Add scala implementation

manual.md

@@ -124,6 +124,25 @@ $ sudo journalctl -f -u isu-node
 
 などで見ることができます。
 
+#### Scalaへの切り替え方
+
+起動する実装をScala(Play 2.6)に切り替えるには、以下の操作を行います。
+
+```
+$ sudo systemctl stop isu-ruby
+$ sudo systemctl start isu-scala
+```
+
+プログラムの詳しい起動方法は、 /etc/systemd/system/isu-scala.service を参照してください。
+
+エラーなどの出力については、
+
+```
+$ sudo journalctl -f -u isu-scala
+```
+
+などで見ることができます。
+
 ### MySQL
 
 3306番ポートでMySQLが起動しています。初期状態では以下のユーザが設定されています。

provisioning/image/ansible/04_xbuild.yml

@@ -53,3 +53,35 @@
       copy: src=../files/etc/php/7.0/fpm/pool.d/www.conf dest=/etc/php/7.0/fpm/pool.d/www.conf owner=root mode=644
     - name: stop php-fpm
       service: name=php7.0-fpm state=stopped enabled=yes
+
+# install java8 and sbt
+- hosts: guests:extras
+  become: yes
+  gather_facts: no
+  tasks:
+    - name: Apt add bintray and jessie-backports
+      apt_repository: repo="{{item}}"
+      with_items:
+        - deb http://http.debian.net/debian jessie-backports main
+        - deb https://dl.bintray.com/sbt/debian /
+      tags: sbt
+    - name: Apt add key
+      apt_key:
+        keyserver: hkp://keyserver.ubuntu.com:80
+        id: 2EE0EA64E40A89B84B2DF73499E82A75642AC823
+      tags: sbt
+    - name: Install jre
+      apt:
+        update_cache: yes
+        default_release: jessie-backports
+        name: "{{item}}"
+      with_items:
+        - openjdk-8-jre-headless
+        - ca-certificates-java
+      tags: sbt
+    - name: Install jdk and sbt
+      apt: name="{{item}}"
+      with_items:
+        - openjdk-8-jdk
+        - sbt
+      tags: sbt

provisioning/image/ansible/07_application.yml

@@ -34,6 +34,14 @@
     - name: npm install
       shell: cd /home/isucon/private_isu/webapp/node; bash -lc "npm install"
 
+- hosts: guests:extras
+  become: yes
+  become_user: isucon
+  gather_facts: no
+  tasks:
+    - name: build Play app
+      shell: cd /home/isucon/private_isu/webapp/scala; bash -lc "./setup.sh"
+
 - hosts: guests:extras
   become: yes
   tasks:
@@ -44,5 +52,7 @@
       copy: src=../files/etc/systemd/system/isu-go.service dest=/etc/systemd/system/isu-go.service owner=root mode=644
     - name: node app (systemd)
       copy: src=../files/etc/systemd/system/isu-node.service dest=/etc/systemd/system/isu-node.service owner=root mode=644
+    - name: scala app (systemd)
+      copy: src=../files/etc/systemd/system/isu-scala.service dest=/etc/systemd/system/isu-scala.service owner=root mode=644
     - name: default application selection
       service: name=isu-ruby state=running enabled=true

provisioning/image/files/etc/systemd/system/isu-scala.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=isu-scala
+After=syslog.target
+
+[Service]
+WorkingDirectory=/home/isucon/private_isu/webapp/scala
+EnvironmentFile=/home/isucon/env.sh
+SuccessExitStatus=143
+
+User=isucon
+Group=isucon
+ExecStart=/home/isucon/private_isu/webapp/scala/target/universal/stage/bin/private-isu -J-server -J-Xmx512M -Dhttp.port=8080 -Duser.timezone=Asia/Tokyo
+ExecStop=/bin/kill -s QUIT $MAINPID
+ExecReload=/bin/kill -s USR2 $MAINPID
+
+[Install]
+WantedBy=multi-user.target

webapp/scala/.gitignore

@@ -0,0 +1,8 @@
+logs
+target
+/.idea
+/.idea_modules
+/.classpath
+/.project
+/.settings
+/RUNNING_PID

webapp/scala/app/controllers/AssetsController.scala

@@ -0,0 +1,36 @@
+package controllers
+
+import java.io._
+import javax.inject.Inject
+
+import play.api._
+import play.api.http.FileMimeTypes
+import play.api.mvc._
+
+import scala.concurrent.{ ExecutionContext, Future }
+
+/**
+ * Stolen from controllers.ExternalAssets
+ */
+class AssetsController @Inject() (environment: Environment)(implicit ec: ExecutionContext, fileMimeTypes: FileMimeTypes)
+  extends ControllerHelpers {
+
+  private val rootPath = sys.props.getOrElse("isu.public.dir", "/home/isucon/private_isu/webapp/public")
+
+  private val Action = new ActionBuilder.IgnoringBody()(_root_.controllers.Execution.trampoline)
+
+  def at(file: String): Action[AnyContent] = Action.async { request =>
+    Future {
+
+      val fileToServe = new File(rootPath, file)
+
+      if (fileToServe.exists) {
+        Ok.sendFile(fileToServe, inline = true).withHeaders(CACHE_CONTROL -> "max-age=3600")
+      } else {
+        NotFound
+      }
+
+    }
+  }
+
+}