Page History

...

package org.apache.tapestry5.tutorial.pages.address;

import org.apache.tapestry5.annotations.InjectPage;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.hibernate.annotations.CommitAfter;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.tutorial.entities.Address;
import org.apache.tapestry5.tutorial.pages.Index;
import org.hibernate.Session;

public class CreateAddress
{
    @Property
    private Address address;

    @Inject
    private Session session;

    @InjectPage
    private Index index;

    @CommitAfter
    Object onSuccess()
    {
        session.persist(address);

        return index;
    }
}

The Inject annotation tells Tapestry to inject a service into the annotated field; Tapestry includes a sophisticated Inversion of Control container (similar in many ways to Spring) that is very good at locating available services by type, rather than by a string id. In any case, the Hibernate Session object is exposed as a Tapestry IoC service, ready to be injected (this is one of the things provided by the tapestry-hibernate module).

Tapestry automatically starts a transaction as necessary; however that transaction will be aborted at the end of the request. If we make changes to persistent objects, such as adding a new Address object, then it is necessary to commit the transaction.

The CommitAfter annotation can be applied to any component method; if the method completes normally, the transaction will be committed (and a new transaction started to replace the committed transaction).

...