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CreateManager


Difference between version 80 and version 66:

At line 6 changed 1 line.
This tutorial will show you how to create a Business Delegate class (and a JUnit Test) to talk to the [DAO we created in Part I|CreateDAO].
This tutorial will show you how to create a Business Facade class (and a JUnit Test) to talk to the [DAO we created in Part I|CreateDAO].
At line 8 changed 2 lines.
In the context of [AppFuse], this is called a Manager class. It's main responsibility to act as a bridge between the persistence (DAO) layer and the
web layer. The [Business Delegate|http://java.sun.com/blueprints/corej2eepatterns/Patterns/BusinessDelegate.html] pattern from Sun says that these objects are useful for de-coupling your presentation layer from your database layer (i.e. for Swing apps). Managers should also be where you put any business logic for your application.
In the context of [AppFuse], this is called a Manager class. Its main responsibility is to act as a bridge between the persistence (DAO) layer and the web layer. It's also useful for de-coupling your presentation layer from your database layer (i.e. for Swing apps). Managers should also be where you put any business logic for your application.
At line 26 changed 1 line.
This class should extend [BaseManagerTestCase|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/service/BaseManagerTestCase.java.html], which already exists in the ''service'' package. The parent class (BaseManagerTestCase) serves the same functionality as the BaseDaoTestCase - to load a properties file that has the same name as your *Test.class, as well as to initialize Spring's ApplicationContext.
This class should extend [BaseManagerTestCase|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/service/BaseManagerTestCase.java.html], which already exists in the ''service'' package. The parent class (BaseManagerTestCase) serves similar functionality as the BaseDaoTestCase.
At line 30 changed 1 line.
The code below is what we need for a basic JUnit test of our Managers. The code below simply creates and destroys the PersonManager. The "ctx" object is initialized in the [BaseManagerTestCase|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/service/BaseManagerTestCase.java.html] class.
The code below is what you need for a basic JUnit test of your Manager. Unlike the DaoTest, this test uses [jMock|http://jmock.org] to isolate the Manager from its dependencies and make it a ''true'' "unit" test. This can be very helpful because it allows you to test your business logic w/o worrying about other dependencies. The code below simply sets up the Manger and its dependencies (as Mocks) for testing.
At line 36 changed 2 lines.
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.List;
import java.util.ArrayList;
At line 38 added 1 line.
import org.appfuse.dao.PersonDao;
At line 40 added 1 line.
import org.appfuse.service.impl.PersonManagerImpl;
At line 42 added 2 lines.
import org.jmock.Mock;
import org.springframework.orm.ObjectRetrievalFailureException;
At line 46 added 4 lines.
private final String personId = "1";
private PersonManager personManager = new PersonManagerImpl();
private Mock personDao = null;
private Person person = null;
At line 44 changed 6 lines.
private Person person;
private PersonManager mgr = null;
private Log log = LogFactory.getLog(PersonManagerTest.class);
protected void setUp() {
mgr = (PersonManager) ctx.getBean("personManager");
protected void setUp() throws Exception {
super.setUp();
personDao = new Mock(PersonDao.class);
personManager.setPersonDao((PersonDao) personDao.proxy());
At line 52 changed 2 lines.
protected void tearDown() {
mgr = null;
protected void tearDown() throws Exception {
super.tearDown();
personManager = null;
At line 55 removed 4 lines.
public static void main(String[] args) {
junit.textui.TestRunner.run(PersonManagerTest.class);
}
At line 62 changed 1 line.
Now that we have the JUnit framework down for this class, let's add the meat: the test methods to make sure everything works in our Manager. Here's a snippet from the [DAO Tutorial|CreateDAO] tutorial to help you understand what we're about to do.
Now that you have the skeleton done for this class, you need to add the meat: the test methods to make sure everything works. Here's a snippet from the [DAO Tutorial|CreateDAO] tutorial to help you understand what we're about to do.
