| /* |
| * Copyright 1998-1999 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package com.sun.tools.jdi; |
| |
| import com.sun.jdi.*; |
| import java.util.*; |
| |
| public class ThreadGroupReferenceImpl extends ObjectReferenceImpl |
| implements ThreadGroupReference, VMListener |
| { |
| // Cached components that cannot change |
| String name; |
| ThreadGroupReference parent; |
| boolean triedParent; |
| |
| // This is cached only while the VM is suspended |
| private static class Cache extends ObjectReferenceImpl.Cache { |
| JDWP.ThreadGroupReference.Children kids = null; |
| } |
| |
| protected ObjectReferenceImpl.Cache newCache() { |
| return new Cache(); |
| } |
| |
| ThreadGroupReferenceImpl(VirtualMachine aVm,long aRef) { |
| super(aVm,aRef); |
| vm.state().addListener(this); |
| } |
| |
| protected String description() { |
| return "ThreadGroupReference " + uniqueID(); |
| } |
| |
| public String name() { |
| if (name == null) { |
| // Does not need synchronization, since worst-case |
| // static info is fetched twice (Thread group name |
| // cannot change) |
| try { |
| name = JDWP.ThreadGroupReference.Name. |
| process(vm, this).groupName; |
| } catch (JDWPException exc) { |
| throw exc.toJDIException(); |
| } |
| } |
| return name; |
| } |
| |
| public ThreadGroupReference parent() { |
| if (!triedParent) { |
| // Does not need synchronization, since worst-case |
| // static info is fetched twice (Thread group parent cannot |
| // change) |
| try { |
| parent = JDWP.ThreadGroupReference.Parent. |
| process(vm, this).parentGroup; |
| triedParent = true; |
| } catch (JDWPException exc) { |
| throw exc.toJDIException(); |
| } |
| } |
| return parent; |
| } |
| |
| public void suspend() { |
| List threads = threads(); |
| Iterator iter = threads.iterator(); |
| while (iter.hasNext()) { |
| ((ThreadReference)iter.next()).suspend(); |
| } |
| |
| List groups = threadGroups(); |
| iter = groups.iterator(); |
| while (iter.hasNext()) { |
| ((ThreadGroupReference)iter.next()).suspend(); |
| } |
| } |
| |
| public void resume() { |
| List threads = threads(); |
| Iterator iter = threads.iterator(); |
| while (iter.hasNext()) { |
| ((ThreadReference)iter.next()).resume(); |
| } |
| |
| List groups = threadGroups(); |
| iter = groups.iterator(); |
| while (iter.hasNext()) { |
| ((ThreadGroupReference)iter.next()).resume(); |
| } |
| } |
| |
| private JDWP.ThreadGroupReference.Children kids() { |
| JDWP.ThreadGroupReference.Children kids = null; |
| try { |
| Cache local = (Cache)getCache(); |
| |
| if (local != null) { |
| kids = local.kids; |
| } |
| if (kids == null) { |
| kids = JDWP.ThreadGroupReference.Children |
| .process(vm, this); |
| if (local != null) { |
| local.kids = kids; |
| if ((vm.traceFlags & vm.TRACE_OBJREFS) != 0) { |
| vm.printTrace(description() + |
| " temporarily caching children "); |
| } |
| } |
| } |
| } catch (JDWPException exc) { |
| throw exc.toJDIException(); |
| } |
| return kids; |
| } |
| |
| public List<ThreadReference> threads() { |
| return Arrays.asList((ThreadReference[])kids().childThreads); |
| } |
| |
| public List<ThreadGroupReference> threadGroups() { |
| return Arrays.asList((ThreadGroupReference[])kids().childGroups); |
| } |
| |
| public String toString() { |
| return "instance of " + referenceType().name() + |
| "(name='" + name() + "', " + "id=" + uniqueID() + ")"; |
| } |
| |
| byte typeValueKey() { |
| return JDWP.Tag.THREAD_GROUP; |
| } |
| } |