diff --git a/taskbus/README.md b/taskbus/README.md
index 3a167ca..2ab6e9e 100644
--- a/taskbus/README.md
+++ b/taskbus/README.md
@@ -1,2 +1,13 @@
 # taskbus
+
 A task distribution, which assign tasks to specific executors
+
+## How to use
+
+Just view tests in [`test`](src/test/java) folder for example.
+
+## Caution
+
+This project is just demo a simple task distribution.
+In production there will be more complicated cases that you need to handle, like executor type,
+monitor, etc.
diff --git a/taskbus/build.gradle.kts b/taskbus/build.gradle.kts
index e6eecba..0d6c1f0 100644
--- a/taskbus/build.gradle.kts
+++ b/taskbus/build.gradle.kts
@@ -1,19 +1,40 @@
 plugins {
-    id("java")
+    java
+    idea
 }
 
 group = "com.miti99"
 version = "1.0-SNAPSHOT"
 
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(21))
+    }
+}
+
+idea {
+    module {
+        isDownloadJavadoc = true
+        isDownloadSources = true
+    }
+}
+
 repositories {
     mavenCentral()
 }
 
 dependencies {
-    testImplementation(platform("org.junit:junit-bom:5.10.0"))
+    annotationProcessor("org.projectlombok:lombok:1.18.36")
+    compileOnly("org.projectlombok:lombok:1.18.36")
+
+    implementation("org.slf4j:slf4j-simple:2.0.16")
+
+    testAnnotationProcessor("org.projectlombok:lombok:1.18.36")
+    testCompileOnly("org.projectlombok:lombok:1.18.36")
+    testImplementation(platform("org.junit:junit-bom:5.11.4"))
     testImplementation("org.junit.jupiter:junit-jupiter")
 }
 
