added parallelized scraping instances for company yahoo ticker seeding

src/corporate/mod.rs

@@ -8,5 +8,7 @@ pub mod aggregation;
 pub mod fx;
 pub mod openfigi;
 pub mod yahoo;
+pub mod update_parallel;
+
 
 pub use update::run_full_update;

src/corporate/update.rs

@@ -1,7 +1,7 @@
 // src/corporate/update.rs - ABORT-SAFE VERSION WITH JSONL LOG
-
 use super::{scraper::*, storage::*, helpers::*, types::*, openfigi::*, yahoo::*};
 use crate::config::Config;
+use crate::corporate::update_parallel::build_companies_jsonl_streaming_parallel;
 use crate::util::directories::DataPaths;
 use crate::util::logger;
 use crate::scraper::webdriver::ChromeDriverPool;
@@ -73,7 +73,7 @@ pub async fn run_full_update(
     }
 
     logger::log_info("Step 5: Building companies.jsonl (streaming with abort-safe persistence)...").await;
-    let count = build_companies_jsonl_streaming(&paths, pool, shutdown_flag).await?;
+    let count = build_companies_jsonl_streaming_parallel(&paths, pool, shutdown_flag).await?;
     logger::log_info(&format!("  ✓ Saved {} companies", count)).await;
 
     if !shutdown_flag.load(Ordering::SeqCst) {
@@ -90,15 +90,31 @@ pub async fn run_full_update(
 /// 
 /// Implements the data_updating_rule.md specification:
 /// - Append-only JSONL log for all updates
-/// - fsync after each write batch
+/// - Batched fsync for performance (configurable batch size)
+/// - Time-based fsync for safety (max 10 seconds without fsync)
 /// - Atomic checkpoints via temp file + rename
 /// - Crash recovery by loading checkpoint + replaying log
-/// - Partial lines ignored during recovery
+/// - Partial lines automatically ignored by .lines() iterator
+/// 
+/// # Error Handling & Crash Safety
+/// 
+/// If any write or fsync fails:
+/// - Function returns error immediately
+/// - Partial line may be in OS buffer but not fsynced
+/// - On next startup, .lines() will either:
+///   a) Skip partial line (if no \n written)
+///   b) Fail to parse malformed JSON (logged and skipped)
+/// - No data corruption, at most last batch entries lost
 async fn build_companies_jsonl_streaming(
     paths: &DataPaths, 
     pool: &Arc<ChromeDriverPool>,
     shutdown_flag: &Arc<AtomicBool>,
 ) -> anyhow::Result<usize> {
+    // Configuration constants
+    const CHECKPOINT_INTERVAL: usize = 50;  // Create checkpoint every N updates
+    const FSYNC_BATCH_SIZE: usize = 10;     // fsync every N writes for performance
+    const FSYNC_INTERVAL_SECS: u64 = 10;    // Also fsync every N seconds for safety
+    
     let path = DataPaths::new(".")?;
     let corporate_path = path.data_dir().join("corporate").join("by_name");
     let securities_path = corporate_path.join("common_stocks.json");
@@ -125,23 +141,22 @@ async fn build_companies_jsonl_streaming(
     if companies_path.exists() {
         logger::log_info("Loading checkpoint from companies.jsonl...").await;
         let existing_content = tokio::fs::read_to_string(&companies_path).await?;
+        
+        // Note: .lines() only returns complete lines terminated with \n
+        // Partial lines (incomplete writes from crashes) are automatically skipped
         for line in existing_content.lines() {
             if line.trim().is_empty() {
                 continue;
             }
-            // Only process complete lines (ending with proper JSON closing brace)
-            // This ensures we don't process partial writes from crashed processes
-            if !line.ends_with('}') {
-                logger::log_warn(&format!("Skipping incomplete checkpoint line: {}", &line[..line.len().min(50)])).await;
-                continue;
-            }
+            
             match serde_json::from_str::<CompanyCrossPlatformInfo>(line) {
                 Ok(company) => {
                     processed_names.insert(company.name.clone());
                     existing_companies.insert(company.name.clone(), company);
                 }
                 Err(e) => {
-                    logger::log_warn(&format!("Failed to parse checkpoint line: {}", e)).await;
+                    // This catches both malformed JSON and partial lines
+                    logger::log_warn(&format!("Skipping invalid checkpoint line: {}", e)).await;
                 }
             }
         }
@@ -153,16 +168,14 @@ async fn build_companies_jsonl_streaming(
         logger::log_info("Replaying update log...").await;
         let log_content = tokio::fs::read_to_string(&log_path).await?;
         let mut replayed = 0;
+        
+        // Note: .lines() only returns complete lines terminated with \n
+        // Partial lines from crashes are automatically skipped
         for line in log_content.lines() {
             if line.trim().is_empty() {
                 continue;
             }
-            // Only replay complete lines (crash-safe: incomplete lines are ignored)
-            // A line is considered complete only if it ends with '\n' and valid JSON
-            if !line.ends_with('}') {
-                logger::log_warn(&format!("Skipping incomplete log line: {}", &line[..line.len().min(50)])).await;
-                continue;
-            }
+            
             match serde_json::from_str::<CompanyCrossPlatformInfo>(line) {
                 Ok(company) => {
                     processed_names.insert(company.name.clone());
@@ -170,7 +183,8 @@ async fn build_companies_jsonl_streaming(
                     replayed += 1;
                 }
                 Err(e) => {
-                    logger::log_warn(&format!("Failed to parse log line: {}", e)).await;
+                    // This catches both malformed JSON and partial lines
+                    logger::log_warn(&format!("Skipping invalid log line: {}", e)).await;
                 }
             }
         }
@@ -190,9 +204,12 @@ async fn build_companies_jsonl_streaming(
     let mut count = existing_companies.len();
     let mut updated_count = 0;
     let mut new_count = 0;
-    let checkpoint_interval = 50; // Create atomic checkpoint every 50 updates
     let mut updates_since_checkpoint = 0;
     
