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1
25
26 package org.objectweb.jonas.webapp.jonasadmin.monitoring;
27
28 import java.awt.Color  ;
30 import java.awt.Graphics ;
31 import java.awt.image.BufferedImage ;
32 import java.io.IOException ;
33 import java.io.OutputStream ;
34
35 import javax.servlet.ServletException ;
36 import javax.servlet.http.HttpServlet ;
37 import javax.servlet.http.HttpServletRequest ;
38 import javax.servlet.http.HttpServletResponse ;
39 import javax.servlet.http.HttpSession ;
40
41 import org.objectweb.jonas.jmx.J2eeObjectName;
42 import org.objectweb.jonas.jmx.JonasManagementRepr;
43 import org.objectweb.jonas.webapp.jonasadmin.WhereAreYou;
44
45 import Acme.JPM.Encoders.GifEncoder;
46
47
51 public class MemoryGraphServlet extends HttpServlet {
52
53 private static final int HEIGHT = 180;
54 private static final int TOP_MARGIN = 35;
55 private static final int RIGHT_MARGIN = 80;
56 private static final int BOTTOM_MARGIN = 10;
57 private static final int LEFT_MARGIN = 70;
58 private static final int HORIZONTAL_SPACE = 30;
59
60 private static final int Y_LENGTH = HEIGHT - TOP_MARGIN - BOTTOM_MARGIN; private static final int GAUGE_WIDTH = 10;
62
63 private static final Color BG_COLOR = new Color (0x006699);
64 private static final Color FG_COLOR = Color.white;
65 private static final Color GRAPHICS_BG_COLOR = Color.lightGray;
66 private static final Color GRAPHICS_FG_COLOR = Color.darkGray;
67 private static final Color AXIS_COLOR = Color.white;
68 private static final Color TEXT_COLOR = Color.white;
69
70
80 public void doGet(HttpServletRequest req, HttpServletResponse res)
81 throws IOException , ServletException {
82
83 HttpSession oSession = req.getSession();
84 WhereAreYou oWhere = (WhereAreYou) oSession.getAttribute(WhereAreYou.SESSION_NAME);
85
86 res.setContentType("image/gif");
87 OutputStream out = res.getOutputStream();
88
89 Long [] data = (Long []) JonasManagementRepr.getAttribute(J2eeObjectName.J2EEServer(oWhere.
91 getCurrentDomainName(), oWhere.getCurrentJonasServerName()), "tableMeasures");
92 int xLength = 2 * data.length;
93 int width = LEFT_MARGIN + xLength + HORIZONTAL_SPACE + GAUGE_WIDTH + RIGHT_MARGIN;
94
95 BufferedImage img = new BufferedImage (width, HEIGHT, BufferedImage.TYPE_INT_RGB);
96 Graphics g = img.getGraphics();
97
98 g.setColor(BG_COLOR);
100 g.fillRect(0, 0, width, HEIGHT);
101
102
104 g.setColor(GRAPHICS_BG_COLOR);
106 g.fillRect(cartesianXToGraphicsX(0), cartesianYToGraphicsY(Y_LENGTH), xLength - 1, Y_LENGTH);
107
108 long yMax = data[0].longValue();
110 for (int i = 1; i < data.length; i++) {
111 yMax = Math.max(yMax, data[i].longValue());
112
113 }
115 long tmp = yMax;
116 int n = 0;
117 while ((tmp / 10) >= 1) {
118 tmp = tmp / 10;
119 n++;
120 }
121 long k = tmp % 10;
122
123 int pow = 1;
125 for (int i = 0; i < n; i++) {
126 pow = pow * 10;
127
128 }
130 for (int i = 1; i <= k; i++) {
131 int y = (new Long (i * Y_LENGTH / (k + 1))).intValue();
132 g.setColor(FG_COLOR);
133 g.drawLine(cartesianXToGraphicsX( -3), cartesianYToGraphicsY(y)
134 , cartesianXToGraphicsX(xLength), cartesianYToGraphicsY(y));
135 g.setColor(TEXT_COLOR);
136 g.drawString("" + (i * pow), cartesianXToGraphicsX( -18 - n * 6)
137 , cartesianYToGraphicsY(y - 5));
