Merge pull request #31 from avast/feat/XxxResourceApp

feat: Add *ResourceApp trait to allow more generic applications

Author: jakubjanecek

bundle-monix-http4s-blaze/src/main/scala/com/avast/sst/bundle/MonixResourceApp.scala

@@ -0,0 +1,29 @@
+package com.avast.sst.bundle
+
+import cats.effect.{ExitCode, Resource}
+import monix.eval.{Task, TaskApp}
+import org.slf4j.LoggerFactory
+
+/** Extend this `trait` if you want to implement application using [[monix.eval.Task]] effect data type.
+  *
+  * Implement method `program` with initialization and business logic of your application. It will be automatically run and cleaned up.
+  */
+trait MonixResourceApp[A] extends TaskApp {
+
+  private val logger = LoggerFactory.getLogger(this.getClass)
+
+  def program: Resource[Task, A]
+
+  override def run(args: List[String]): Task[ExitCode] = {
+    program
+      .use(_ => Task.unit)
+      .redeem(
+        ex => {
+          logger.error("Application initialization failed!", ex)
+          ExitCode.Error
+        },
+        _ => ExitCode.Success
+      )
+  }
+
+}

bundle-zio-http4s-blaze/src/main/scala/com/avast/sst/bundle/ZioResourceApp.scala

@@ -0,0 +1,30 @@
+package com.avast.sst.bundle
+
+import cats.effect.Resource
+import org.slf4j.LoggerFactory
+import zio.interop.catz._
+import zio.{Task, ZIO}
+
+/** Extend this `trait` if you want to implement application using [[zio.ZIO]] effect data type.
+  *
+  * Implement method `program` with initialization and business logic of your application. It will be automatically run and cleaned up.
+  */
+trait ZioResourceApp[A] extends CatsApp {
+
+  private val logger = LoggerFactory.getLogger(this.getClass)
+
+  def program: Resource[Task, A]
+
+  override def run(args: List[String]): ZIO[Environment, Nothing, Int] = {
+    program
+      .use(_ => Task.unit)
+      .fold(
+        ex => {
+          logger.error("Application initialization failed!", ex)
+          1
+        },
+        _ => 0
+      )
+  }
+
+}