Full Code of dpdearing/android-gps-emulator for AI

Repository: dpdearing/android-gps-emulator
Branch: master
Commit: f9c416329fab
Files: 23
Total size: 44.3 KB

Directory structure:
gitextract_seoxq25r/

├── .gitignore
├── LICENSE
├── README.md
├── lib/
│   └── gwt-maps-1.1.0.jar
├── pom.xml
├── repo/
│   └── de/
│       └── mud/
│           └── jta/
│               ├── 2.6/
│               │   ├── jta-2.6.jar
│               │   ├── jta-2.6.jar.md5
│               │   ├── jta-2.6.jar.sha1
│               │   ├── jta-2.6.pom
│               │   ├── jta-2.6.pom.md5
│               │   └── jta-2.6.pom.sha1
│               ├── maven-metadata.xml
│               ├── maven-metadata.xml.md5
│               └── maven-metadata.xml.sha1
└── src/
    └── main/
        ├── java/
        │   ├── Main.java
        │   └── com/
        │       └── dpdearing/
        │           └── sandbox/
        │               └── gpsemulator/
        │                   ├── client/
        │                   │   └── GpsEmulator.java
        │                   ├── common/
        │                   │   ├── EmulatorCommandException.java
        │                   │   ├── EmulatorConnectionException.java
        │                   │   └── LocationService.java
        │                   └── server/
        │                       └── LocationServiceImpl.java
        ├── resources/
        │   └── com/
        │       └── dpdearing/
        │           └── sandbox/
        │               └── gpsemulator/
        │                   └── GpsEmulator.gwt.xml
        └── webapp/
            ├── WEB-INF/
            │   └── web.xml
            └── gpsemulator/
                └── index.html

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitignore
================================================
.classpath
.project
.settings
.idea
*.iml

war
target

google_maps_api_key



================================================
FILE: LICENSE
================================================
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================================================
FILE: README.md
================================================
android-gps-emulator
====================

android-gps-emulator is a GPS location emulator for changing/setting/simulating the GPS location of the Android emulator through a simple map-based interface, using the geo fix command.

Using GWT and Google Maps in combination with [JTA (Java telnet support)](http://javassh.org/space/start), this is a simple tool for emulating the geospatial (GPS) location of your local android emulator using the telnet geo fix command.


**NOTE:** You must have a Google account _with billing enabled_ to generate an API key for the Google Maps JavaScript API. 
See Google's documentation at [Get API Key](https://developers.google.com/maps/documentation/javascript/get-api-key)

Quick Start
-----------
1. Download the [latest release](https://github.com/dpdearing/android-gps-emulator/releases/latest)
2. Create a file named **`google_maps_api_key`** containing your API key
3. Run the executable war: **`java -jar android-gps-emulator-0.3.war`**
4. http://localhost:8080/gpsemulator/

![android-gps-emulator](http://dpdearing.github.io/android-gps-emulator/img/android-gps-emulator.png)


Running on a Different Port
---------------------------

android-gps-emulator runs by default on port 8080.  The port can be changed by passing the desired port as a parameter when running the executable war.  For example, to run on port 9001:

   **`java -jar android-gps-emulator-0.3.war 9001`**


GWT Hosted Mode (from source)
-----------------------------
1. Clone the repository
2. Create a file named **`google_maps_api_key`** containing your API key
3. From the command line execute **`mvn gwt:run`**
4. Click `Launch Default Browser` from the GWT Development Mode



================================================
FILE: pom.xml
================================================
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  
  <groupId>com.dpdearing.sandbox</groupId>
  <artifactId>android-gps-emulator</artifactId>
  <packaging>war</packaging>
  <version>0.4-SNAPSHOT</version>

  <name>Android GPS Emulator</name>
  
  <repositories>
    <repository>
      <id>project.local</id>
      <url>file://${basedir}/./repo</url>
    </repository>
  </repositories>

  <properties>
    <!-- GWT configuration -->
    <gwt.version>2.8.0</gwt.version>
    <!-- Jetty configuration -->
    <jetty.version>9.2.14.v20151106</jetty.version>

