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1
28
29 package com.caucho.util;
30
31 import com.caucho.log.Log;
32
33 import java.util.logging.Level  ;
34 import java.util.logging.Logger ;
35
36 public class CpuUsage {
37 static Logger log = Log.open(CpuUsage.class);
38
39 private static CauchoNative jni;
40 private static boolean triedLoading;
41
42 private int pid;
43
44 private long time;
45 private long interval;
46
47 private long userTime;
48 private long systemTime;
49
50 private CpuUsage()
51 {
52 }
53
54 public static synchronized CpuUsage create()
55 {
56 if (jni == null && ! triedLoading) {
57 triedLoading = true;
58 try {
59 jni = CauchoNative.create();
60 } catch (Throwable e) {
61 log.log(Level.FINE, e.toString(), e);
62 }
63 }
64
65 CpuUsage usage = new CpuUsage();
66
67 if (jni == null)
68 return usage;
69
70 usage.update(Alarm.getCurrentTime());
71
72 return usage;
73 }
74
75 public void update(long now)
76 {
77 time = now;
78
79 if (jni == null)
80 return;
81
82 synchronized (jni) {
83 jni.calculateUsage();
84 pid = jni.getPid();
85 userTime = (long) (jni.getUserTime() * 1000);
86 systemTime = (long) (jni.getSystemTime() * 1000);
87 }
88 }
89
90 public void copy(CpuUsage source)
91 {
92 pid = source.pid;
93 time = source.time;
94
95 userTime = source.userTime;
96 systemTime = source.systemTime;
97 }
98
99 public void clear()
100 {
101 pid = -1;
102 time = 0;
103 interval = 0;
104 userTime = 0;
105 systemTime = 0;
106 }
107
108 public void add(CpuUsage base, CpuUsage source)
109 {
110 if (pid == -1) {
111 pid = source.getPid();
112 time = source.getTime();
113 interval = time - base.getTime();
114 }
115 else if (pid == source.getPid())
116 return;
117
118 userTime += source.getUserTime() - base.getUserTime();
119 systemTime += source.getSystemTime() - base.getSystemTime();
120 }
121
122 public int getPid()
123 {
124 return pid;
125 }
126
127 public long getTime()
128 {
129 return time;
130 }
131
132 public long getInterval()
133 {
134 return interval;
135 }
136
137 public long getUserTime()
138 {
139 return userTime;
140 }
141
142 public long getSystemTime()
143 {
144 return systemTime;
145 }
146
147 boolean setUser(String user, String group)
148 throws Exception
149 {
150 if (jni == null)
151 return false;
152
153 else if (user != null) {
154 synchronized (jni) {
155 return jni.setUser(user, group);
156 }
157 }
158 else
159 return false;
160 }
161 }
162
163
164 |
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