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19 package org.eclipse.jetty.server.handler;
20
21 import java.io.IOException;
22 import java.util.concurrent.Future;
23 import java.util.concurrent.TimeoutException;
24 import java.util.concurrent.atomic.AtomicInteger;
25 import java.util.concurrent.atomic.AtomicLong;
26 import java.util.concurrent.atomic.AtomicReference;
27
28 import javax.servlet.AsyncEvent;
29 import javax.servlet.AsyncListener;
30 import javax.servlet.ServletException;
31 import javax.servlet.http.HttpServletRequest;
32 import javax.servlet.http.HttpServletResponse;
33
34 import org.eclipse.jetty.server.AsyncContextEvent;
35 import org.eclipse.jetty.server.HttpChannelState;
36 import org.eclipse.jetty.server.Request;
37 import org.eclipse.jetty.server.Response;
38 import org.eclipse.jetty.util.FutureCallback;
39 import org.eclipse.jetty.util.annotation.ManagedAttribute;
40 import org.eclipse.jetty.util.annotation.ManagedObject;
41 import org.eclipse.jetty.util.annotation.ManagedOperation;
42 import org.eclipse.jetty.util.component.Graceful;
43 import org.eclipse.jetty.util.statistic.CounterStatistic;
44 import org.eclipse.jetty.util.statistic.SampleStatistic;
45
46 @ManagedObject("Request Statistics Gathering")
47 public class StatisticsHandler extends HandlerWrapper implements Graceful
48 {
49 private final AtomicLong _statsStartedAt = new AtomicLong();
50
51 private final CounterStatistic _requestStats = new CounterStatistic();
52 private final SampleStatistic _requestTimeStats = new SampleStatistic();
53 private final CounterStatistic _dispatchedStats = new CounterStatistic();
54 private final SampleStatistic _dispatchedTimeStats = new SampleStatistic();
55 private final CounterStatistic _asyncWaitStats = new CounterStatistic();
56
57 private final AtomicInteger _asyncDispatches = new AtomicInteger();
58 private final AtomicInteger _expires = new AtomicInteger();
59
60 private final AtomicInteger _responses1xx = new AtomicInteger();
61 private final AtomicInteger _responses2xx = new AtomicInteger();
62 private final AtomicInteger _responses3xx = new AtomicInteger();
63 private final AtomicInteger _responses4xx = new AtomicInteger();
64 private final AtomicInteger _responses5xx = new AtomicInteger();
65 private final AtomicLong _responsesTotalBytes = new AtomicLong();
66
67 private final AtomicReference<FutureCallback> _shutdown=new AtomicReference<>();
68
69 private final AsyncListener _onCompletion = new AsyncListener()
70 {
71 @Override
72 public void onTimeout(AsyncEvent event) throws IOException
73 {
74 _expires.incrementAndGet();
75 }
76
77 @Override
78 public void onStartAsync(AsyncEvent event) throws IOException
79 {
80 event.getAsyncContext().addListener(this);
81 }
82
83 @Override
84 public void onError(AsyncEvent event) throws IOException
85 {
86 }
87
88 @Override
89 public void onComplete(AsyncEvent event) throws IOException
90 {
91 HttpChannelState state = ((AsyncContextEvent)event).getHttpChannelState();
92
93 Request request = state.getBaseRequest();
94 final long elapsed = System.currentTimeMillis()-request.getTimeStamp();
95
96 long d=_requestStats.decrement();
97 _requestTimeStats.set(elapsed);
98
99 updateResponse(request);
100
101 _asyncWaitStats.decrement();
102
103
104 if (d==0)
105 {
106 FutureCallback shutdown = _shutdown.get();
107 if (shutdown!=null)
108 shutdown.succeeded();
109 }
110 }
111 };
112
113
114
115
116 @ManagedOperation(value="resets statistics", impact="ACTION")
117 public void statsReset()
118 {
119 _statsStartedAt.set(System.currentTimeMillis());
120
121 _requestStats.reset();
122 _requestTimeStats.reset();
123 _dispatchedStats.reset();
124 _dispatchedTimeStats.reset();
125 _asyncWaitStats.reset();
126
127 _asyncDispatches.set(0);
128 _expires.set(0);
129 _responses1xx.set(0);
130 _responses2xx.set(0);
131 _responses3xx.set(0);
132 _responses4xx.set(0);
133 _responses5xx.set(0);
134 _responsesTotalBytes.set(0L);
135 }
136
137 @Override
138 public void handle(String path, Request request, HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws IOException, ServletException
139 {
140 _dispatchedStats.increment();
141
142 final long start;
143 HttpChannelState state = request.getHttpChannelState();
144 if (state.isInitial())
145 {
146
147 _requestStats.increment();
148 start = request.getTimeStamp();
149 }
150 else
151 {
152
153 start = System.currentTimeMillis();
154 _asyncDispatches.incrementAndGet();
155 }
156
157 try
158 {
159 super.handle(path, request, httpRequest, httpResponse);
160 }