+    // Batched fsync tracking for performance
+    let mut writes_since_fsync = 0;
+    let mut last_fsync = std::time::Instant::now();
+    
     use tokio::io::AsyncWriteExt;
     
     for (name, company_info) in securities.iter() {
@@ -296,18 +313,29 @@ async fn build_companies_jsonl_streaming(
                 exchange,
             };
             
-            // === APPEND-ONLY: Write single-line JSON with fsync ===
-            // This guarantees the line is either fully written or not at all
+            // === APPEND-ONLY: Write single-line JSON with batched fsync ===
+            // Write guarantees the line is either fully written or not at all
             let line = serde_json::to_string(&company_entry)?;
             log_file.write_all(line.as_bytes()).await?;
             log_file.write_all(b"\n").await?;
-            log_file.flush().await?;
+            writes_since_fsync += 1;
             
-            // Critical: fsync to ensure durability before considering write successful
+            // Batched fsync for performance + time-based fsync for safety
+            // fsync if: batch size reached OR time interval exceeded
+            let should_fsync = writes_since_fsync >= FSYNC_BATCH_SIZE 
+                || last_fsync.elapsed().as_secs() >= FSYNC_INTERVAL_SECS;
+            
+            if should_fsync {
+                log_file.flush().await?;
+                // Critical: fsync to ensure durability before considering writes successful
                 // This prevents data loss on power failure or kernel panic
                 log_file.sync_data().await?;
+                writes_since_fsync = 0;
+                last_fsync = std::time::Instant::now();
+            }
             
-            // Update in-memory state ONLY after successful fsync
+            // Update in-memory state ONLY after write (fsync happens in batches)
+            // This is safe because we fsync before checkpoints and at end of processing
             processed_names.insert(name.clone());
             existing_companies.insert(name.clone(), company_entry);
             
@@ -322,7 +350,15 @@ async fn build_companies_jsonl_streaming(
             
             // === ATOMIC CHECKPOINT: Periodically create checkpoint ===
             // This reduces recovery time by snapshotting current state
-            if updates_since_checkpoint >= checkpoint_interval {
+            if updates_since_checkpoint >= CHECKPOINT_INTERVAL {
+                // Ensure any pending writes are fsynced before checkpoint
+                if writes_since_fsync > 0 {
+                    log_file.flush().await?;
+                    log_file.sync_data().await?;
+                    writes_since_fsync = 0;
+                    last_fsync = std::time::Instant::now();
+                }
+                
                 logger::log_info(&format!("Creating checkpoint at {} companies...", count)).await;
                 
                 let checkpoint_tmp = companies_path.with_extension("jsonl.tmp");
@@ -362,10 +398,30 @@ async fn build_companies_jsonl_streaming(
                 tokio::task::yield_now().await;
             }
         }
+        
+        // Time-based fsync: Even if this company didn't result in a write,
+        // fsync any pending writes if enough time has passed
+        // This reduces data loss window during long Yahoo lookup operations
+        if writes_since_fsync > 0 && last_fsync.elapsed().as_secs() >= FSYNC_INTERVAL_SECS {
+            log_file.flush().await?;
+            log_file.sync_data().await?;
+            writes_since_fsync = 0;
+            last_fsync = std::time::Instant::now();
+            logger::log_info("Time-based fsync completed").await;
+        }
+    }
+    
+    // === FSYNC PENDING WRITES: Even if shutdown requested, save what we have ===
+    if writes_since_fsync > 0 {
+        logger::log_info(&format!("Fsyncing {} pending writes...", writes_since_fsync)).await;
+        log_file.flush().await?;
+        log_file.sync_data().await?;
+        logger::log_info("✓ Pending writes saved").await;
     }
     
     // === FINAL CHECKPOINT: Write complete final state ===
     // This ensures we don't need to replay the log on next startup
+    // (Pending writes were already fsynced above)
     if !shutdown_flag.load(Ordering::SeqCst) && updates_since_checkpoint > 0 {
         logger::log_info("Creating final checkpoint...").await;
         

