gaeinfo (#689)

* gaeinfo

Simple Servlet that displays most info

* Fix ReadMe

appengine-java8/gaeinfo/README.md

@@ -0,0 +1,63 @@
+# Google App Engine Information
+
+This sample displays what's going on in your app. It dumps the environment and lots more.
+
+See the [Google App Engine standard environment documentation][ae-docs] for more
+detailed instructions.
+
+[ae-docs]: https://cloud.google.com/appengine/docs/java/
+
+## Setup
+
+Use either:
+
+* `gcloud init`
+* `gcloud auth application-default login`
+
+## Maven
+### Running locally
+
+    $ mvn appengine:run
+
+### Deploying
+
+    $ mvn appengine:deploy
+
+## Gradle
+### Running locally
+
+    $ gradle appengineRun
+
+If you do not have gradle installed, you can run using `./gradlew appengineRun`.
+
+### Deploying
+
+    $ gradle appengineDeploy
+
+If you do not have gradle installed, you can deploy using `./gradlew appengineDeploy`.
+
+<!--
+## Intelij Idea
+Limitations - Appengine Standard support in the Intellij plugin is only available for the Ultimate Edition of Idea.
+
+### Install and Set Up Cloud Tools for IntelliJ
+
+To use Cloud Tools for IntelliJ, you must first install IntelliJ IDEA Ultimate edition.
+
+Next, install the plugins from the IntelliJ IDEA Plugin Repository.
+
+To install the plugins:
+
+1. From inside IDEA, open File > Settings (on Mac OS X, open IntelliJ IDEA > Preferences).
+1. In the left-hand pane, select Plugins.
+1. Click Browse repositories.
+1. In the dialog that opens, select Google Cloud Tools.
+1. Click Install.
+1. Click Close.
+1. Click OK in the Settings dialog.
+1. Click Restart (or you can click Postpone, but the plugins will not be available until you do restart IDEA.)
+
+### Running locally
+
+### Deploying
+ -->

appengine-java8/gaeinfo/pom.xml

@@ -0,0 +1,88 @@
+<!--
+Copyright 2017 Google Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<!-- [START pom] -->
+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <packaging>war</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <groupId>com.example.appengine</groupId>
+  <artifactId>gaeinfo-j8</artifactId>
+
+  <parent>
+    <artifactId>appengine-java8-samples</artifactId>
+    <groupId>com.google.cloud</groupId>
+    <version>1.0.0</version>
+    <relativePath>..</relativePath>
+  </parent>
+
+  <!-- [START compiler] -->
+  <properties>  <!-- App Engine Standard currently requires Java 7 -->
+    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.source>1.8</maven.compiler.source>
+  </properties>
+<!-- [END compiler] -->
+
+  <dependencies>
+      <dependency>
+      <groupId>com.google.appengine</groupId>
+      <artifactId>appengine-api-1.0-sdk</artifactId>
+      <version>${appengine.sdk.version}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>javax.servlet-api</artifactId>
+      <version>3.1.0</version>
+      <type>jar</type>
+      <scope>provided</scope>
+    </dependency>
+
+  </dependencies>
+
+  <build>
+    <!-- for hot reload of the web application -->
+    <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-war-plugin</artifactId>
+        <version>3.0.0</version>
+        <configuration>
+          <webResources>
+            <!-- in order to interpolate version from pom into appengine-web.xml -->
+            <resource>
+              <directory>${basedir}/src/main/webapp/WEB-INF</directory>
+              <filtering>true</filtering>
+              <targetPath>WEB-INF</targetPath>
+            </resource>
+          </webResources>
+        </configuration>
+      </plugin>
+
+      <plugin>
+        <groupId>com.google.cloud.tools</groupId>
+        <artifactId>appengine-maven-plugin</artifactId>
+        <version>1.3.1</version>
+        <configuration>
+          <deploy.promote>true</deploy.promote>
+          <deploy.stopPreviousVersion>true</deploy.stopPreviousVersion>
+        </configuration>
+      </plugin>
+
+    </plugins>
+  </build>
+</project>
+<!-- [END pom] -->

