J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-1999 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * 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 com.sun.tools.jdi; |
| 27 | |
| 28 | import com.sun.jdi.*; |
| 29 | import java.util.*; |
| 30 | |
| 31 | public class ThreadGroupReferenceImpl extends ObjectReferenceImpl |
| 32 | implements ThreadGroupReference, VMListener |
| 33 | { |
| 34 | // Cached components that cannot change |
| 35 | String name; |
| 36 | ThreadGroupReference parent; |
| 37 | boolean triedParent; |
| 38 | |
| 39 | // This is cached only while the VM is suspended |
| 40 | private static class Cache extends ObjectReferenceImpl.Cache { |
| 41 | JDWP.ThreadGroupReference.Children kids = null; |
| 42 | } |
| 43 | |
| 44 | protected ObjectReferenceImpl.Cache newCache() { |
| 45 | return new Cache(); |
| 46 | } |
| 47 | |
| 48 | ThreadGroupReferenceImpl(VirtualMachine aVm,long aRef) { |
| 49 | super(aVm,aRef); |
| 50 | vm.state().addListener(this); |
| 51 | } |
| 52 | |
| 53 | protected String description() { |
| 54 | return "ThreadGroupReference " + uniqueID(); |
| 55 | } |
| 56 | |
| 57 | public String name() { |
| 58 | if (name == null) { |
| 59 | // Does not need synchronization, since worst-case |
| 60 | // static info is fetched twice (Thread group name |
| 61 | // cannot change) |
| 62 | try { |
| 63 | name = JDWP.ThreadGroupReference.Name. |
| 64 | process(vm, this).groupName; |
| 65 | } catch (JDWPException exc) { |
| 66 | throw exc.toJDIException(); |
| 67 | } |
| 68 | } |
| 69 | return name; |
| 70 | } |
| 71 | |
| 72 | public ThreadGroupReference parent() { |
| 73 | if (!triedParent) { |
| 74 | // Does not need synchronization, since worst-case |
| 75 | // static info is fetched twice (Thread group parent cannot |
| 76 | // change) |
| 77 | try { |
| 78 | parent = JDWP.ThreadGroupReference.Parent. |
| 79 | process(vm, this).parentGroup; |
| 80 | triedParent = true; |
| 81 | } catch (JDWPException exc) { |
| 82 | throw exc.toJDIException(); |
| 83 | } |
| 84 | } |
| 85 | return parent; |
| 86 | } |
| 87 | |
| 88 | public void suspend() { |
| 89 | List threads = threads(); |
| 90 | Iterator iter = threads.iterator(); |
| 91 | while (iter.hasNext()) { |
| 92 | ((ThreadReference)iter.next()).suspend(); |
| 93 | } |
| 94 | |
| 95 | List groups = threadGroups(); |
| 96 | iter = groups.iterator(); |
| 97 | while (iter.hasNext()) { |
| 98 | ((ThreadGroupReference)iter.next()).suspend(); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | public void resume() { |
| 103 | List threads = threads(); |
| 104 | Iterator iter = threads.iterator(); |
| 105 | while (iter.hasNext()) { |
| 106 | ((ThreadReference)iter.next()).resume(); |
| 107 | } |
| 108 | |
| 109 | List groups = threadGroups(); |
| 110 | iter = groups.iterator(); |
| 111 | while (iter.hasNext()) { |
| 112 | ((ThreadGroupReference)iter.next()).resume(); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | private JDWP.ThreadGroupReference.Children kids() { |
| 117 | JDWP.ThreadGroupReference.Children kids = null; |
| 118 | try { |
| 119 | Cache local = (Cache)getCache(); |
| 120 | |
| 121 | if (local != null) { |
| 122 | kids = local.kids; |
| 123 | } |
| 124 | if (kids == null) { |
| 125 | kids = JDWP.ThreadGroupReference.Children |
| 126 | .process(vm, this); |
| 127 | if (local != null) { |
| 128 | local.kids = kids; |
| 129 | if ((vm.traceFlags & vm.TRACE_OBJREFS) != 0) { |
| 130 | vm.printTrace(description() + |
| 131 | " temporarily caching children "); |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | } catch (JDWPException exc) { |
| 136 | throw exc.toJDIException(); |
| 137 | } |
| 138 | return kids; |
| 139 | } |
| 140 | |
| 141 | public List<ThreadReference> threads() { |
| 142 | return Arrays.asList((ThreadReference[])kids().childThreads); |
| 143 | } |
| 144 | |
| 145 | public List<ThreadGroupReference> threadGroups() { |
| 146 | return Arrays.asList((ThreadGroupReference[])kids().childGroups); |
| 147 | } |
| 148 | |
| 149 | public String toString() { |
| 150 | return "instance of " + referenceType().name() + |
| 151 | "(name='" + name() + "', " + "id=" + uniqueID() + ")"; |
| 152 | } |
| 153 | |
| 154 | byte typeValueKey() { |
| 155 | return JDWP.Tag.THREAD_GROUP; |
| 156 | } |
| 157 | } |