src/corporate/update_parallel.rs

@@ -0,0 +1,522 @@
+// src/corporate/update_parallel.rs
+// PARALLELIZED VERSION of build_companies_jsonl_streaming
+// 
+// Key improvements:
+// - Processes multiple companies concurrently using the ChromeDriverPool
+// - Maintains data safety with serialized log writes via channel
+// - Respects pool size limits via semaphore
+// - All fsync and checkpoint logic preserved
+
+use super::{types::*, yahoo::*};
+use crate::util::directories::DataPaths;
+use crate::util::logger;
+use crate::scraper::webdriver::ChromeDriverPool;
+
+use tokio::sync::mpsc;
+use tokio::io::AsyncWriteExt;
+use tokio::fs::OpenOptions;
+use std::collections::HashMap;
+use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
+use futures::stream::{FuturesUnordered, StreamExt};
+
+/// Represents a write command to be serialized through the log writer
+enum LogCommand {
+    Write(CompanyCrossPlatformInfo),
+    Checkpoint,
+    Shutdown,
+}
+
+/// Result from processing a single company
+struct CompanyProcessResult {
+    company: CompanyCrossPlatformInfo,
+    is_update: bool,
+}
+
+/// Abort-safe incremental JSONL persistence with atomic checkpoints (PARALLELIZED)
+/// 
+/// Implements the data_updating_rule.md specification with concurrent processing:
+/// - Append-only JSONL log for all updates
+/// - Batched fsync for performance (configurable batch size)
+/// - Time-based fsync for safety (max 10 seconds without fsync)
+/// - Atomic checkpoints via temp file + rename
+/// - Crash recovery by loading checkpoint + replaying log
+/// - Partial lines automatically ignored by .lines() iterator
+/// - PARALLEL processing of companies using ChromeDriverPool
+/// - Serialized log writes for data safety
+/// 
+/// # Parallelization Strategy
+/// 
+/// - Multiple companies processed concurrently (limited by pool size)
+/// - Each company's Yahoo lookups happen in parallel
+/// - Log writes are serialized through a channel
+/// - Pool's semaphore naturally limits concurrency
+/// - All fsync and checkpoint logic preserved
+pub async fn build_companies_jsonl_streaming_parallel(
+    paths: &DataPaths, 
+    pool: &Arc<ChromeDriverPool>,
+    shutdown_flag: &Arc<AtomicBool>,
+) -> anyhow::Result<usize> {
+    // Configuration constants
+    const CHECKPOINT_INTERVAL: usize = 50;
+    const FSYNC_BATCH_SIZE: usize = 10;
+    const FSYNC_INTERVAL_SECS: u64 = 10;
+    const CONCURRENCY_LIMIT: usize = 100; // Max companies processing at once
+    
+    let path = DataPaths::new(".")?;
+    let corporate_path = path.data_dir().join("corporate").join("by_name");
+    let securities_path = corporate_path.join("common_stocks.json");
+    
+    if !securities_path.exists() {
+        logger::log_warn("No common_stocks.json found").await;
+        return Ok(0);
+    }
+    
+    let content = tokio::fs::read_to_string(securities_path).await?;
+    let securities: HashMap<String, CompanyInfo> = serde_json::from_str(&content)?;
+    
+    let companies_path = paths.data_dir().join("companies.jsonl");
+    let log_path = paths.data_dir().join("companies_updates.log");
+    
+    if let Some(parent) = companies_path.parent() {
+        tokio::fs::create_dir_all(parent).await?;
+    }
+    
+    // === RECOVERY PHASE: Load checkpoint + replay log ===
+    let mut existing_companies: HashMap<String, CompanyCrossPlatformInfo> = HashMap::new();
+    let mut processed_names: std::collections::HashSet<String> = std::collections::HashSet::new();
+    
+    if companies_path.exists() {
+        logger::log_info("Loading checkpoint from companies.jsonl...").await;
+        let existing_content = tokio::fs::read_to_string(&companies_path).await?;
+        
+        for line in existing_content.lines() {
+            if line.trim().is_empty() {
+                continue;
+            }
+            
+            match serde_json::from_str::<CompanyCrossPlatformInfo>(line) {
+                Ok(company) => {
+                    processed_names.insert(company.name.clone());
+                    existing_companies.insert(company.name.clone(), company);
+                }
+                Err(e) => {
+                    logger::log_warn(&format!("Skipping invalid checkpoint line: {}", e)).await;
+                }
+            }
+        }
+        logger::log_info(&format!("Loaded checkpoint with {} companies", existing_companies.len())).await;
+    }
+    
+    if log_path.exists() {
+        logger::log_info("Replaying update log...").await;
+        let log_content = tokio::fs::read_to_string(&log_path).await?;
+        let mut replayed = 0;
+        
+        for line in log_content.lines() {
+            if line.trim().is_empty() {
+                continue;
+            }
+            
+            match serde_json::from_str::<CompanyCrossPlatformInfo>(line) {
+                Ok(company) => {
+                    processed_names.insert(company.name.clone());
+                    existing_companies.insert(company.name.clone(), company);
+                    replayed += 1;
+                }
+                Err(e) => {
+                    logger::log_warn(&format!("Skipping invalid log line: {}", e)).await;
+                }
+            }
+        }
+        if replayed > 0 {
+            logger::log_info(&format!("Replayed {} updates from log", replayed)).await;
+        }
+    }
+    
+    // === SETUP LOG WRITER TASK ===
+    // This task serializes all log writes to maintain data safety
+    let (write_tx, mut write_rx) = mpsc::channel::<LogCommand>(1000);
+    
+    let log_file_init = OpenOptions::new()
+        .create(true)
+        .append(true)
+        .open(&log_path)
+        .await?;
+    
+    let companies_path_clone = companies_path.clone();
+    let log_path_clone = log_path.clone();
+    let existing_companies_writer = Arc::new(tokio::sync::Mutex::new(existing_companies.clone()));
+    
+    let writer_task = tokio::spawn(async move {
+        let mut log_file = log_file_init; // Move into the task
+        let mut writes_since_fsync = 0;
+        let mut last_fsync = std::time::Instant::now();
+        let mut updates_since_checkpoint = 0;
+        let mut count = 0;
+        let mut new_count = 0;
+        let mut updated_count = 0;
+        
+        while let Some(cmd) = write_rx.recv().await {
+            match cmd {
+                LogCommand::Write(company) => {
+                    // Write to log
+                    let line = serde_json::to_string(&company).unwrap();
+                    if let Err(e) = log_file.write_all(line.as_bytes()).await {
+                        logger::log_error(&format!("Failed to write to log: {}", e)).await;
+                        break;
+                    }
+                    if let Err(e) = log_file.write_all(b"\n").await {
+                        logger::log_error(&format!("Failed to write newline: {}", e)).await;
+                        break;
+                    }
+                    
+                    writes_since_fsync += 1;
+                    updates_since_checkpoint += 1;
+                    count += 1;
+                    
+                    // Update in-memory state
+                    let mut existing_companies = existing_companies_writer.lock().await;
