01: /*
02: * Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package sun.management;
27:
28: import sun.management.counter.Counter;
29:
30: /**
31: * Hotspot internal management interface for the thread system.
32: */
33: public interface HotspotThreadMBean {
34:
35: /**
36: * Returns the current number of VM internal threads.
37: *
38: * @return the current number of VM internal threads.
39: */
40: public int getInternalThreadCount();
41:
42: /**
43: * Returns a <tt>Map</tt> of the name of all VM internal threads
44: * to the thread CPU time in nanoseconds. The returned value is
45: * of nanoseconds precision but not necessarily nanoseconds accuracy.
46: * <p>
47: *
48: * @return a <tt>Map</tt> object of the name of all VM internal threads
49: * to the thread CPU time in nanoseconds.
50: *
51: * @throws java.lang.UnsupportedOperationException if the Java virtual
52: * machine does not support CPU time measurement.
53: *
54: * @see java.lang.management.ThreadMBean#isThreadCpuTimeSupported
55: */
56: public java.util.Map<String, Long> getInternalThreadCpuTimes();
57:
58: /**
59: * Returns a list of internal counters maintained in the Java
60: * virtual machine for the thread system.
61: *
62: * @return a list of internal counters maintained in the VM
63: * for the thread system.
64: */
65: public java.util.List<Counter> getInternalThreadingCounters();
66: }
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