 tasks.test {
     useJUnitPlatform()
-}
\ No newline at end of file
+}
diff --git a/taskbus/src/main/java/com/miti99/Main.java b/taskbus/src/main/java/com/miti99/Main.java
deleted file mode 100644
index 540f964..0000000
--- a/taskbus/src/main/java/com/miti99/Main.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.miti99;
-
-public class Main {
-    public static void main(String[] args) {
-        System.out.println("Hello, World!");
-    }
-}
\ No newline at end of file
diff --git a/taskbus/src/main/java/com/miti99/taskbus/bus/Bus.java b/taskbus/src/main/java/com/miti99/taskbus/bus/Bus.java
new file mode 100644
index 0000000..9eb9b8d
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/bus/Bus.java
@@ -0,0 +1,7 @@
+package com.miti99.taskbus.bus;
+
+import com.miti99.taskbus.task.Task;
+
+public interface Bus {
+  void submit(Task task);
+}
diff --git a/taskbus/src/main/java/com/miti99/taskbus/bus/impl/ManualBus.java b/taskbus/src/main/java/com/miti99/taskbus/bus/impl/ManualBus.java
new file mode 100644
index 0000000..13f3682
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/bus/impl/ManualBus.java
@@ -0,0 +1,29 @@
+package com.miti99.taskbus.bus.impl;
+
+import com.miti99.taskbus.bus.Bus;
+import com.miti99.taskbus.task.Task;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class ManualBus implements Bus {
+  private final ExecutorService[] executors;
+  private final int poolSize;
+
+  public ManualBus(int poolSize) {
+    this.poolSize = poolSize;
+    executors = new ExecutorService[poolSize];
+    for (int i = 0; i < poolSize; i++) {
+      executors[i] = Executors.newSingleThreadExecutor();
+    }
+  }
+
+  public ManualBus() {
+    this(Runtime.getRuntime().availableProcessors());
+  }
+
+  @Override
+  public void submit(Task task) {
+    int executorId = task.hash() % poolSize;
+    executors[executorId].submit(task::execute);
+  }
+}
diff --git a/taskbus/src/main/java/com/miti99/taskbus/bus/impl/NormalBus.java b/taskbus/src/main/java/com/miti99/taskbus/bus/impl/NormalBus.java
new file mode 100644
index 0000000..9549faa
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/bus/impl/NormalBus.java
@@ -0,0 +1,16 @@
+package com.miti99.taskbus.bus.impl;
+
+import com.miti99.taskbus.bus.Bus;
+import com.miti99.taskbus.task.Task;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class NormalBus implements Bus {
+  private final ExecutorService executors =
+      Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
+
+  @Override
+  public void submit(Task task) {
+    executors.submit(task::execute);
+  }
+}
diff --git a/taskbus/src/main/java/com/miti99/taskbus/task/Task.java b/taskbus/src/main/java/com/miti99/taskbus/task/Task.java
new file mode 100644
index 0000000..d808f95
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/task/Task.java
@@ -0,0 +1,7 @@
+package com.miti99.taskbus.task;
+
+public interface Task {
+  int hash();
+
+  void execute();
+}
diff --git a/taskbus/src/main/java/com/miti99/taskbus/task/event/Event.java b/taskbus/src/main/java/com/miti99/taskbus/task/event/Event.java
new file mode 100644
index 0000000..56e3d03
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/task/event/Event.java
@@ -0,0 +1,12 @@
+package com.miti99.taskbus.task.event;
+
+import com.miti99.taskbus.task.Task;
+
+public interface Event extends Task {
+  int userId();
+
+  @Override
+  default int hash() {
+    return userId();
+  }
+}
diff --git a/taskbus/src/main/java/com/miti99/taskbus/task/event/UserLoginEvent.java b/taskbus/src/main/java/com/miti99/taskbus/task/event/UserLoginEvent.java
new file mode 100644
index 0000000..919f85e
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/task/event/UserLoginEvent.java
@@ -0,0 +1,12 @@
+package com.miti99.taskbus.task.event;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public record UserLoginEvent(int userId) implements Event {
+
+  @Override
+  public void execute() {
+    log.info("User {} logged in", userId);
+  }
+}
diff --git a/taskbus/src/main/java/com/miti99/taskbus/task/request/Request.java b/taskbus/src/main/java/com/miti99/taskbus/task/request/Request.java
new file mode 100644
index 0000000..e75efc2
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/task/request/Request.java
@@ -0,0 +1,12 @@
+package com.miti99.taskbus.task.request;
+
+import com.miti99.taskbus.task.Task;
+
+public interface Request extends Task {
+  int userId();
+
+  @Override
+  default int hash() {
+    return userId();
+  }
+}
diff --git a/taskbus/src/main/java/com/miti99/taskbus/task/request/SendMessageRequest.java b/taskbus/src/main/java/com/miti99/taskbus/task/request/SendMessageRequest.java
new file mode 100644
index 0000000..ca234ea
--- /dev/null
+++ b/taskbus/src/main/java/com/miti99/taskbus/task/request/SendMessageRequest.java
@@ -0,0 +1,12 @@
+package com.miti99.taskbus.task.request;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public record SendMessageRequest(int userId, String message) implements Request {
+
+  @Override
+  public void execute() {
+    log.info("User {} sent message: {}", userId, message);
+  }
+}
diff --git a/taskbus/src/test/java/com/miti99/taskbus/bus/impl/BusTest.java b/taskbus/src/test/java/com/miti99/taskbus/bus/impl/BusTest.java
new file mode 100644
index 0000000..6a6846c
--- /dev/null
+++ b/taskbus/src/test/java/com/miti99/taskbus/bus/impl/BusTest.java
@@ -0,0 +1,24 @@
+package com.miti99.taskbus.bus.impl;
+
+import com.miti99.taskbus.bus.Bus;
+import com.miti99.taskbus.task.event.UserLoginEvent;
+import com.miti99.taskbus.task.request.SendMessageRequest;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public abstract class BusTest {
+  private final Bus bus;
+
+  void submitTasks() {
+    bus.submit(new UserLoginEvent(1));
+    bus.submit(new SendMessageRequest(1, "msg1"));
+    bus.submit(new SendMessageRequest(1, "msg2"));
+    bus.submit(new UserLoginEvent(2));
+    bus.submit(new SendMessageRequest(2, "msg1"));
+    bus.submit(new SendMessageRequest(2, "msg2"));
+    bus.submit(new SendMessageRequest(1, "msg3"));
+    bus.submit(new SendMessageRequest(1, "msg4"));
+    bus.submit(new SendMessageRequest(2, "msg3"));
+    bus.submit(new SendMessageRequest(2, "msg4"));
+  }
+}
diff --git a/taskbus/src/test/java/com/miti99/taskbus/bus/impl/ManualBusTest.java b/taskbus/src/test/java/com/miti99/taskbus/bus/impl/ManualBusTest.java
new file mode 100644
index 0000000..2f8fd2a
--- /dev/null
+++ b/taskbus/src/test/java/com/miti99/taskbus/bus/impl/ManualBusTest.java
@@ -0,0 +1,15 @@
+package com.miti99.taskbus.bus.impl;
+
+import org.junit.jupiter.api.Test;
+
+class ManualBusTest extends BusTest {
+
+  public ManualBusTest() {
+    super(new ManualBus());
+  }
+
+  @Test
+  void runTest() {
+    submitTasks();
+  }
+}
diff --git a/taskbus/src/test/java/com/miti99/taskbus/bus/impl/NormalBusTest.java b/taskbus/src/test/java/com/miti99/taskbus/bus/impl/NormalBusTest.java
new file mode 100644
index 0000000..0bb0d42
--- /dev/null
+++ b/taskbus/src/test/java/com/miti99/taskbus/bus/impl/NormalBusTest.java
@@ -0,0 +1,17 @@
+package com.miti99.taskbus.bus.impl;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+class NormalBusTest extends BusTest {
+
+  public NormalBusTest() {
+    super(new NormalBus());
+  }
+
+  @Test
+  void runTest() {
+    submitTasks();
+  }
+}