+                    let is_update = existing_companies.contains_key(&company.name);
+                    existing_companies.insert(company.name.clone(), company);
+                    drop(existing_companies);
+                    
+                    if is_update {
+                        updated_count += 1;
+                    } else {
+                        new_count += 1;
+                    }
+                    
+                    // Batched + time-based fsync
+                    let should_fsync = writes_since_fsync >= FSYNC_BATCH_SIZE 
+                        || last_fsync.elapsed().as_secs() >= FSYNC_INTERVAL_SECS;
+                    
+                    if should_fsync {
+                        if let Err(e) = log_file.flush().await {
+                            logger::log_error(&format!("Failed to flush: {}", e)).await;
+                            break;
+                        }
+                        if let Err(e) = log_file.sync_data().await {
+                            logger::log_error(&format!("Failed to fsync: {}", e)).await;
+                            break;
+                        }
+                        writes_since_fsync = 0;
+                        last_fsync = std::time::Instant::now();
+                    }
+                    
+                    // Periodic checkpoint
+                    if updates_since_checkpoint >= CHECKPOINT_INTERVAL {
+                        // Fsync pending writes before checkpoint
+                        if writes_since_fsync > 0 {
+                            let _ = log_file.flush().await;
+                            let _ = log_file.sync_data().await;
+                            writes_since_fsync = 0;
+                            last_fsync = std::time::Instant::now();
+                        }
+                        
+                        logger::log_info(&format!("Creating checkpoint at {} companies...", count)).await;
+                        
+                        let checkpoint_tmp = companies_path_clone.with_extension("jsonl.tmp");
+                        let mut checkpoint_file = match tokio::fs::File::create(&checkpoint_tmp).await {
+                            Ok(f) => f,
+                            Err(e) => {
+                                logger::log_error(&format!("Failed to create checkpoint: {}", e)).await;
+                                break;
+                            }
+                        };
+                        
+                        let existing_companies = existing_companies_writer.lock().await;
+                        for company in existing_companies.values() {
+                            let line = serde_json::to_string(company).unwrap();
+                            let _ = checkpoint_file.write_all(line.as_bytes()).await;
+                            let _ = checkpoint_file.write_all(b"\n").await;
+                        }
+                        drop(existing_companies);
+                        
+                        let _ = checkpoint_file.flush().await;
+                        let _ = checkpoint_file.sync_all().await;
+                        drop(checkpoint_file);
+                        
+                        let _ = tokio::fs::rename(&checkpoint_tmp, &companies_path_clone).await;
+                        
+                        // Clear log and reopen
+                        drop(log_file);
+                        let _ = tokio::fs::remove_file(&log_path_clone).await;
+                        
+                        // Reopen log file
+                        match OpenOptions::new()
+                            .create(true)
+                            .append(true)
+                            .open(&log_path_clone)
+                            .await {
+                                Ok(new_file) => {
+                                    log_file = new_file;
+                                    updates_since_checkpoint = 0;
+                                    logger::log_info("✓ Checkpoint created and log cleared").await;
+                                }
+                                Err(e) => {
+                                    logger::log_error(&format!("Failed to reopen log: {}", e)).await;
+                                    break;
+                                }
+                            }
+                    }
+                    
+                    if count % 10 == 0 {
+                        logger::log_info(&format!("Progress: {} companies ({} new, {} updated)", count, new_count, updated_count)).await;
+                    }
+                },
+                LogCommand::Checkpoint => {
+                    // Force checkpoint - this is the final checkpoint before shutdown
+                    if writes_since_fsync > 0 {
+                        let _ = log_file.flush().await;
+                        let _ = log_file.sync_data().await;
+                    }
+                    
+                    logger::log_info("Creating final checkpoint...").await;
+                    let checkpoint_tmp = companies_path_clone.with_extension("jsonl.tmp");
+                    if let Ok(mut checkpoint_file) = tokio::fs::File::create(&checkpoint_tmp).await {
+                        let existing_companies = existing_companies_writer.lock().await;
+                        for company in existing_companies.values() {
+                            let line = serde_json::to_string(company).unwrap();
+                            let _ = checkpoint_file.write_all(line.as_bytes()).await;
+                            let _ = checkpoint_file.write_all(b"\n").await;
+                        }
+                        drop(existing_companies);
+                        
+                        let _ = checkpoint_file.flush().await;
+                        let _ = checkpoint_file.sync_all().await;
+                        drop(checkpoint_file);
+                        let _ = tokio::fs::rename(&checkpoint_tmp, &companies_path_clone).await;
+                        
+                        // Clean up log file after final checkpoint
+                        drop(log_file);
+                        let _ = tokio::fs::remove_file(&log_path_clone).await;
+                        
+                        logger::log_info("✓ Final checkpoint created").await;
+                    }
+                    // After final checkpoint, exit the loop
+                    break;
+                },
+                LogCommand::Shutdown => {
+                    // Fsync any pending writes before exit
+                    if writes_since_fsync > 0 {
+                        logger::log_info(&format!("Fsyncing {} pending writes...", writes_since_fsync)).await;
+                        let _ = log_file.flush().await;
+                        let _ = log_file.sync_data().await;
+                    }
+                    break;
+                }
+            }
+        }
+        
+        (count, new_count, updated_count)
+    });
+    
+    // === PARALLEL COMPANY PROCESSING ===
+    logger::log_info(&format!("Processing companies in parallel (max {} concurrent, pool size: {})", 
+        CONCURRENCY_LIMIT, pool.get_number_of_instances())).await;
+    
+    let pool = pool.clone();
+    let shutdown_flag = shutdown_flag.clone();
+    
