com.sun.jdi

Interface ThreadGroupReference

All Superinterfaces:

Mirror, ObjectReference, Value

@Exported
public interface ThreadGroupReference
extends ObjectReference

A thread group object from the target VM. A ThreadGroupReference is an ObjectReference with additional access to threadgroup-specific information from the target VM.

Since:

1.3

Field Summary

Fields inherited from interface com.sun.jdi.ObjectReference

INVOKE_NONVIRTUAL, INVOKE_SINGLE_THREADED

Method Summary

Modifier and Type	Method and Description
String	name() Returns the name of this thread group.
ThreadGroupReference	parent() Returns the parent of this thread group.
void	resume() Resumes all threads in this thread group.
void	suspend() Suspends all threads in this thread group.
List<ThreadGroupReference>	threadGroups() Returns a List containing each active ThreadGroupReference in this thread group.
List<ThreadReference>	threads() Returns a List containing a ThreadReference for each live thread in this thread group.

Methods inherited from interface com.sun.jdi.ObjectReference

disableCollection, enableCollection, entryCount, equals, getValue, getValues, hashCode, invokeMethod, isCollected, owningThread, referenceType, referringObjects, setValue, uniqueID, waitingThreads

Methods inherited from interface com.sun.jdi.Value

type

Methods inherited from interface com.sun.jdi.Mirror

toString, virtualMachine

Method Detail

name

String name()

Returns the name of this thread group.

Returns:

the string containing the thread group name.

parent

ThreadGroupReference parent()

Returns the parent of this thread group.

Returns:

a ThreadGroupReference mirroring the parent of this thread group in the target VM, or null if this is a top-level thread group.

suspend

void suspend()

Suspends all threads in this thread group. Each thread in this group and in all of its subgroups will be suspended as described in ThreadReference.suspend(). This is not guaranteed to be an atomic operation; if the target VM is not interrupted at the time this method is called, it is possible that new threads will be created between the time that threads are enumerated and all of them have been suspended.

Throws:

VMCannotBeModifiedException - if the VirtualMachine is read-only - see VirtualMachine.canBeModified().

resume

void resume()

Resumes all threads in this thread group. Each thread in this group and in all of its subgroups will be resumed as described in ThreadReference.resume().

Throws:

VMCannotBeModifiedException - if the VirtualMachine is read-only - see VirtualMachine.canBeModified().

threads

List<ThreadReference> threads()

Returns a List containing a ThreadReference for each live thread in this thread group. Only the live threads in this immediate thread group (and not its subgroups) are returned. A thread is alive if it has been started and has not yet been stopped.

Returns:

a List of ThreadReference objects mirroring the live threads from this thread group in the target VM.

threadGroups

List<ThreadGroupReference> threadGroups()

Returns a List containing each active ThreadGroupReference in this thread group. Only the active thread groups in this immediate thread group (and not its subgroups) are returned. See java.lang.ThreadGroup for information about 'active' ThreadGroups.

Returns:

a List of ThreadGroupReference objects mirroring the active thread groups from this thread group in the target VM.