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gaeinfo (#689)
* gaeinfo Simple Servlet that displays most info * Fix ReadMe
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‎appengine-java8/gaeinfo/README.md‎

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# Google App Engine Information
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This sample displays what's going on in your app. It dumps the environment and lots more.
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See the [Google App Engine standard environment documentation][ae-docs] for more
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detailed instructions.
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[ae-docs]: https://cloud.google.com/appengine/docs/java/
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## Setup
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Use either:
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* `gcloud init`
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* `gcloud auth application-default login`
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## Maven
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### Running locally
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$ mvn appengine:run
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### Deploying
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$ mvn appengine:deploy
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## Gradle
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### Running locally
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$ gradle appengineRun
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If you do not have gradle installed, you can run using `./gradlew appengineRun`.
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### Deploying
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$ gradle appengineDeploy
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If you do not have gradle installed, you can deploy using `./gradlew appengineDeploy`.
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<!--
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## Intelij Idea
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Limitations - Appengine Standard support in the Intellij plugin is only available for the Ultimate Edition of Idea.
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### Install and Set Up Cloud Tools for IntelliJ
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To use Cloud Tools for IntelliJ, you must first install IntelliJ IDEA Ultimate edition.
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Next, install the plugins from the IntelliJ IDEA Plugin Repository.
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To install the plugins:
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1. From inside IDEA, open File > Settings (on Mac OS X, open IntelliJ IDEA > Preferences).
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1. In the left-hand pane, select Plugins.
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1. Click Browse repositories.
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1. In the dialog that opens, select Google Cloud Tools.
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1. Click Install.
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1. Click Close.
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1. Click OK in the Settings dialog.
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1. Click Restart (or you can click Postpone, but the plugins will not be available until you do restart IDEA.)
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### Running locally
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### Deploying
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-->

‎appengine-java8/gaeinfo/pom.xml‎

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<!--
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Copyright 2017 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<!-- [START pom] -->
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<project>
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<modelVersion>4.0.0</modelVersion>
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<packaging>war</packaging>
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<version>1.0-SNAPSHOT</version>
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<groupId>com.example.appengine</groupId>
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<artifactId>gaeinfo-j8</artifactId>
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<parent>
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<artifactId>appengine-java8-samples</artifactId>
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<groupId>com.google.cloud</groupId>
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<version>1.0.0</version>
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<relativePath>..</relativePath>
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</parent>
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<!-- [START compiler] -->
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<properties> <!-- App Engine Standard currently requires Java 7 -->
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<maven.compiler.target>1.8</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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</properties>
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<!-- [END compiler] -->
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<dependencies>
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<dependency>
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<groupId>com.google.appengine</groupId>
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<artifactId>appengine-api-1.0-sdk</artifactId>
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<version>${appengine.sdk.version}</version>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<version>3.1.0</version>
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<type>jar</type>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<!-- for hot reload of the web application -->
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<outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-war-plugin</artifactId>
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<version>3.0.0</version>
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<configuration>
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<webResources>
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<!-- in order to interpolate version from pom into appengine-web.xml -->
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<resource>
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<directory>${basedir}/src/main/webapp/WEB-INF</directory>
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<filtering>true</filtering>
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<targetPath>WEB-INF</targetPath>
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</resource>
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</webResources>
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</configuration>
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</plugin>
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<plugin>
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<groupId>com.google.cloud.tools</groupId>
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<artifactId>appengine-maven-plugin</artifactId>
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<version>1.3.1</version>
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<configuration>
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<deploy.promote>true</deploy.promote>
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<deploy.stopPreviousVersion>true</deploy.stopPreviousVersion>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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<!-- [END pom] -->

‎appengine-java8/gaeinfo/src/main/java/com/example/appengine/standard/GAEInfoServlet.java‎

