Source Code Cross Referenced for MemoryPanel.java in  » Database-Client » squirrel-sql-2.6.5a » net » sourceforge » squirrel_sql » client » gui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » squirrel sql 2.6.5a » net.sourceforge.squirrel_sql.client.gui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package net.sourceforge.squirrel_sql.client.gui;
002:
003:        /*
004:         * Copyright (C) 2001-2003 Gerd Wagner
005:         *
006:         * This library is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU Lesser General Public
008:         * License as published by the Free Software Foundation; either
009:         * version 2.1 of the License, or (at your option) any later version.
010:         *
011:         * This library is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         * Lesser General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU Lesser General Public
017:         * License along with this library; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         */
020:        import net.sourceforge.squirrel_sql.fw.id.IIdentifier;
021:        import net.sourceforge.squirrel_sql.fw.util.StringManager;
022:        import net.sourceforge.squirrel_sql.fw.util.StringManagerFactory;
023:        import net.sourceforge.squirrel_sql.fw.gui.ErrorDialog;
024:        import net.sourceforge.squirrel_sql.client.IApplication;
025:        import net.sourceforge.squirrel_sql.client.session.event.SessionEvent;
026:        import net.sourceforge.squirrel_sql.client.session.event.SessionAdapter;
027:        import net.sourceforge.squirrel_sql.client.resources.SquirrelResources;
028:
029:        import java.awt.*;
030:        import java.awt.event.ActionEvent;
031:        import java.awt.event.ActionListener;
032:        import java.util.*;
033:        import java.text.DateFormat;
034:
035:        import javax.swing.*;
036:        import javax.swing.Timer;
037:
038:        public class MemoryPanel extends JPanel {
039:            private static final long serialVersionUID = 1L;
040:
041:            /** Internationalized strings for this class. */
042:            private static final StringManager s_stringMgr = StringManagerFactory
043:                    .getStringManager(MemoryPanel.class);
044:
045:            private JProgressBar _bar;
046:            private JButton _btnGarbage;
047:            private JButton _btnSessionGCStatus;
048:            transient private IApplication _app;
049:            private HashMap<IIdentifier, MemorySessionInfo> _sessionInfosBySessionIDs = new HashMap<IIdentifier, MemorySessionInfo>();
050:
051:            public MemoryPanel(IApplication app) {
052:                _app = app;
053:
054:                _bar = new JProgressBar();
055:
056:                _bar.setStringPainted(true);
057:
058:                _btnGarbage = new JButton();
059:                // i18n[MemoryPanel.runGC=Run garbage collection]
060:                _btnGarbage.setToolTipText(s_stringMgr
061:                        .getString("MemoryPanel.runGC"));
062:                _btnGarbage.setBorder(null);
063:
064:                ImageIcon trashIcon = _app.getResources().getIcon(
065:                        SquirrelResources.IImageNames.TRASH);
066:                _btnGarbage.setIcon(trashIcon);
067:
068:                Dimension prefButtonSize = new Dimension(trashIcon
069:                        .getIconWidth(), trashIcon.getIconHeight());
070:
071:                _btnGarbage.setPreferredSize(prefButtonSize);
072:
073:                _btnGarbage.addActionListener(new ActionListener() {
074:                    public void actionPerformed(ActionEvent e) {
075:                        System.gc();
076:                    }
077:                });
078:
079:                _btnSessionGCStatus = new JButton() {
080:                    private static final long serialVersionUID = 1L;
081:
082:                    public void paint(Graphics g) {
083:                        super .paint(g);
084:                        //				paintNumWaitingGC(g);
085:                    }
086:                };
087:
088:                _btnSessionGCStatus.setBorder(null);
089:
090:                updateGcStatus();
091:
092:                _btnSessionGCStatus.setBorder(null);
093:                _btnSessionGCStatus.setPreferredSize(prefButtonSize);
094:
095:                _btnSessionGCStatus.addActionListener(new ActionListener() {
096:                    public void actionPerformed(ActionEvent e) {
097:                        showSessionGCStatus();
098:                    }
099:                });
100:
101:                JPanel pnlButtons = new JPanel(new GridLayout(1, 2, 3, 0));
102:                pnlButtons.add(_btnSessionGCStatus);
103:                pnlButtons.add(_btnGarbage);
104:
105:                this .setLayout(new BorderLayout(5, 0));
106:                this .add(pnlButtons, BorderLayout.EAST);
107:                this .add(_bar, BorderLayout.CENTER);
108:
109:                this .setBorder(null);
110:
111:                _app.getSessionManager().addSessionListener(
112:                        new SessionAdapter() {
113:                            public void sessionClosed(SessionEvent evt) {
114:                                IIdentifier id = evt.getSession()
115:                                        .getIdentifier();
116:                                MemorySessionInfo msi = _sessionInfosBySessionIDs
117:                                        .get(id);
