Merge pull request GoogleCloudPlatform#256 from GoogleCloudPlatform/c…

…loudsql2

Add cloudsql gen2 managed vms sample

managed_vms/cloudsql/.gitignore

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+/bin/

managed_vms/cloudsql/README.md

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+# Cloud SQL sample for Google Managed VMs
+This sample demonstrates how to use [Cloud SQL](https://cloud.google.com/sql/) on Google Managed VMs.
+
+## Setup
+Before you can run or deploy the sample, you will need to do the following:
+
+1. Create a [Second Generation Cloud SQL](https://cloud.google.com/sql/docs/create-instance) instance. You can do this from the [Cloud Console](https://console.developers.google.com) or via the [Cloud SDK](https://cloud.google.com/sdk). To create it via the SDK use the following command:
+
+        $ gcloud sql instances create YOUR_INSTANCE_NAME \
+            --activation-policy=ALWAYS \
+            --tier=db-n1-standard-1
+
+1. Set the root password on your Cloud SQL instance:
+
+        $ gcloud sql instances set-root-password YOUR_INSTANCE_NAME --password YOUR_INSTANCE_ROOT_PASSWORD
+
+1. Use the MySQL command line tools (or a management tool of your choice) to create a [new user](https://cloud.google.com/sql/docs/create-user) and [database](https://cloud.google.com/sql/docs/create-database) for your application:
+
+    $ mysql -h [IP Address of database] -u root -p
+    mysql> create database YOUR_DATABASE;
+    mysql> create user 'YOUR_USER'@'%' identified by 'PASSWORD';
+    mysql> grant all on YOUR_DATABASE.* to 'YOUR_USER'@'%';
+
+1. Set the connection string environment variable in src/main/appengine/app.yaml
+
+## Running locally
+    $ mvn clean jetty:run
+
+## Deploying
+    $ mvn clean gcloud:deploy

managed_vms/cloudsql/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2016 Google Inc. All Rights Reserved.
+
+ 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.
+-->
+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <packaging>war</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <groupId>com.example.managedvms</groupId>
+  <artifactId>managed-vms-cloudsql</artifactId>
+
+  <parent>
+    <artifactId>doc-samples</artifactId>
+    <groupId>com.google.cloud</groupId>
+    <version>1.0.0</version>
+    <relativePath>../..</relativePath>
+  </parent>
+
+  <dependencies>
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>javax.servlet-api</artifactId>
+      <version>3.1.0</version>
+      <type>jar</type>
+      <scope>provided</scope>
+    </dependency>
+    <!-- [START dependencies] -->
+    <dependency>                        <!-- http://dev.mysql.com/doc/connector-j/en/ -->
+      <groupId>mysql</groupId>
+      <artifactId>mysql-connector-java</artifactId>
+      <version>5.1.38</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.cloud.sql</groupId>
+      <artifactId>mysql-socket-factory</artifactId>
+      <version>1.0.0-beta1</version>
+    </dependency>
+    <!-- [END dependencies] -->
+  </dependencies>
+  <build>
+    <!-- for hot reload of the web application -->
+    <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
+    <plugins>
+      <plugin>
+        <groupId>com.google.appengine</groupId>
+        <artifactId>gcloud-maven-plugin</artifactId>
+        <version>${maven.plugin.version}</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-war-plugin</artifactId>
+        <version>2.6</version>
+        <configuration>
+          <failOnMissingWebXml>false</failOnMissingWebXml>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.3</version>
+        <configuration>
+          <source>1.8</source>
+          <target>1.8</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.eclipse.jetty</groupId>
+        <artifactId>jetty-maven-plugin</artifactId>
+        <version>9.3.7.v20160115</version>
+      </plugin>
+    </plugins>
+  </build>
+</project>

managed_vms/cloudsql/src/main/appengine/app.yaml

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+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# 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.
+
+runtime: java
+vm: true
+
+handlers:
+- url: /.*
+  script: this field is required, but ignored
+  secure: always
+
+# [START env_variables]
+env_variables:
+  SQL_REMOTE_URL: jdbc:mysql://google/YOUR-DB-NAME?cloudSqlInstance=YOUR-INSTANCE-NAME&socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=USERNAME&password=PASSWORD
+  SQL_LOCAL_URL: jdbc:mysql://localhost/YOUR-DB-NAME?user=YOUR-USERNAME&password=PASSWORD&useSSL=false
+# [END env_variables]

managed_vms/cloudsql/src/main/java/com/example/managedvms/cloudsql/CloudSqlServlet.java

