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https://issues.apache.org/jira/browse/SLING-4026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349154#comment-14349154
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Nicolas commented on SLING-4026:
--------------------------------
We have currently the same problem on our production code when we are
restarting our server. Sometimes the resource can be adapted, sometimes not.
What do you propose as a workaround until the problem is fixed?
* A: {code}
@Service
@Component(immediate = true)
public class ExampleComponent {
@Reference(target =
"(models.adapter.implementationClass=com.example.ExampleComponent)")
private AdapterFactory adaptorFactory;
@Activate
public void activate(ComponentContext context) {
Resource resource = ....
SlingModelExample example = adaptorFactory.getAdapter(resource,
SlingModelExample.class);
}
}
{code}
* B:
{code}
@Service
@Component(immediate = true)
@Properties({
@Property(name = "event.topics", value = {
SlingConstants.TOPIC_ADAPTER_FACTORY_ADDED
}, propertyPrivate = true),
@Property(name = EventConstants.EVENT_FILTER, value =
"(adapters=com.example.ExampleComponent)", propertyPrivate = true)
})
public class ExampleComponent implements EventHandler {
@Override
public void handleEvent(final Event event) {
Resource resource = ....
SlingModelExample example = resource.adaptTo(SlingModelExample.class);
}
}
{code}
> Adapter Factory Race Condition
> ------------------------------
>
> Key: SLING-4026
> URL: https://issues.apache.org/jira/browse/SLING-4026
> Project: Sling
> Issue Type: Bug
> Components: Extensions
> Affects Versions: Adapter 2.1.2
> Reporter: JBodkin
> Labels: models
> Attachments: racer.zip
>
>
> During initialization of a bundle, it is possible to encounter a race
> condition in which the BundleTrackerCustomizer::addingBundle(Bundle bundle,
> BundleEvent event) is triggered after the bundle has begun initialization of
> a immediate component.
> {code:java}
> @Component(immediate = true)
> @Service
> public class ExampleImpl {
> @Activate
> public void activate(ComponentContext context) {
> Resource resource = ....
> // Race condition possible here... Could be executed before the
> BundleTracker (ModelPackageBundleListener)
> SlingModelExample example = resource.adaptTo(SlingModelExample);
> }
> }
> {code}
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