118:                                if (null == msi) {
119:                                    throw new IllegalStateException(
120:                                            "A session with ID " + id
121:                                                    + " has not been created");
122:                                }
123:                                msi.closed = new Date();
124:                                updateGcStatus();
125:                            }
126:
127:                            public void sessionConnected(SessionEvent evt) {
128:                                IIdentifier id = evt.getSession()
129:                                        .getIdentifier();
130:                                if (null != _sessionInfosBySessionIDs.get(id)) {
131:                                    throw new IllegalStateException(
132:                                            "A session with ID "
133:                                                    + id
134:                                                    + " has already been created");
135:                                }
136:                                MemorySessionInfo msi = new MemorySessionInfo(
137:                                        id, evt.getSession().getAlias()
138:                                                .getName());
139:                                _sessionInfosBySessionIDs.put(id, msi);
140:
141:                            }
142:
143:                            public void sessionFinalized(IIdentifier sessionId) {
144:                                MemorySessionInfo msi = _sessionInfosBySessionIDs
145:                                        .get(sessionId);
146:                                if (null == msi) {
147:                                    throw new IllegalStateException(
148:                                            "A session with ID " + sessionId
149:                                                    + " has not been created");
150:                                }
151:                                msi.finalized = new Date();
152:                                updateGcStatus();
153:                            }
154:                        });
155:
156:                Timer t = new Timer(500, new ActionListener() {
157:                    public void actionPerformed(ActionEvent e) {
158:                        updateLabel();
159:                    }
160:                });
161:                t.start();
162:            }
163:
164:            private void updateGcStatus() {
165:                SessionGCStatus gcStat = getSessionGCStatus();
166:                _btnSessionGCStatus.setToolTipText(gcStat.tooltip);
167:                _btnSessionGCStatus.setBackground(gcStat.color);
168:                _btnSessionGCStatus.setText(gcStat.numSessAwaitingGC);
169:            }
170:
171:            private SessionGCStatus getSessionGCStatus() {
172:                SessionGCStatus ret = new SessionGCStatus();
173:
174:                int numSessAwaitingGC = 0;
175:                for (Iterator<MemorySessionInfo> i = _sessionInfosBySessionIDs
176:                        .values().iterator(); i.hasNext();) {
177:                    MemorySessionInfo msi = i.next();
178:                    if (null != msi.closed && null == msi.finalized) {
179:                        ++numSessAwaitingGC;
180:                    }
181:                }
182:
183:                ret.numSessAwaitingGC = "" + numSessAwaitingGC;
184:
185:                // i18n [MemoryPanel.gcStatusToolTip={0} Sessions waiting for garbage collection]
186:                ret.tooltip = s_stringMgr.getString(
187:                        "MemoryPanel.gcStatusToolTip", new Integer(
188:                                ret.numSessAwaitingGC));
189:
190:                ret.color = Color.yellow;
191:                if (numSessAwaitingGC < 2) {
192:                    ret.color = Color.green;
193:                } else if (numSessAwaitingGC > 4) {
194:                    ret.color = Color.red;
195:                }
196:
197:                return ret;
198:
199:            }
200:
201:            private void updateLabel() {
202:                long total = Runtime.getRuntime().totalMemory() >> 10 >> 10;
203:                long free = Runtime.getRuntime().freeMemory() >> 10 >> 10;
204:                long just = total - free;
205:
206:                _bar.setMinimum(0);
207:                _bar.setMaximum((int) total);
208:                _bar.setValue((int) just);
209:
210:                Object[] params = new Long[] { Long.valueOf(just),
211:                        Long.valueOf(total) };
212:
213:                // i18n[MemoryPanel.memSize={0} of {1} MB];
214:                String msg = s_stringMgr.getString("MemoryPanel.memSize",
215:                        params);
216:                _bar.setString(msg);
217:            }
218:
219:            private void showSessionGCStatus() {
220:                StringBuffer[] params = new StringBuffer[] {
221:                        new StringBuffer(getSessionGCStatus().tooltip),
222:                        new StringBuffer(), new StringBuffer(),
223:                        new StringBuffer() };
224:
225:                MemorySessionInfo[] msis = _sessionInfosBySessionIDs.values()
226:                        .toArray(new MemorySessionInfo[0]);
227:
228:                Arrays.sort(msis);
229:
230:                for (int i = 0; i < msis.length; i++) {
231:                    if (null != msis[i].closed && null == msis[i].finalized) {
