keep messages waiting to be sent in memory; if forwarding fails (in either direction), retry a few times (1m, 10m, 1h, 1d) before giving up; add menu button to retry sending now

AndroidManifest.xml

@@ -29,9 +29,6 @@
         </receiver> 		
 
         <receiver android:name=".MessageStatusNotifier">
-            <intent-filter>                
-                <action android:name="org.envaya.kalsms.SEND_STATUS" />
-            </intent-filter>            
         </receiver>
 
         <receiver android:name=".OutgoingMessagePoller">

res/menu/mainmenu.xml

@@ -12,4 +12,7 @@
     <item android:id="@+id/help"
             android:icon="@drawable/ic_menu_puzzle"
           android:title="@string/help" />                    
+    <item android:id="@+id/retry_now"
+            android:icon="@drawable/ic_menu_magnet"
+          android:title="@string/retry_now" />          
 </menu>

res/values/strings.xml

@@ -5,4 +5,5 @@
     <string name="test">Test Connection</string>
     <string name="check_now">Check Messages</string>
     <string name="help">Help</string>
+    <string name="retry_now">Retry</string>
 </resources>

src/org/envaya/kalsms/App.java

@@ -4,25 +4,24 @@
  */
 package org.envaya.kalsms;
 
+import android.app.Activity;
 import android.app.AlarmManager;
 import android.app.PendingIntent;
-import android.content.ContentValues;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.database.Cursor;
-import android.database.sqlite.SQLiteDatabase;
 import android.os.SystemClock;
 import android.preference.PreferenceManager;
 import android.telephony.SmsManager;
+import android.telephony.SmsMessage;
 import android.util.Log;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
 import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
-import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.message.BasicNameValuePair;
-import org.apache.http.params.BasicHttpParams;
-import org.apache.http.params.HttpConnectionParams;
-import org.apache.http.params.HttpParams;
 
 public class App {
     
@@ -36,19 +35,85 @@ public class App {
     
     public static final String LOG_NAME = "KALSMS";
     public static final String LOG_INTENT = "org.envaya.kalsms.LOG";
-    public static final String SEND_STATUS_INTENT = "org.envaya.kalsms.SEND_STATUS";
+    
+    private static App app;    
+    
+    private Map<String, QueuedIncomingSms> incomingSmsMap = new HashMap<String, QueuedIncomingSms>();
+    private Map<String, QueuedOutgoingSms> outgoingSmsMap  = new HashMap<String, QueuedOutgoingSms>();           
     
     public Context context;
     public SharedPreferences settings;
     
+    private class QueuedMessage<T>
+    {
+        public T sms;
+        public long nextAttemptTime = 0;
+        public int numAttempts = 0;                     
+                
+        public boolean canAttemptNow()
+        {
+            return (nextAttemptTime > 0 && nextAttemptTime < System.currentTimeMillis());
+        }
+                
+        public boolean scheduleNextAttempt()
+        {            
+            long now = System.currentTimeMillis();       
+            numAttempts++;
+            
+            int sec = 1000;
+            
+            if (numAttempts == 1)
+            {
+                log("1st failure; retry in 1 minute");
+                nextAttemptTime = now + sec * 60; // 1 minute
+                return true;
+            }
+            else if (numAttempts == 2)
+            {
+                log("2nd failure; retry in 10 minutes");
+                nextAttemptTime = now + sec * 60 * 10; // 10 min
+                return true;
+            }
+            else if (numAttempts == 3)
+            {
+                log("3rd failure; retry in 1 hour");
+                nextAttemptTime = now + sec * 60 * 60; // 1 hour
+                return true;
+            }
+            else if (numAttempts == 4)
+            {
+                log("4th failure: retry in 1 day");
+                nextAttemptTime = now + sec * 60 * 60 * 24; // 1 day
+                return true;
+            }            
+            else
+            {
+                log("5th failure: giving up");
+                return false;
+            }
+        }
+    }                            
+    
+    private class QueuedIncomingSms extends QueuedMessage<SmsMessage> {
+        public QueuedIncomingSms(SmsMessage sms)
+        {
+            this.sms = sms;
+        }
+    }
+    
+    private class QueuedOutgoingSms extends QueuedMessage<OutgoingSmsMessage> {
+        public QueuedOutgoingSms(OutgoingSmsMessage sms)
+        {
+            this.sms = sms;
+        }        
+    }            
+    
     protected App(Context context)
     {
         this.context = context;
         this.settings = PreferenceManager.getDefaultSharedPreferences(context);
     }
     
