Akhil Maharaj

I just started learning Struts2 from book "Struts2InAction " . The source code given below , that is downloaded works fine in Tomcat6.0

If I change the name space from "/chapterTwo" to "/ChapterTwoFUN" , it is giving the error message
There is no Action mapped for namespace /chapterTwo and action name HelloWorld.

Please throw some light

<package name="chapterTwo" namespace="/chapterTwo" extends="struts-default"> <action name="Name"> <result>/chapterTwo/NameCollector.jsp</result> </action> <action name="HelloWorld" class="manning.chapterTwo.HelloWorld"> <result name="SUCCESS">/chapterTwo/HelloWorld.jsp</result> </action> </package>

All ,

Book is associated with Publisher by many-one asociation

I am attaching Book.java ,Book.hbm.xml , Publisher.java , Publisher.hbm.xml.

Everything works OK. When I want to delete couple of rows in PUBLISHER , I am getting exception as they are referred in BOOK table.

Can anybody share ideas if I want to delete all the BOOK objects when the associated PUBLISHER is deleted ? ( Some thing like cascade=delete).
it might be obvious for some of you....

********** Publisher.java
public class Publisher { private Long id; private String code; private String name; private String address; // Getters and Setters public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; }

********** Publisher.java ends here

********** Publisher.hbm.xml starts here

<hibernate-mapping package="com.gary.tutorial" > <class name="Publisher" table="PUBLISHER" lazy="false" > <id name="id" type="long" column="ID" > <generator class="native" /> </id> <property name="code" type="string"> <column name="CODE" length="4" not-null="true" unique="true" /> </property> <property name="name" type="string"> <column name="PUBLISHER_NAME" length="100" not-null="true" /> </property> <property name="address" type="string"> <column name="ADDRESS" length="200" /> </property> </class> </hibernate-mapping>
********** Publisher.hbm.xml ends here



************ Book.java starts here
public class Book { private Long id; private String isbn; private String name; private Publisher publisher; private Date publishDate; private Integer price; private Set<Chapter> chapters; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getIsbn() { return isbn; } public void setIsbn(String isbn) { this.isbn = isbn; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Publisher getPublisher() { return publisher; } public void setPublisher(Publisher publisher) { this.publisher = publisher; } public Date getPublishDate() { return publishDate; } public void setPublishDate(Date publishDate) { this.publishDate = publishDate; } public Integer getPrice() { return price; } public void setPrice(Integer price) { this.price = price; } public Set<Chapter> getChapters() { return chapters; } public void setChapters(Set<Chapter> chapters) { this.chapters = chapters; }
************ Book.java ends here


************ Book.hbm.xml starts here
<hibernate-mapping package="com.gary.tutorial"> <class name="Book" table="BOOK"> <id name="id" type="long" column="ID"> <generator class="native"/> </id> <property name="isbn" type="string"> <column name="ISBN" length="50" not-null="true" unique="true" /> </property> <property name="name" type="string"> <column name="BOOK_NAME" length="100" not-null="true" /> </property> <property name="publishDate" type="date" column="PUBLISH_DATE" /> <property name="price" type="int" column="PRICE" /> <many-to-one name="publisher" class="Publisher" column="PUBLISHER_ID" /> <set name="chapters" table="BOOK_CHAPTER" cascade="save-update,delete,delete-orphan"> <key column="BOOK_ID" /> <many-to-many column="CHAPTER_ID" class="Chapter" unique="true" /> </set> </class> </hibernate-mapping>
************ Book.hbm.xml ends here

All ,


Reference : EJB3.0 in action (Manning)

I am trying to understand the follwoing line

Annotations used with a setter method are ignored by the persistence provider for property-based access.

Any ideas ?

I under stand that the foolowing code also from the same book is Property based persistence

@Entity public class Category { @Id public Long id; public String name; public Date modificationDate; public Category() {} }

Thanks for providing the link for Specs. It looks like I have to start digging into specs.

Hi all,

Where do I get the document describing EJB3.0 sepc . All I get from sun is the document , which is nothing but API

THanks
Akhil

I came across the following statement when I am going through Mastering EJB3.0 book .Can any body explain how we can configure JBoss to create the tables for each entity bean ?

you can configure JBoss to create the tables for each entity bean when the application server boots and deploys its EJBs.

Hi ,

I am relatively new to this . But I think I have spent more than 10 hours googling . My goal is to run my first EJB3.0 . I have taken the code from
Ch4 of Oriely Mastering EJB3.0 5th edition. I am using Ant and JBoss 4.2.2

First Thing is ant task compile is ok .
Even deploy task is also happening OK . I can see the titan.jar in the deploy direcotry . However , It is not listed in the jmx_console.

Second thing is after titan.jar is deployed to Jboss , I am running the client , Thats where I am getting this exception .

Buildfile: build.xml prepare: compile: ejbjar: run.client: [java] javax.naming.NameNotFoundException: TravelAgentBean not bound [java] at org.jnp.server.NamingServer.getBinding(NamingServer.java:529) [java] at org.jnp.server.NamingServer.getBinding(NamingServer.java:537) [java] at org.jnp.server.NamingServer.getObject(NamingServer.java:543) [java] at org.jnp.server.NamingServer.lookup(NamingServer.java:267) [java] at sun.reflect.GeneratedMethodAccessor59.invoke(Unknown Source) [java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [java] at java.lang.reflect.Method.invoke(Unknown Source) [java] at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source) [java] at sun.rmi.transport.Transport$1.run(Unknown Source) [java] at java.security.AccessController.doPrivileged(Native Method) [java] at sun.rmi.transport.Transport.serviceCall(Unknown Source) [java] at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source) [java] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source) [java] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source) [java] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) [java] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [java] at java.lang.Thread.run(Unknown Source) [java] at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255) [java] at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233) [java] at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142) [java] at org.jnp.server.NamingServer_Stub.lookup(Unknown Source) [java] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:667) [java] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627) [java] at javax.naming.InitialContext.lookup(InitialContext.java:392) [java] at com.titan.clients.Client.main(Client.java:19) BUILD SUCCESSFUL Total time: 0 seconds

