JBoss MicroKernel Aspects

The kernel provides the following optional attributes to be used in a container configuration.

Injection

Injects dependent objects into the managed POJO.

Lifecycle

Invokes configurable lifecycle methods at the relevent point in the deployment.

• create - internal resource configuration

• start - may use other services

• stop - tidies up any resources used from other services

• destroy - removes internal configuration

NOTE: the names are configurable

Valve

Prevents new invocations and allows inflight invocations to complete before undeployment.

State

Invokes callbacks for storing/restoring state across redeployment.

JMX manageable

Makes the POJO/service a JMX MBean

Design

• Definitions

• The core kernel

• The bootstrap

• Configuration

• Kernel aspects

• Deployment

• JBoss Server implications