-    private static App app;
-    
     public static App getInstance(Context context)
     {
         if (app == null)
@@ -58,7 +123,7 @@ public class App {
         return app;
     }
     
-    static void debug(String msg)
+    public void debug(String msg)
     {
         Log.d(LOG_NAME, msg);          
     }
@@ -176,49 +241,156 @@ public class App {
         return settings.getString("password", "");
     }               
         
-    public SQLiteDatabase getWritableDatabase()
+    private void notifyStatus(OutgoingSmsMessage sms, String status, String errorMessage)
-    {
-        return new DBHelper(context).getWritableDatabase();        
-    }
-    
-    public HttpClient getHttpClient()
-    {
-        HttpParams httpParameters = new BasicHttpParams();
-        HttpConnectionParams.setConnectionTimeout(httpParameters, 8000);
-        HttpConnectionParams.setSoTimeout(httpParameters, 8000);                    
-        return new DefaultHttpClient(httpParameters);        
-    }        
-    
-    public void sendSMS(OutgoingSmsMessage sms)
     {
         String serverId = sms.getServerId();
         
+        String logMessage;
+        if (status.equals(App.STATUS_SENT))
+        {
+            logMessage = "sent successfully"; 
+        }
+        else if (status.equals(App.STATUS_FAILED))
+        {
+            logMessage = "could not be sent (" + errorMessage + ")";
+        }
+        else
+        {
+            logMessage = "queued";
+        }
+        String smsDesc = sms.getLogName();
+        
         if (serverId != null)
         {        
-            SQLiteDatabase db = this.getWritableDatabase();
+            app.log("Notifying server " + smsDesc + " " + logMessage);            
-            Cursor cursor = 
-                db.rawQuery("select 1 from sms_status where server_id=?", new String[] { serverId });
 
-            boolean exists = (cursor.getCount() > 0);
+            new HttpTask(app).execute(
-            cursor.close();
+                new BasicNameValuePair("id", serverId),
-            if (exists)
+                new BasicNameValuePair("status", status),
+                new BasicNameValuePair("error", errorMessage),
+                new BasicNameValuePair("action", App.ACTION_SEND_STATUS)
+            );
+        }
+        else
+        {
+            app.log(smsDesc + " " + logMessage);
+        }
+    }
+    
+    public synchronized void retryStuckMessages(boolean retryAll)
+    {
+        retryStuckOutgoingMessages(retryAll);
+        retryStuckIncomingMessages(retryAll);
+    }
+    
+    public synchronized int getStuckMessageCount()
+    {
+        return outgoingSmsMap.size() + incomingSmsMap.size();
+    }
+    
+    public synchronized void retryStuckOutgoingMessages(boolean retryAll)
+    {
+        for (Entry<String, QueuedOutgoingSms> entry : outgoingSmsMap.entrySet())
+        {
+            QueuedOutgoingSms queuedSms = entry.getValue();
+            if (retryAll || queuedSms.canAttemptNow())
             {
-                log(sms.getLogName() + " already sent, skipping");
+                queuedSms.nextAttemptTime = 0;                
-                return;
+                
+                log("Retrying sending " +queuedSms.sms.getLogName() 
+                        + " to " + queuedSms.sms.getTo());
+                
+                trySendSMS(queuedSms.sms);
             }            
+        }
+    }
         
-            ContentValues values = new ContentValues();
+    public synchronized void retryStuckIncomingMessages(boolean retryAll)
-            values.put("server_id", serverId);
+    {        
-            values.put("status", App.STATUS_QUEUED);
+        for (Entry<String, QueuedIncomingSms> entry : incomingSmsMap.entrySet())
-            db.insert("sms_status", null, values);
+        {
+            QueuedIncomingSms queuedSms = entry.getValue();
+            if (retryAll || queuedSms.canAttemptNow())
+            {
+                queuedSms.nextAttemptTime = 0;                
                 
