diff --git a/Cargo.lock b/Cargo.lock
index 1e5a95f..a95fd99 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,11 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "arc-swap"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b585a98a234c46fc563103e9278c9391fde1f4e6850334da895d27edb9580f62"
+
 [[package]]
 name = "argparse"
 version = "0.2.2"
@@ -104,6 +110,17 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "chrono"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80094f509cf8b5ae86a4966a39b3ff66cd7e2a3e594accec3743ff3fabeab5b2"
+dependencies = [
+ "num-integer",
+ "num-traits",
+ "time",
+]
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
@@ -371,6 +388,15 @@ dependencies = [
  "tokio-util",
 ]
 
+[[package]]
+name = "hermit-abi"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61565ff7aaace3525556587bd2dc31d4a07071957be715e63ce7b1eccf51a8f4"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "hmac"
 version = "0.7.1"
@@ -494,10 +520,12 @@ name = "keeprunningd"
 version = "0.1.0"
 dependencies = [
  "argparse",
+ "chrono",
  "dingtalk",
  "rust_util",
  "serde",
  "serde_json",
+ "tokio",
 ]
 
 [[package]]
@@ -572,12 +600,35 @@ dependencies = [
  "kernel32-sys",
  "libc",
  "log",
- "miow",
+ "miow 0.2.1",
  "net2",
  "slab",
  "winapi 0.2.8",
 ]
 
+[[package]]
+name = "mio-named-pipes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5e374eff525ce1c5b7687c4cef63943e7686524a387933ad27ca7ec43779cb3"
+dependencies = [
+ "log",
+ "mio",
+ "miow 0.3.3",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "mio-uds"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "afcb699eb26d4332647cc848492bbc15eafb26f08d0304550d5aa1f612e066f0"
+dependencies = [
+ "iovec",
+ "libc",
+ "mio",
+]
+
 [[package]]
 name = "miow"
 version = "0.2.1"
@@ -590,6 +641,16 @@ dependencies = [
  "ws2_32-sys",
 ]
 
+[[package]]
+name = "miow"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "396aa0f2003d7df8395cb93e09871561ccc3e785f0acb369170e8cc74ddf9226"
+dependencies = [
+ "socket2",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "native-tls"
 version = "0.2.4"
@@ -619,6 +680,35 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
+[[package]]
+name = "num-integer"
+version = "0.1.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f6ea62e9d81a77cd3ee9a2a5b9b609447857f3d358704331e4ef39eb247fcba"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c62be47e61d1842b9170f0fdeec8eba98e60e90e5446449a0545e5152acd7096"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "num_cpus"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -958,6 +1048,16 @@ dependencies = [
  "opaque-debug",
 ]
 
+[[package]]
+name = "signal-hook-registry"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94f478ede9f64724c5d173d7bb56099ec3e2d9fc2774aac65d34b8b890405f41"
+dependencies = [
+ "arc-swap",
+ "libc",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.2"
@@ -970,6 +1070,18 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c7cb5678e1615754284ec264d9bb5b4c27d2018577fd90ac0ceb578591ed5ee4"
 
+[[package]]
+name = "socket2"
+version = "0.3.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03088793f677dce356f3ccc2edb1b314ad191ab702a5de3faf49304f7e104918"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "subtle"
 version = "1.0.0"
@@ -1043,10 +1155,28 @@ dependencies = [
  "futures-core",
  "iovec",
  "lazy_static",
+ "libc",
  "memchr",
  "mio",
+ "mio-named-pipes",
+ "mio-uds",
+ "num_cpus",
  "pin-project-lite",
+ "signal-hook-registry",
  "slab",
+ "tokio-macros",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0c3acc6aa564495a0f2e1d59fab677cd7f81a19994cfc7f3ad0e64301560389"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index fbf7973..1f6402f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,9 +7,11 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+tokio = { version = "0.2.6", features = ["full"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 argparse = "0.2.2"
 rust_util = "0.2.4"
 dingtalk = "1.3.2"
-
+chrono = "0.4.11"
+# log = "0.4.8"
diff --git a/keeprunningd.json b/keeprunningd.json
new file mode 100644
index 0000000..04e8029
--- /dev/null
+++ b/keeprunningd.json
@@ -0,0 +1,10 @@
+{
+  "check_inverval_secs": 1,
+  "show_debug_output": true,
+  "notify_token": "------------",
+  "items": [{
+    "grep_tokens": ["java", "app"],
+    "title": "check java"
+  }]
+}
+
diff --git a/src/main.rs b/src/main.rs
index 45bc743..c4f731a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,9 +1,23 @@
-use std::process::Command;
+use std::{
+    fs,
+    panic,
+    thread,
+    time::Duration,
+    process::Command,
+    sync::Arc,
+};
+use chrono::prelude::*;
 use serde::{ Deserialize, Serialize, };
-use rust_util::util_msg::{ print_info, print_error, };
+use rust_util::{
+    util_file::locate_file,
+    util_msg::{ print_info, print_error, print_debug, }
+};
+use dingtalk::DingTalk;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 struct KeepRunningConfig {
+    check_inverval_secs: Option<u64>,
+    show_debug_output: Option<bool>,
     notify_token: String,
     items: Vec<KeepRunningConfigItem>,
 }
@@ -15,18 +29,91 @@ struct KeepRunningConfigItem {
 }
 
 fn main() {
-    print_info("Start run: ps aux");
-    let output_str = match ps_aux() {
-        Some(output_str) => output_str, None => return,
-    };
-    let lines = read_str_to_lines(&output_str);
+    panic::set_hook(Box::new(|panic_info| {
+        print_error(&format!("Panic in running keeprunningd: {:?}", panic_info));
+    }));
 