+    let mut processing_tasks = FuturesUnordered::new();
+    let mut pending_companies = Vec::new();
+    
+    // Collect companies to process
+    for (name, company_info) in securities.iter() {
+        if processed_names.contains(name) {
+            continue;
+        }
+        pending_companies.push((name.clone(), company_info.clone()));
+    }
+    
+    logger::log_info(&format!("Found {} companies to process", pending_companies.len())).await;
+    
+    // Process companies in chunks to limit memory usage
+    let chunk_size = CONCURRENCY_LIMIT;
+    let mut processed = 0;
+    
+    for chunk in pending_companies.chunks(chunk_size) {
+        if shutdown_flag.load(Ordering::SeqCst) {
+            break;
+        }
+        
+        // Launch tasks for this chunk
+        for (name, company_info) in chunk {
+            let name = name.clone();
+            let company_info = company_info.clone();
+            let pool = pool.clone();
+            let shutdown_flag = shutdown_flag.clone();
+            let existing_entry = existing_companies.get(&name).cloned();
+            
+            let task = tokio::spawn(async move {
+                process_single_company(
+                    name,
+                    company_info,
+                    existing_entry,
+                    &pool,
+                    &shutdown_flag
+                ).await
+            });
+            
+            processing_tasks.push(task);
+        }
+        
+        // Wait for chunk to complete
+        while let Some(result) = processing_tasks.next().await {
+            match result {
+                Ok(Ok(Some(company_result))) => {
+                    // Send to writer
+                    if write_tx.send(LogCommand::Write(company_result.company)).await.is_err() {
+                        logger::log_error("Writer task died, stopping processing").await;
+                        break;
+                    }
+                    processed += 1;
+                }
+                Ok(Ok(None)) => {
+                    // Company had no ISINs or was skipped
+                    processed += 1;
+                }
+                Ok(Err(e)) => {
+                    logger::log_warn(&format!("Company processing error: {}", e)).await;
+                    processed += 1;
+                }
+                Err(e) => {
+                    logger::log_error(&format!("Task panic: {}", e)).await;
+                    processed += 1;
+                }
+            }
+            
+            if shutdown_flag.load(Ordering::SeqCst) {
+                break;
+            }
+        }
+        
+        if shutdown_flag.load(Ordering::SeqCst) {
+            break;
+        }
+    }
+    
+    // Signal writer to finish
+    let _ = write_tx.send(LogCommand::Shutdown).await;
+    drop(write_tx);
+    
+    // Wait for writer to finish
+    let (final_count, final_new, final_updated) = writer_task.await
+        .unwrap_or((0, 0, 0));
+    
+    logger::log_info(&format!(
+        "Completed: {} total companies ({} new, {} updated)", 
+        final_count, final_new, final_updated
+    )).await;
+    
+    Ok(final_count)
+}
+
+/// Process a single company: fetch Yahoo data for its ISINs
+async fn process_single_company(
+    name: String,
+    company_info: CompanyInfo,
+    existing_entry: Option<CompanyCrossPlatformInfo>,
+    pool: &Arc<ChromeDriverPool>,
+    shutdown_flag: &Arc<AtomicBool>,
+) -> anyhow::Result<Option<CompanyProcessResult>> {
+    let is_update = existing_entry.is_some();
+    
+    let mut isin_tickers_map: HashMap<String, Vec<String>> = 
+        existing_entry
+            .as_ref()
+            .map(|e| e.isin_tickers_map.clone())
+            .unwrap_or_default();
+    
+    let mut sector = existing_entry.as_ref().and_then(|e| e.sector.clone());
+    let mut exchange = existing_entry.as_ref().and_then(|e| e.exchange.clone());
+    
+    // Collect unique ISIN-ticker pairs
+    let mut unique_isin_ticker_pairs: HashMap<String, Vec<String>> = HashMap::new();
+    
+    for figi_infos in company_info.securities.values() {
+        for figi_info in figi_infos {
+            if !figi_info.isin.is_empty() {
+                let tickers = unique_isin_ticker_pairs
+                    .entry(figi_info.isin.clone())
+                    .or_insert_with(Vec::new);
+                
+                if !figi_info.ticker.is_empty() && !tickers.contains(&figi_info.ticker) {
+                    tickers.push(figi_info.ticker.clone());
+                }
+            }
+        }
+    }
+    
+    // Process each ISIN (these Yahoo lookups will happen in parallel across companies)
+    for (isin, figi_tickers) in unique_isin_ticker_pairs {
+        if shutdown_flag.load(Ordering::SeqCst) {
+            break;
+        }
+
+        let tickers = isin_tickers_map
+            .entry(isin.clone())
+            .or_insert_with(Vec::new);
+        
+        for figi_ticker in figi_tickers {
+            if !tickers.contains(&figi_ticker) {
+                tickers.push(figi_ticker);
+            }
+        }
+        
+        let has_yahoo_ticker = tickers.iter().any(|t| t.starts_with("YAHOO:"));
+        
+        if !has_yahoo_ticker && !shutdown_flag.load(Ordering::SeqCst) {
+            logger::log_info(&format!("Fetching Yahoo details for {} (ISIN: {})", name, isin)).await;
+            
+            match scrape_company_details_by_isin(pool, &isin).await {
+                Ok(Some(details)) => {
+                    logger::log_info(&format!("✓ Found Yahoo ticker {} for ISIN {}", details.ticker, isin)).await;
+                    
+                    tickers.push(format!("YAHOO:{}", details.ticker));
+                    
+                    if sector.is_none() && details.sector.is_some() {
+                        sector = details.sector.clone();
+                        logger::log_info(&format!("  Sector: {}", details.sector.as_ref().unwrap())).await;
+                    }
+                    
+                    if exchange.is_none() && details.exchange.is_some() {
+                        exchange = details.exchange.clone();
+                        logger::log_info(&format!("  Exchange: {}", details.exchange.as_ref().unwrap())).await;
+                    }
+                },
+                Ok(None) => {
+                    logger::log_warn(&format!("◯ No search results for ISIN {}", isin)).await;
+                    tickers.push("YAHOO:NO_RESULTS".to_string());
+                },
+                Err(e) => {
+                    if shutdown_flag.load(Ordering::SeqCst) {
+                        break;
+                    }
+                    logger::log_warn(&format!("✗ Yahoo lookup error for ISIN {}: {}", isin, e)).await;
+                }
+            }
+        }
+    }
+    
+    if shutdown_flag.load(Ordering::SeqCst) {
+        return Ok(None);
+    }
+
+    if !isin_tickers_map.is_empty() {
+        let company_entry = CompanyCrossPlatformInfo {
+            name: name.clone(),
+            isin_tickers_map,
+            sector,
+            exchange,
+        };
+        
+        Ok(Some(CompanyProcessResult {
+            company: company_entry,
+            is_update,
+        }))
+    } else {
+        Ok(None)
+    }
+}

