Source Code Cross Referenced for DefaultMonitor.java in  » Profiler » JMeasurement » de » mcs » jmeasurement » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Profiler » JMeasurement » de.mcs.jmeasurement 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * MCS Media Computer Software Copyright (c) 2005 by MCS
003:         * -------------------------------------- Created on 23.04.2005 by w.klaas
004:         * 
005:         * Licensed under the Apache License, Version 2.0 (the "License"); you may not
006:         * use this file except in compliance with the License. You may obtain a copy of
007:         * the License at
008:         * 
009:         * http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
013:         * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
014:         * License for the specific language governing permissions and limitations under
015:         * the License.
016:         */
017:        package de.mcs.jmeasurement;
018:
019:        import java.text.SimpleDateFormat;
020:        import java.util.Date;
021:
022:        import de.mcs.utils.StringFormat;
023:
024:        /**
025:         * This is the default implementation of the monitor class. Here all measurement
026:         * will be done. This monitor is not thread safe. Threadsafty will be
027:         * implemented thru the monitorFactory and the MeasurePoint class
028:         * implementation.
029:         * 
030:         * @author w.klaas
031:         */
032:        public class DefaultMonitor implements  Monitor {
033:
034:            /** time when the monitor starts measurement. */
035:            private long startTime;
036:
037:            /** time when the monitor starts measurement. */
038:            private long pauseTime;
039:
040:            /** measurement is actually running. */
041:            private boolean running;
042:
043:            /** measurement is actually paused. */
044:            private boolean paused;
045:
046:            /** time elapsed since last measuremtent. */
047:            private long accrued;
048:
049:            /** the parent MEasurePoint (for call back functions). */
050:            private MeasurePoint point;
051:
052:            /** id of this monitor. */
053:            private String monitorId;
054:
055:            /** this monitor has recorded an exception. */
056:            private boolean isException;
057:
058:            /** the text of the exception. */
059:            private String exceptionText;
060:
061:            /**
062:             * This is the default constructor.
063:             */
064:            public DefaultMonitor() {
065:                reset();
066:                point = null;
067:                monitorId = "";
068:            }
069:
070:            /**
071:             * This is the default constructor.
072:             * 
073:             * @param aPoint
074:             *            the measure point (for callback functions)
075:             */
076:            public DefaultMonitor(final MeasurePoint aPoint) {
077:                this ();
078:                point = aPoint;
079:            }
080:
081:            /**
082:             * This is the default constructor.
083:             * 
084:             * @param aPoint
085:             *            the measure point (for callback functions)
086:             * @param aMonitorId
087:             *            id of this monitor
088:             */
089:            public DefaultMonitor(final MeasurePoint aPoint,
090:                    final String aMonitorId) {
091:                this (aPoint);
092:                monitorId = aMonitorId;
093:            }
094:
095:            /**
096:             * This is the default constructor.
097:             * 
098:             * @param aMonitorId
099:             *            id of this monitor
100:             */
101:            public DefaultMonitor(final String aMonitorId) {
102:                this ();
103:                monitorId = aMonitorId;
104:            }
105:
106:            /**
107:             * starting the measurement of this monitor.
108:             * 
109:             * @return boolean <code>true</code> if the monitor could be startet,
110:             *         otherwise <code>false</code>
111:             * @see de.mcs.jmeasurement.Monitor#start()
112:             */
113:            public final boolean start() {
114:                startTime = System.currentTimeMillis();
115:                running = true;
116:                if (null != point) {
117:                    point.activateMonitor(this );
118:                }
119:                return true;
120:            }
121:
122:            /**
123:             * pausing the measurement.
124:             * 
125:             * @return boolean <code>true</code> if the monitor could be paused,
126:             *         otherwise <code>false</code>
127:             * @see de.mcs.jmeasurement.Monitor#pause()
128:             */
129:            public final boolean pause() {
130:                if (running) {
131:                    pauseTime = System.currentTimeMillis();
132:                    paused = true;
133:                    return true;
134:                } else {
135:                    return false;
136:                }
137:            }
138:
139:            /**
140:             * resume the measurement.
141:             * 
142:             * @return boolean <code>true</code> if the monitor could be resumed,
143:             *         otherwise <code>false</code>
144:             * @see de.mcs.jmeasurement.Monitor#resume()
145:             */
146:            public final boolean resume() {
147:                if (running) {
148:                    accrued += pauseTime - startTime;
149:                    startTime = System.currentTimeMillis();
150:                    paused = false;
151:                    return true;
152:                } else {
153:                    return false;
154:                }
155:            }
156:
157:            /**
158:             * @see de.mcs.jmeasurement.Monitor#increase(long)
159:             * @param msec
160:             *            time to increase
161:             */
162:            public final void increase(final long msec) {
163:                accrued += msec;
164:            }
165:
166:            /**
167:             * @see de.mcs.jmeasurement.Monitor#decrease(long)
168:             * @param msec
169:             *            time to decrease
170:             */
171:            public final void decrease(final long msec) {
172:                accrued -= msec;
173:            }
174:
175:            /**
176:             * stopping the measurment.
