SnsSubscribe.java

package com.amazon.aws.demo.sns;

import java.util.List;

import com.amazon.aws.demo.AlertActivity;
import com.amazon.aws.demo.R;
import com.amazon.aws.demo.sqs.SimpleQueue;

import android.os.Bundle;
import android.os.Handler;
import android.view.Gravity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;

public class SnsSubscribe extends AlertActivity{

	protected ArrayAdapter<String> topicListAdapter;
	protected ArrayAdapter<String> queueListAdapter;
	protected Spinner topicSpinner;
	protected Spinner protocolSpinner;
	protected EditText endpointInput;
	protected TextView topicIntro;
	protected TextView protoIntro;
	protected TextView endpointIntro;
	protected Spinner endpointSpinner;
	protected Button submitButton;
	protected Handler mHandler;
	protected List<String> topicArns;
	protected List<String> queueUrls;
	private int inputTextStatus;
	
	public static final int INPUT_TEXT_ON = 0;
	public static final int INPUT_TEXT_OFF = 1;
	public static final int POLICY_PROPAGATION_TIME_IN_SECONDS = 12;
	
	private Runnable postResults = new Runnable() {
		@Override
		public void run(){
			updateUi();
		}
	};
	
	private Runnable postDone = new Runnable() {
		@Override
		public void run(){
			finish();
		}
	};
	
	private Runnable postProp = new Runnable() {
		@Override
		public void run(){
			clearUi();
		}
	};
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sns_subscribe);
        topicSpinner = (Spinner) findViewById(R.id.sns_sub_topic_spinner);
        protocolSpinner = (Spinner) findViewById(R.id.sns_sub_protocol_spinner);
        endpointSpinner = (Spinner) findViewById(R.id.sns_sub_endpoint_spinner);
        endpointInput = (EditText) findViewById(R.id.sns_sub_endpoint_input);
        submitButton = (Button) findViewById(R.id.sns_sub_submit_button);
        topicIntro = (TextView) findViewById(R.id.sns_sub_topic_intro_text);
        protoIntro = (TextView) findViewById(R.id.sns_sub_protocol_intro_text);
        endpointIntro = (TextView) findViewById(R.id.sns_sub_endpoint_intro_text);
        mHandler = new Handler();
        inputTextStatus = INPUT_TEXT_ON;
        getTopicArn();
        wireOnSelect();
    }
    
    private void getTopicArn(){
    	Thread t = new Thread(){
    		@Override
    		public void run(){
    			try{
	    			topicArns = SimpleNotification.getTopicNames();
	    			queueUrls = SimpleQueue.getQueueUrls();
	    			mHandler.post(postResults);
    			} catch(Throwable e){
    				setStackAndPost(e);
    			}
    		}
    	};
    	t.start();
    }
    
    private void subscribeQueue(String url, String arn){
    	final String tUrl = url;
    	final String tArn = arn;
    	Thread t = new Thread(){
    		@Override
    		public void run(){
    			try {
	    			SimpleQueue.allowNotifications(tUrl,tArn);
	    			mHandler.post(postProp);
    			} catch (Throwable e) {
    				setStackAndPost(e);
    			}
    			try {
					Thread.sleep(POLICY_PROPAGATION_TIME_IN_SECONDS * 1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				try {
	    			String end = SimpleQueue.getQueueArn(tUrl);
	    			SimpleNotification.subscribe(tArn, (String)protocolSpinner.getSelectedItem(), end);
	    			mHandler.post(postDone);
				} catch(Throwable e) {
    				setStackAndPost(e);
				}
    		}
    	};
		t.start();
		
    }
    
    private void wireSubmitButton(){
    	submitButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				topicSpinner.setVisibility(View.INVISIBLE);
				protocolSpinner.setVisibility(View.INVISIBLE);
				String arn = (String)topicSpinner.getSelectedItem().toString();
				if(inputTextStatus == INPUT_TEXT_ON) {
					endpointInput.setVisibility(View.GONE);
					try {
						SimpleNotification.subscribe(arn, (String)protocolSpinner.getSelectedItem(), endpointInput.getText().toString());
						finish();
					} catch (Throwable e ) {
	    				setStackAndPost(e);					}
				} else {
					endpointSpinner.setVisibility(View.GONE);
					String url = (String)endpointSpinner.getSelectedItem().toString();
					subscribeQueue(url, arn);
				}

				
			}
		});
   }
    
    private void wireOnSelect(){
    	protocolSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

			@Override
			public void onItemSelected(AdapterView<?> parent, View view,
					int position, long id) {
				//Show Spinner for SQS
				if (position == 4) {
					swapField(INPUT_TEXT_OFF);
				} else {
					swapField(INPUT_TEXT_ON);
				}
				//Prefix web requests
				if(position == 0) {
					endpointInput.setText("http://");
				} else if (position == 1){
					endpointInput.setText("https://");
				} else {
					endpointInput.setText("");
				}
			}

			@Override
			public void onNothingSelected(AdapterView<?> parent) {
			}

    		
    	});
    }
    
    private void updateUi(){
    	topicListAdapter = new ArrayAdapter<String>(this, R.layout.spinner_item, topicArns);
    	queueListAdapter = new ArrayAdapter<String>(this, R.layout.spinner_item, queueUrls);
    	topicSpinner.setAdapter(topicListAdapter);
    	endpointSpinner.setAdapter(queueListAdapter);
    	topicSpinner.setVisibility(View.VISIBLE);
        wireSubmitButton();
    }
    
    private void clearUi(){
    	submitButton.setVisibility(View.INVISIBLE);
    	topicIntro.setVisibility(View.INVISIBLE);
    	protoIntro.setVisibility(View.INVISIBLE);
    	endpointIntro.setText("Waiting for 12 Seconds For Subscribe to Propagate. . .");
    	endpointIntro.setGravity(Gravity.CENTER);
    }
    
    private void swapField(int i) {
    	if(i == INPUT_TEXT_ON && inputTextStatus == INPUT_TEXT_OFF) {
    		endpointSpinner.setVisibility(View.GONE);
    		endpointInput.setVisibility(View.VISIBLE);
    		inputTextStatus = INPUT_TEXT_ON;
    	} else if(i == INPUT_TEXT_OFF && inputTextStatus == INPUT_TEXT_ON) {
    		endpointInput.setVisibility(View.GONE);
    		endpointSpinner.setVisibility(View.VISIBLE);
    		inputTextStatus = INPUT_TEXT_OFF;
    	}
    }
}