138 }
139
140 g.setColor(GRAPHICS_FG_COLOR);
142 for (int i = 0; i < data.length; i++) {
143 int y = (new Long (data[i].longValue() * Y_LENGTH / ((k + 1) * pow))).intValue();
144 g.drawLine(cartesianXToGraphicsX(2 * i), cartesianYToGraphicsY(0)
145 , cartesianXToGraphicsX(2 * i), cartesianYToGraphicsY(y));
146 }
147
148 g.setColor(TEXT_COLOR);
149 g.drawString("History of memory used", cartesianXToGraphicsX(0)
150 , cartesianYToGraphicsY(Y_LENGTH + 20));
151 g.drawString("(Kbytes)", cartesianXToGraphicsX(0), cartesianYToGraphicsY(Y_LENGTH + 10));
152 g.drawString("0", cartesianXToGraphicsX( -12), cartesianYToGraphicsY( -5));
153 g.setColor(AXIS_COLOR);
154 g.drawLine(cartesianXToGraphicsX( -3), cartesianYToGraphicsY(0)
155 , cartesianXToGraphicsX(xLength), cartesianYToGraphicsY(0));
156 g.drawLine(cartesianXToGraphicsX( -1), cartesianYToGraphicsY(0), cartesianXToGraphicsX( -1)
157 , cartesianYToGraphicsY(Y_LENGTH));
158 g.drawLine(cartesianXToGraphicsX(xLength - 2), cartesianYToGraphicsY(0)
159 , cartesianXToGraphicsX(xLength - 2), cartesianYToGraphicsY(Y_LENGTH));
160
161
163 int xGauge = LEFT_MARGIN + xLength + HORIZONTAL_SPACE;
164
165 g.setColor(GRAPHICS_BG_COLOR);
166 g.fillRect(xGauge, cartesianYToGraphicsY(Y_LENGTH), GAUGE_WIDTH, Y_LENGTH);
167
168 long usedMemory = ((Long ) JonasManagementRepr.getAttribute(J2eeObjectName.J2EEServer(oWhere.
169 getCurrentDomainName(), oWhere.getCurrentJonasServerName())
170 , "currentUsedMemory")).longValue();
171 long totalMemory = ((Long ) JonasManagementRepr.getAttribute(J2eeObjectName.J2EEServer(
172 oWhere.getCurrentDomainName(), oWhere.getCurrentJonasServerName())
173 , "currentTotalMemory")).longValue();
174
175 g.setColor(GRAPHICS_FG_COLOR);
176 int y = (new Long (usedMemory * Y_LENGTH / totalMemory)).intValue();
177 g.fillRect(xGauge, cartesianYToGraphicsY(y), GAUGE_WIDTH, y);
178
179 g.setColor(AXIS_COLOR);
180 g.drawRect(xGauge, cartesianYToGraphicsY(Y_LENGTH), GAUGE_WIDTH, Y_LENGTH);
181
182 g.setColor(TEXT_COLOR);
183 g.drawString("0", xGauge + GAUGE_WIDTH + 3, cartesianYToGraphicsY( -5));
184 g.drawString("" + usedMemory, xGauge + GAUGE_WIDTH + 3
185 , cartesianYToGraphicsY(Math.min(y - 5, Y_LENGTH - 25)));
186 g.drawString("(current)", xGauge + GAUGE_WIDTH + 3, cartesianYToGraphicsY(Math.min(y - 15
187 , Y_LENGTH - 35)));
188 g.drawString("" + totalMemory, xGauge + GAUGE_WIDTH + 3, cartesianYToGraphicsY(Y_LENGTH - 5));
189 g.drawString("(total)", xGauge + GAUGE_WIDTH + 3, cartesianYToGraphicsY(Y_LENGTH - 15));
190 g.drawString("Memory used", xGauge, cartesianYToGraphicsY(Y_LENGTH + 20));
191 g.drawString("(Kbytes)", xGauge, cartesianYToGraphicsY(Y_LENGTH + 10));
192
193 GifEncoder ge = new GifEncoder(img, out);
194 ge.setDimensions(width, HEIGHT);
195 ge.encode();
196 out.close();
197 }
198
199
203 public static int getWidth(int length) {
204 return LEFT_MARGIN + 2 * length + HORIZONTAL_SPACE + GAUGE_WIDTH + RIGHT_MARGIN;
205 }
206
207
210 public static int getHeight() {
211 return HEIGHT;
212 }
213
214 private int cartesianXToGraphicsX(int x) {
215 return x + LEFT_MARGIN;
216 }
217
218 private int cartesianYToGraphicsY(int y) {
219 return HEIGHT - 1 - y - BOTTOM_MARGIN;
220 }
221 }
222 |
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