Android Open Source - sana M D S Sync Task

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License

The source code is released under:

Copyright (c) 2010, Moca All rights reserved. The source code for Moca is licensed under the BSD license as follows: Redistribution and use in source and binary forms, with or without modification, ...

Java Source Code

package org.moca.task;
//from   w  w w . j av a  2  s. com
import java.util.ArrayList;
import java.util.List;

import org.moca.db.Event;
import org.moca.db.MocaDB.EventSQLFormat;
import org.moca.net.MDSInterface;
import org.moca.util.MocaUtil;

import android.app.ProgressDialog;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.os.AsyncTask;
import android.util.Log;

public class MDSSyncTask extends AsyncTask<Context, Void, Integer> {
  public static final String TAG = MDSSyncTask.class.toString();
  public static final Integer EMR_SYNC_NO_CONNECTION = 0;
  public static final Integer EMR_SYNC_SUCCESS = 1;
  public static final Integer EMR_SYNC_FAILURE = 2;
  
  private ProgressDialog progressDialog;
  private Context mContext = null; // TODO context leak?
  
  public MDSSyncTask(Context c) {
    mContext = c;
  }
  
  private boolean syncPatients(Context c) {
    return MDSInterface.updatePatientDatabase(c, c.getContentResolver());
  }
  
  private boolean syncEvents(Context c) {
    Cursor cursor = null; 
    Log.i(TAG, "Syncing the event log to the MDS.");
    
    try {
      // Get all un-uploaded events.
      cursor = c.getContentResolver().query(EventSQLFormat.CONTENT_URI, 
          new String[] { EventSQLFormat._ID, EventSQLFormat.CREATED_DATE, 
                  EventSQLFormat.EVENT_TYPE, EventSQLFormat.EVENT_VALUE, 
                  EventSQLFormat.ENCOUNTER_REFERENCE, EventSQLFormat.PATIENT_REFERENCE, 
                  EventSQLFormat.USER_REFERENCE }, 
                EventSQLFormat.UPLOADED+"=?", new String[] { "0" }, null);
      int numEvents = cursor.getCount();
      
      if (numEvents == 0) {
        // Nothing to upload, quit.
        Log.i(TAG, "No unuploaded events. Skipping syncEvents.");
        return true;
      } else {
        Log.i(TAG, "There are " + numEvents + " unuploaded events.");
      }
      
      StringBuilder sb = new StringBuilder("(");
      List<Event> events = new ArrayList<Event>(numEvents);

      cursor.moveToFirst();
      while (!cursor.isAfterLast()) {
        
        Event e = new Event();
        e.event_time = cursor.getLong(cursor.getColumnIndex(EventSQLFormat.CREATED_DATE));
        e.event_type = cursor.getString(cursor.getColumnIndex(EventSQLFormat.EVENT_TYPE));
        e.event_value = cursor.getString(cursor.getColumnIndex(EventSQLFormat.EVENT_VALUE));
        e.encounter_reference = cursor.getString(cursor.getColumnIndex(EventSQLFormat.ENCOUNTER_REFERENCE));
        e.patient_reference = cursor.getString(cursor.getColumnIndex(EventSQLFormat.PATIENT_REFERENCE));
        e.user_reference = cursor.getString(cursor.getColumnIndex(EventSQLFormat.USER_REFERENCE));
        int id = cursor.getInt(cursor.getColumnIndex(EventSQLFormat._ID));
        events.add(e);
        
        sb.append(id);
        if (!cursor.isLast()) {
          sb.append(",");
        }
                
        cursor.moveToNext();
      }
      sb.append(")");

      // Submit the events to the MDS
      boolean result = MDSInterface.submitEvents(c, events);
      
      // Set the uploaded events as uploaded in the database.
      if (result) {
        Log.i(TAG, "Successfully uploaded " + numEvents + " events.");
        ContentValues cv = new ContentValues();
        cv.put(EventSQLFormat.UPLOADED, 1);
        int rowsUpdated = c.getContentResolver().update(EventSQLFormat.CONTENT_URI, cv, EventSQLFormat._ID +" in " + sb.toString(), null);
        if (rowsUpdated != numEvents) {
          Log.w(TAG, "Didn't get as many rows updated as we thought we would.");
        }
      } 
      
      return result;
    } catch (Exception e) {
      Log.e(TAG, "While trying to submit the event log, got exception: " + e.toString());
      e.printStackTrace();
    } finally {
      if (cursor != null)
        cursor.deactivate();
    }
      
    return false;
  }
  
  @Override
  protected Integer doInBackground(Context... params) {
    Log.i(TAG, "Executing EMRSyncTask");
    Context c = params[0];
    
    Integer result = EMR_SYNC_NO_CONNECTION; // TODO detect this case better
    
    if (MocaUtil.checkConnection(c)) {
      boolean patientSyncResult = syncPatients(c);
      boolean eventSyncResult = syncEvents(c);
      
      result = (patientSyncResult && eventSyncResult) ? EMR_SYNC_SUCCESS : EMR_SYNC_FAILURE;  
    }
    
    return result;
  }
  
  @Override
  protected void onPreExecute() {
    Log.i(TAG, "About to execute EMRSyncTask");
    if (progressDialog != null) {
        progressDialog.dismiss();
        progressDialog = null;
      }
    progressDialog = new ProgressDialog(mContext);
      progressDialog.setMessage("Updating patient database cache");
      progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
      progressDialog.show();  
    }
  
  @Override
  protected void onPostExecute(Integer result) {
    Log.i(TAG, "Completed EMRSyncTask");
    if (progressDialog != null) {
        progressDialog.dismiss();
        progressDialog = null;
      }
  }
  
}

Java Source Code List

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