161 finally
162 {
163 final long now = System.currentTimeMillis();
164 final long dispatched=now-start;
165
166 _dispatchedStats.decrement();
167 _dispatchedTimeStats.set(dispatched);
168
169 if (state.isSuspended())
170 {
171 if (state.isInitial())
172 {
173 state.addListener(_onCompletion);
174 _asyncWaitStats.increment();
175 }
176 }
177 else if (state.isInitial())
178 {
179 long d=_requestStats.decrement();
180 _requestTimeStats.set(dispatched);
181 updateResponse(request);
182
183
184 FutureCallback shutdown = _shutdown.get();
185 if (shutdown!=null)
186 {
187 httpResponse.flushBuffer();
188 if (d==0)
189 shutdown.succeeded();
190 }
191 }
192
193 }
194 }
195
196 private void updateResponse(Request request)
197 {
198 Response response = request.getResponse();
199 switch (response.getStatus() / 100)
200 {
201 case 0:
202 if (request.isHandled())
203 _responses2xx.incrementAndGet();
204 else
205 _responses4xx.incrementAndGet();
206 break;
207 case 1:
208 _responses1xx.incrementAndGet();
209 break;
210 case 2:
211 _responses2xx.incrementAndGet();
212 break;
213 case 3:
214 _responses3xx.incrementAndGet();
215 break;
216 case 4:
217 _responses4xx.incrementAndGet();
218 break;
219 case 5:
220 _responses5xx.incrementAndGet();
221 break;
222 default:
223 break;
224 }
225 _responsesTotalBytes.addAndGet(response.getContentCount());
226 }
227
228 @Override
229 protected void doStart() throws Exception
230 {
231 _shutdown.set(null);
232 super.doStart();
233 statsReset();
234 }
235
236
237 @Override
238 protected void doStop() throws Exception
239 {
240 super.doStop();
241 FutureCallback shutdown = _shutdown.get();
242 if (shutdown!=null && !shutdown.isDone())
243 shutdown.failed(new TimeoutException());
244 }
245
246
247
248
249
250
251
252 @ManagedAttribute("number of requests")
253 public int getRequests()
254 {
255 return (int)_requestStats.getTotal();
256 }
257
258
259
260
261
262 @ManagedAttribute("number of requests currently active")
263 public int getRequestsActive()
264 {
265 return (int)_requestStats.getCurrent();
266 }
267
268
269
270
271
272 @ManagedAttribute("maximum number of active requests")
273 public int getRequestsActiveMax()
274 {
275 return (int)_requestStats.getMax();
276 }
277
278
279
280
281
282 @ManagedAttribute("maximum time spend handling requests (in ms)")
283 public long getRequestTimeMax()
284 {
285 return _requestTimeStats.getMax();
286 }
287
288
289
290
291
292 @ManagedAttribute("total time spend in all request handling (in ms)")
293 public long getRequestTimeTotal()
294 {
295 return _requestTimeStats.getTotal();
296 }
297
298
299
300
301
302
303
304 @ManagedAttribute("mean time spent handling requests (in ms)")
305 public double getRequestTimeMean()
306 {
307 return _requestTimeStats.getMean();
308 }
309
310
311
312
313
314
315
316 @ManagedAttribute("standard deviation for request handling (in ms)")
317 public double getRequestTimeStdDev()
318 {
319 return _requestTimeStats.getStdDev();
320 }
321
322
323
324
325
326
327 @ManagedAttribute("number of dispatches")
328 public int getDispatched()
329 {
330 return (int)_dispatchedStats.getTotal();
331 }
332
333
334
335
336
337
338 @ManagedAttribute("number of dispatches currently active")
339 public int getDispatchedActive()
340 {
341 return (int)_dispatchedStats.getCurrent();
342 }
343
344
345
346
347
348
349 @ManagedAttribute("maximum number of active dispatches being handled")
350 public int getDispatchedActiveMax()
351 {
352 return (int)_dispatchedStats.getMax();
353 }
354
355
356
357
358
359 @ManagedAttribute("maximum time spend in dispatch handling")
360 public long getDispatchedTimeMax()
361 {
362 return _dispatchedTimeStats.getMax();
363 }
364
365
366
367
368
369 @ManagedAttribute("total time spent in dispatch handling (in ms)")
370 public long getDispatchedTimeTotal()
371 {
372 return _dispatchedTimeStats.getTotal();
373 }
374
375
376
377
378
379
380
381 @ManagedAttribute("mean time spent in dispatch handling (in ms)")
382 public double getDispatchedTimeMean()
383 {
384 return _dispatchedTimeStats.getMean();
385 }
386
387
388
389
390
391
392
393 @ManagedAttribute("standard deviation for dispatch handling (in ms)")
394 public double getDispatchedTimeStdDev()
395 {
396 return _dispatchedTimeStats.getStdDev();
397 }
398
399
400
401
402
403
404
405 @ManagedAttribute("total number of async requests")
406 public int getAsyncRequests()
407 {
408 return (int)_asyncWaitStats.getTotal();
409 }
410
411
412
413
414
415 @ManagedAttribute("currently waiting async requests")