232:                        params[1].append(msis[i].toString()).append('\n');
233:                    } else if (null == msis[i].closed) {
234:                        params[2].append(msis[i].toString()).append('\n');
235:                    } else if (null != msis[i].finalized) {
236:                        params[3].append(msis[i].toString()).append('\n');
237:                    }
238:                }
239:
240:                // i18n [MemoryPanel.gcStatus={0}\n\n
241:                //Sessions waiting for garbage collection:\n
242:                //==================================================\n
243:                //{1}\n
244:                //Sessions open:\n
245:                //==================================================\n
246:                //{2}\n
247:                //Sessions garbage collected:\n
248:                //==================================================\n
249:                //{3}\n]
250:                String msg = s_stringMgr.getString("MemoryPanel.gcStatus",
251:                        (Object[]) params);
252:                ErrorDialog errorDialog = new ErrorDialog(_app.getMainFrame(),
253:                        msg);
254:
255:                // i18n[MemoryPanel.statusDialogTitle=Session garbage collection status]
256:                errorDialog.setTitle(s_stringMgr
257:                        .getString("MemoryPanel.statusDialogTitle"));
258:                errorDialog.setVisible(true);
259:            }
260:
261:            private static class MemorySessionInfo implements 
262:                    Comparable<MemorySessionInfo> {
263:                MemorySessionInfo(IIdentifier sessionId, String aliasName) {
264:                    this .sessionId = sessionId;
265:                    this .aliasName = aliasName;
266:                }
267:
268:                IIdentifier sessionId;
269:                String aliasName;
270:                java.util.Date created = new Date();
271:                java.util.Date closed;
272:                java.util.Date finalized;
273:
274:                public String toString() {
275:                    DateFormat df = DateFormat.getInstance();
276:
277:                    Object[] params = new Object[] { sessionId, aliasName,
278:                            df.format(created),
279:                            null == closed ? "" : df.format(closed),
280:                            null == finalized ? "" : df.format(finalized) };
281:
282:                    if (null != closed && null == finalized) {
283:                        // i18n[MemoryPanel.sessionInfo.toString1=Session: ID={0}, Alias={1}: created at {2}, closed at {3}]
284:                        return s_stringMgr.getString(
285:                                "MemoryPanel.sessionInfo.toString1", params);
286:                    } else if (null == closed) {
287:                        // i18n[MemoryPanel.sessionInfo.toString2=Session: ID={0}, Alias={1}: created at {2}]
288:                        return s_stringMgr.getString(
289:                                "MemoryPanel.sessionInfo.toString2", params);
290:                    } else if (null != finalized) {
291:                        // i18n[MemoryPanel.sessionInfo.toString3=Session: ID={0}, Alias={1}: created at {2}, closed at {3}, finalized at {4}]
292:                        return s_stringMgr.getString(
293:                                "MemoryPanel.sessionInfo.toString3", params);
294:                    } else {
295:                        throw new IllegalStateException("Unknown Session state");
296:                    }
297:                }
298:
299:                public int compareTo(MemorySessionInfo other) {
300:                    return Integer.valueOf(sessionId.toString()).compareTo(
301:                            Integer.valueOf(other.sessionId.toString()));
302:                }
303:
304:                /**
305:                 * @see java.lang.Object#hashCode()
306:                 */
307:                @Override
308:                public int hashCode() {
309:                    final int prime = 31;
310:                    int result = 1;
311:                    result = prime * result
312:                            + ((sessionId == null) ? 0 : sessionId.hashCode());
313:                    return result;
314:                }
315:
316:                /**
317:                 * @see java.lang.Object#equals(java.lang.Object)
318:                 */
319:                @Override
320:                public boolean equals(Object obj) {
321:                    if (this  == obj)
322:                        return true;
323:                    if (obj == null)
324:                        return false;
325:                    if (getClass() != obj.getClass())
326:                        return false;
327:                    final MemorySessionInfo other = (MemorySessionInfo) obj;
328:                    if (sessionId == null) {
329:                        if (other.sessionId != null)
330:                            return false;
331:                    } else if (!sessionId.equals(other.sessionId))
332:                        return false;
333:                    return true;
334:                }
335:
336:            }
337:
338:            private static class SessionGCStatus {
339:                String tooltip;
340:                Color color;
341:                String numSessAwaitingGC;
342:            }
343:
344:        }
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