Android Open Source - andro_auto_framework Command Transmitter

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License

The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCT...

Java Source Code

package org.imaginea.botbot;
// w w  w. j  a  v  a  2  s. c o m
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.net.HttpURLConnection;
import java.net.Socket;
import java.net.URL;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;

import android.os.AsyncTask;
import android.util.Log;



public class CommandTransmitter {
  Socket soc = null;
  PrintStream ps = null;
  static ServerProperties sp = new ServerProperties();
  static String sessionID = null;
  static String tempSession=null;
  String serverIP = sp.serverIP;
  String port=sp.port;
  String sessionName=sp.sessionName;
  String serverName=sp.serverName;
  BlockingQueue<String> queue = new LinkedBlockingQueue<String>();
  static String sUrl="";
  
  public CommandTransmitter() {
    if(!serverName.equalsIgnoreCase("")){
      sUrl="http://" + serverIP +":"+port+"/"+serverName;
    }else{
      sUrl="http://" + serverIP +":"+port;
    }
    System.out.println("Creating session....");
    new CreateSessionTask().execute();

  }

  public void publish(Command command) {
    queue.offer(command.getData());
    
  }

  public boolean checkSession(String id) {
    try {
      URL url = null;
      url = new URL(sUrl+"/api/recordsessions/" + id);
      HttpURLConnection connection = (HttpURLConnection) url
          .openConnection();
      connection.setDoInput(true);
      connection.setRequestProperty("Accept", "application/json");
      connection.setRequestProperty("Content-Type",
          "application/json; charset=UTF-8");
      BufferedReader in = new BufferedReader(new InputStreamReader(
          connection.getInputStream()));
      String inputLine;
      while ((inputLine = in.readLine()) != null)
        System.out.println(inputLine);
      in.close();
      return true;
    } catch (Exception e) {
      return false;
    }
  }

  
  /**
   * @author moiz
   * 
   * CreateSessionTask is a sub class to create an AsyncTask
   * AsyncTask is a thread which runs  parallel to the main UI thread.
   *  
   *
   */
  

  class CreateSessionTask extends AsyncTask<Void, Void, Void> {
    int recordID=1;
    int prevRecord=1;
    /**
     * This method is called when CreateSessionTask.execute() is invoked.
     * This method performs two actions, first it creates a session and then it waits for population of
     * queue in a while loop, when queue is not empty it removes the head and writes the data to the server.
     */
    @Override
    protected Void doInBackground(Void... nothing) {

      // creating session
        System.out.println("In background");
        recordID=1;
        prevRecord=0;
        
      while (true) {

        try {
          String data=queue.take();
          String session=getSession();
          //it waits until queue is populated
          postRecord(data,session);
        } catch (InterruptedException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
      }

    }
    //Performs writing data to the server

    void postRecord(String data,String session) {
      // TODO Auto-generated method stub
      if (!session.equalsIgnoreCase("")) {
        try {
          DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
          String currentDateTime = df.format(new Date());

          Log.i("bot-bot", "In create record Async task:- " + session
              + data);
          String postData = "{\"entryNo\":\"" + recordID + "\","
              + "\"prevEntryNo\":\"" + prevRecord
              + "\",\"recordSession\":{\"id\":\"" + session
              + "\"},\"entryTime\":\"" + currentDateTime
              + "\",\"payload\":\"" + data + "\"}";
          Log.i("bot-bot", postData);
          URL url = null;
          url = new URL(sUrl + "/api/recordentries");
          HttpURLConnection connection = (HttpURLConnection) url
              .openConnection();
          connection.setDoOutput(true);
          connection.setRequestProperty("Accept", "application/json");
          connection.setRequestProperty("Content-Type",
              "application/json; charset=UTF-8");
          OutputStreamWriter out = new OutputStreamWriter(
              connection.getOutputStream());

          out.write(postData);
          out.close();
          prevRecord = recordID;
          recordID++;
          Map<String, List<String>> respHeaders = connection
              .getHeaderFields();

          if (connection.getResponseCode() == 201) {
            if (respHeaders.containsKey("Location")) {
              Log.i("bot-bot", respHeaders.get("Location")
                  .toString());
            } else {
              Log.i("bot-bot", respHeaders.get("location")
                  .toString());
            }
          } else {
            Log.i("bot-bot", "Invalid Response");
          }
          BufferedReader in = new BufferedReader(
              new InputStreamReader(connection.getInputStream()));
          String inputLine;
          while ((inputLine = in.readLine()) != null)
            System.out.println(inputLine);
          in.close();
        } catch (Exception e) {
          Log.i("bot-bot", "Exception occured in postMethod: "+e.getMessage());
        }
      } else {
        Log.i("bot-bot",
            "Inside post record. Data not posted as session was empty.");
      }

    }
    
    String getSession(){
      String session = "";
      if (CommandTransmitter.sessionID == null
          || CommandTransmitter.sessionID.contentEquals("")) {
        CommandTransmitter.sessionID=createNewSession();
        session = CommandTransmitter.sessionID;
      } else {
        try {
          URL url = new URL(sUrl + "/api/recordsessions/"+CommandTransmitter.sessionID);
          HttpURLConnection connection = (HttpURLConnection) url
              .openConnection();
          BufferedReader rd = new BufferedReader(
              new InputStreamReader(connection.getInputStream()));
          StringBuffer sb = new StringBuffer();
          String line;
          while (rd.ready()) {
            line = rd.readLine();
            sb.append(line);
          }
          rd.close();
          String result = sb.toString();
          String status = result.substring(
              result.indexOf("<status>") + 8,
              result.indexOf("</status>"));
          if (status.contentEquals("stopped")) {
            recordID=1;
            prevRecord=0;
            CommandTransmitter.sessionID = createNewSession();
            session = CommandTransmitter.sessionID;
          } else if (status.contentEquals("started")) {
            session = CommandTransmitter.sessionID;
          }
        } catch (IOException e) {
          Log.i("bot-bot",
              "Unable to get status of the record. Application will continue without recording");
          Log.i("bot-bot","Url is : "+ sUrl + "/api/recordsessions/"+CommandTransmitter.sessionID);
          Log.i("bot-bot", "Error is: "+e.toString());
        }
      }
      return session;
    }
    
    String createNewSession() {
      String genSessionId = "";
      try{
        URL url = null;
        url = new URL(sUrl + "/api/recordsessions");
        HttpURLConnection connection = (HttpURLConnection) url
            .openConnection();
        connection.setDoOutput(true);
        connection.setRequestProperty("Accept", "application/json");
        connection.setRequestProperty("Content-Type",
            "application/json; charset=UTF-8");
        OutputStreamWriter out = new OutputStreamWriter(
            connection.getOutputStream());
        out.write("{\n\"name\":\"" + sessionName + "\",\"status\":\"started\"\n}");
        out.close();

        Map<String, List<String>> respHeaders = connection
            .getHeaderFields();

        if (connection.getResponseCode() == 201) {
          String temp;
          if (respHeaders.containsKey("Location")) {
            temp = respHeaders.get("Location").get(0);
          } else {
            temp = respHeaders.get("location").get(0);
          }

          genSessionId = temp.substring(temp
              .lastIndexOf("/") + 1);
          Log.i("TASK", "Session ID received: "
              + genSessionId);
        } else {
          throw new Exception("Invalid responce");
        }
      }catch(Exception e){
        Log.i("bot-bot","Unable to create record because of :" + e);
        Log.i("bot-bot","System will continue to work without recording.");
      }

      return genSessionId;
    }
  }

}

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