    <!-- Compiler configuration -->
    <!-- Setting maven.compiler.source to something different to 1.8
         needs that you configure the sourceLevel in gwt-maven-plugin since
         GWT compiler 2.8 requires 1.8 (see gwt-maven-plugin block below) -->
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

    <gwt.module>com.dpdearing.sandbox.gpsemulator.GpsEmulator</gwt.module>
    <gwt.module.name>gpsemulator</gwt.module.name>
  </properties>

  <dependencyManagement>
    <dependencies>
      <!-- ensure all GWT dependencies use the same version (unless overridden) -->
      <dependency>
        <groupId>com.google.gwt</groupId>
        <artifactId>gwt</artifactId>
        <version>${gwt.version}</version>
        <scope>import</scope>
        <type>pom</type>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>
    <!-- JTA Java Telnet dependency -->
    <dependency>
      <groupId>de.mud</groupId>
      <artifactId>jta</artifactId>
      <version>2.6</version>
    </dependency>
    
    <!-- GWT dependencies -->
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-servlet</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-user</artifactId>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-dev</artifactId>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-codeserver</artifactId>
      <scope>provided</scope>
    </dependency>

    <!-- GWT Maps API V3 -->
    <dependency>
      <groupId>com.github.branflake2267</groupId>
      <artifactId>gwt-maps-api</artifactId>
      <version>3.10.0-alpha-7</version>
    </dependency>

    <!-- Jetty dependencies -->
    <dependency>
      <groupId>org.eclipse.jetty</groupId>
      <artifactId>jetty-webapp</artifactId>
      <version>${jetty.version}</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>
  
  <build>
    <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>

    <plugins>
      <!-- GWT Maven Plugin-->
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>gwt-maven-plugin</artifactId>
        <version>${gwt.version}</version>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>generateAsync</goal>
            </goals>
          </execution>
          <execution>
            <!-- Run tests through gwt:test, this allows reusing the plugin configuration for GWTTestCases -->
            <id>gwt-tests</id>
            <phase>test</phase>
            <goals>
              <goal>test</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <!-- Plugin configuration. There are many available options,
               see gwt-maven-plugin documentation at codehaus.org -->
          <modules>
            <module>com.dpdearing.sandbox.gpsemulator</module>
          </modules>
          <!-- GWT compiler 2.8 requires 1.8, hence define sourceLevel here if you use
               a different source language for java compilation -->
          <sourceLevel>1.8</sourceLevel>
          <!-- URL that should be opened by DevMode (gwt:run). -->
          <runTarget>${gwt.module.name}/index.html</runTarget>
          <copyWebapp>true</copyWebapp>
          <!-- Ask GWT to create the Story of Your Compile (SOYC) (gwt:compile) -->
          <compileReport>true</compileReport>
          <!-- Run tests using HtmlUnit -->
          <mode>htmlunit</mode>
          <!-- Tests patterns -->
          <includes>**/Test*.java,**/*Test.java,**/*TestCase.java</includes>
        </configuration>
      </plugin>

      <!-- Skip normal test execution, we use gwt:test instead -->
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.17</version>
        <configuration>
          <skip>true</skip>
        </configuration>
      </plugin>

      <!-- Generate a war file with the deployment web.xml -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.0.2</version>
        <configuration>
          <archive>
            <manifest>
              <mainClass>Main</mainClass>
            </manifest>
          </archive>
        </configuration>
      </plugin>
      
      <!-- From http://uguptablog.blogspot.com/2012/09/embedded-jetty-executable-war-with.html -->
      <!-- Ant Task to copy Main.class to the root of the war -->
      <plugin>
        <artifactId>maven-antrun-plugin</artifactId>
        <executions>
          <execution>
            <id>main-class-placement</id>
            <phase>prepare-package</phase>
            <configuration>
              <tasks>
                <copy todir="${project.build.directory}/${project.artifactId}-${project.version}/">
                  <fileset dir="${project.build.outputDirectory}">
                    <include name="Main.class" />
                  </fileset>
                </copy>
              </tasks>
            </configuration>
            <goals>
              <goal>run</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
            
