diff --git a/Cargo.lock b/Cargo.lock
index b80e97a..2604f19 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -26,6 +26,21 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.86"
@@ -228,6 +243,26 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "chrono"
+version = "0.4.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
+dependencies = [
+ "android-tzdata",
+ "iana-time-zone",
+ "js-sys",
+ "num-traits",
+ "wasm-bindgen",
+ "windows-targets 0.52.6",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.13"
@@ -243,6 +278,41 @@ version = "0.8.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "22ec99545bb0ed0ea7bb9b8e1e9122ea386ff8a48c0922e43f36d45ab09e0e80"
 
+[[package]]
+name = "darling"
+version = "0.20.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83b2eb4d90d12bdda5ed17de686c2acb4c57914f8f921b8da7e112b5a36f3fe1"
+dependencies = [
+ "darling_core",
+ "darling_macro",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.20.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622687fe0bac72a04e5599029151f5796111b90f1baaa9b544d807a5e31cd120"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.20.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "733cabb43482b1a1b53eee8583c2b9e8684d592215ea83efd305dd31bc2f0178"
+dependencies = [
+ "darling_core",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "deranged"
 version = "0.3.11"
@@ -252,12 +322,45 @@ dependencies = [
  "powerfmt",
 ]
 
+[[package]]
+name = "derive_builder"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0350b5cb0331628a5916d6c5c0b72e97393b8b6b03b47a9284f4e7f5a405ffd7"
+dependencies = [
+ "derive_builder_macro",
+]
+
+[[package]]
+name = "derive_builder_core"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d48cda787f839151732d396ac69e3473923d54312c070ee21e9effcaa8ca0b1d"
+dependencies = [
+ "darling",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "derive_builder_macro"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206868b8242f27cecce124c19fd88157fbd0dd334df2587f36417bafbc85097b"
+dependencies = [
+ "derive_builder_core",
+ "syn",
+]
+
 [[package]]
 name = "ecosystem"
 version = "0.1.0"
 dependencies = [
  "anyhow",
  "axum 0.7.5",
+ "chrono",
+ "derive_builder",
  "once_cell",
  "opentelemetry",
  "opentelemetry-otlp",
@@ -590,6 +693,35 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7ffbb5a1b541ea2561f8c41c087286cc091e21e556a4f09a8f6cbf17b69b141"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "windows-core",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "ident_case"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
+
 [[package]]
 name = "indexmap"
 version = "1.9.3"
@@ -1127,6 +1259,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "syn"
 version = "2.0.68"
@@ -1543,6 +1681,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows-core"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
+dependencies = [
+ "windows-targets 0.52.6",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.48.0"
diff --git a/Cargo.toml b/Cargo.toml
index fc7abc0..54453f0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,6 +21,8 @@ tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 
 [dev-dependencies]
 axum = { version = "0.7.5", features = ["http2", "query", "tracing"] }
+chrono = "0.4.38"
+derive_builder = "0.20.0"
 rand = "0.8.5"
 serde = { version = "1.0.203", features = ["derive"] }
 serde_json = "1.0.120"
diff --git a/examples/builder.rs b/examples/builder.rs
new file mode 100644
index 0000000..bd0f795
--- /dev/null
+++ b/examples/builder.rs
@@ -0,0 +1,78 @@
+use anyhow::Result;
+use chrono::{DateTime, Utc};
+use derive_builder::Builder;
+
+#[allow(unused)]
+#[derive(Debug, Clone)]
+enum Sensor {
+    Temperature,
+    Pressure,
+    Humidity,
+    Lightning,
+    Vibration,
+    Smoke,
+}
+
+#[allow(unused)]
+#[derive(Builder, Debug)]
+#[builder(setter(into))]
+struct Device {
+    id: u64,
+
+    name: String,
+
+    device_type: Sensor,
+
+    #[builder(setter(custom))]
+    create_date: DateTime<Utc>,
+
+    #[builder(setter(skip), default = "self.running_time_default()")]
+    running_time: u64,
+
+    #[builder(default, setter(into, strip_option))]
+    location: Option<String>,
+
+    #[builder(default = "true")]
+    is_active: bool,
+
+    #[builder(default = "vec![]", setter(each(name = "data_value")))]
+    data: Vec<String>,
+}
+
+fn main() -> Result<()> {
+    let device = Device::builder()
+        .id("29388844402912".parse::<u64>()?)
+        .name("temperature sensor")
+        .device_type(Sensor::Temperature)
+        .create_date("2024-07-01T12:34:56Z")
+        .data_value("30.3".into())
+        .data_value("26.8".into())
+        .build()?;
+
+    println!("{:#?}", device);
+
+    Ok(())
+}
+
+impl Device {
+    pub fn builder() -> DeviceBuilder {
+        DeviceBuilder::default()
+    }
+}
+
+impl DeviceBuilder {
+    pub fn create_date(&mut self, value: &str) -> &mut Self {
+        self.create_date = value.parse::<DateTime<Utc>>().ok();
+        self
+    }
+
+    fn running_time_default(&self) -> u64 {
+        match self.create_date {
+            Some(date) => {
+                let time = Utc::now() - date;
+                time.num_days() as u64
+            }
+            None => 0,
+        }
+    }
+}