001: /*
002: * Copyright (c) 1998-2005 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: * Free SoftwareFoundation, Inc.
023: * 59 Temple Place, Suite 330
024: * Boston, MA 02111-1307 USA
025: *
026: * @author Sam
027: */
028:
029: package com.caucho.tools.profiler;
030:
031: import com.caucho.loader.EnvironmentLocal;
032: import com.caucho.util.LruCache;
033:
034: import java.util.Collection;
035: import java.util.Comparator;
036: import java.util.Iterator;
037: import java.util.LinkedList;
038: import java.util.Set;
039: import java.util.TreeSet;
040:
041: /**
042: * The main entry point for profiling. This class is used to obtain instances
043: * of {@link ProfilerPoint}, which are then used during execution of code to
044: * demarcate the code to be profiled.
045: * <p/>
046: * A {@link ProfilerManager} for the current {@link ClassLoader} is obtained
047: * with {@link #getLocal()}.
048: */
049: public class ProfilerManager {
050: private static final EnvironmentLocal<ProfilerManager> _local = new EnvironmentLocal<ProfilerManager>();
051:
052: private ProfilerPoint _root;
053:
054: private boolean _isEnabled = false;
055:
056: private ProfilerManager() {
057: new ProfilerAdmin(this );
058:
059: _root = new ProfilerPoint(this , "");
060: }
061:
062: public static ProfilerManager getLocal() {
063: synchronized (_local) {
064: ProfilerManager local = _local.get();
065:
066: if (local == null) {
067: local = new ProfilerManager();
068: _local.set(local);
069: }
070:
071: return local;
072: }
073: }
074:
075: public ProfilerPoint getRoot() {
076: return _root;
077: }
078:
079: public ProfilerPoint getProfilerPoint(String name) {
080: return _root.addProfilerPoint(name);
081: }
082:
083: /**
084: * Set to true to enable profiling, default false.
085: */
086: public void setEnabled(boolean isEnabled) {
087: _isEnabled = isEnabled;
088: }
089:
090: public boolean isEnabled() {
091: return _isEnabled;
092: }
093:
094: public void enable() {
095: if (!_isEnabled) {
096: reset();
097: _isEnabled = true;
098: }
099: }
100:
101: public void disable() {
102: _isEnabled = false;
103: }
104:
105: public ProfilerPoint addProfilerPoint(String name) {
106: return _root.addProfilerPoint(name);
107: }
108:
109: public ProfilerPoint getCategorizingProfilerPoint(String name) {
110: return _root.addProfilerPoint(name);
111: }
112:
113: /**
114: * Clear all profiling information.
115: */
116: public void reset() {
117: _root.reset();
118: }
119:
120: public String toString() {
121: return "ProfilerManager[" + getClass().getClassLoader() + "]";
122: }
123:
124: }
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