      <!-- From http://uguptablog.blogspot.com/2012/09/embedded-jetty-executable-war-with.html -->
      <!-- Extract Jetty classes to the root of the war -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>2.3</version>
        <executions>
          <execution>
            <id>jetty-classpath</id>
            <phase>prepare-package</phase>
            <goals>
              <goal>unpack-dependencies</goal>
            </goals>
            <configuration>
              <includeGroupIds>org.eclipse.jetty,javax.servlet,org.mortbay.jasper</includeGroupIds>
              <outputDirectory>
                ${project.build.directory}/${project.artifactId}-${project.version}
              </outputDirectory>
            </configuration>
          </execution>
        </executions>
      </plugin>

    </plugins>
  </build>

</project>


================================================
FILE: repo/de/mud/jta/2.6/jta-2.6.jar.md5
================================================
b47e203ccd4f3aae0c53e47052be9c68

================================================
FILE: repo/de/mud/jta/2.6/jta-2.6.jar.sha1
================================================
f278e7c4a3c0a43022a13766bb73c9d4339eb25a

================================================
FILE: repo/de/mud/jta/2.6/jta-2.6.pom
================================================
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>de.mud</groupId>
  <artifactId>jta</artifactId>
  <version>2.6</version>
</project>


================================================
FILE: repo/de/mud/jta/2.6/jta-2.6.pom.md5
================================================
08d96f8b61f9aa224c79c9fb0d92ef5a

================================================
FILE: repo/de/mud/jta/2.6/jta-2.6.pom.sha1
================================================
23277ac79f4fe7be4bcdb39e8232a8ef23f326ef

================================================
FILE: repo/de/mud/jta/maven-metadata.xml
================================================
<?xml version="1.0" encoding="UTF-8"?>
<metadata>
  <groupId>de.mud</groupId>
  <artifactId>jta</artifactId>
  <versioning>
    <release>2.6</release>
    <versions>
      <version>2.6</version>
    </versions>
    <lastUpdated>20140520044720</lastUpdated>
  </versioning>
</metadata>


================================================
FILE: repo/de/mud/jta/maven-metadata.xml.md5
================================================
1daa35267720b26493c6baa2a9284bd9

================================================
FILE: repo/de/mud/jta/maven-metadata.xml.sha1
================================================
ec44209de74ca4ebe675869a5aa3882983ae1cc8

================================================
FILE: src/main/java/Main.java
================================================
/**
 * Copyright (c) 2014-17 David Dearing
 */

import java.net.URL;
import java.security.ProtectionDomain;
 
import org.eclipse.jetty.server.HttpConfiguration;
import org.eclipse.jetty.server.HttpConnectionFactory;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.webapp.WebAppContext;
 
/**
 * Embedded Jetty executable WAR main entry point.
 * 
 * See http://uguptablog.blogspot.com/2012/09/embedded-jetty-executable-war-with.html
 */
public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception
	{
		Server server = new Server();

		HttpConfiguration config = new HttpConfiguration();
		ServerConnector http = new ServerConnector(server, new HttpConnectionFactory(config));

		int port = 8080;
		if (args.length > 0) {
			port = Integer.parseInt(args[0]);
		}

		http.setPort(port);
		server.addConnector(http);
		
		ProtectionDomain domain = Main.class.getProtectionDomain();
		URL location = domain.getCodeSource().getLocation();
		WebAppContext webapp = new WebAppContext();
		webapp.setContextPath("/");
		webapp.setWar(location.toExternalForm());
		server.setHandler(webapp);
		
		server.start();
		server.join();
	}
}


================================================
FILE: src/main/java/com/dpdearing/sandbox/gpsemulator/client/GpsEmulator.java
================================================
/**
 * Copyright (c) 2010-17 David Dearing
 */

package com.dpdearing.sandbox.gpsemulator.client;

