Which choice describes the lifecycle of events in JSR-286?

In JSR-286, which defines the Portlet 2.0 specification, the lifecycle of events is characterized by the ability for events to be both published and processed. This dual capability is central to the way that portlets can communicate with one another within a portal environment.

When a portlet publishes an event, it broadcasts that event to other portlets that have expressed interest in handling such an event. The interested portlets can then process these events, facilitating inter-portlet communication. This model allows for a flexible architecture where portlets can work together to provide a more cohesive user experience.

For example, if one portlet (like a calendar) triggers an event when a user selects a specific date, other portlets (such as to-do lists or reminders) can listen for that event and update their displays accordingly. This flow, where events are both sent (published) and received (processed), is crucial for building dynamic and interactive applications in a portal.

The structure of JSR-286 encourages a rich interaction model among portlets, thus supporting a more integrated approach to application development within the Liferay ecosystem. The understanding of this lifecycle is essential for developers, as it underpins efficient communication strategies between portlets.