-            db.close();
+                log("Retrying forwarding SMS from " + queuedSms.sms.getOriginatingAddress());
+                
+                trySendMessageToServer(queuedSms.sms);
+            }            
+        }        
+    }
+    
+    public synchronized void notifyOutgoingMessageStatus(String id, int resultCode)
+    {
+        QueuedOutgoingSms queuedSms = outgoingSmsMap.get(id);
+        
+        if (queuedSms == null)
+        {
+            return;
         }
         
+        OutgoingSmsMessage sms = queuedSms.sms;                
+        
+        switch (resultCode) {
+            case Activity.RESULT_OK:
+                this.notifyStatus(sms, App.STATUS_SENT, "");
+                break;
+            case SmsManager.RESULT_ERROR_GENERIC_FAILURE:                                
+                this.notifyStatus(sms, App.STATUS_FAILED, "generic failure");
+                break;
+            case SmsManager.RESULT_ERROR_RADIO_OFF:
+                this.notifyStatus(sms, App.STATUS_FAILED, "radio off");
+                break;
+            case SmsManager.RESULT_ERROR_NO_SERVICE:
+                this.notifyStatus(sms, App.STATUS_FAILED, "no service");
+                break;
+            case SmsManager.RESULT_ERROR_NULL_PDU:     
+                this.notifyStatus(sms, App.STATUS_FAILED, "null PDU");
+                break;
+            default:
+                this.notifyStatus(sms, App.STATUS_FAILED, "unknown error");
+                break;
+        }
+
+        switch (resultCode) {            
+            case SmsManager.RESULT_ERROR_GENERIC_FAILURE:                
+            case SmsManager.RESULT_ERROR_RADIO_OFF:
+            case SmsManager.RESULT_ERROR_NO_SERVICE:
+                if (!queuedSms.scheduleNextAttempt())
+                {                    
+                    outgoingSmsMap.remove(id);
+                }
+                break;
+            default:
+                outgoingSmsMap.remove(id);
+                break;
+        }        
+        
+    }
+    
+    public synchronized void sendSMS(OutgoingSmsMessage sms)
+    {       
+        String id = sms.getId();
+        if (outgoingSmsMap.containsKey(id))
+        {
+            log(sms.getLogName() + " already sent, skipping");
+            return;
+        }
+
+        QueuedOutgoingSms queueEntry = new QueuedOutgoingSms(sms);
+        outgoingSmsMap.put(id, queueEntry);
+        
+        log("Sending " +sms.getLogName() + " to " + sms.getTo());        
+        trySendSMS(sms);
+    }
+    
+    private void trySendSMS(OutgoingSmsMessage sms)
+    {
         SmsManager smgr = SmsManager.getDefault();
                 
-        Intent intent = new Intent(App.SEND_STATUS_INTENT);
+        Intent intent = new Intent(context, MessageStatusNotifier.class);
-        intent.putExtra("serverId", serverId);
+        intent.putExtra("id", sms.getId());
         
         PendingIntent sentIntent = PendingIntent.getBroadcast(
                 this.context,
@@ -226,7 +398,6 @@ public class App {
                 intent,
                 PendingIntent.FLAG_ONE_SHOT);
                 
-        log("Sending " +sms.getLogName() + " to " + sms.getTo());
         smgr.sendTextMessage(sms.getTo(), null, sms.getMessage(), sentIntent, null);        
     }
     
