| java.lang.Object
 com.sun.midp.suspend.AbstractSubsystem
All known Subclasses: com.sun.midp.suspend.NetworkSubsystem, com.sun.midp.suspend.SuspendSystem,
| AbstractSubsystem | | abstract public class AbstractSubsystem implements Subsystem(Code) | | An abstract subsystem that may contain other subsystems.
Contained subsytems are suspended after this subsystem suspend
and resumed prior to the subsystem resuming.
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| Method Summary | |
| public void | addSuspendDependency(SuspendDependency dep)
Adds a dependency that prevents from system suspend. | | final public int | getState()
Returns the current state. | | public void | registerSubsystem(Subsystem s)
Registers a subsystem this one depends on. | | public void | removeSuspendDependency(SuspendDependency dep)
Removes dependency that does not prevent from system suspend any more. | | final public void | resume()
If the current state is SUSPENDED, changes the state to
RESUMING, performs object-specific activation
operations and then changes the state to ACTIVE. | | protected void | resumeImpl()
Performs object-specific activation operations. | | void | resumed()
Confirms subsystem has been resumed. | | public void | suspend()
If the current state is ACTIVE, changes the state to
SUSPENDING, and initiates suspend routine. | | protected void | suspendImpl()
Performs object-specific suspend operations. | | void | suspended()
Confirms subsystem has been suspended. | | public void | unregisterSubsystem(Subsystem s)
Unregisters a subsystem this one depends on. | | protected void | updateSuspendStatus()
Checks if there are dependencies that prevent from system suspend,
if there are no ones, and the state is SUSPENDING suspend routine. |
| classSecurityToken | | static SecurityToken classSecurityToken(Code) | | Security token for provileged access to internal API's.
Note it must stay package private.
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| lock | | final Object lock(Code) | | State transition synchronization lock.
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| state | | int state(Code) | | Current subsystem state.
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| addSuspendDependency | | public void addSuspendDependency(SuspendDependency dep)(Code) | | Adds a dependency that prevents from system suspend.
Parameters:
dep - dependency to add |
| getState | | final public int getState()(Code) | | Returns the current state.
current state if the subsystem |
| registerSubsystem | | public void registerSubsystem(Subsystem s)(Code) | | Registers a subsystem this one depends on.
Parameters:
s - subsystem this one depends on. |
| removeSuspendDependency | | public void removeSuspendDependency(SuspendDependency dep)(Code) | | Removes dependency that does not prevent from system suspend any more.
Then invokes suspend notification if there are no dependencies left.
Parameters:
dep - dependency to remove |
| resume | | final public void resume() throws StateTransitionException(Code) | | If the current state is SUSPENDED, changes the state to
RESUMING, performs object-specific activation
operations and then changes the state to ACTIVE.
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| resumeImpl | | protected void resumeImpl()(Code) | | Performs object-specific activation operations.
Default implementation makes nothing.
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| resumed | | void resumed()(Code) | | Confirms subsystem has been resumed. Listeners/waiters
can be invoked here.
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| suspend | | public void suspend() throws StateTransitionException(Code) | | If the current state is ACTIVE, changes the state to
SUSPENDING, and initiates suspend routine. The suspend
routine is pstponed until all suspend dependences are removed.
If there are no dependencies currently, the suspend routine is
invoked immediately.
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| suspendImpl | | protected void suspendImpl()(Code) | | Performs object-specific suspend operations.
Default implementation makes nothing.
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| suspended | | void suspended()(Code) | | Confirms subsystem has been suspended. Listeners/waiters
can be invoked here.
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| unregisterSubsystem | | public void unregisterSubsystem(Subsystem s)(Code) | | Unregisters a subsystem this one depends on.
Parameters:
s - subsystem this one depends on. |
| updateSuspendStatus | | protected void updateSuspendStatus()(Code) | | Checks if there are dependencies that prevent from system suspend,
if there are no ones, and the state is SUSPENDING suspend routine.
The suspend routine performs first object-specific ations then
invokes suspend() methods for all registered subsytems.
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