import com.dpdearing.sandbox.gpsemulator.common.LocationServiceAsync;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.maps.client.LoadApi;
import com.google.gwt.maps.client.MapOptions;
import com.google.gwt.maps.client.MapWidget;
import com.google.gwt.maps.client.base.LatLng;
import com.google.gwt.maps.client.events.click.ClickMapEvent;
import com.google.gwt.maps.client.events.click.ClickMapHandler;
import com.google.gwt.maps.client.overlays.Marker;
import com.google.gwt.maps.client.overlays.MarkerOptions;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.InlineLabel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.google.gwt.user.client.ui.TextBox;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class GpsEmulator implements EntryPoint, ClickMapHandler {
   /**
    * The default emulator hostname port
    */
   static private final String DEFAULT_HOST = "localhost";
   static private final int DEFAULT_PORT = 5554;

   static private final String SUCCESS_STYLE = "success";
   static private final String ERROR_STYLE = "error";

   /**
    * Create a remote service proxy to talk to the server-side Location service.
    */
   private final LocationServiceAsync _service =
         LocationServiceAsync.Util.getInstance();

   /**
    * The map and current marker shown
    */
   private MapWidget _map;
   private Marker _currentMarker = null;

   /**
    * The textboxes, button, and info label for configuring the host and port.
    */
   private TextBox _hostname;
   private TextBox _port;
   private Button _button;
   private Label _info;
   
   /**
    * This is the entry point method.
    */
   public void onModuleLoad() {
      GWT.setUncaughtExceptionHandler(
            new GWT.UncaughtExceptionHandler() {
               public void onUncaughtException(Throwable t) {
                  GWT.log("Client-side uncaught exception", t);
               }
           }
      );

      initializeUI();
      loadMapApi();
   }

   /**
    * Retrieve the Google Maps API key and load the API
    */
   private void loadMapApi() {
      // retrieve the Google Maps API Key and then initialize the UI
      _service.getApiKey(new AsyncCallback<String>() {

         @Override
         public void onFailure(Throwable caught) {
            setErrorMessage(caught.getLocalizedMessage());
         }

         @Override
         public void onSuccess(String apiKey) {
            loadMapApi(apiKey);
         }
      });
   }

   /**
    * Load the GWT Google Maps API using the provided API key.
    *
    * @param apiKey
    */
   private void loadMapApi(String apiKey) {
      final StringBuilder otherParameters = new StringBuilder();
      if (apiKey != null) {
         otherParameters.append("key=");
         otherParameters.append(apiKey);
      }
      GWT.log("LoadApi otherParameters: "+otherParameters.toString());

      LoadApi.go(this::initializeMap, null, false, otherParameters.toString());
   }
   
   /**
    * Initialize the Emulator UI
    */
   private void initializeUI() {
      // Create textboxes and set default hostname and port
      _hostname = new TextBox();
      _hostname.setText(DEFAULT_HOST);
      _hostname.getElement().setPropertyString("placeholder", "hostname");
      _port = new TextBox();
      _port.setText(String.valueOf(DEFAULT_PORT));
      _port.getElement().setPropertyString("placeholder", "port");

      // Create button to connect
      _button = new Button("Connect");
      // Create the info/status label, initially not visible
      _info = new InlineLabel();
      _info.setVisible(false);

      // register the button action
      _button.addClickHandler(new ClickHandler() {
         public void onClick(final ClickEvent event) {
            final String hostname = _hostname.getText();
            final int port = Integer.valueOf(_port.getText());
            new PortAsyncCallback(hostname, port).execute();
         }
      });
      
      // Create panel for textbox, button and info label
      final FlowPanel div = new FlowPanel();
      div.setStylePrimaryName("emulator-controls");
      _hostname.setStyleName("emulator-hostname");
      _port.setStyleName("emulator-port");
      _button.setStyleName("emulator-connect");
      _info.setStyleName("emulator-info");
      div.add(_hostname);
      div.add(_port);
      div.add(_button);
      div.add(_info);

      // add the controls before the map so that the div doesn't cover the map
      RootLayoutPanel.get().add(div);
   }

