Fix/fix event 1216 (#1191)

Signed-off-by: loverustfs <hello@rustfs.com>
Co-authored-by: loverustfs <hello@rustfs.com>

crates/config/src/notify/mod.rs

@@ -24,13 +24,33 @@ pub use webhook::*;
 
 use crate::DEFAULT_DELIMITER;
 
-// --- Configuration Constants ---
+/// Default target identifier for notifications,
+/// Used in notification system when no specific target is provided,
+/// Represents the default target stream or endpoint for notifications when no specific target is provided.
 pub const DEFAULT_TARGET: &str = "1";
-
+/// Notification prefix for routing and identification,
+/// Used in notification system,
+/// This prefix is utilized in constructing routes and identifiers related to notifications within the system.
 pub const NOTIFY_PREFIX: &str = "notify";
 
+/// Notification route prefix combining the notification prefix and default delimiter
+/// Combines the notification prefix with the default delimiter
+/// Used in notification system for defining routes related to notifications.
+/// Example: "notify:/"
 pub const NOTIFY_ROUTE_PREFIX: &str = const_str::concat!(NOTIFY_PREFIX, DEFAULT_DELIMITER);
 
+/// Name of the environment variable that configures target stream concurrency.
+/// Controls how many target streams are processed in parallel by the notification system.
+/// Defaults to [`DEFAULT_NOTIFY_TARGET_STREAM_CONCURRENCY`] if not set.
+/// Example: `RUSTFS_NOTIFY_TARGET_STREAM_CONCURRENCY=20`.
+pub const ENV_NOTIFY_TARGET_STREAM_CONCURRENCY: &str = "RUSTFS_NOTIFY_TARGET_STREAM_CONCURRENCY";
+
+/// Default concurrency for target stream processing in the notification system
+/// This value is used if the environment variable `RUSTFS_NOTIFY_TARGET_STREAM_CONCURRENCY` is not set.
+/// It defines how many target streams can be processed in parallel by the notification system at any given time.
+/// Adjust this value based on your system's capabilities and expected load.
+pub const DEFAULT_NOTIFY_TARGET_STREAM_CONCURRENCY: usize = 20;
+
 #[allow(dead_code)]
 pub const NOTIFY_SUB_SYSTEMS: &[&str] = &[NOTIFY_MQTT_SUB_SYS, NOTIFY_WEBHOOK_SUB_SYS];
 

crates/config/src/notify/store.rs

@@ -15,5 +15,5 @@
 pub const DEFAULT_EXT: &str = ".unknown"; // Default file extension
 pub const COMPRESS_EXT: &str = ".snappy"; // Extension for compressed files
 
-/// STORE_EXTENSION - file extension of an event file in store
-pub const STORE_EXTENSION: &str = ".event";
+/// NOTIFY_STORE_EXTENSION - file extension of an event file in store
+pub const NOTIFY_STORE_EXTENSION: &str = ".event";