-    // println!("{}", output_str);
-    // for ln in &lines {
-    //     println!(">>>>>>> {}", ln);
-    // }
-    println!("{:?}", lines.iter().filter(|ln| ln.contains("java") && ln.contains("aaa")).collect::<Vec<_>>());
-    println!("{}", lines.len());
+    let config_file_opt = locate_file(&[
+        "keeprunningd.json".into(),
+        "~/keeprunningd.json".into(),
+        "/etc/keeprunningd.json".into()
+    ]);
+
+    let config_file = match config_file_opt {
+        None => {
+            print_error("Cannot find config file!");
+            return;
+        },
+        Some(config_file) => {
+            print_info(&format!("Find config file: {:?}", &config_file));
+            config_file
+        },
+    };
+
+    let config_file_content = match fs::read_to_string(&config_file) {
+        Ok(c) => c, Err(err) => {
+            print_error(&format!("Read config file {:?}, error: {}", &config_file, err));
+            return;
+        },
+    };
+
+    let keep_running_config: KeepRunningConfig = match serde_json::from_str(&config_file_content) {
+        Ok(c) => c, Err(err) => {
+            print_error(&format!("Parse config file: {:?}, error: {}", &config_file, err));
+            return;
+        },
+    };
+
+    if keep_running_config.show_debug_output.unwrap_or(false) {
+        if let Ok(json) = serde_json::to_string_pretty(&keep_running_config) {
+            print_debug(&format!("Config: {}", json));
+        }
+    }
+
+    let keep_running_config: Arc<KeepRunningConfig> = Arc::new(keep_running_config);
+    for check_cnt in 0.. {
+        print_info(&format!("Check index: {} @{:?}", check_cnt, Local::now()));
+        keep_runningd(keep_running_config.clone());
+        thread::sleep(Duration::from_secs(keep_running_config.check_inverval_secs.unwrap_or(60 * 60)));
+    }
+}
+
+fn keep_runningd(keep_running_config: Arc<KeepRunningConfig>) {
+    let t = thread::spawn(move || {
+        let ps_aux_lines = read_str_to_lines(&match ps_aux() { Some(p) => p, None => return, });
+        for keep_running_config_item in &keep_running_config.items {
+            let check_lines = ps_aux_lines.iter().filter(|ln| {
+                keep_running_config_item.grep_tokens.iter().all(|t| ln.contains(t))
+            }).collect::<Vec<_>>();
+            if check_lines.is_empty() { // if check fail!
+                print_info("Send DingTalk notification!");
+                use tokio::runtime;
+                match runtime::Builder::new().basic_scheduler().enable_all().build() {
+                    Err(err) => print_error(&format!("Prepare tokio runtime error: {}", err)),
+                    Ok(mut rt) => {
+                        let mut sb = String::with_capacity(1024);
+                        sb.push_str(&format!("Check failed: {}", &keep_running_config_item.title));
+                        sb.push_str(&format!("\ncheck time: {:?}", Local::now()));
+                        rt.block_on(send_notify(&keep_running_config.notify_token, &sb));
+                    },
+                }
+            } else if keep_running_config.show_debug_output.unwrap_or(false) {
+                print_debug(&format!("Find: {:?}", &check_lines));
+            }
+        }
+    });
+    if let Err(err) = t.join() {
+        print_error(&format!("Join check thread error: {:?}", err));
+    }
+}
+
+async fn send_notify(notify_token: &str, text: &str) {
+    match DingTalk::from_token(&notify_token) {
+        Err(err) => print_error(&format!("Prepare DingTalk error: {}", err)),
+        Ok(dt) => if let Err(err) = dt.send_text(text).await {
+            print_error(&format!("Send DingTalk message error: {}", err));
+        },
+    }
 }
 
 fn ps_aux() -> Option<String> {
@@ -39,16 +126,17 @@ fn ps_aux() -> Option<String> {
         },
     };
     match String::from_utf8(output.stdout) {
-        Ok(output_str) => Some(output_str), Err(err) => {
+        Ok(output_str) => Some(output_str),
+        Err(err) => {
             print_error(&format!("Get ps output as utf8 error: {}", err));
-            return None;
+            None
         },
     }
 }
 
+/// Split string to lines, splited by '\r', '\n' or "\r\n"
 fn read_str_to_lines(s: &str) -> Vec<String> {
     let mut r = vec![];
-
     let mut line = String::new();
     let mut cs = s.chars();
     while let Some(c) = cs.next() {
@@ -64,6 +152,8 @@ fn read_str_to_lines(s: &str) -> Vec<String> {
                     } else {
                         line.push(nc);
                     }
+                } else {
+                    break;
                 }
             }
         } else {