@@ -245,4 +416,86 @@ public class App {
         }                
     }
     
+
+    private class ForwarderTask extends HttpTask {
+
+        private SmsMessage originalSms;
+
+        public ForwarderTask(SmsMessage originalSms) {
+            super(app);
+            this.originalSms = originalSms;
+        }
+
+        @Override
+        protected String getDefaultToAddress()
+        {
+            return originalSms.getOriginatingAddress();
+        }        
+                
+        @Override
+        protected void handleResponse(HttpResponse response) throws Exception {
+            
+            for (OutgoingSmsMessage reply : parseResponseXML(response)) {
+                app.sendSMS(reply);
+            }                                        
+            
+            app.notifyIncomingMessageStatus(originalSms, true);            
+        }
+        
+        @Override
+        protected void handleFailure()
+        {
+            app.notifyIncomingMessageStatus(originalSms, false);
+        }        
+    }        
+    
+    private String getSmsId(SmsMessage sms)
+    {
+        return sms.getOriginatingAddress() + ":" + sms.getMessageBody() + ":" + sms.getTimestampMillis();
+    }
+    
+    public synchronized void sendMessageToServer(SmsMessage sms) 
+    {
+        String id = getSmsId(sms);
+        if (incomingSmsMap.containsKey(id))
+        {
+            log("Duplicate incoming SMS, skipping");
+            return;
+        }        
+                
+        QueuedIncomingSms queuedSms = new QueuedIncomingSms(sms);        
+        incomingSmsMap.put(id, queuedSms);
+                
+        app.log("Received SMS from " + sms.getOriginatingAddress());
+        
+        trySendMessageToServer(sms);
+    }    
+    
+    public void trySendMessageToServer(SmsMessage sms) 
+    {
+        String message = sms.getMessageBody();
+        String sender = sms.getOriginatingAddress();
+        
+        new ForwarderTask(sms).execute(
+            new BasicNameValuePair("from", sender),
+            new BasicNameValuePair("message", message),
+            new BasicNameValuePair("action", App.ACTION_INCOMING)
+        );
+
+    }
+    
+    private synchronized void notifyIncomingMessageStatus(SmsMessage sms, boolean success)
+    {
+        String id = getSmsId(sms);
+
+        QueuedIncomingSms queuedSms = incomingSmsMap.get(id);
+        
+        if (queuedSms != null)
+        {
+            if (success || !queuedSms.scheduleNextAttempt())
+            {             
+                incomingSmsMap.remove(id);
+            }               
+        }
+    }
 }

src/org/envaya/kalsms/DBHelper.java

@@ -1,43 +0,0 @@
-/*
- * To change this template, choose Tools | Templates
- * and open the template in the editor.
- */
-package org.envaya.kalsms;
-
-import android.content.Context;
-import android.database.sqlite.SQLiteDatabase;
-import android.database.sqlite.SQLiteOpenHelper;
-
-/**
- *
- * @author Jesse
- */
-public class DBHelper extends SQLiteOpenHelper {
-
-    private static final int DATABASE_VERSION = 2;
-    private static final String DATABASE_NAME = "org.envaya.kalsms.db";
-    
-    private static final String SMS_STATUS_TABLE_DROP = 
-       " DROP TABLE sms_status;";
-    
-    private static final String SMS_STATUS_TABLE_CREATE = 
-        "CREATE TABLE sms_status (server_id text, status int);"
-        + "CREATE INDEX server_id_index ON sent_sms (server_id);";
-
-    public DBHelper(Context context) {
-        super(context, DATABASE_NAME, null, DATABASE_VERSION);
-    }
-
-    @Override
-    public void onCreate(SQLiteDatabase db) {
-        db.execSQL(SMS_STATUS_TABLE_CREATE);
-    }
-    
-    @Override
-    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
-        if (oldVersion < 2)
-        {
-            db.execSQL(SMS_STATUS_TABLE_CREATE);
-        }        
-    }    
-}    

src/org/envaya/kalsms/HttpTask.java

@@ -19,7 +19,11 @@ import org.apache.http.HttpResponse;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
 import org.apache.http.client.methods.HttpPost;
+import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.params.BasicHttpParams;
+import org.apache.http.params.HttpConnectionParams;
+import org.apache.http.params.HttpParams;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
@@ -36,6 +40,14 @@ public class HttpTask extends AsyncTask<BasicNameValuePair, Void, HttpResponse>
         this.app = app;
     }
         
+    public HttpClient getHttpClient()
+    {
+        HttpParams httpParameters = new BasicHttpParams();
+        HttpConnectionParams.setConnectionTimeout(httpParameters, 8000);
+        HttpConnectionParams.setSoTimeout(httpParameters, 8000);                    
+        return new DefaultHttpClient(httpParameters);        
+    }            
+    
     private String getSignature(String url, BasicNameValuePair... params)
     {
         try {
@@ -78,6 +90,12 @@ public class HttpTask extends AsyncTask<BasicNameValuePair, Void, HttpResponse>
         try
         {  
             String url = app.getServerUrl();
+            
+            if (url.length() == 0) {
+                app.log("Can't contact server; Server URL not set");                        
+                return null;
+            }            
+            
             HttpPost post = new HttpPost(url);
                        
             post.setEntity(new UrlEncodedFormEntity(Arrays.asList(params)));            
@@ -88,7 +106,7 @@ public class HttpTask extends AsyncTask<BasicNameValuePair, Void, HttpResponse>
             post.setHeader("X-Kalsms-PhoneNumber", app.getPhoneNumber());
             post.setHeader("X-Kalsms-Signature", signature);
             
