Refactor operations mgt connection handling

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/OperationManagerImpl.java

@@ -120,19 +120,11 @@ public class OperationManagerImpl implements OperationManager {
         try {
             List<Operation> operations = new ArrayList<Operation>();
 
-            OperationManagementDAOFactory.beginTransaction();
             operations.addAll(profileOperationDAO.getOperations(deviceId, Operation.Status.PENDING));
             operations.addAll(configOperationDAO.getOperations(deviceId, Operation.Status.PENDING));
             operations.addAll(commandOperationDAO.getOperations(deviceId, Operation.Status.PENDING));
-            OperationManagementDAOFactory.commitTransaction();
-
             return operations;
         } catch (OperationManagementDAOException e) {
-            try {
-                OperationManagementDAOFactory.rollbackTransaction();
-            } catch (OperationManagementDAOException e1) {
-                log.warn("Error occurred while roll-backing the transaction", e1);
-            }
             throw new OperationManagementException("Error occurred while retrieving the list of " +
                     "pending operations assigned for '" + deviceId.getType() + "' device '" +
                     deviceId.getId() + "'", e);

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ProfileOperationDAOImpl.java

@@ -54,7 +54,7 @@ public class ProfileOperationDAOImpl extends OperationDAOImpl {
             stmt = conn.prepareStatement("INSERT INTO DM_PROFILE_OPERATION(OPERATION_ID, OPERATION_DETAILS) " +
                     "VALUES(?, ?)");
             stmt.setInt(1, operationId);
-            stmt.setBytes(2, bao.toByteArray());
+            stmt.setObject(2, bao.toByteArray());
             stmt.executeUpdate();
         } catch (SQLException e) {
             throw new OperationManagementDAOException("Error occurred while adding profile operation", e);