new();
         let mut prev_depth = 0;
@@ -88,7 +88,7 @@ impl TreeState {
 }
 
 pub struct Items<'a> {
-    items: Vec<(Rc<LogEntry>, usize)>,
+    items: Vec<(Arc<LogEntry>, usize)>,
     selected_offset: usize,
     input_state: &'a InputState,
 
@@ -98,7 +98,7 @@ pub struct Items<'a> {
 
 impl<'a> Items<'a> {
     pub fn new(
-        items: Vec<(Rc<LogEntry>, usize)>,
+        items: Vec<(Arc<LogEntry>, usize)>,
         selected_offset: usize,
         input_state: &'a InputState,
         selected_footer_field: Option<(String, String)>,
@@ -113,7 +113,7 @@ impl<'a> Items<'a> {
         }
     }
 
-    pub fn selected(&self) -> Option<&Rc<LogEntry>> {
+    pub fn selected(&self) -> Option<&Arc<LogEntry>> {
         self.items.get(self.selected_offset).map(|(s, _)| s)
     }
 }