-            HttpClient client = app.getHttpClient();
+            HttpClient client = getHttpClient();
             HttpResponse response = client.execute(post);            
             
             int statusCode = response.getStatusLine().getStatusCode();

src/org/envaya/kalsms/IncomingMessageForwarder.java

@@ -5,8 +5,6 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.telephony.SmsMessage;
-import java.util.ArrayList;
-import java.util.List;
 import org.apache.http.HttpResponse;
 
 import org.apache.http.message.BasicNameValuePair;
@@ -15,70 +13,6 @@ public class IncomingMessageForwarder extends BroadcastReceiver {
 
     private App app;   
 
-    private List<SmsStatus> retryList = new ArrayList<SmsStatus>();
-    
-    private class SmsStatus
-    {
-        public SmsMessage smsMessage;
-        public long nextAttemptTime;
-        public int numAttempts = 0;
-        
-    }
-
-    private class ForwarderTask extends HttpTask {
-
-        private SmsMessage originalSms;
-
-        public ForwarderTask(SmsMessage originalSms) {
-            super(app);
-            this.originalSms = originalSms;
-        }
-
-        @Override
-        protected String getDefaultToAddress()
-        {
-            return originalSms.getOriginatingAddress();
-        }        
-                
-        @Override
-        protected void handleResponse(HttpResponse response) throws Exception {
-            for (OutgoingSmsMessage reply : parseResponseXML(response)) {
-                app.sendSMS(reply);
-            }                                        
-        }
-    }        
-    
-    public void sendMessageToServer(SmsMessage sms) 
-    {
-        String serverUrl = app.getServerUrl();
-        String message = sms.getMessageBody();
-        String sender = sms.getOriginatingAddress();
-
-        app.log("Received SMS from " + sender);
-
-        if (serverUrl.length() == 0) {
-            app.log("Can't forward SMS to server; Server URL not set");                        
-        } else {
-            app.log("Forwarding incoming SMS to server");
-
-            new ForwarderTask(sms).execute(
-                new BasicNameValuePair("from", sender),
-                new BasicNameValuePair("message", message),
-                new BasicNameValuePair("action", App.ACTION_INCOMING)
-            );
-        }
-    }
-
-    public void smsReceived(Intent intent) {
-
-        for (SmsMessage sms : getMessagesFromIntent(intent)) {
-            sendMessageToServer(sms);
-
-            //DeleteSMSFromInbox(context, mesg);
-        }
-
-    }
-
     @Override
     // source: http://www.devx.com/wireless/Article/39495/1954
     public void onReceive(Context context, Intent intent) {
@@ -88,7 +22,12 @@ public class IncomingMessageForwarder extends BroadcastReceiver {
             String action = intent.getAction();
 
             if (action.equals("android.provider.Telephony.SMS_RECEIVED")) {
-                smsReceived(intent);
+                
+                for (SmsMessage sms : getMessagesFromIntent(intent)) {
+                    app.sendMessageToServer(sms);
+
+                    //DeleteSMSFromInbox(context, mesg);
+                }
             }
         } catch (Throwable ex) {
             app.logError("Unexpected error in IncomingMessageForwarder", ex, true);

src/org/envaya/kalsms/Main.java

@@ -93,19 +93,11 @@ public class Main extends Activity {
         }        
     }
             
-    
-    public void onResume() {
-        App.debug("RESUME");
-        super.onResume();                                		
-    }	
-	
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         
-        App.debug("STARTED");
-        
         this.app = App.getInstance(this.getApplication());
                 
         setContentView(R.layout.main);
@@ -138,6 +130,9 @@ public class Main extends Activity {
         case R.id.check_now:
             app.checkOutgoingMessages();
             return true;
+        case R.id.retry_now:
+            app.retryStuckMessages(true);
+            return true;           
         case R.id.help:
             startActivity(new Intent(this, Help.class));
             return true;
@@ -161,6 +156,14 @@ public class Main extends Activity {
         return(true);
     }
 