At line 71 changed 4 lines.
person = (Person) mgr.getPerson("1");
assertTrue("person.firstName not null",
person.getFirstName() != null);
// set expected behavior on dao
personDao.expects(once()).method("getPerson")
.will(returnValue(new Person()));
person = personManager.getPerson(personId);
assertTrue(person != null);
personDao.verify();
At line 78 changed 3 lines.
person = (Person) mgr.getPerson("1");
String name = person.getFirstName();
person.setFirstName("test");
// set expected behavior on dao
personDao.expects(once()).method("savePerson")
.with(same(person)).isVoid();
At line 82 changed 2 lines.
person = (Person) mgr.savePerson(person);
assertTrue("name updated", person.getFirstName().equals("test"));
personManager.savePerson(person);
personDao.verify();
}
At line 85 removed 4 lines.
person.setFirstName(name);
mgr.savePerson(person);
}
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person = (Person) populate(person);
At line 93 changed 3 lines.
person = (Person) mgr.savePerson(person);
assertTrue(person.getFirstName().equals("Bill"));
assertTrue(person.getId() != null);
// set required fields
person.setFirstName("firstName");
person.setLastName("lastName");
At line 97 changed 4 lines.
if (log.isDebugEnabled()) {
log.debug("removing person, personId: " +
person.getId());
}
// set expected behavior on dao
personDao.expects(once()).method("savePerson")
.with(same(person)).isVoid();
personManager.savePerson(person);
personDao.verify();
At line 102 changed 1 line.
mgr.removePerson(person.getId().toString());
// reset expectations
personDao.reset();
At line 104 changed 1 line.
assertNull(mgr.getPerson(person.getId().toString()));
personDao.expects(once()).method("removePerson").with(eq(new Long(personId)));
personManager.removePerson(personId);
personDao.verify();
// reset expectations
personDao.reset();
// remove
Exception ex = new ObjectRetrievalFailureException(Person.class, person.getId());
personDao.expects(once()).method("removePerson").isVoid();
personDao.expects(once()).method("getPerson").will(throwException(ex));
personManager.removePerson(personId);
try {
personManager.getPerson(personId);
fail("Person with identifier '" + personId + "' found in database");
} catch (ObjectRetrievalFailureException e) {
assertNotNull(e.getMessage());
}
personDao.verify();
At line 114 changed 1 line.
First off, create a PersonManager.java interface in the src/service/**/service directory and specify the basic CRUD methods for any implementation classes. ''I've eliminated the JavaDocs in the class below for display purposes.''
First off, create a PersonManager.java interface in the src/service/**/service directory and specify the basic CRUD methods for any implementation classes. ''I've eliminated the JavaDocs in the class below for display purposes.'' The ''setPersonDao()'' method is not used in most cases - its just exists so the PersonManagerTest can set the DAO on the interface.
At line 142 added 1 line.
import org.appfuse.dao.PersonDao;
At line 124 removed 2 lines.
import java.util.List;
At line 127 changed 3 lines.
public List getPeople(Person person);
public void setPersonDao(PersonDao dao);
At line 131 changed 3 lines.
public Person savePerson(Object person);
public void savePerson(Person person);
At line 138 changed 1 line.
Now let's create a PersonManagerImpl class that implements the methods in PersonManager. To do this, create a new class in src/service/**/service and name it PersonManagerImpl.java. It should extend BaseManager and implement PersonManager.
Now let's create a PersonManagerImpl class that implements the methods in PersonManager. To do this, create a new class in src/service/**/service/impl and name it PersonManagerImpl.java. It should extend BaseManager and implement PersonManager.
At line 142 changed 1 line.
package org.appfuse.service;
package org.appfuse.service.impl;
At line 144 removed 3 lines.
