The content of this page has not been vetted since shifting away from MediaWiki. If you’d like to help, check out the how to help guide!
Purpose
An example Jython script to illustrate how to query a ThreadGroup recursively to gather all children Thread instances.
The output is something like the following:
Threads:
1: Reference Handler
2: Finalizer
3: Signal Dispatcher
4: Java2D Disposer
5: TimerQueue
6: AWT-XAWT
7: AWT-Shutdown
8: AWT-EventQueue-0
9: SocketListener
10: DestroyJavaVM
11: pool-3-thread-1
12: 3D-V-IMP-updater
13: pool-4-thread-1
14: list all threads
15: J3D-RenderingAttributesStructureUpdateThread
16: J3D-TimerThread
17: J3D-NotificationThread
18: J3D-MasterControl-1
19: J3D-Renderer-1
20: J3D-BehaviorStructureUpdateThread-1
21: J3D-GeometryStructureUpdateThread-1
22: J3D-SoundStructureUpdateThread-1
23: J3D-RenderingEnvironmentStructureUpdateThread-1
24: J3D-TransformStructureUpdateThread-1
25: J3D-BehaviorScheduler-1
26: J3D-RenderStructureUpdateThread-1
27: J3D-SoundSchedulerUpdateThread-1
28: J3D-InputDeviceScheduler-1
Code
from jarray import zeros
from java.lang import *
def findRootThreadGroup():
tg = Thread.currentThread().getThreadGroup()
root_tg = tg.getParent()
root_tg = tg
parent = root_tg.getParent()
while None != parent:
root_tg = parent
parent = parent.getParent()
return root_tg
def listGroup(list, group):
threads = zeros(group.activeCount(), Thread)
group.enumerate(threads, 0)
groups = zeros(group.activeGroupCount(), ThreadGroup)
group.enumerate(groups, 0)
for t in threads:
if None is not t: list.append(t.getName())
for g in groups:
if None is not g: listGroup(list, g)
def listThreadNames():
list = []
listGroup(list, findRootThreadGroup())
return list
IJ.log("Threads:")
i = 1
for thread in listThreadNames():
IJ.log(str(i) + ": " + thread)
i += 1
