Adding the check on the existence of the database before creating one

components/iot-plugins/androidsense-plugin/org.wso2.carbon.device.mgt.iot.androidsense.plugin/src/main/java/org/wso2/carbon/device/mgt/iot/androidsense/plugin/impl/util/AndroidSenseUtils.java

@@ -92,8 +92,13 @@ public class AndroidSenseUtils {
 			Context ctx = new InitialContext();
 			DataSource dataSource = (DataSource) ctx.lookup(datasource);
 			DeviceSchemaInitializer initializer = new DeviceSchemaInitializer(dataSource);
+			String checkSql = "select * from ANDROID_SENSE_DEVICE";
+			if (!initializer.isDatabaseStructureCreated(checkSql)) {
 				log.info("Initializing device management repository database schema");
 				initializer.createRegistryDatabase();
+			} else {
+				log.info("Device management repository database already exists. Not creating a new database.");
+			}
 
 		} catch (NamingException e) {
 			log.error("Error while looking up the data source: " + datasource, e);

components/iot-plugins/arduino-plugin/org.wso2.carbon.device.mgt.iot.arduino.plugin/src/main/java/org/wso2/carbon/device/mgt/iot/arduino/plugin/impl/util/ArduinoUtils.java

@@ -105,8 +105,13 @@ public class ArduinoUtils {
             Context ctx = new InitialContext();
             DataSource dataSource = (DataSource) ctx.lookup(datasource);
             DeviceSchemaInitializer initializer = new DeviceSchemaInitializer(dataSource);
+            String checkSql = "select * from ARDUINO_DEVICE";
+            if (!initializer.isDatabaseStructureCreated(checkSql)) {
                 log.info("Initializing device management repository database schema");
                 initializer.createRegistryDatabase();
+            } else {
+                log.info("Device management repository database already exists. Not creating a new database.");
+            }
 
         } catch (NamingException e) {
             log.error("Error while looking up the data source: " + datasource, e);

components/iot-plugins/raspberrypi-plugin/org.wso2.carbon.device.mgt.iot.raspberrypi.plugin/src/main/java/org/wso2/carbon/device/mgt/iot/raspberrypi/plugin/impl/util/RaspberrypiUtils.java

@@ -94,8 +94,13 @@ public class RaspberrypiUtils {
             Context ctx = new InitialContext();
             DataSource dataSource = (DataSource) ctx.lookup(datasource);
             DeviceSchemaInitializer initializer = new DeviceSchemaInitializer(dataSource);
+            String checkSql = "select * from RASPBERRYPI_DEVICE";
+            if (!initializer.isDatabaseStructureCreated(checkSql)) {
                 log.info("Initializing device management repository database schema");
                 initializer.createRegistryDatabase();
+            } else {
+                log.info("Device management repository database already exists. Not creating a new database.");
+            }
         } catch (NamingException e) {
             log.error("Error while looking up the data source: " + datasource, e);
         } catch (Exception e) {

components/iot-plugins/virtual-fire-alarm-plugin/org.wso2.carbon.device.mgt.iot.virtualfirealarm.plugin/src/main/java/org/wso2/carbon/device/mgt/iot/virtualfirealarm/plugin/impl/util/VirtualFireAlarmUtils.java

@@ -99,8 +99,13 @@ public class VirtualFireAlarmUtils {
             Context ctx = new InitialContext();
             DataSource dataSource = (DataSource) ctx.lookup(datasourceName);
             DeviceSchemaInitializer initializer = new DeviceSchemaInitializer(dataSource);
+            String checkSql = "select * from VIRTUAL_FIREALARM_DEVICE";
+            if (!initializer.isDatabaseStructureCreated(checkSql)) {
                 log.info("Initializing device management repository database schema");
                 initializer.createRegistryDatabase();
+            } else {
+                log.info("Device management repository database already exists. Not creating a new database.");
+            }
         } catch (NamingException e) {
             log.error("Error while looking up the data source: " + datasourceName, e);
         } catch (Exception e) {

components/mobile-plugins/mobile-base-plugin/org.wso2.carbon.device.mgt.mobile/src/main/java/org/wso2/carbon/device/mgt/mobile/dao/util/MobileDeviceManagementDAOUtil.java

@@ -93,9 +93,22 @@ public class MobileDeviceManagementDAOUtil {
     public static void setupMobileDeviceManagementSchema(DataSource dataSource, String pluginType) throws MobileDeviceMgtPluginException {
         MobileDeviceManagementSchemaInitializer initializer =
                 new MobileDeviceManagementSchemaInitializer(dataSource, pluginType);
-        log.info("Initializing mobile device management repository database schema for : " + pluginType);
+        String checkSql = "select * from ";
+        if (pluginType.equalsIgnoreCase("android")) {
+            checkSql += "AD_DEVICE";
+        } else if (pluginType.equalsIgnoreCase("windows")) {
+            checkSql += "WIN_DEVICE";
+        } else {
+            checkSql += "IOS_DEVICE";
+        }
         try {
+            if (!initializer.isDatabaseStructureCreated(checkSql)) {
+                log.info("Initializing mobile device management repository database schema for : " + pluginType);
                 initializer.createRegistryDatabase();
+            } else {
+                log.info("Mobile device management repository database for " + pluginType
+                        + " already exists. Not creating a new database.");
+            }
         } catch (Exception e) {
             throw new MobileDeviceMgtPluginException("Error occurred while initializing Mobile Device " +
                                                 "Management database schema", e);