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
At line 160 added 1 line.
import org.appfuse.service.PersonManager;
At line 150 removed 6 lines.
import java.util.List;
/**
* @author mraible
* @version $Revision: $ $Date: May 25, 2004 11:46:54 PM $
*/
At line 157 removed 1 line.
private static Log log = LogFactory.getLog(PersonManagerImpl.class);
At line 164 removed 4 lines.
public List getPeople(Person person) {
return dao.getPeople(person);
}
At line 172 changed 1 line.
public Person savePerson(Object person) {
public void savePerson(Person person) {
At line 174 removed 1 line.
return (Person) person;
At line 183 changed 2 lines.
One thing to note is the {{setPersonDao}} method. This is used by Spring to bind the PersonDao to this Manager. This is configured in the applicationContext-service.xml file. We'll get to configuring that in Step 3[3].
You should be able to compile everything now using "ant compile-service"...
One thing to note is the {{setPersonDao()}} method. This is used by Spring to bind the PersonDao to this Manager. This is configured in the applicationContext-service.xml file. We'll get to configuring that in Step 3[3]. You should be able to compile everything now using "ant compile-service".
At line 186 changed 1 line.
Finally, we need to create the PersonManagerTest.properties file in test/service/**/service so that {{person = (Person) populate(person);}} will work in our test.
Now you need to edit Spring's config file for our services layer so it will know about this new Manager.
At line 188 removed 7 lines.
;:''If you created a PersonDaoTest.properties file in the last tutorial, duplicating (and renaming) it is the easy route. Alternatively, you could set the properties manually.''
{{{firstName=Bill
lastName=Joy}}}
Now we need to edit Spring's config file for our services layer so it will know about this new Manager.
At line 197 changed 1 line.
To notify Spring of this our PersonManager interface and it's implementation, open the src/service/**/service/applicationContext-service.xml file. In here, you will see an existing configuration for the UserManager. You should be able to copy that and change a few things to get the XML fragment below. Add the following to the bottom of this file.
To notify Spring of this our PersonManager interface and its implementation, open the src/service/**/service/applicationContext-service.xml file. Add the following to the bottom of this file.
At line 201 changed 3 lines.
<!-- Person Manager -->
<bean id="personManagerTarget" class="org.appfuse.service.PersonManagerImpl" singleton="false">
<property name="personDao"><ref bean="personDAO"/></property>
<bean id="personManager" class="org.appfuse.service.impl.PersonManagerImpl">
<property name="personDao" ref="personDao"/>
At line 205 removed 8 lines.
<!-- Transaction declarations for business services. To apply a generic transaction proxy to
all managers, you might look into using the BeanNameAutoProxyCreator -->
<bean id="personManager" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager"><ref bean="transactionManager"/></property>
<property name="target"><ref local="personManagerTarget"/></property>
<property name="transactionAttributeSource"><ref local="defaultTxAttributes"/></property>
</bean>
At line 215 changed 1 line.
''Note: [I|DaveKeller] had SAX throw an error because defaultTxAttributes was not defined so I replaced the transactionAttributeSource with this instead, which allowed my unit test to run successfully.''
This bean must have a name that ends in "Manager". This is because there is AOP advice applied at the top of this file for all *Manager beans.
{{{<aop:advisor id="managerTx" advice-ref="txAdvice" pointcut="execution(* *..service.*Manager.*(..))" order="2"/>}}} For more information on transactions with Spring, see [Spring's documentation|http://www.springframework.org/docs/reference/transaction.html].
At line 217 removed 11 lines.
[{Java2HtmlPlugin
<property name="transactionAttributes">
<props>
<prop key="*">PROPAGATION_REQUIRED</prop>
</props>
</property>
}]
At line 230 changed 1 line.
Save all your edited files and try running "ant test-service -Dtestcase=PersonManager" one more time.
Save all your edited files and try running __ant test-service -Dtestcase=PersonManager__.
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__Yeah Baby, Yeah:__
''Yeah Baby, Yeah:''
At line 211 added 2 lines.
The files that were modified and added to this point are [available for download|https://appfuse.dev.java.net/files/documents/1397/7484/appfuse-tutorial-managers-1.6.zip].

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