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

@@ -0,0 +1,134 @@
+/**
+ * Copyright 2017 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.appengine.standard;
+
+import com.google.appengine.api.appidentity.AppIdentityService;
+import com.google.appengine.api.appidentity.AppIdentityServiceFactory;
+import com.google.appengine.api.utils.SystemProperty;
+import com.google.apphosting.api.ApiProxy;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Enumeration;
+import java.util.Map;
+import java.util.Properties;
+
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+// [START example]
+@SuppressWarnings({"serial"})
+@WebServlet(name = "GAEInfo", description = "GAEInfo: Write info about GAE Standard",
+    urlPatterns = "/gaeinfo")
+//CHECKSTYLE:OFF
+public class GAEInfoServlet extends HttpServlet {
+
+  public void table(PrintWriter p, String title, String c) {
+    p.print("<h3>" + title + "</h3>");
+    p.print("<table>");
+    p.print(c);
+    p.print("</table>");
+  }
+
+  public String tr(String c) {
+    return "<tr>" + c + "</tr>";
+  }
+
+  public String td(String s) {
+    return "<td>" + s + "</td>";
+  }
+
+
+  @Override
+  public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+    resp.setContentType("text/html");
+    PrintWriter p = resp.getWriter();
+
+
+    p.print("<html><body>");
+
+    final AppIdentityService appIdentity = AppIdentityServiceFactory.getAppIdentityService();
+    table(p, "AppIdentity",
+      tr(td("ServiceAccountName") + td(appIdentity.getServiceAccountName()) ) +
+         tr(td("GCS Bucket") + td( appIdentity.getDefaultGcsBucketName()))
+    );
+
+    table(p, "SystemProperties",
+        tr( td( "appId") + td(SystemProperty.applicationId.get()) ) +
+        tr(td("appVer") + td( SystemProperty.applicationVersion.get()) ) +
+        tr(td("version") + td(SystemProperty.version.get()) ) +
+        tr(td("environment") + td(SystemProperty.environment.get()) )
+    );
+
+
+    // Environment Atributes
+    ApiProxy.Environment env = ApiProxy.getCurrentEnvironment();
+    Map<String,Object> attr = env.getAttributes();
+
+    String c = "";
+    for(String key : attr.keySet()) {
+      Object o = attr.get(key);
+
+      if(o.getClass().getCanonicalName().equals("java.lang.String")) {
+        c += tr(td(key) + td((String) o));
+      } else
+        c += tr(td(key) + td(o.getClass().getCanonicalName()));
+    }
+    table(p, "Environment Attributes", c);
+
+    c = "";
+    for (Enumeration<String> e = req.getHeaderNames(); e.hasMoreElements();) {
+      String key = e.nextElement();
+      String val = req.getHeader(key);
+      c += tr(td(key) + td(val) );;
+    }
+    table(p, "Headers", c);
+
+
+    Cookie[] cookies = req.getCookies();
+    if(cookies != null && cookies.length != 0) {
+      c = "";
+      for (Cookie co : cookies) {
+        c += tr( td(co.getName()) + td(co.getValue()) + td(co.getComment()) +
+                td(co.getPath()) + td(Integer.toString(co.getMaxAge())) );
+      }
+      table(p, "Cookies", c);
+    }
+
+    Properties properties = System.getProperties();
+    c = "";
+    for(Enumeration e = properties.propertyNames(); e.hasMoreElements();) {
+      String key = (String) e.nextElement();
+      c += tr( td(key) + td((String)properties.get(key)));
+    }
+    table(p, "Java SystemProperties", c);
+
+    Map<String, String> envVar = System.getenv();
+    c = "";
+    for(String key : envVar.keySet()) {
+      c += tr(td(key)+td(envVar.get(key)));
+    }
+    table(p, "Envirionment Variables", c);
+    p.print("</body></html>");
+    p.close();
+
+  }
+}
+// [END example]

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

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 Google Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<!-- [START config] -->
+<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
+  <threadsafe>true</threadsafe>
+  <ssl-enabled>true</ssl-enabled>
+  <runtime>java8</runtime>
+</appengine-web-app>
+<!-- [END config] -->

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

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+
+ Copyright 2017 Google Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ -->
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
+         http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+         version="3.1">
+  <welcome-file-list>
+    <welcome-file>gaeinfo</welcome-file>
+  </welcome-file-list>
+</web-app>

appengine-java8/pom.xml

@@ -51,6 +51,8 @@
 
     <module>firebase-tictactoe</module>
 
+    <module>gaeinfo</module>
+
     <module>guestbook-cloud-datastore</module>
     <module>guestbook-objectify</module>