java.lang.isolate
Class AggregateStateManager

java.lang.Object
  |
  +--java.lang.isolate.AggregateStateManager

class AggregateStateManager

extends java.lang.Object

A global map of aggregate-wide Isolate state.

All globally useful state related to an isolate is kept here, in IsolateStatus objects. The IsolateStatus is Exportable (exported under the isolate's GUID). All this state may continue to exist after an isolate has terminated (any active handle on the isolate may query this or may create an EventLink to the isolate).

The parent isolate will advance a new isolate from 'INVALID' to 'NEWBORN' to 'STARTING'. The main thread of the isolate will advance it to 'RUNNING'. The IsolateBackEnd in the isolate will advance it to 'DYING' and 'DEAD'. Thus we avoid race conditions.

XXX: Kernel entry/exit on each method is really verbose and ugly.

Inner Class Summary

(package private) static class	AggregateStateManager.EventStatusHandle A handle on an IsolateStatus used by an EventLink (enables state tracking in the IsolateStatus).
private static class	AggregateStateManager.IsolateStatus Global state for a single isolate.
(package private) static class	AggregateStateManager.IsolateStatusHandle A handle on an IsolateStatus for use by an Isolate object.

Field Summary

private static java.lang.String	EXIT_ON_LAST
private int	isolateCount
private java.lang.Object	lock

Constructor Summary

(package private)

AggregateStateManager()

Method Summary

(package private) void	isolateDied(IsolateBackEnd ibe) Invoked by IsolateBackEnd.event(edu.utah.janosvm.sys.EventTeamHandle, edu.utah.janosvm.sys.TeamReservation, edu.utah.janosvm.sys.TeamEvent) to indicate when the given isolate has died.
(package private) AggregateStateManager.EventStatusHandle	newEventHandleOn(java.lang.Long targetGUID)
(package private) AggregateStateManager.IsolateStatusHandle	newHandleOn(java.lang.Long targetGUID) Create a new handle on the given Isolate's IsolateState
(package private) AggregateStateManager.IsolateStatusHandle	newHandleOn(java.lang.Long targetGUID, IsolateServer isoServer) Create a new handle on the given Isolate's IsolateState
(package private) AggregateStateManager.IsolateStatusHandle	registerNewIsolate(java.lang.Long targetGUID)
(package private) AggregateStateManager.IsolateStatusHandle	registerNewIsolate(java.lang.Long targetGUID, IsolateServer isoServer) Register a new isolate with the aggregate.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait, wait0

Field Detail

EXIT_ON_LAST

private static final java.lang.String EXIT_ON_LAST

lock

private final java.lang.Object lock

isolateCount

private int isolateCount

Constructor Detail

AggregateStateManager

AggregateStateManager()

Method Detail

registerNewIsolate

AggregateStateManager.IsolateStatusHandle registerNewIsolate(java.lang.Long targetGUID)

registerNewIsolate

AggregateStateManager.IsolateStatusHandle registerNewIsolate(java.lang.Long targetGUID,
                                                             IsolateServer isoServer)

Register a new isolate with the aggregate. Invoked exactly once for each isolate (see {@linkIsolate#Isolate}).

newHandleOn

AggregateStateManager.IsolateStatusHandle newHandleOn(java.lang.Long targetGUID)

Create a new handle on the given Isolate's IsolateState

newHandleOn

AggregateStateManager.IsolateStatusHandle newHandleOn(java.lang.Long targetGUID,
                                                      IsolateServer isoServer)

Create a new handle on the given Isolate's IsolateState

newEventHandleOn

AggregateStateManager.EventStatusHandle newEventHandleOn(java.lang.Long targetGUID)

isolateDied

void isolateDied(IsolateBackEnd ibe)

Invoked by IsolateBackEnd.event(edu.utah.janosvm.sys.EventTeamHandle, edu.utah.janosvm.sys.TeamReservation, edu.utah.janosvm.sys.TeamEvent) to indicate when the given isolate has died.

Warning: Invoked in the context of an arbitrary team