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/**
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* Copyright 2017 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.appengine.standard;
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import com.google.appengine.api.appidentity.AppIdentityService;
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import com.google.appengine.api.appidentity.AppIdentityServiceFactory;
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import com.google.appengine.api.utils.SystemProperty;
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import com.google.apphosting.api.ApiProxy;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.Enumeration;
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import java.util.Map;
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import java.util.Properties;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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// [START example]
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@SuppressWarnings({"serial"})
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@WebServlet(name = "GAEInfo", description = "GAEInfo: Write info about GAE Standard",
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urlPatterns = "/gaeinfo")
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//CHECKSTYLE:OFF
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public class GAEInfoServlet extends HttpServlet {
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public void table(PrintWriter p, String title, String c) {
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p.print("<h3>" + title + "</h3>");
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p.print("<table>");
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p.print(c);
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p.print("</table>");
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}
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public String tr(String c) {
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return "<tr>" + c + "</tr>";
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}
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public String td(String s) {
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return "<td>" + s + "</td>";
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}
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@Override
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public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
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resp.setContentType("text/html");
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PrintWriter p = resp.getWriter();
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p.print("<html><body>");
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final AppIdentityService appIdentity = AppIdentityServiceFactory.getAppIdentityService();
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table(p, "AppIdentity",
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tr(td("ServiceAccountName") + td(appIdentity.getServiceAccountName()) ) +
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tr(td("GCS Bucket") + td( appIdentity.getDefaultGcsBucketName()))
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);
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table(p, "SystemProperties",
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tr( td( "appId") + td(SystemProperty.applicationId.get()) ) +
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tr(td("appVer") + td( SystemProperty.applicationVersion.get()) ) +
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tr(td("version") + td(SystemProperty.version.get()) ) +
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tr(td("environment") + td(SystemProperty.environment.get()) )
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);
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// Environment Atributes
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ApiProxy.Environment env = ApiProxy.getCurrentEnvironment();
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Map<String,Object> attr = env.getAttributes();
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String c = "";
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for(String key : attr.keySet()) {
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Object o = attr.get(key);
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if(o.getClass().getCanonicalName().equals("java.lang.String")) {
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c += tr(td(key) + td((String) o));
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} else
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c += tr(td(key) + td(o.getClass().getCanonicalName()));
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}
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table(p, "Environment Attributes", c);
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c = "";
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for (Enumeration<String> e = req.getHeaderNames(); e.hasMoreElements();) {
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String key = e.nextElement();
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String val = req.getHeader(key);
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c += tr(td(key) + td(val) );;
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}
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table(p, "Headers", c);
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Cookie[] cookies = req.getCookies();
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if(cookies != null && cookies.length != 0) {
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c = "";
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for (Cookie co : cookies) {
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c += tr( td(co.getName()) + td(co.getValue()) + td(co.getComment()) +
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td(co.getPath()) + td(Integer.toString(co.getMaxAge())) );
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}
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table(p, "Cookies", c);
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}
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Properties properties = System.getProperties();
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c = "";
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for(Enumeration e = properties.propertyNames(); e.hasMoreElements();) {
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String key = (String) e.nextElement();
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c += tr( td(key) + td((String)properties.get(key)));
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}
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table(p, "Java SystemProperties", c);
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Map<String, String> envVar = System.getenv();
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c = "";
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for(String key : envVar.keySet()) {
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c += tr(td(key)+td(envVar.get(key)));
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}
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table(p, "Envirionment Variables", c);
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p.print("</body></html>");
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p.close();
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}
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}
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// [END example]

‎appengine-java8/gaeinfo/src/main/webapp/WEB-INF/appengine-web.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright 2017 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<!-- [START config] -->
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<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
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<threadsafe>true</threadsafe>
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<ssl-enabled>true</ssl-enabled>
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<runtime>java8</runtime>
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</appengine-web-app>
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<!-- [END config] -->

‎appengine-java8/gaeinfo/src/main/webapp/WEB-INF/web.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright 2017 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
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http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
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version="3.1">
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<welcome-file-list>
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<welcome-file>gaeinfo</welcome-file>
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</welcome-file-list>
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</web-app>

‎appengine-java8/pom.xml‎

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<module>firebase-tictactoe</module>
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<module>gaeinfo</module>
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<module>guestbook-cloud-datastore</module>
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<module>guestbook-objectify</module>
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