ClassStats


1   /*******************************************************************************
2    * Copyright (c) 2000, 2004 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Common Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/cpl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.osgi.framework.stats;
12  
13  import java.util.ArrayList  ;
14  
15  /**
16   * Maintain statistics about a loaded class.
17   */
18  public class ClassStats {
19      private String   className; // fully qualified name of this class 
20      private ClassloaderStats classloader; // the classloader that loaded this class
21      private int loadOrder = -1;
22  
23      private long timestamp; // time at which this class was loaded
24      private long timeLoading; // time to load the class
25      private long timeLoadingOthers = 0; // time spent loading classes which has been triggered by this class  
26  
27      // parentage of classes loaded
28      private ClassStats loadedBy = null; // a reference to the class that loaded this class
29      private ArrayList   loaded = new ArrayList  (2); // a reference to the classes that this class loaded
30  
31      private boolean duringStartup; // indicate if the class was loaded during platform startup
32  
33      //information to retrieve the stacktrace from the file
34      private long traceStart = -1;
35      private long traceEnd = -1;
36  
37      public ClassStats(String   name, ClassloaderStats classloader) {
38          className = name;
39          timestamp = System.currentTimeMillis();
40          duringStartup = StatsManager.isBooting();
41          this.classloader = classloader;
42      }
43  
44      public void setLoadOrder(int order) {
45          loadOrder = order;
46      }
47  
48      public void loadingDone() {
49          timeLoading = System.currentTimeMillis() - timestamp;
50      }
51  
52      public long getTimeLoading() {
53          return timeLoading;
54      }
55  
56      public long getLocalTimeLoading() {
57          return timeLoading - timeLoadingOthers;
58      }
59  
60      public void addTimeLoadingOthers(long time) {
61          timeLoadingOthers = timeLoadingOthers + time;
62      }
63  
64      public long getTraceStart() {
65          return traceStart;
66      }
67  
68      public long getTraceEnd() {
69          return traceEnd;
70      }
71  
72      public void setTraceStart(long position) {
73          traceStart = position;
74      }
75  
76      public void setTraceEnd(long position) {
77          traceEnd = position;
78      }
79  
80      public void loaded(ClassStats child) {
81          loaded.add(child);
82      }
83  
84      public void setLoadedBy(ClassStats parent) {
85          loadedBy = parent;
86      }
87  
88      public ClassStats getLoadedBy() {
89          return loadedBy;
90      }
91  
92      public ArrayList   getLoadedClasses() {
93          return loaded;
94      }
95  
96      public String   getClassName() {
97          return className;
98      }
99  
100     public boolean isStartupClass() {
101         return duringStartup;
102     }
103 
104     public ClassloaderStats getClassloader() {
105         return classloader;
106     }
107 
108     public int getLoadOrder() {
109         return loadOrder;
110     }
111 
112     public long getTimestamp() {
113         return timestamp;
114     }
115 
116     public void toBaseClass() {
117         duringStartup = true;
118         loadOrder = -2;
119     }
120 }
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