dao

Understanding Service and DAO layers

由 南笙酒味 提交于 2019-12-12 12:16:23
问题 I was asked to create documentation of classes in the business logic module of a project. I noticed that there was a pattern on how the classes where created. The pattern looks like this public class AModel(){ //fields //getter and setters } public class AService(){ public void processA(AModel model){ //creates instance of AModel, assigns values to fields //calls ADaoService methods } } public class ADaoService(){ //has methods which call ADao methods //sample public AModel retrieveById(long

Run-time error 3219 when trying dbs.OpenRecordset

由 旧巷老猫 提交于 2019-12-12 07:03:15
问题 Normally I use ADODB recordsets and database connections, but i am required to use DAO record sets for the first time due to some limitations of ADO. I am attempting to create a recordset and i am receiving error 3219 - Invalid Operation. Here is all my DAO database code. Dim dbsTrace As DAO.Database Dim rsTrace As DAO.Recordset Set dbsTrace = CurrentDb Set rsTrace = dbsTrace.OpenRecordset("TRACE", dbOpenTable) The error is throwing on the last line. This code was taken directly from the msdn

How to test DAO with DataSource in Java Web Application?

由 五迷三道 提交于 2019-12-12 05:25:52
问题 I'm doing my project using Tomcat 7 , JSP , Servlets , Log4j and MySQL . I've googled this question for hours with no proper answer. How can I test my DAO's using DataSource and JUnit ? I found this article recently, but don't know how to configure it for my purposes and don't sure if it's a good way of doing it. I'm having the following DAO hierarchy: And I'm obtaining the DataSource in AbstractRepository in the following way: ... protected final DataSource ds; ... public AbstractRepository(

Spring Security 2.0.6 what calls the loadUserByName method of an UserDetailService

由 南楼画角 提交于 2019-12-12 05:13:07
问题 I'm building a simple Sring MVC app. And now i'm trying to add Spring security. I've added a customUserDetailsService that uses a DAO to access a MySql database and get users. @Transactional(readOnly = true) public class CustomUserDetailService implements UserDetailsService { @EJB(name = "UserDAOLocal") UserDAOLocal dao = null; public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException, DataAccessException { System.out.println("Checking if this is invoked")

JSF Controller, Service and DAO

由 大城市里の小女人 提交于 2019-12-12 03:37:04
问题 I'm trying to get used to how JSF works with regards to accessing data (coming from a spring background) I'm creating a simple example that maintains a list of users, I have something like <h:dataTable value="#{userListController.userList}" var="u"> <h:column>#{u.userId}</h:column> <h:column>#{u.userName}</h:column> </h:dataTable> Then the "controller" has something like @Named(value = "userListController") @SessionScoped public class UserListController { @EJB private UserListService

Passing DAO.Workspace as a parameter - Bad idea?

由 筅森魡賤 提交于 2019-12-12 03:17:12
问题 In David Fenton's answer to the question "MS Access (Jet) transactions, workspaces" he states: I would also say, never pass the workspace -- only pass the objects you've created with the workspace. Is passing the workspace a bad idea? If so, why? Additional info: My intent here is to execute INSERT/UPDATE/DELETE statements from within multiple Subs/Functions but wrap them all in a single transaction. The base functionality is wrapped up in a class module. I want to be able to isolate multiple

Recordset Edits and Updates the Wrong Record

由 我的梦境 提交于 2019-12-12 02:49:05
问题 I have the following code to loop through two tables and merge them into a new table: Public Function MyFunction() Dim Db As DAO.Database Dim rst(1 To 3) As DAO.Recordset Dim fld As DAO.Field Dim fldname, fldtype As String Dim PxID As Integer Dim Iter, Counter As Integer Set Db = CurrentDb Set rst(1) = Db.OpenRecordset("Table1") Call PrepTable ' Creates table named Test rst(1).MoveFirst Do While Not rst(1).EOF PxID = rst(1)!PersonID Set rst(2) = Db.OpenRecordset("SELECT * FROM Table2 WHERE

Can Spring DAO be merged into Service layer?

由 本小妞迷上赌 提交于 2019-12-12 01:09:28
问题 I'm developing a web application with spring framework and mybatis. In most cases(at least for me), DAO's methods are very short something like this: public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao { public User getUser(String userId) { return (User) getSqlSession().selectOne("org.mybatis.spring.sample.mapper.UserMapper.getUser", userId); } } So basically, I need to write a method(e.g. getUser(String userId) ) in DAO for each query which is being forwarded to service

Android Studio 测试

由 做~自己de王妃 提交于 2019-12-11 23:14:06
Android Studio 数据库测试c 测试时上下文为InstrumentationRegistry.getInstrumentation().getTargetContext() public class ExampleInstrumentedTest { private static final String TAG = "MyTest" ; @Test public void testsadd ( ) throws Exception { StudentDao dao = new StudentDao ( InstrumentationRegistry . getInstrumentation ( ) . getTargetContext ( ) ) ; dao . add ( "张三" , "male" ) ; } @Test public void testDelet ( ) throws Exception { StudentDao dao = new StudentDao ( InstrumentationRegistry . getInstrumentation ( ) . getTargetContext ( ) ) ; dao . delete ( "张三" ) ; } @Test public void testUpdate ( ) throws

Spring: autowiring DAO into a utility class not working

由 一个人想着一个人 提交于 2019-12-11 19:49:52
问题 I have an annotation driven spring mvc project templated after the JBoss web mvc sample. (Spring, Hibernate, JPA 2.0) I have a utility package where I want to put reusable classes for obviously utility functions. Specifically I have a LogonUtilities class where I want to query a database to get information. I autowire my DAO there but when I debug the DAO is always null and fails with that exception. I have read and tried many things - I know I've probably come across the solution already -
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