Here is the client code

package com.titan.clients; import com.titan.travelagent.TravelAgentRemote; import com.titan.domain.Cabin; import javax.naming.InitialContext; import javax.naming.Context; import javax.naming.NamingException; import java.util.Properties; import javax.rmi.PortableRemoteObject; public class Client { public static void main(String [] args) { try { Context jndiContext = getInitialContext( ); Object ref = jndiContext.lookup("TravelAgentBean/remote"); TravelAgentRemote dao = (TravelAgentRemote) PortableRemoteObject.narrow(ref,TravelAgentRemote.class); Cabin cabin_1 = new Cabin( ); cabin_1.setId(1); cabin_1.setName("Master Suite"); cabin_1.setDeckLevel(1); cabin_1.setShipId(1); cabin_1.setBedCount(3); dao.createCabin(cabin_1); Cabin cabin_2 = dao.findCabin(1); System.out.println(cabin_2.getName( )); System.out.println(cabin_2.getDeckLevel( )); System.out.println(cabin_2.getShipId( )); System.out.println(cabin_2.getBedCount( )); } catch (javax.naming.NamingException ne){ne.printStackTrace( );} } public static Context getInitialContext( ) throws javax.naming.NamingException { Properties p = new Properties( ); //jndiContext.addToEnvironment("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory"); //jndiContext.addToEnvironment("java.naming.factory.url.pkgs", "org.jboss.naming,org.jnp.interfaces"); //jndiContext.addToEnvironment("java.naming.provider.url","localhost:8080"); // ... Specify the JNDI properties specific to the vendor. p.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory"); p.put(Context.URL_PKG_PREFIXES, " org.jboss.naming :-o rg.jnp.interfaces"); p.put(Context.PROVIDER_URL, "jnp://localhost:1099"); return new javax.naming.InitialContext(p); } }

Another thing that is puzzling me is what is the meaning of messages that I see ( the following) on the console ,

-- MBeans waiting for other MBeans --- ObjectName: jboss.j2ee:jar=titan.jar,name=TravelAgentBean,service=EJB3 State: NOTYETINSTALLED I Depend On: persistence.units:unitName=titan --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- ObjectName: persistence.units:unitName=titan State: NOTYETINSTALLED Depends On Me: jboss.j2ee:jar=titan.jar,name=TravelAgentBean,service=EJB3

Chris
Thanks for finding the typos .It was my mistake .
I was going through Manning's SCWCDExam guide by Hanumanth Deshmukh . One of the topics about XML documents and request time attributes discussed this . I think when they say it is OK , it means it is syntactically correct and JSP will get translated to servelt code .

I am still trying to find the answer ...

Hi ,
Any ideas on why the line 1 is not OK. But line 3 is OK .
They look similar to me .
<% String myURL="fun.jsp"; %> <jsp:include page="<%= myURL %>" // This is not OK // Line 1 <jsp:include page="%= myURL %" // This is OK // Line 2 <jsp:useBean id="addr" class="AddressBean"> <% String myCity="NewYork; %> <jsp:setProperty name="addr" property="city" value="<%= myCity %>" // This is OK Line 3 </jsp:useBean>

Thanks

Hi

Here is my interpretatin of Servlet2.4 spec (Page 65 and 66 )

Let us say Request goes to MyServlet and it includes ServletA .
Now inside ServletA's code , javax.servlet.include.request_uri attribute will give the requestURI of ServletA.

On the other hand
Let us say Request goes to MyServlet and it gets forwarded to ServletA .
Now inside ServletA's code , javax.servlet.forward.request_uri attribute will give the requestURI of MyServlet. Even if original request gets forwarded from ServletA to ServletB to ServletC , the attribute javax.servlet.forward.request_uri will always correspond to original request from client.

Can some body clarify why it is different ?

Thanks

Thanks for clarification

Hi All

This question is regarding the last question in Page 660 of HFSJ.

How do you constrain evertyhing with in foo/bar directory so that only ADMIN can invoke ANY http methods on those resources .

The answer given is :

<web-app> .... <security-constraint> <web-resource-collection> <url-pattern>/foo/bar/*</url-pattern> <web-resource-collection> <auth-constraint> <role-name>ADMIN</role-name> <auth-constraint> <security-constraint> .... </web-app>

My understanding is that

security-constraint defines the �http-methods� that can be performed on each �resource� given in web-resource-collection by users in each �role� given in auth-constraint . If no methods are mentioned , then everything is blocking .

So above answer should be ALL BLOCKING even for ADMIN . Please provide your thoughts on this

[ March 04, 2008: Message edited by: Akhil Maharaj ]
[ March 04, 2008: Message edited by: Akhil Maharaj ]

Hi ,

It is working now . I have had my code with unclosed </br

I think thats is what caused the problem . Thanks to both of you .
Akhil

Hi ,
your solution seems to be working. However when I check for empty , it is not giving the expected result .

Can you explain what I am missing ? Why I don't see " variable myPerson is gone" in the output ?

Thanks
Akhil

<jsp:useBean id="myPerson" class="hfsj.ch8.helper.Person" scope="page" /> <c:remove var="myPerson"/> <c:if test="${empty pageScope.myPerson}"> variable myPerson is gone. </c:if> <c:set var="dimension" value="twin_page" scope="page"/> <c:remove var="dimension"/> <c:if test="${empty pageScope.dimension}"> variable dimension is gone. </c:if>