Android Open Source - android-rackspacecloud Confirm Resize Activity

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License

The source code is released under:
MIT License
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Java Source Code

package com.rackspacecloud.android;
//from  w  w  w . j ava  2  s .  c o  m
import java.io.IOException;
import java.io.StringReader;

import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.impl.client.BasicResponseHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;

import com.rackspace.cloud.servers.api.client.CloudServersException;
import com.rackspace.cloud.servers.api.client.Server;
import com.rackspace.cloud.servers.api.client.ServerManager;
import com.rackspace.cloud.servers.api.client.http.HttpBundle;
import com.rackspace.cloud.servers.api.client.parsers.CloudServersFaultXMLParser;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.Toast;

public class ConfirmResizeActivity extends Activity {

  private Context context;
  private Server server;
  
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    setContentView(R.layout.viewresize);     
    server = (Server) this.getIntent().getExtras().get("server");
    context = getApplicationContext();
    restoreState(savedInstanceState);
  }
  
  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putSerializable("server", server);
  }
  
  private void restoreState(Bundle state) {
    if (server == null && state != null && state.containsKey("server")) {
      server = (Server) state.getSerializable("server");
    }
    setupButtons();
  }

  private void setupButtons(){
    Button confirm = (Button)findViewById(R.id.confirm_resize_button);
    confirm.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        new ConfirmResizeTask().execute((Void[]) null);
        finish();
      }
    });

    Button rollback = (Button)findViewById(R.id.rollback_server_button);
    rollback.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        new RollbackResizeTask().execute((Void[]) null);  
        finish();
      }
    });
  }
  
  private CloudServersException parseCloudServersException(HttpResponse response) {
    CloudServersException cse = new CloudServersException();
    try {
      BasicResponseHandler responseHandler = new BasicResponseHandler();
      String body = responseHandler.handleResponse(response);
      CloudServersFaultXMLParser parser = new CloudServersFaultXMLParser();
      SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
      XMLReader xmlReader = saxParser.getXMLReader();
      xmlReader.setContentHandler(parser);
      xmlReader.parse(new InputSource(new StringReader(body)));          
      cse = parser.getException();          
    } catch (ClientProtocolException e) {
      cse = new CloudServersException();
      cse.setMessage(e.getLocalizedMessage());
    } catch (IOException e) {
      cse = new CloudServersException();
      cse.setMessage(e.getLocalizedMessage());
    } catch (ParserConfigurationException e) {
      cse = new CloudServersException();
      cse.setMessage(e.getLocalizedMessage());
    } catch (SAXException e) {
      cse = new CloudServersException();
      cse.setMessage(e.getLocalizedMessage());
    } catch (FactoryConfigurationError e) {
      cse = new CloudServersException();
      cse.setMessage(e.getLocalizedMessage());
    }
    return cse;
  }
  
  private void startServerError(String message, HttpBundle bundle){
    Intent viewIntent = new Intent(getApplicationContext(), ServerErrorActivity.class);
    viewIntent.putExtra("errorMessage", message);
    viewIntent.putExtra("response", bundle.getResponseText());
    viewIntent.putExtra("request", bundle.getCurlRequest());
    startActivity(viewIntent);
  }
  
  private void showToast(String message) {
    Context context = getApplicationContext();
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(context, message, duration);
    toast.show();
  }
  
  private class ConfirmResizeTask extends AsyncTask<Void, Void, HttpBundle> {

    private CloudServersException exception;

    @Override
    //let user know their process has started
    protected void onPreExecute(){
      showToast("Confirm process has begun");
    }

    @Override
    protected HttpBundle doInBackground(Void... arg0) {
      HttpBundle bundle = null;
      try {
        bundle = (new ServerManager()).confirmResize(server, context);
      } catch (CloudServersException e) {
        exception = e;
      }
      return bundle;
    }

    @Override
    protected void onPostExecute(HttpBundle bundle) {
      HttpResponse response = bundle.getResponse();
      if (response != null) {
        int statusCode = response.getStatusLine().getStatusCode();  
        if(statusCode == 204){ showToast("Server resize was successfully confirmed."); }
        else {
          CloudServersException cse = parseCloudServersException(response);
          if ("".equals(cse.getMessage())) {
            startServerError("There was a problem confirming your resize.", bundle);
          } else {
            startServerError("There was a problem confirming your resize." + cse.getMessage(), bundle);
          }
        }
      } else if (exception != null) {
        startServerError("There was a problem confirming your resize." + exception.getMessage(), bundle);

      }
    }
  }
  
  
  private class RollbackResizeTask extends AsyncTask<Void, Void, HttpBundle> {

    private CloudServersException exception;

    @Override
    //let user know their process has started
    protected void onPreExecute(){
      showToast("Reverting your server.");
    }

    @Override
    protected HttpBundle doInBackground(Void... arg0) {
      HttpBundle bundle = null;
      try {
        bundle = (new ServerManager()).revertResize(server, context);
      } catch (CloudServersException e) {
        exception = e;
      }
      return bundle;
    }

    @Override
    protected void onPostExecute(HttpBundle bundle) {
      HttpResponse response = bundle.getResponse();
      if (response != null) {
        int statusCode = response.getStatusLine().getStatusCode();  
        if(statusCode == 202){ showToast("Server was successfully reverted."); }
        else {
          CloudServersException cse = parseCloudServersException(response);
          if ("".equals(cse.getMessage())) {
            startServerError("There was a problem reverting your server.", bundle);
          } else {
            startServerError("There was a problem reverting your server." + cse.getMessage(), bundle);
          }
        }
      } else if (exception != null) {
        startServerError("There was a problem reverting your server." + exception.getMessage(), bundle);

      }
    }
  }
  
}
Java Source Code List
