GoogleAppEngine for Javaはありますが、JavaではなくScalaで書きたいので、Scalaでデプロイ出来ないかなと色々探してみました。
cloud.google.com
やること
やることは簡単です。
使ったもののVersionはScala 2.11.7, sbt 0.13.11 です。
1. sbt-appengine pluginの導入
こちらを利用します。
github.com
2ファイル用意する必要があります。
0.12.xの時は違う設定になるようなので注意です。
appengine.sbt
libraryDependencies += "org.mortbay.jetty" % "jetty" % "6.1.22" % "container"
appengineSettings
/project/plugins.sbt
addSbtPlugin("com.eed3si9n" % "sbt-appengine" % "0.6.2")
2. appengine-web.xmlの準備
/src/main/webapp/WEB-INF/appengine-web.xml
xml version="1.0" encoding="utf-8"
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>dark</application>
<version>1</version>
<threadsafe>true</threadsafe>
</appengine-web-app>
ここでのapplicationはGoogle Console上の project id を指定します。
/src/main/scala/com/ru/waka/servlets/Main.scala
package com.ru.waka.servlets
import javax.servlet.http.{HttpServlet, HttpServletRequest, HttpServletResponse}
class Main extends HttpServlet {
override def doGet(request: HttpServletRequest, response: HttpServletResponse) {
response.setContentType("text/plain")
response.getWriter.println("Hello, world")
}
}
/src/main/webapp/WEB-INF/web.xml
xml version="1.0" encoding="utf-8"
<web-app xmlnsxsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlnsweb="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsischemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<servlet>
<servlet-name>Main</servlet-name>
<servlet-class>com.ru.waka.servlets.Main</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Main</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
SDKをダウンロードして、APPENGINE_SDK_HOMEという環境変数を設定する必要があります。
ダウンロードはこちらで。
Download the Google App Engine SDK - App Engine — Google Cloud Platform
APPENGINE_SDK_HOMEをunzipした↑のディレクトリのパスに設定します。
export APPENGINE_SDK_HOME=/path/to/unzipped_google_app_engine_sdk
tips
- intellijで起動時にAPPENGINE_SDK_HOMEが見えるようにする
- APPENGINE_SDK_HOMEをintellijに設定ができず困りました
- APPENGINE_SDK_HOMEを設定したターミナルで
open /Applications/IntelliJ\ IDEA\ 14\ CE.app/ とやると開けます。
実行
$sbt
[info] Loading project definition from /path/to/scala-on-appengine/project
[info] Set current project to scala-on-appengine (in build file:/path/to/scala-on-appengine/)
> appengineDevServer
[info] Compiling 1 Scala source to /path/scala-on-appengine/target/scala-2.11/classes...
[info] 'compiler-interface' not yet compiled for Scala 2.11.7. Compiling...
[info] Compilation completed in 11.87 s
[info] Packaging /path/scala-on-appengine/target/scala-2.11/scala-on-appengine_2.11-0.1-SNAPSHOT.war ...
[info] Done packaging.
[info] Starting dev server in the background ...
objc[4157]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/jre/bin/java and /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
[success] Total time: 21 s, completed 2016/03/26 16:13:25
Listening for transport dt_socket at address: 1044
> 3 26, 2016 4:13:29 午後 com.google.apphosting.utils.jetty.JettyLogger info
情報: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
3 26, 2016 4:13:29 午後 com.google.apphosting.utils.jetty.JettyLogger info
情報: jetty-6.1.x
3 26, 2016 4:13:31 午後 com.google.apphosting.utils.jetty.JettyLogger info
情報: Started SelectChannelConnector@127.0.0.1:8080
3 26, 2016 4:13:31 午後 com.google.appengine.tools.development.AbstractModule startup
情報: Module instance default is running at http://localhost:8080/
3 26, 2016 4:13:31 午後 com.google.appengine.tools.development.AbstractModule startup
情報: The admin console is running at http://localhost:8080/_ah/admin
3 26, 2016 4:13:31 午後 com.google.appengine.tools.development.DevAppServerImpl doStart
情報: Dev App Server is now running
> appengineDeploy
appcfg.sh should ideally be run using Java 7 (also known as 1.7).
The java executable at /usr/bin/java reports:
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)
Running a more recent version of Java can lead to apps that are apparently
correct but do not work when uploaded to App Engine.
You can download JDK 7 from:
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
Please enter code:
ここまで来るとこんな画面が出るので、ログインしてみましょう。
Please enter code:のところにモザイクがかかっている値を入れると次に進みます。
Please enter code: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Reading application configuration data...
Beginning interaction for module default...
3 26, 2016 4:31:18 午後 com.google.appengine.tools.admin.AbstractServerConnection send1
警告: Error posting to URL: https://appengine.google.com/api/appversion/getresourcelimits?app_id=dark&version=1&
403 Forbidden
You do not have permission to modify this app (app_id=u'dark').
This is try
3 26, 2016 4:31:18 午後 com.google.appengine.tools.admin.AbstractServerConnection send1
警告: Error posting to URL: https://appengine.google.com/api/appversion/getresourcelimits?app_id=dark&version=1&
403 Forbidden
You do not have permission to modify this app (app_id=u'dark').
This is try
3 26, 2016 4:31:19 午後 com.google.appengine.tools.admin.AbstractServerConnection send1
警告: Error posting to URL: https://appengine.google.com/api/appversion/getresourcelimits?app_id=dark&version=1&
403 Forbidden
You do not have permission to modify this app (app_id=u'dark').
This is try
3 26, 2016 4:31:19 午後 com.google.appengine.tools.admin.AbstractServerConnection send1
警告: Error posting to URL: https://appengine.google.com/api/appversion/getresourcelimits?app_id=dark&version=1&
403 Forbidden
You do not have permission to modify this app (app_id=u'dark').
This is try
com.google.appengine.tools.admin.HttpIoException: Error posting to URL: https://appengine.google.com/api/appversion/getresourcelimits?app_id=dark&version=1&
403 Forbidden
You do not have permission to modify this app (app_id=u'dark').
Unable to update app: Error posting to URL: https://appengine.google.com/api/appversion/getresourcelimits?app_id=dark&version=1&
403 Forbidden
You do not have permission to modify this app (app_id=u'dark').
Please see the logs [/var/folders/3x/tr8_68tx29v9skp0lv76ljvc0000gn/T/appcfg1764707419651306170.log] for further information.
というところでした。ScalaでもGoogle App Engineは使えました。
今回試したレポジトリはこちらです。
git cloneと 4. Google App Engine SDKのダウンロードとの設定 だけで動くと思います。
github.com
参考
