ADF mobile Data sync and sql lite usage

Question

Hi,
We are working on ADF mobile POC.(Jdev version 11.1.2.3.0)
Following Oracle mobile developer guide we generated "Webservice data control" which creates process(object) method to work with Webservice. We created the data-controls and used them in our Java code and are able to get the Webservice response also.
However we want to implement the offline mode feature and for this we are not able to get any document reference for implementation.
With offline mode support is it the application's responsibility to store the data locally using SQL Lite and do the data sync (using Web Service) OR will the framework would do the data sync automatically. Can someone please provide the implementation hint on how to do the Offline mode support in the mobile application using ADF.
Thanks
Pavan

Answer 1

Hi,
With offline mode support is it the application's responsibility to store the data locally using SQL Lite and do the data sync (using Web Service) OR will the framework would do the data sync automatically.
This is all you. In this version of ADF Mobile there is no automatic data synchronization between local data and the server side. The sample that come with the ADF Mobile extension have a SQLLIte example as well, which is in the HR application. Look for the "DBConnectionFactory" file
package application;
import java.sql.Connection;
import java.sql.SQLException;
import oracle.adfmf.framework.api.AdfmfJavaUtilities;
public class DBConnectionFactory {
    public DBConnectionFactory() {
        super();
    protected static Connection conn = null;
    public static Connection getConnection() throws Exception {
        if (conn == null) {
            try {
                // create a database connection
                String Dir = AdfmfJavaUtilities.getDirectoryPathRoot(AdfmfJavaUtilities.ApplicationDirectory);
                String connStr = "jdbc:sqlite:" + Dir + "/HR.db";
                conn = new SQLite.JDBCDataSource(connStr).getConnection();
            } catch (SQLException e) {
                // if the error message is "out of memory",
                // it probably means no database file is found
                System.err.println(e.getMessage());
        return conn;
}The LifeCycleListenerImpl class in the same demo shows how to use this SQL Lite connection
package application;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import javax.el.ValueExpression;
import oracle.adfmf.application.LifeCycleListener;
import oracle.adfmf.framework.api.AdfmfJavaUtilities;
public class LifeCycleListenerImpl implements LifeCycleListener {
    public LifeCycleListenerImpl() {
     * The start method will be called at the start of the application. Only the
     * Application Lifecycle Event listener will be called on start up.
    public void start() {
        System.out.println("!!!!!!!!!!!!!! App Start !!!!!!!!!!!!!!");
        //InitDB();
        try {
            Statement stat = DBConnectionFactory.getConnection().createStatement();
            ResultSet rs = stat.executeQuery("SELECT * FROM EMPLOYEES;");
        } catch (SQLException e) {
            // if the error message is "out of memory",
            // it probably means no database file is found
            System.err.println(e.getMessage());
            System.out.println("Database does not exist, creating it");
            InitDB();
        } catch (Exception e) {
            System.err.println(e.getMessage());
        System.out.println("!!!!!!!!!!!!!! Done App Start !!!!!!!!!!!!!!");
     * The stop method will be called at the termination of the application. Only
     * the Application Lifecycle Event listener will be called on start up.
     * NOTE: Depending on how the application is being shutdown, this method may
     * or may not be called. Features should save off their state in the deactivate
     * handler.
    public void stop() {
        // Add code here...
     * The activate method will be called when the feature is activated. The
     * Application Lifecycle Event listener will be called on application
     * being started and resumed.
    public void activate() {
        // Add code here...
     * The deactivate method will be called when the feature is deactivated. The
     * Application Lifecycle Event listener will be called on application
     * being hibernated.
    public void deactivate() {
        // Add code here...
    private void InitDB() {
        try {
            System.out.println("!!!!!!!!!!!!!!InitDB Start!!!!!!!!!!!!!!");
            ClassLoader cl = Thread.currentThread().getContextClassLoader();
            InputStream is = cl.getResourceAsStream(".adf/META-INF/hr.sql");
            if (is == null) {
                System.err.println("###### Could not look up : /META-INF/hr.sql");
                return;
            BufferedReader bReader = new BufferedReader(new InputStreamReader(is));
            List stmts = new ArrayList();
            String strstmt = "";
            String ln = bReader.readLine();
            while (ln != null) {
                if (ln.startsWith("REM") || ln.startsWith("COMMIT")) {
                    ln = bReader.readLine();
                    continue;
                strstmt = strstmt + ln;
                if (strstmt.endsWith(";")) {
                    System.out.println(strstmt);
                    stmts.add(strstmt);
                    strstmt = "";
                    ln = bReader.readLine();
                    continue;
                ln = bReader.readLine();
            DBConnectionFactory.getConnection().setAutoCommit(false);
            for (int i = 0; i < stmts.size(); i++) {
                Statement pStmt = DBConnectionFactory.getConnection().createStatement();
                pStmt.executeUpdate((String)stmts.get(i));
            DBConnectionFactory.getConnection().commit();
            System.out.println("!!!!!!!!!!!!!!InitDB Done!!!!!!!!!!!!!!");
        } catch (Exception e) {
            e.printStackTrace();
}Hope this is what you were looking for
Frank