update region tags (GoogleCloudPlatform#1179)

* region tags: request/logging example

* analytics

* mailgun

* mailjet, sendgrid

* cloud sql and postgresql and datastore

* Storage, twilio

* pubsub

* fixed app.yaml errors

Author: averikitsch

appengine-java8/requests/src/main/java/com/example/appengine/requests/LoggingServlet.java

@@ -22,7 +22,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-// [START simple_logging_example]
+// [START gae_java8_logging_example]
 // With @WebServlet annotation the webapp/WEB-INF/web.xml is no longer required.
 @WebServlet(
     name = "RequestLogging",
@@ -44,4 +44,4 @@ public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOExc
     // [END_EXCLUDE]
   }
 }
-// [END simple_logging_example]
+// [END gae_java8_logging_example]

appengine-java8/requests/src/main/java/com/example/appengine/requests/RequestsServlet.java

@@ -21,7 +21,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-// [START simple_request_example]
+// [START gae_java8_request_example]
 // With @WebServlet annotation the webapp/WEB-INF/web.xml is no longer required.
 @WebServlet(name = "requests", description = "Requests: Trivial request", urlPatterns = "/requests")
 public class RequestsServlet extends HttpServlet {
@@ -32,4 +32,4 @@ public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOExc
     resp.getWriter().println("Hello, world");
   }
 }
-// [END simple_request_example]
+// [END gae_java8_request_example]

appengine/requests/src/main/java/com/example/appengine/requests/LoggingServlet.java

@@ -21,7 +21,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-// [START simple_logging_example]
+// [START gae_java_logging_example]
 public class LoggingServlet extends HttpServlet {
   private static final Logger log = Logger.getLogger(LoggingServlet.class.getName());
 
@@ -36,6 +36,5 @@ public void doGet(HttpServletRequest req, HttpServletResponse resp)
     resp.getWriter().println("Check logs for results");
     // [END_EXCLUDE]
   }
-} 
-// [END simple_logging_example]
-
+}
+// [END gae_java_logging_example]

appengine/requests/src/main/java/com/example/appengine/requests/RequestsServlet.java

@@ -20,7 +20,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-// [START simple_request_example]
+// [START gae_java_request_example]
 public class RequestsServlet extends HttpServlet {
   @Override
   public void doGet(HttpServletRequest req, HttpServletResponse resp)
@@ -29,5 +29,4 @@ public void doGet(HttpServletRequest req, HttpServletResponse resp)
     resp.getWriter().println("Hello, world");
   }
 }
-// [END simple_request_example]
-
+// [END gae_java_request_example]

flexible/analytics/src/main/appengine/app.yaml

@@ -5,7 +5,7 @@ handlers:
 - url: /.*
   script: this field is required, but ignored
 
-# [START env_variables]
+# [START gae_flex_analytics_env_variables]
 env_variables:
   GA_TRACKING_ID: YOUR-GA-TRACKING-ID
-# [END env_variables]
+# [END gae_flex_analytics_env_variables]

flexible/analytics/src/main/java/com/example/analytics/AnalyticsServlet.java

@@ -29,7 +29,7 @@
 import org.apache.http.client.utils.URIBuilder;
 import org.apache.http.impl.client.HttpClientBuilder;
 
-// [START example]
+// [START gae_flex_analytics_track_event]
 @SuppressWarnings("serial")
 @WebServlet(name = "analytics", value = "")
 public class AnalyticsServlet extends HttpServlet {
@@ -63,4 +63,4 @@ public void doGet(HttpServletRequest req, HttpServletResponse resp)
     resp.getWriter().println("Event tracked.");
   }
 }
-// [END example]
+// [END gae_flex_analytics_track_event]

flexible/cloudsql/pom.xml

@@ -30,7 +30,7 @@
     <version>1.0.9</version>
   </parent>
 
-<!-- [START properties] -->
+<!-- [START gae_flex_mysql_properties] -->
   <properties>
 <!--
     INSTANCE_CONNECTION_NAME from Cloud Console > SQL > Instance Details > Properties
@@ -50,7 +50,7 @@
 <!-- [END_EXCLUDE] -->
     <sqlURL>jdbc:mysql://google/${database}?cloudSqlInstance=${INSTANCE_CONNECTION_NAME}&amp;socketFactory=com.google.cloud.sql.mysql.SocketFactory&amp;user=${user}&amp;password=${password}&amp;useSSL=false</sqlURL>
   </properties>
-<!-- [END properties] -->
+<!-- [END gae_flex_mysql_properties] -->
 
   <dependencies>
     <dependency>
@@ -75,7 +75,7 @@
       <type>jar</type>
       <scope>provided</scope>
     </dependency>
-    <!-- [START dependencies] -->
+    <!-- [START gae_flex_mysql_dependencies] -->
     <dependency>                        <!-- http://dev.mysql.com/doc/connector-j/en/ -->
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
@@ -86,17 +86,17 @@
       <artifactId>mysql-socket-factory-connector-j-6</artifactId>
       <version>1.0.10</version>
     </dependency>
-    <!-- [END dependencies] -->
+    <!-- [END gae_flex_mysql_dependencies] -->
   </dependencies>
   <build>
-    <!-- [START resources] -->
+    <!-- [START gae_flex_mysql_resources] -->
     <resources>
       <resource>
         <directory>src/main/resources</directory>
         <filtering>true</filtering>
       </resource>
     </resources>
-    <!-- [END resources] -->
+    <!-- [END gae_flex_mysql_resources] -->
     <!-- for hot reload of the web application -->
     <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
     <plugins>

flexible/cloudsql/src/main/java/com/example/cloudsql/CloudSqlServlet.java

@@ -39,7 +39,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-// [START example]
+// [START gae_flex_mysql_app]
 @SuppressWarnings("serial")
 @WebServlet(name = "cloudsql", value = "")
 public class CloudSqlServlet extends HttpServlet {
@@ -126,4 +126,4 @@ public void init() throws ServletException {
     }
   }
 }
-// [END example]
+// [END gae_flex_mysql_app]

flexible/cloudstorage/src/main/appengine/app.yaml

@@ -5,7 +5,5 @@ handlers:
 - url: /.*
   script: this field is required, but ignored
 
-# [START env_variables]
 env_variables:
   BUCKET_NAME: YOUR-BUCKET-NAME
-# [END env_variables]

flexible/cloudstorage/src/main/java/com/example/cloudstorage/UploadServlet.java

@@ -34,7 +34,7 @@
 import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.Part;
 
-// [START example]
+// [START gae_flex_storage_app]
 @SuppressWarnings("serial")
 @WebServlet(name = "upload", value = "/upload")
 @MultipartConfig()
@@ -67,4 +67,4 @@ public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOEx
     resp.getWriter().print(blob.getMediaLink());
   }
 }
-// [END example]
+// [END gae_flex_storage_app]