   /**
    * Initialize the Map widget and default zoom/position
    */
   private void initializeMap() {
      // Create a map centered on Cawker City, KS USA
      final MapOptions opts = MapOptions.newInstance();
      if (opts == null) {
         GWT.log("MapOptions was null");
      }
      final LatLng center = LatLng.newInstance(30.0, 0.00);
      opts.setCenter(center);
      opts.setZoom(2);

      _map = new MapWidget(opts);

      // Register map click handler
      _map.addClickHandler(this);
      RootLayoutPanel.get().add(_map);
   }

      /**
       * Handle a map click event
       */
   public void onEvent(ClickMapEvent clickMapEvent) {
      final LatLng point = clickMapEvent.getMouseEvent().getLatLng();

      // set the location
      new GeoFixAsyncCallback(point.getLatitude(), point.getLongitude()).execute();
   }

   /**
    * Create and add a new marker
    *
    * @param latitude
    * @param longitude
    * @return
    */
   private Marker addMarker(double latitude, double longitude) {
      return addMarker(LatLng.newInstance(latitude, longitude));
   }

   /**
    * Create and add a new marker
    *
    * @param point
    * @return
    */
   private Marker addMarker(LatLng point) {
      MarkerOptions opts = MarkerOptions.newInstance();
      opts.setMap(_map);
      opts.setPosition(point);
      return Marker.newInstance(opts);
   }

   /**
    * Clear the last-placed marker
    */
   private void clearMarker() {
      if (_currentMarker != null) {
         _currentMarker.clear();
      }
   }

   private void setSuccessMessage(String message) {
      _info.addStyleDependentName(SUCCESS_STYLE);
      _info.setText(message);
      _info.setVisible(true);
   }

   private void setErrorMessage(String message) {
      _info.addStyleDependentName(ERROR_STYLE);
      _info.setText(message);
      _info.setVisible(true);
      flash();
   }

   private void clearMessage() {
      _info.setText("");
      _info.removeStyleDependentName(ERROR_STYLE);
      _info.removeStyleDependentName(SUCCESS_STYLE);
      _info.setVisible(false);
      resetFlash();
   }

   private void flash() {
      getFlashElement().addClassName("active");
   }

   private void resetFlash() {
      getFlashElement().removeClassName("active");
   }

   private Element getFlashElement() {
      return Document.get().getElementById("error-flash");
   }

   /**
    * Asynchronous callback for setting the telnet port.
    */
   private class PortAsyncCallback implements AsyncCallback<Void>, Command {
      private final String _hostname;
      private final int _port;
      
      /**
       * Constructor
       *
       * @param hostname the hostname
       * @param port the port
       */
      public PortAsyncCallback(final String hostname, final int port) {
         _hostname = hostname;
         _port = port;
      }
      
      /**
       * Success!
       * 
       * @param result void
       */
      public void onSuccess(final Void result) {
         setSuccessMessage("Connected to " + _hostname + ":" + _port);
      }

      /**
       * Oh no!
       */
      public void onFailure(final Throwable caught) {
         setErrorMessage("Error connecting to " + _hostname + ":" + _port + " - "
               + caught.getLocalizedMessage());
      }
      
      /**
       * Execute service method
       */
      public void execute() {
         // clear the marker and message when (re-)connecting
         clearMarker();
         clearMessage();
         _service.connect(_hostname, _port, this);
      }
   }
   
   /**
    * Asynchronous callback for changing the emulator's location
    */
   private class GeoFixAsyncCallback implements AsyncCallback<Void>, Command {
      private final double _latitude;
      private final double _longitude;

      /**
       * Constructor.
       * 
       * @param latitude
       *           latitude
       * @param longitude
       *           longitude
       */
      public GeoFixAsyncCallback(final double latitude, final double longitude) {
         _latitude = latitude;
         _longitude = longitude;
      }
      
      /**
       * Success!
       * 
       * @param result void
       */
      public void onSuccess(final Void result) {
         // add the new marker
         _currentMarker = addMarker(_latitude, _longitude);
         setSuccessMessage("geo fix " + _longitude + " " + _latitude);
      }
      
