Extending Teller WS example

[glindstrom]

I am seeking to extend the Teller WS example of Chapter 5 to support additional functionality, namely, transfer of funds between accounts, e.g. as provided by the TxController.transferFunds.

I realize this will involve extending the ws ejb-jar.xml to include additional ejb-ref's.

But I am baffled how the ejb-ref.xml as given works -- it includes

 <ejb-ref>
 <ejb-ref-name>ejb/account</ejb-ref-name>
 <ejb-ref-type>Session</ejb-ref-type>
 <home>com.sun.ebank.ejb.customer.CustomerHome</home>
 <remote>com.sun.ebank.ejb.customer.Customer</remote>
 </ejb-ref>

which is used in TellerBean.getController() to instantiate an AccountControllerHome object

 AccountControllerHome home = (AccountControllerHome)
 ctx.lookup("java:comp/env/ejb/account");

How can this be, given that the ejb-ref specifies a CustomerHome?

Thanks,
--Gary

[glindstrom]

I am still baffled by the issue I raised in my prior post, but I have been able to get TellerBean to support funds transfer through use of TxController.

For the record, it's easy -- here are the steps:

1) In dd/ws/ejb-jar.xml, in the element for TellerBean, add

 <ejb-ref>
 <ejb-ref-name>ejb/tx</ejb-ref-name>
 <ejb-ref-type>Session</ejb-ref-type>
 <home>com.sun.ebank.ejb.tx.TxControllerHome</home>
 <remote>com.sun.ebank.ejb.tx.TxController</remote>
 </ejb-ref>

2) In dd/ws/jboss.xml, in the element for TellerBean, add

 <ejb-ref>
 <ejb-ref-name>ejb/tx</ejb-ref-name>
 <jndi-name>ebankTxController</jndi-name>
 </ejb-ref>

3) Add to TellerEndpoint.java:

 public BigDecimal transfer(String fromAccountID, String toAccountID,
 BigDecimal amountToTransfer)
 throws RemoteException;

4) In TellerBean.java, instantiate a TxController proxy by:

 InitialContext ctx = new InitialContext();
 TxControllerHome txHome = (TxControllerHome)
 ctx.lookup("java:comp/env/ejb/tx");

 TxController txController = txHome.create();

5) Within TellerBean.transfer(String,String,BigDecimal), invoke whatever method of TxController you want for your "business logic" -- in my case, it was TxController.transferFunds(BigDecimal,String,String,String). It works great, including transaction logging, etc., as verified by the bank/main web app.

Back to your regularly scheduled hacking,
--Gary

[chiliway]

I have the same question.
It seems to me it's inconsistent in the content of ejb-ref.
Can anybody tell me why the home and remote interfaces point to a Customer Bean?

"glindstrom" wrote:
I am seeking to extend the Teller WS example of Chapter 5 to support additional functionality, namely, transfer of funds between accounts, e.g. as provided by the TxController.transferFunds.

I realize this will involve extending the ws ejb-jar.xml to include additional ejb-ref's.

But I am baffled how the ejb-ref.xml as given works -- it includes

 <ejb-ref>
 <ejb-ref-name>ejb/account</ejb-ref-name>
 <ejb-ref-type>Session</ejb-ref-type>
 <home>com.sun.ebank.ejb.customer.CustomerHome</home>
 <remote>com.sun.ebank.ejb.customer.Customer</remote>
 </ejb-ref>

which is used in TellerBean.getController() to instantiate an AccountControllerHome object

 AccountControllerHome home = (AccountControllerHome)
 ctx.lookup("java:comp/env/ejb/account");

How can this be, given that the ejb-ref specifies a CustomerHome?

Thanks,
--Gary