create BusInRabbitMQ

src/main/kotlin/eventDemo/libs/bus/BusInRabbitMQ.kt

@@ -0,0 +1,63 @@
+package eventDemo.libs.bus
+
+import com.rabbitmq.client.CancelCallback
+import com.rabbitmq.client.ConnectionFactory
+import com.rabbitmq.client.DeliverCallback
+import com.rabbitmq.client.Delivery
+import io.ktor.utils.io.core.toByteArray
+import kotlinx.coroutines.runBlocking
+
+class BusInRabbitMQ<E>(
+  private val connectionFactory: ConnectionFactory,
+  private val queueName: String,
+  private val objectToString: (E) -> String,
+  private val stringToObject: (String) -> E,
+) : Bus<E> {
+  init {
+    connectionFactory
+      .newConnection()
+      .createChannel()
+      .use {
+        it.queueDeclare(
+          queueName,
+          true,
+          false,
+          false,
+          emptyMap(),
+        )
+      }
+  }
+
+  override suspend fun publish(item: E) {
+    connectionFactory
+      .newConnection()
+      .createChannel()
+      .use {
+        it.basicPublish(
+          "",
+          queueName,
+          null,
+          objectToString(item).toByteArray(),
+        )
+      }
+  }
+
+  override fun subscribe(
+    priority: Int,
+    block: suspend (E) -> Unit,
+  ) {
+    connectionFactory
+      .newConnection()
+      .createChannel()
+      .basicConsume(
+        queueName,
+        true,
+        DeliverCallback { _: String, message: Delivery ->
+          runBlocking {
+            block(stringToObject(message.body.toString(Charsets.UTF_8)))
+          }
+        },
+        CancelCallback {},
+      )
+  }
+}