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        MenuItem item = menu.findItem(R.id.retry_now);
+        int stuckMessages = app.getStuckMessageCount();
+        item.setEnabled(stuckMessages > 0);
+        item.setTitle("Retry Now (" + stuckMessages + ")");
+        return true;
+    }
 	    
     @Override
     protected void onStop(){

src/org/envaya/kalsms/MessageStatusNotifier.java

@@ -4,76 +4,21 @@
  */
 package org.envaya.kalsms;
 
-import android.app.Activity;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.telephony.SmsManager;
-import org.apache.http.message.BasicNameValuePair;
 
 public class MessageStatusNotifier extends BroadcastReceiver {
 
-    private App app;
-        
-    public void notifyStatus(String serverId, String status, String errorMessage)
-    {
-        String logMessage;
-        if (status.equals(App.STATUS_SENT))
-        {
-            logMessage = "sent successfully"; 
-        }
-        else if (status.equals(App.STATUS_FAILED))
-        {
-            logMessage = "could not be sent (" + errorMessage + ")";
-        }
-        else
-        {
-            logMessage = "queued";
-        }
-        String smsDesc = serverId == null ? "SMS reply" : ("SMS id=" + serverId);
-        
-        if (serverId != null)
-        {        
-            app.log("Notifying server " + smsDesc + " " + logMessage);            
-
-            new HttpTask(app).execute(
-                new BasicNameValuePair("id", serverId),
-                new BasicNameValuePair("status", status),
-                new BasicNameValuePair("error", errorMessage),
-                new BasicNameValuePair("action", App.ACTION_SEND_STATUS)
-            );
-        }
-        else
-        {
-            app.log(smsDesc + " " + logMessage);
-        }
-    }
-
     @Override
     public void onReceive(Context context, Intent intent) {
-        app = App.getInstance(context);
+        App app = App.getInstance(context);
         
-        String serverId = intent.getExtras().getString("serverId");
+        String id = intent.getExtras().getString("id");        
 
-        switch (getResultCode()) {
+        int resultCode = getResultCode();
-            case Activity.RESULT_OK:                
+        
-                this.notifyStatus(serverId, App.STATUS_SENT, "");
+        app.notifyOutgoingMessageStatus(id, resultCode);        
-                break;
-            case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
-                this.notifyStatus(serverId, App.STATUS_FAILED, "generic failure");
-                break;
-            case SmsManager.RESULT_ERROR_RADIO_OFF:
-                this.notifyStatus(serverId, App.STATUS_FAILED, "radio off");
-                break;
-            case SmsManager.RESULT_ERROR_NO_SERVICE:
-                this.notifyStatus(serverId, App.STATUS_FAILED, "no service");
-                break;
-            case SmsManager.RESULT_ERROR_NULL_PDU:
-                this.notifyStatus(serverId, App.STATUS_FAILED, "null PDU");
-                break;
-            default:
-                this.notifyStatus(serverId, App.STATUS_FAILED, "unknown error");
-                break;
-        }
     }
 }

src/org/envaya/kalsms/OutgoingMessagePoller.java

@@ -12,5 +12,6 @@ public class OutgoingMessagePoller extends BroadcastReceiver {
     public void onReceive(Context context, Intent intent) {
         app = App.getInstance(context);
         app.checkOutgoingMessages();
+        app.retryStuckMessages(false);
     }
 }

src/org/envaya/kalsms/OutgoingSmsMessage.java

@@ -8,8 +8,23 @@ public class OutgoingSmsMessage  {
     private String from;
     private String to;     
     
+    private String localId;
+        
+    private static int nextLocalId = 1;
+        
     public OutgoingSmsMessage()
     {
+        this.localId = "_o" + getNextLocalId();
+    }
+    
+    static synchronized int getNextLocalId()
+    {
+        return nextLocalId++;
+    }
+    
+    public String getId()
+    {
+        return (serverId == null) ? localId : serverId;
     }
     
     public String getLogName()