416 public int getAsyncRequestsWaiting()
417 {
418 return (int)_asyncWaitStats.getCurrent();
419 }
420
421
422
423
424
425 @ManagedAttribute("maximum number of waiting async requests")
426 public int getAsyncRequestsWaitingMax()
427 {
428 return (int)_asyncWaitStats.getMax();
429 }
430
431
432
433
434 @ManagedAttribute("number of requested that have been asynchronously dispatched")
435 public int getAsyncDispatches()
436 {
437 return _asyncDispatches.get();
438 }
439
440
441
442
443
444 @ManagedAttribute("number of async requests requests that have expired")
445 public int getExpires()
446 {
447 return _expires.get();
448 }
449
450
451
452
453
454 @ManagedAttribute("number of requests with 1xx response status")
455 public int getResponses1xx()
456 {
457 return _responses1xx.get();
458 }
459
460
461
462
463
464 @ManagedAttribute("number of requests with 2xx response status")
465 public int getResponses2xx()
466 {
467 return _responses2xx.get();
468 }
469
470
471
472
473
474 @ManagedAttribute("number of requests with 3xx response status")
475 public int getResponses3xx()
476 {
477 return _responses3xx.get();
478 }
479
480
481
482
483
484 @ManagedAttribute("number of requests with 4xx response status")
485 public int getResponses4xx()
486 {
487 return _responses4xx.get();
488 }
489
490
491
492
493
494 @ManagedAttribute("number of requests with 5xx response status")
495 public int getResponses5xx()
496 {
497 return _responses5xx.get();
498 }
499
500
501
502
503 @ManagedAttribute("time in milliseconds stats have been collected for")
504 public long getStatsOnMs()
505 {
506 return System.currentTimeMillis() - _statsStartedAt.get();
507 }
508
509
510
511
512 @ManagedAttribute("total number of bytes across all responses")
513 public long getResponsesBytesTotal()
514 {
515 return _responsesTotalBytes.get();
516 }
517
518 public String toStatsHTML()
519 {
520 StringBuilder sb = new StringBuilder();
521
522 sb.append("<h1>Statistics:</h1>\n");
523 sb.append("Statistics gathering started ").append(getStatsOnMs()).append("ms ago").append("<br />\n");
524
525 sb.append("<h2>Requests:</h2>\n");
526 sb.append("Total requests: ").append(getRequests()).append("<br />\n");
527 sb.append("Active requests: ").append(getRequestsActive()).append("<br />\n");
528 sb.append("Max active requests: ").append(getRequestsActiveMax()).append("<br />\n");
529 sb.append("Total requests time: ").append(getRequestTimeTotal()).append("<br />\n");
530 sb.append("Mean request time: ").append(getRequestTimeMean()).append("<br />\n");
531 sb.append("Max request time: ").append(getRequestTimeMax()).append("<br />\n");
532 sb.append("Request time standard deviation: ").append(getRequestTimeStdDev()).append("<br />\n");
533
534
535 sb.append("<h2>Dispatches:</h2>\n");
536 sb.append("Total dispatched: ").append(getDispatched()).append("<br />\n");
537 sb.append("Active dispatched: ").append(getDispatchedActive()).append("<br />\n");
538 sb.append("Max active dispatched: ").append(getDispatchedActiveMax()).append("<br />\n");
539 sb.append("Total dispatched time: ").append(getDispatchedTimeTotal()).append("<br />\n");
540 sb.append("Mean dispatched time: ").append(getDispatchedTimeMean()).append("<br />\n");
541 sb.append("Max dispatched time: ").append(getDispatchedTimeMax()).append("<br />\n");
542 sb.append("Dispatched time standard deviation: ").append(getDispatchedTimeStdDev()).append("<br />\n");
543
544
545 sb.append("Total requests suspended: ").append(getAsyncRequests()).append("<br />\n");
546 sb.append("Total requests expired: ").append(getExpires()).append("<br />\n");
547 sb.append("Total requests resumed: ").append(getAsyncDispatches()).append("<br />\n");
548
549 sb.append("<h2>Responses:</h2>\n");
550 sb.append("1xx responses: ").append(getResponses1xx()).append("<br />\n");
551 sb.append("2xx responses: ").append(getResponses2xx()).append("<br />\n");
552 sb.append("3xx responses: ").append(getResponses3xx()).append("<br />\n");
553 sb.append("4xx responses: ").append(getResponses4xx()).append("<br />\n");
554 sb.append("5xx responses: ").append(getResponses5xx()).append("<br />\n");
555 sb.append("Bytes sent total: ").append(getResponsesBytesTotal()).append("<br />\n");
556
557 return sb.toString();
558
559 }
560
561 @Override
562 public Future<Void> shutdown()
563 {
564 FutureCallback shutdown=new FutureCallback(false);
565 _shutdown.compareAndSet(null,shutdown);
566 shutdown=_shutdown.get();
567 if (_dispatchedStats.getCurrent()==0)
568 shutdown.succeeded();
569 return shutdown;
570 }
571 }