src/corporate/yahoo.rs

@@ -4,7 +4,7 @@ use crate::{scraper::webdriver::*, util::{directories::DataPaths}};
 use event_backtest_engine::logger;
 use fantoccini::{Client, Locator};
 use serde::{Deserialize, Serialize};
-use tokio::{time::{Duration as TokioDuration, sleep}};
+use tokio::time::{Duration as TokioDuration, sleep, timeout};
 use std::{sync::Arc};
 use anyhow::{anyhow, Result};
 
@@ -21,6 +21,16 @@ pub enum YahooTickerResult {
     AmbiguousResults,
 }
 
+#[derive(Debug, Deserialize)]
+pub struct ExtractionMetadata {
+    #[serde(rename = "selectedRowIndex")]
+    pub selected_row_index: usize,
+    #[serde(rename = "validFieldCount")]
+    pub valid_field_count: usize,
+    #[serde(rename = "totalRows")]
+    pub total_rows: usize,
+}
+
 #[derive(Debug, Deserialize)]
 pub struct ExtractionResult {
     status: String,
@@ -29,6 +39,8 @@ pub struct ExtractionResult {
     exchange: Option<String>,
     #[serde(default)]
     error_message: Option<String>,
+    #[serde(default)]
+    metadata: Option<ExtractionMetadata>,
 }
 
 impl YahooTickerResult {
@@ -73,28 +85,99 @@ pub async fn extract_company_details(
     client: &Client,
     _isin: &str,
 ) -> Result<Option<YahooCompanyDetails>> {
+    // Wait for page to load - look for either the table or the no-data element
+    let wait_result: Result<Result<bool, anyhow::Error>> = timeout(
+        TokioDuration::from_secs(30),
+        async {
+            for _ in 0..60 {
+                let has_content: bool = client
+                    .execute(
+                        r#"
+                        const table = document.querySelector('#main-content-wrapper > section > section.container.yf-1omxedn > div.tableContainer.yf-1omxedn > div > table');
+                        const noData = document.querySelector('#main-content-wrapper > section > div.noData.yf-1omxedn');
+                        return !!(table || noData);
+                        "#,
+                        vec![],
+                    )
+                    .await
+                    .map_err(|e| anyhow!("Execute error: {}", e))?
+                    .as_bool()
+                    .unwrap_or(false);
+
+                if has_content {
+                    return Ok(true);
+                }
+
+                sleep(TokioDuration::from_millis(500)).await;
+            }
+            Ok(false)
+        },
+    )
+    .await
+    .map_err(|_| anyhow!("Timeout waiting for Yahoo Finance page to load"));
+    
+    match wait_result {
+        Err(_) => {
+            return Err(anyhow!("Timeout waiting for Yahoo Finance page to load"));
+        },
+        Ok(Err(e)) => {
+            return Err(anyhow!("Error checking page content: {}", e));
+        },
+        Ok(Ok(false)) => {
+            logger::log_warn("Page content not found after waiting, attempting extraction anyway").await;
+        },
+        Ok(Ok(true)) => {
+            logger::log_info("Page content detected, proceeding with extraction").await;
+        }
+    }
+    
     // Execute the JavaScript extraction script
     let result = client.execute(YAHOO_COMPANY_EXTRACTION_JS, vec![]).await?;
     
+    // Log the raw result for debugging
+    logger::log_info(&format!("JavaScript extraction raw result: {:?}", result)).await;
+    
+    // Check if result is null
+    if result.is_null() {
+        return Err(anyhow!("JavaScript returned null - page may not be fully loaded or script failed"));
+    }
+    
     // Parse the JSON result
-    let extraction: ExtractionResult = serde_json::from_value(result)
-        .map_err(|e| anyhow!("Failed to parse extraction result: {}", e))?;
+    let extraction: ExtractionResult = serde_json::from_value(result.clone())
+        .map_err(|e| {
+            // Log the problematic result value for debugging
+            let result_str = serde_json::to_string_pretty(&result).unwrap_or_else(|_| format!("{:?}", result));
+            anyhow!("Failed to parse extraction result: {}. Raw result: {}", e, result_str)
+        })?;
     