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+/**
+ * Copyright 2016 Google Inc. All Rights Reserved.
+ *
+ * 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.managedvms.cloudsql;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.util.Date;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+// [START example]
+@SuppressWarnings("serial")
+@WebServlet(name = "cloudsql", value = "")
+public class CloudSqlServlet extends HttpServlet {
+
+  @Override
+  public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException,
+      ServletException {
+    // store only the first two octets of a users ip address
+    String userIp = req.getRemoteAddr();
+    InetAddress address = InetAddress.getByName(userIp);
+    if (address instanceof Inet6Address) {
+      // nest indexOf calls to find the second occurrence of a character in a
+      // string
+      // an alternative is to use Apache Commons Lang:
+      // StringUtils.ordinalIndexOf()
+      userIp = userIp.substring(0, userIp.indexOf(":", userIp.indexOf(":") + 1)) + ":*:*:*:*:*:*";
+    } else if (address instanceof Inet4Address) {
+      userIp = userIp.substring(0, userIp.indexOf(".", userIp.indexOf(".") + 1)) + ".*.*";
+    }
+
+    final String createTableSql = "CREATE TABLE IF NOT EXISTS visits ( visit_id INT NOT NULL "
+        + "AUTO_INCREMENT, user_ip VARCHAR(46) NOT NULL, timestamp DATETIME NOT NULL, "
+        + "PRIMARY KEY (visit_id) )";
+    final String createVisitSql = "INSERT INTO visits (user_ip, timestamp) VALUES (?, ?)";
+    final String selectSql = "SELECT user_ip, timestamp FROM visits ORDER BY timestamp DESC "
+        + "LIMIT 10";
+    PrintWriter out = resp.getWriter();
+    resp.setContentType("text/plain");
+    // Detect if running remotely or locally and select correct connection url
+    String url;
+    if (System.getenv().containsKey("GAE_MODULE_INSTANCE")) {
+      url = System.getenv("SQL_REMOTE_URL");
+    } else {
+      url = System.getenv("SQL_LOCAL_URL");
+    }
+
+    try (Connection conn = DriverManager.getConnection(url);
+        PreparedStatement statementCreateVisit = conn.prepareStatement(createVisitSql)) {
+      conn.createStatement().executeUpdate(createTableSql);
+      statementCreateVisit.setString(1, userIp);
+      statementCreateVisit.setTimestamp(2, new Timestamp(new Date().getTime()));
+      statementCreateVisit.executeUpdate();
+
+      try (ResultSet rs = conn.prepareStatement(selectSql).executeQuery()) {
+        out.print("Last 10 visits:\n");
+        while (rs.next()) {
+          String savedIp = rs.getString("user_ip");
+          String timeStamp = rs.getString("timestamp");
+          out.print("Time: " + timeStamp + " Addr: " + savedIp + "\n");
+        }
+      }
+    } catch (SQLException e) {
+      throw new ServletException("SQL error", e);
+    }
+  }
+}
+// [END example]

pom.xml

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         <project.oauth.version>1.19.0</project.oauth.version>
         <maven.compiler.target>1.7</maven.compiler.target>
         <maven.compiler.source>1.7</maven.compiler.source>
+        <maven.plugin.version>2.0.9.111.v20160525</maven.plugin.version>
     </properties>
 
     <prerequisites>
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         <module>logging</module>
         <module>managed_vms/analytics</module>
         <module>managed_vms/async-rest</module>
+        <module>managed_vms/cloudsql</module>
         <module>managed_vms/cloudstorage</module>
         <module>managed_vms/cron</module>
         <module>managed_vms/datastore</module>