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How to prevent a request scoped bean method being called multiple times in a JSF application?

Answer 1

A:

Make the button disabled with javascript once it's clicked.

Bozho 2010-10-14 10:02:06

This would work, unfortunately the real situation is a little different from my example. The redirect occurs from a third party page that is out of my control.

ceggers 2010-10-14 10:13:33

Answer 2

+1 A:

Make the bean session scoped and annotate the method with @PostConstruct. If you insist in keeping it request scoped, split that part out into a session scoped bean and make it a managed property of the request scoped bean using @ManagedProperty.

@ManagedBean
@RequestScoped
public class Bean {
    @ManagedProperty(value="#{insultBean}")
    private InsultBean insultBean;
}

and

@ManagedBean
@SessionScoped
public class InsultBean {
    @PostConstruct
    public void init() {
        this.bossInsult = generateBossInsult();
    }
}

Then JSF will take care that it's created and called only once during the session.

Update: sorry, you're using JSF 1.x. If it's 1.2, then the following achieves the same:

public class Bean {
    private InsultBean insultBean;
}

and

public class InsultBean {
    @PostConstruct
    public void init() {
        this.bossInsult = generateBossInsult();
    }
}

and

<managed-bean>
    <managed-bean-name>insultBean</managed-bean-name>
    <managed-bean-class>com.example.InsultBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
</managed-bean>

<managed-bean>
    <managed-bean-name>bean</managed-bean-name>
    <managed-bean-class>com.example.Bean</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
    <managed-property>
        <property-name>insultBean</property-name>
        <value>#{insultBean}</value>
    </managed-property>
</managed-bean>

BalusC 2010-10-14 10:58:38

Aww. Excuse me for not being precise enough with my example. I'm bound to JSF 1. I've experimented with putting bean in session scope but with the same result :(

ceggers 2010-10-14 11:13:25

See answer update.

BalusC 2010-10-14 11:19:14

Thank you. So I'm doomed with JSF 1.1?

ceggers 2010-10-14 11:30:57

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How to prevent a request scoped bean method being called multiple times in a JSF application?

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