      /**
       * Oh no!
       */
      public void onFailure(final Throwable caught) {
         setErrorMessage("Error setting location: " + caught.getLocalizedMessage());
      }

      /**
       * Execute service method
       */
      public void execute() {
         // clear the marker and message before setting new location
         clearMarker();
         clearMessage();
         _service.setLocation(_latitude, _longitude, this);
      }
   }
}


================================================
FILE: src/main/java/com/dpdearing/sandbox/gpsemulator/common/EmulatorCommandException.java
================================================
/**
 * Copyright (c) 2017 David Dearing
 */

package com.dpdearing.sandbox.gpsemulator.common;

import com.google.gwt.user.client.rpc.IsSerializable;

/**
 * A GWT-IsSerializable exception for unexpected events when sending a command to the android emulator.
 */
public class EmulatorCommandException extends Exception implements IsSerializable {
    public EmulatorCommandException() {
        super();
    }

    public EmulatorCommandException(String message) {
        super(message);
    }
}


================================================
FILE: src/main/java/com/dpdearing/sandbox/gpsemulator/common/EmulatorConnectionException.java
================================================
/**
 * Copyright (c) 2017 David Dearing
 */

package com.dpdearing.sandbox.gpsemulator.common;

import com.google.gwt.user.client.rpc.IsSerializable;

/**
 * A GWT-IsSerializable exception for unexpected events when making a connection to the android emulator.
 */
public class EmulatorConnectionException extends Exception implements IsSerializable {
    public EmulatorConnectionException() {
        super();
    }

    public EmulatorConnectionException(String message) {
        super(message);
    }
}


================================================
FILE: src/main/java/com/dpdearing/sandbox/gpsemulator/common/LocationService.java
================================================
/**
 * Copyright (c) 2010-17 David Dearing
 */

package com.dpdearing.sandbox.gpsemulator.common;

import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;

/**
 * The client side stub for the RPC service.
 */
@RemoteServiceRelativePath("location")
public interface LocationService extends RemoteService {
   /**
    * Connect to the hostname and port
    *
    * @param hostname
    *           the hostname
    * @param port
    *           the port number
    * @throws EmulatorConnectionException
    */
   void connect(String hostname, int port) throws EmulatorConnectionException;

   /**
    * Set the geospatial location
    * 
    * @param latitude
    *           latitude
    * @param longitude
    *           longitude
    * @throws EmulatorCommandException
    */
   void setLocation(double latitude, double longitude) throws EmulatorCommandException;

   /**
    * @return the Google Maps API Key
    * @throws EmulatorCommandException
    */
   String getApiKey() throws EmulatorCommandException;
}


================================================
FILE: src/main/java/com/dpdearing/sandbox/gpsemulator/server/LocationServiceImpl.java
================================================
/**
 * Copyright (c) 2010-17 David Dearing
 */

package com.dpdearing.sandbox.gpsemulator.server;

import java.io.File;
import java.io.IOException;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.dpdearing.sandbox.gpsemulator.common.EmulatorCommandException;
import com.dpdearing.sandbox.gpsemulator.common.EmulatorConnectionException;
import com.dpdearing.sandbox.gpsemulator.common.LocationService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

import de.mud.telnet.TelnetWrapper;

/**
 * The server side implementation of the RPC service.
 */
@SuppressWarnings("serial")
public class LocationServiceImpl extends RemoteServiceServlet implements LocationService {

   private static Logger logger =
           Logger.getLogger(LocationServiceImpl.class.getName());

   /**
    * The Google Maps API Key file
    */
   final private File GOOGLE_MAPS_API_KEY_FILE = new File("google_maps_api_key");

   /**
    * The telnet wrapper.
    */
   final private TelnetWrapper _telnet;
   private Boolean _isTelnetActive = false;

   /**
    * The emulator authentication token
    */
   private String _emulator_console_auth_token = null;

   /**
    * Constructor.
    */
   public LocationServiceImpl() {
      _telnet = new TelnetWrapper();