     match extraction.status.as_str() {
         "found" => {
+            // Ticker is guaranteed to be present when status is "found"
+            // Sector and exchange are optional
             if let Some(ticker) = extraction.ticker {
+                // Log metadata if available
+                if let Some(ref metadata) = extraction.metadata {
+                    logger::log_info(&format!(
+                        "Selected row {} with {} valid fields out of {} total rows",
+                        metadata.selected_row_index,
+                        metadata.valid_field_count,
+                        metadata.total_rows
+                    )).await;
+                }
+                
                 Ok(Some(YahooCompanyDetails {
                     ticker,
                     sector: extraction.sector,
                     exchange: extraction.exchange,
                 }))
             } else {
-                Ok(None)
+                // This shouldn't happen if JS script is working correctly
+                Err(anyhow!("Status 'found' but no ticker present"))
             }
         },
         "no_results" => Ok(None),
-        "not_found" => Ok(None),
         "error" => {
+            // Error status means ticker was not found or extraction failed
             let error_msg = extraction.error_message.unwrap_or_else(|| "Unknown error".to_string());
             Err(anyhow!("JavaScript extraction error: {}", error_msg))
         },

src/corporate/yahoo_company_extraction.js

@@ -1,61 +1,137 @@
 // yahoo_company_extraction.js
 // JavaScript extraction script for Yahoo Finance company details
 // Used to extract ticker, sector, and exchange from Yahoo Finance search results
+// Only ticker is mandatory - sector and exchange are optional fields
 
-(function() {
+// Example selectors:
+// with results:
+// document.querySelector("#main-content-wrapper > section > section.container.yf-1omxedn > div.tableContainer.yf-1omxedn > div > table")
+// document.querySelector("#\\30  > td:nth-child(1) > span > div > a")
+// document.querySelector("#\\30  > td:nth-child(2) > span > div")
+// document.querySelector("#\\30  > td:nth-child(3) > span > div")
+// document.querySelector("#\\30  > td:nth-child(4) > span > div > a")
+// document.querySelector("#\\30  > td:nth-child(5) > span > div")
+// document.querySelector("#\\30  > td:nth-child(6) > span > div")
+// row with no result:
+// document.querySelector("#\\32  > td:nth-child(4) > span > p")
+// no results:
+// document.querySelector("#main-content-wrapper > section > div.noData.yf-1omxedn")
+
+// Using a wrapper to ensure the result is properly captured
+var extractionResult = (function() {
     try {
-        // Check for "No results found" message
-        const noDataElement = document.querySelector('.noData');
+        // Check for "No results found" message using exact selector
+        const noDataElement = document.querySelector('#main-content-wrapper > section > div.noData.yf-1omxedn');
         if (noDataElement) {
             return { status: 'no_results', ticker: null, sector: null, exchange: null };
         }
 
-        // Find the results table
-        const table = document.querySelector('table.markets-table');
+        // Find the results table using exact selector
+        const table = document.querySelector('#main-content-wrapper > section > section.container.yf-1omxedn > div.tableContainer.yf-1omxedn > div > table');
         if (!table) {
             return { status: 'no_results', ticker: null, sector: null, exchange: null };
         }
 
-        // Find the first row in tbody
-        const firstRow = table.querySelector('tbody tr');
-        if (!firstRow) {
+        // Find all rows in tbody
+        const allRows = table.querySelectorAll('tbody tr');
+        if (!allRows || allRows.length === 0) {
             return { status: 'no_results', ticker: null, sector: null, exchange: null };
         }
 
-        // Extract ticker from first column (td:nth-child(1))
-        const tickerCell = firstRow.querySelector('td:nth-child(1)');
-        const ticker = tickerCell ? tickerCell.textContent.trim() : '';
-
-        if (!ticker) {
-            return { status: 'not_found', ticker: null, sector: null, exchange: null };
+        // Helper function to safely extract text content
+        function extractText(element) {
+            if (!element) return '';
+            const text = element.textContent.trim();
+            return text;
         }
 
-        // Extract sector from column 4 (td:nth-child(4) > span > div > a)
-        const sectorCell = firstRow.querySelector('td:nth-child(4) span div a');
-        let sector = sectorCell ? sectorCell.textContent.trim() : '';
-        
-        // Normalize empty/invalid values to null
-        if (!sector || sector === '-' || sector === 'N/A') {
-            sector = null;
+        // Helper function to check if value is valid (not empty, not -, not N/A)
+        function isValidValue(value) {
+            if (!value) return false;
+            const normalized = value.trim().toLowerCase();
+            return normalized !== '' && normalized !== '-' && normalized !== 'n/a';
         }
 
-        // Extract exchange from column 6 (td:nth-child(6) > span)
-        const exchangeCell = firstRow.querySelector('td:nth-child(6) span');
-        let exchange = exchangeCell ? exchangeCell.textContent.trim() : '';
+        // Helper function to extract and normalize data from a row
+        function extractRowData(row) {
+            // Extract ticker from column 1 (td:nth-child(1) > span > div > a)
+            const tickerElement = row.querySelector('td:nth-child(1) > span > div > a') || 
+                                  row.querySelector('td:nth-child(1)');
+            const tickerRaw = extractText(tickerElement);
+            const ticker = isValidValue(tickerRaw) ? tickerRaw : null;
 
-        // Normalize empty/invalid values to null
-        if (!exchange || exchange === '-' || exchange === 'N/A') {
-            exchange = null;
+            // Extract sector from column 4 (td:nth-child(4) > span > div > a or td:nth-child(4) > span > div)
+            const sectorElement = row.querySelector('td:nth-child(4) > span > div > a') || 
+                                  row.querySelector('td:nth-child(4) > span > div') ||
+                                  row.querySelector('td:nth-child(4)');
+            const sectorRaw = extractText(sectorElement);
+            const sector = isValidValue(sectorRaw) ? sectorRaw : null;
+
+            // Extract exchange from column 6 (td:nth-child(6) > span > div)
+            const exchangeElement = row.querySelector('td:nth-child(6) > span > div') || 
+                                    row.querySelector('td:nth-child(6)');
+            const exchangeRaw = extractText(exchangeElement);
+            const exchange = isValidValue(exchangeRaw) ? exchangeRaw : null;
+
+            return { ticker, sector, exchange };
         }
 
