...
For further details about DemoPage.class please have a look at the view-config section.
| Note |
|---|
|
If you don't need the PhaseEvent as parameter, you can just annotate your methods with @BeforePhase(...) and @AfterPhase(...). |
| Note |
|---|
|
@View is an interceptor. The disadvantage is that intercepted beans introduce an overhead.
If you would like to use this mechanism for implementing pre-render view logic, you should think about using the @PageBean annotation.
Further details are available in the view-config section.
|
...
CODI allows to specify the page-bean as optional meta-data via the view-config mechanism.
You can use this approach to load the page-bean before the rendering process starts. So the post-construct method (= methods annotated with @PostConstruct) will be invoked if it is needed. Furthermore, it's possible to use @BeforePhase(...) and @AfterPhase(...) without observer syntax of CDI.
| Code Block |
|---|
| java |
|---|
| java |
|---|
| title | View-config with Page-Bean |
|---|
|
@PageBean(LoginPage.class)
@Page
public final class Login implements ViewConfig
{
}
|
| Code Block |
|---|
|
//...
public final class LoginPage implements Serializable
{
@PostConstruct
protected void initBean()
{
//...
}
@AfterPhase(INVOKE_APPLICATION)
protected void postPageAction()
{
//...
}
@BeforePhase(RENDER_RESPONSE)
protected void preRenderView()
{
//...
}
}
|
... you can use @BeforePhase and @AfterPhase in the same way like the Phase-Listener Methods described above (just without the need of the PhaseEvent).
| Code Block |
|---|
| java |
|---|
| java |
|---|
| title | Page-Bean with alias annotations |
|---|
|
//...
public final class LoginPage implements Serializable
{
@PostConstruct
protected void initBean()
{
//...
}
@PreProcess
protected void prePageAction()
{
//...
}
@PreRenderView
protected void preRenderView()
{
//...
}
}
|
@PreProcess is invoked directly before the action-method. In comparison to @BeforePhase(INVOKE_APPLICATION), @PreProcess also works for immediate actions.
| Note |
|---|
|
For normal pre-render view logic you can use phase-listener methods in combination with @View.
Attention: the performance depends on the interceptor-performance of your CDI implementation. |