      //TODO does this work on all platforms?
      final String home = System.getProperty("user.home");
      final File authTokenFile = new File(home, ".emulator_console_auth_token");
      try {
         // read the entire contents of the file
         _emulator_console_auth_token = new Scanner(authTokenFile).useDelimiter("\\Z").next();
         logger.info("Loaded emulator_console_auth_token " + _emulator_console_auth_token);
      } catch (IOException ioe) {
         logger.log(Level.SEVERE,
                 "Failed to read the emulator_console_auth_token from " +
                         authTokenFile.getAbsolutePath(),
                 ioe);
      }
   }

   /**
    * {@inheritDoc}
    */
   public void connect(final String hostname, final int port)
         throws EmulatorConnectionException {
      // disconnect from any previous connection
      try {
         _telnet.disconnect();
      } catch (IOException ioe) {
         throw new EmulatorConnectionException(ioe.getMessage());
      }
      _isTelnetActive = false;

      // connect to the specified host
      logger.info("Connecting to emulator at "+ hostname + ":" + port);

      try {
         _telnet.connect(hostname, port);
         _isTelnetActive = true;
      } catch (IOException ioe) {
         throw new EmulatorConnectionException(ioe.getMessage());
      }

      if (_emulator_console_auth_token == null) {
         logger.info("No emulator_console_auth_token; skipping authentication");
      } else {
         logger.info("Authenticating with emulator_console_auth_token: " +
               _emulator_console_auth_token);
         try {
            _telnet.send("auth " + _emulator_console_auth_token);
         } catch (IOException ioe) {
            throw new EmulatorConnectionException(ioe.getMessage());
         }
      }
   }
   
   /**
    * {@inheritDoc}
    */
   public void setLocation(final double latitude, final double longitude)
         throws EmulatorCommandException {
      if (_isTelnetActive) {
         try {
            // telnet the geo fix location: longitude first!
            String geo = "geo fix " + longitude + " " + latitude;
            logger.info("Sending command: " + geo);
            _telnet.send(geo);
         } catch (IOException ioe) {
            throw new EmulatorCommandException(ioe.getMessage());
         } catch (Exception npe) {
            throw new EmulatorCommandException("Unexpected error within telnet connection.");
         }
      }
      else {
         // throw an exception or client will think that setLocation() was a success
         throw new EmulatorCommandException("Not connected to the emulator.");
      }
   }

   /**
    * {@inheritDoc}
    */
   public String getApiKey() throws EmulatorCommandException {
      try {
         return loadGoogleMapsApiKey();
      } catch (IOException ioe) {
         final String message = "Failed to read the Google Maps API Key from " +
               GOOGLE_MAPS_API_KEY_FILE.getAbsolutePath();

         logger.log(Level.SEVERE, message, ioe);
         throw new EmulatorCommandException(message);
      }
   }

   private String loadGoogleMapsApiKey() throws IOException {
      // read the entire contents of the file
      logger.info("Reading Google Maps API Key file at " +
            GOOGLE_MAPS_API_KEY_FILE.getAbsolutePath());
      final String apiKey = new Scanner(GOOGLE_MAPS_API_KEY_FILE).useDelimiter("\\Z").next();
      logger.info("Loaded Google Maps API Key: " + apiKey);
      return apiKey;
   }

}


================================================
FILE: src/main/resources/com/dpdearing/sandbox/gpsemulator/GpsEmulator.gwt.xml
================================================
<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='gpsemulator'>
  <!-- Inherit the core Web Toolkit stuff.                        -->
  <inherits name='com.google.gwt.user.User'/>

  <!-- Inherit the GWT Google Maps stuff.                         -->
  <inherits name='com.google.gwt.maps.Maps' />

  <!-- Inherit the default GWT style sheet.  You can change       -->
  <!-- the theme of your GWT application by uncommenting          -->
  <!-- any one of the following lines.                            -->
  <inherits name='com.google.gwt.user.theme.standard.Standard'/>
  <!-- <inherits name='com.google.gwt.user.theme.chrome.Chrome'/> -->
  <!-- <inherits name='com.google.gwt.user.theme.dark.Dark'/>     -->