+        // Helper function to count non-null fields (data completeness counter)
+        function countValidFields(data) {
+            let count = 0;
+            if (data.ticker) count++;
+            if (data.sector) count++;
+            if (data.exchange) count++;
+            return count;
+        }
+
+        // Extract data from all rows and find the one with most complete data
+        let bestRow = null;
+        let maxFieldCount = -1;
+        let rowIndex = 0;
+
+        for (const row of allRows) {
+            const data = extractRowData(row);
+            const fieldCount = countValidFields(data);
+            
+            // Select row with most valid data, or first row if tied
+            if (fieldCount > maxFieldCount) {
+                bestRow = data;
+                maxFieldCount = fieldCount;
+                bestRow.rowIndex = rowIndex;
+                bestRow.validFieldCount = fieldCount;
+            }
+            
+            rowIndex++;
+        }
+
+        // Ticker is mandatory - return error status if not found
+        if (!bestRow || !bestRow.ticker) {
+            return { 
+                status: 'error', 
+                error_message: 'No ticker found in any row',
+                ticker: null, 
+                sector: null, 
+                exchange: null 
+            };
+        }
+
+        // Return success with ticker (mandatory) and optional sector/exchange
+        // Include metadata about which row was selected and how many valid fields it had
         return {
             status: 'found',
-            ticker: ticker,
-            sector: sector,
-            exchange: exchange
+            ticker: bestRow.ticker,
+            sector: bestRow.sector,
+            exchange: bestRow.exchange,
+            metadata: {
+                selectedRowIndex: bestRow.rowIndex,
+                validFieldCount: bestRow.validFieldCount,
+                totalRows: allRows.length
+            }
         };
 
     } catch (error) {
+        // Only catch unexpected errors during extraction
         return {
             status: 'error',
             error_message: error.toString(),
@@ -65,3 +141,6 @@
         };
     }
 })();
+
+// Return the result explicitly
+return extractionResult;

src/main.rs

@@ -14,11 +14,27 @@ use util::directories::DataPaths;
 use util::{logger, opnv};
 use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, Ordering};
+use std::process::Command;
 
 #[tokio::main]
 async fn main() -> Result<()> {
+    let output = if cfg!(target_os = "windows") {
+        Command::new("cmd")
+            .args(["/C", "docker desktop start"])
+            .output()
+            .expect("failed to execute process")
+    } else {
+        Command::new("sh")
+            .arg("-c")
+            .arg("echo hello")
+            .output()
+            .expect("failed to execute process")
+    };
+    let _start_docker_desktop = output.stdout;
+    
     cleanup_all_proxy_containers().await.ok();
 
+
     let config = Config::load().map_err(|err| {
         eprintln!("Failed to load config: {}", err);
         err
@@ -40,7 +56,7 @@ async fn main() -> Result<()> {
     // === Step 1: Fetch VPNBook configs ===
     let proxy_pool: Option<Arc<DockerVpnProxyPool>> = if config.enable_vpn_rotation {
         logger::log_info("VPN Rotation Enabled – Fetching latest VPNBook configs").await;
-        let temp_pool = Arc::new(ChromeDriverPool::new_with_proxy_and_task_limit(config.max_parallel_instances, None, config.max_tasks_per_instance).await?);
+        let temp_pool = Arc::new(ChromeDriverPool::new_with_proxy_and_task_limit(config.max_parallel_instances, None, 1).await?);
         let (username, password, _files) = opnv::fetch_vpnbook_configs(&temp_pool, paths.cache_dir()).await?;
         logger::log_info(&format!("VPNBook credentials → User: {}", username)).await;
 

src/scraper/webdriver.rs

@@ -2,6 +2,9 @@
 
 use anyhow::{anyhow, Context, Result};
 use fantoccini::{Client, ClientBuilder};
+use rand::seq::{IndexedRandom, SliceRandom};
+use rand::rngs::ThreadRng;
+use rand::Rng; // for the RNG trait
 use serde_json::{Map, Value};
 use std::pin::Pin;
 use std::process::Stdio;
@@ -363,6 +366,7 @@ impl ChromeInstance {
     }
 
     fn chrome_args(&self) -> Map<String, Value> {
+        let user_agent = Self::chrome_user_agent();
         let mut args = vec![
             "--headless=new".to_string(),
             "--disable-gpu".to_string(),
@@ -372,14 +376,14 @@ impl ChromeInstance {
             "--disable-extensions".to_string(),
             "--disable-popup-blocking".to_string(),
             "--disable-notifications".to_string(),
-            "--disable-logging".to_string(),
+            //"--disable-logging".to_string(),
             "--disable-autofill".to_string(),
             "--disable-sync".to_string(),
             "--disable-default-apps".to_string(),
             "--disable-translate".to_string(),
-            "--window-size=1920,1080".to_string(),
+            //"--window-size=1920,1080".to_string(),
             "--disable-blink-features=AutomationControlled".to_string(),
-            "--user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36".to_string()
+            format!("--user-agent={}", user_agent),
         ];
         if let Some(ref proxy) = self.proxy_url {
             let proxy = proxy.clone();
@@ -397,6 +401,18 @@ impl ChromeInstance {
         });
         caps.as_object().cloned().unwrap()
     }
+
+
+    pub fn chrome_user_agent() -> &'static str {
+        static UAS: &[&str] = &[
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.6367.91 Safari/537.36",
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.122 Safari/537.36",
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.129 Safari/537.36",
+        ];
+
+        let mut rng = ThreadRng::default(); // non-deprecated RNG
+        *UAS.choose(&mut rng).unwrap()
+    }
 }
 
 fn parse_chromedriver_address(line: &str) -> Option<String> {