org.jvnet.hk2.component.RunLevelState Maven / Gradle / Ivy
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package org.jvnet.hk2.component;
/**
* Holds the state(s) for a particular RunLevelService.
*
* @author Jeff Trent
*
* @since 3.1
*
*/
public interface RunLevelState {
/**
* The environment value for this state.
*
* @return the class type used to uniquely identify the environment in
* context, or null representing the default environment.
*/
Class getEnvironment();
/**
* The current run level state. This represents the last run level
* successfully achieved by the underlying RunLevelService responsible
* for this environment.
*
* @return the current run level, or null if no run level has been
* been achieved.
*/
Integer getCurrentRunLevel();
/**
* The planned run level state. If this value is different from
* current run level, this signifies movement of the underlying
* RunLevelService.
*
* @return the planned run level, or null if there is no planned
* level. This value is established by a call to
* {@link RunLevelService#proceedTo(int)}.
*/
Integer getPlannedRunLevel();
}