  <!-- Other module inherits                                      -->

  <!-- Specify the app entry point class.                         -->
  <entry-point class='com.dpdearing.sandbox.gpsemulator.client.GpsEmulator'/>

  <!-- Specify the paths for translatable code                    -->
  <source path='client'/>
  <source path='common'/>

</module>


================================================
FILE: src/main/webapp/WEB-INF/web.xml
================================================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>
  
  <!-- Servlets -->
  <servlet>
    <servlet-name>locationServlet</servlet-name>
    <servlet-class>com.dpdearing.sandbox.gpsemulator.server.LocationServiceImpl</servlet-class>
  </servlet>
  
  <servlet-mapping>
    <servlet-name>locationServlet</servlet-name>
    <url-pattern>/gpsemulator/location</url-pattern>
  </servlet-mapping>
  
  <!-- Default page to serve -->
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
  </welcome-file-list>

</web-app>


================================================
FILE: src/main/webapp/gpsemulator/index.html
================================================
<!doctype html>
<!-- The DOCTYPE declaration above will set the    -->
<!-- browser's rendering engine into               -->
<!-- "Standards Mode". Replacing this declaration  -->
<!-- with a "Quirks Mode" doctype may lead to some -->
<!-- differences in layout.                        -->

<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title>Android GPS Emulator: Geospatial Location Emulation</title>
    <script type="text/javascript" language="javascript" src="gpsemulator.nocache.js"></script>
    <style type="text/css">
      /* Makes the page fill the window. */
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      body {
        background-color: #d4d4d4 !important;
      }
      .emulator-controls {
        z-index: 1;
        display: inline-block;
        top: 9px !important;
        margin: auto;
        width: 400px;
        pointer-events: none;
      }
      .emulator-hostname {
        margin: 0;
        padding: 8px;
        font-size: 18px;
        font-family: Roboto,Arial,sans-serif;
        pointer-events: initial;
      }
      .emulator-port {
        margin: 0;
        padding: 8px;
        width: 3em;
        font-size: 18px;
        font-family: Roboto,Arial,sans-serif;
        pointer-events: initial;
      }
      .emulator-connect {
        margin: 0 4px;
        padding: 8px;
        font-size: 18px;
        font-family: Roboto,Arial,sans-serif;
        pointer-events: initial;
      }
      .emulator-info {
        display: block;
        margin: 5px 0px;
        padding: 6px;
        border: 1px solid white;
        border-radius: 5px;
        background-color: white;
        font-family: Roboto,Arial,sans-serif;
        font-size: 16px;
        pointer-events: initial;
      }
      .emulator-info-error {
        color: #940000;
        background-color: #f8d7da;
        border-color: #eeaaaa;
      }
      .emulator-info-success {
        color: #155724;
        background-color: #d4edda;
        border-color: #83cb94;
      }
      #error-flash {
        pointer-events: none;
        z-index: 1;
        opacity:0;
        background-color: #c30000;
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
      }
      @-webkit-keyframes flash {
        0% {
          opacity:1;
        }
        50% {
          opacity:.5;
        }
        100% {
          opacity: 0;
        }
      }
      .active {
        -webkit-animation-name: flash;
        -webkit-animation-duration: 200ms;
        -webkit-animation-iteration-count: 1;
        -webkit-animation-timing-function: linear;
        -moz-animation-name: flash;
        -moz-animation-duration: 200ms;
        -moz-animation-iteration-count: 1;
        -moz-animation-timing-function: linear;
      }
    </style>
  </head>

  <body>

    <!-- RECOMMENDED if your web app will not function without JavaScript enabled -->
    <noscript>
      <div style="width: 22em; position: absolute; left: 50%; margin-left: -11em; color: red; background-color: white; border: 1px solid red; padding: 4px; font-family: sans-serif">
        Your web browser must have JavaScript enabled
        in order for this application to display correctly.
      </div>
    </noscript>

    <div id="error-flash"></div>

  </body>
</html>