177:             * 
178:             * @return boolean <code>true</code> if the monitor could be stopped,
179:             *         otherwise <code>false</code>
180:             * @see de.mcs.jmeasurement.Monitor#stop()
181:             */
182:            public final boolean stop() {
183:                if (running) {
184:                    accrued = accrued + timeElapsed();
185:                    running = false;
186:                    if (null != point) {
187:                        point.processMonitor(this );
188:                    }
189:                    return true;
190:                } else {
191:                    return false;
192:                }
193:            }
194:
195:            /**
196:             * @return long the time elapsed since last call to start() or resume().
197:             */
198:            private long timeElapsed() {
199:                return System.currentTimeMillis() - startTime;
200:            }
201:
202:            /**
203:             * @return long getting the measured time.
204:             * @see de.mcs.jmeasurement.Monitor#getAccrued()
205:             */
206:            public final long getAccrued() {
207:                return accrued;
208:            }
209:
210:            /**
211:             * @see de.mcs.jmeasurement.Monitor#reset()
212:             */
213:            public final void reset() {
214:                accrued = 0;
215:                running = false;
216:                startTime = 0;
217:                isException = false;
218:            }
219:
220:            /**
221:             * @return boolean the monitor is actual running
222:             * @see de.mcs.jmeasurement.Monitor#isRunning()
223:             */
224:            public final boolean isRunning() {
225:                return running;
226:            }
227:
228:            /**
229:             * @return boolean the monitor is actual paused
230:             * @see de.mcs.jmeasurement.Monitor#isPaused()
231:             */
232:            public final boolean isPaused() {
233:                return paused;
234:            }
235:
236:            /**
237:             * This methode will be called if the garbage collector will be remove this
238:             * object. So we can use the callback to add a death object if the monitor
239:             * is still runnning.
240:             * 
241:             * @throws Throwable
242:             *             if something goes wrong
243:             * @see java.lang.Object#finalize()
244:             */
245:            protected final void finalize() throws Throwable {
246:                super .finalize();
247:                if (running) {
248:                    point.deathMonitor(this );
249:                }
250:            }
251:
252:            /**
253:             * @return the id of this monitor
254:             * @see de.mcs.jmeasurement.Monitor#getMonitoId()
255:             */
256:            public final String getMonitoId() {
257:                return monitorId;
258:            }
259:
260:            /**
261:             * @return the striong representation of this monitor.
262:             * @see java.lang.Object#toString()
263:             */
264:            public final String toString() {
265:                return getMonitoId() + ":" + getAccrued();
266:            }
267:
268:            /**
269:             * @return if this monitor has get an exception.
270:             * @see de.mcs.jmeasurement.Monitor#hasException()
271:             * @since 0.64
272:             */
273:            public final boolean hasException() {
274:                return isException;
275:            }
276:
277:            /**
278:             * @return the exception text.
279:             * @see de.mcs.jmeasurement.Monitor#getException()
280:             * @since 0.64
281:             */
282:            public final String getException() {
283:                return exceptionText;
284:            }
285:
286:            /**
287:             * @param text
288:             *            the text to set for the exception.
289:             * @see de.mcs.jmeasurement.Monitor#setException(String)
290:             * @since 0.64
291:             */
292:            public final void setException(final String text) {
293:                isException = true;
294:                exceptionText = text;
295:                stop();
296:            }
297:
298:            /**
299:             * @param throwable
300:             *            the exception to set.
301:             * @see de.mcs.jmeasurement.Monitor#setException(String)
302:             * @since 0.64
303:             */
304:            public final void setException(final Throwable throwable) {
305:                isException = true;
306:                SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
307:                switch (MeasureFactory.getExceptionHandling()) {
308:                case JMConfig.EXCEPTION_COUNT:
309:                    exceptionText = "";
310:                    break;
311:                case JMConfig.EXCEPTION_NAME:
312:                    exceptionText = simpleDateFormat.format(new Date()) + ':'
313:                            + throwable.toString();
314:                    break;
315:                case JMConfig.EXCEPTION_TRACE:
316:                    exceptionText = simpleDateFormat.format(new Date()) + ':'
317:                            + StringFormat.getStackTrace(throwable);
318:                    break;
319:
320:                default:
321:                    exceptionText = "";
322:                    break;
323:                }
324:                ;
325:                stop();
326:            }
327:        }
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