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5d10d135 ASL |
1 | /******************************************************************************* |
2 | * Copyright (c) 2009, 2010 Ericsson | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are | |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: | |
10 | * Alvaro Sanchez-Leon (alvsan09@gmail.com) - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | package org.eclipse.linuxtools.lttng.state.trace; | |
13 | ||
14 | import java.util.Collections; | |
15 | import java.util.HashMap; | |
16 | import java.util.Vector; | |
17 | ||
18 | import org.eclipse.linuxtools.lttng.TraceDebug; | |
19 | import org.eclipse.linuxtools.lttng.event.LttngEvent; | |
20 | import org.eclipse.linuxtools.lttng.event.LttngSyntheticEvent; | |
21 | import org.eclipse.linuxtools.lttng.event.LttngSyntheticEvent.SequenceInd; | |
22 | import org.eclipse.linuxtools.lttng.event.LttngTimestamp; | |
23 | import org.eclipse.linuxtools.lttng.model.LTTngTreeNode; | |
24 | import org.eclipse.linuxtools.lttng.request.ILttngSyntEventRequest; | |
25 | import org.eclipse.linuxtools.lttng.request.IRequestStatusListener; | |
26 | import org.eclipse.linuxtools.lttng.request.LttngSyntEventRequest; | |
27 | import org.eclipse.linuxtools.lttng.state.LttngStateException; | |
28 | import org.eclipse.linuxtools.lttng.state.evProcessor.ITransEventProcessor; | |
29 | import org.eclipse.linuxtools.lttng.state.evProcessor.state.StateEventToHandlerFactory; | |
30 | import org.eclipse.linuxtools.lttng.state.model.LttngTraceState; | |
31 | import org.eclipse.linuxtools.lttng.state.model.StateModelFactory; | |
32 | import org.eclipse.linuxtools.lttng.state.resource.ILttngStateContext; | |
33 | import org.eclipse.linuxtools.lttng.trace.LTTngTextTrace; | |
34 | import org.eclipse.linuxtools.lttng.trace.LTTngTrace; | |
5d10d135 ASL |
35 | import org.eclipse.linuxtools.tmf.event.TmfEvent; |
36 | import org.eclipse.linuxtools.tmf.event.TmfTimeRange; | |
37 | import org.eclipse.linuxtools.tmf.event.TmfTimestamp; | |
38 | import org.eclipse.linuxtools.tmf.experiment.TmfExperiment; | |
39 | import org.eclipse.linuxtools.tmf.request.TmfDataRequest; | |
5d10d135 ASL |
40 | import org.eclipse.linuxtools.tmf.trace.ITmfTrace; |
41 | import org.eclipse.linuxtools.tmf.trace.TmfCheckpoint; | |
42 | import org.eclipse.linuxtools.tmf.trace.TmfLocation; | |
43 | ||
550d787e | 44 | public class StateTraceManager extends LTTngTreeNode implements IStateTraceManager, ILttngStateContext { |
5d10d135 ASL |
45 | |
46 | // constants | |
47 | private static final long DEFAULT_OFFSET = 0L; | |
48 | private static final int DEFAULT_CHUNK = 1; | |
49 | ||
50 | // configurable check point interval | |
51 | private static final long LTTNG_CHECK_POINT_INTERVAL = 15000L; | |
52 | private long fcheckPointInterval = LTTNG_CHECK_POINT_INTERVAL; | |
53 | ||
54 | private TmfExperiment<LttngEvent> fExperiment = null; | |
55 | ||
56 | // immutable Objects | |
57 | private final ITmfTrace fTrace; | |
58 | private int fcpuNumber = -1; | |
59 | private final ITransEventProcessor fStateUpdateProcessor; | |
60 | ||
61 | // potentially thread shared | |
62 | private final HashMap<Long, LttngTraceState> stateCheckpointsList = new HashMap<Long, LttngTraceState>(); | |
63 | private final Vector<TmfCheckpoint> timestampCheckpointsList = new Vector<TmfCheckpoint>(); | |
64 | private LttngTraceState fStateModel; | |
550d787e | 65 | private LttngTraceState fCheckPointStateModel; |
5d10d135 ASL |
66 | |
67 | // locks | |
c1c69938 FC |
68 | private Object fCheckPointsLock = new Object(); |
69 | private Object fStateModelLock = new Object(); | |
5d10d135 | 70 | |
5d10d135 ASL |
71 | |
72 | ||
73 | // ======================================================================= | |
74 | // Constructor | |
75 | // ======================================================================= | |
76 | /** | |
77 | * @param id | |
78 | * @param parent | |
79 | * @param name | |
80 | * @param trace | |
5d10d135 ASL |
81 | * @throws LttngStateException |
82 | */ | |
550d787e | 83 | public StateTraceManager(Long id, LTTngTreeNode parent, String name, ITmfTrace trace) throws LttngStateException { |
5d10d135 ASL |
84 | super(id, parent, name, trace); |
85 | ||
86 | if (trace == null) { | |
87 | throw new LttngStateException("No TmfTrace object available!"); | |
88 | } | |
89 | ||
90 | fTrace = trace; | |
5d10d135 | 91 | fStateUpdateProcessor = StateEventToHandlerFactory.getInstance(); |
550d787e | 92 | |
5d10d135 | 93 | init(); |
550d787e FC |
94 | |
95 | fStateModel = StateModelFactory.getStateEntryInstance(this); | |
96 | fStateModel.init(this); | |
97 | ||
98 | fCheckPointStateModel = StateModelFactory.getStateEntryInstance(this); | |
99 | fCheckPointStateModel.init(this); | |
5d10d135 ASL |
100 | } |
101 | ||
102 | // ======================================================================= | |
103 | // Methods | |
104 | // ======================================================================= | |
105 | @SuppressWarnings("unchecked") | |
106 | private void init() { | |
107 | // resolve the experiment | |
108 | Object obj = getParent().getValue(); | |
109 | if (obj != null && obj instanceof TmfExperiment<?>) { | |
110 | fExperiment = (TmfExperiment<LttngEvent>) obj; | |
111 | } | |
112 | ||
113 | // initialize the number of cpus | |
114 | if (fTrace instanceof LTTngTrace) { | |
115 | fcpuNumber = ((LTTngTrace) fTrace).getCpuNumber(); | |
116 | } else if (fTrace instanceof LTTngTextTrace) { | |
117 | fcpuNumber = ((LTTngTextTrace) fTrace).getCpuNumber(); | |
118 | } | |
119 | } | |
550d787e | 120 | |
5d10d135 | 121 | |
8827c197 | 122 | |
8827c197 | 123 | |
5d10d135 ASL |
124 | |
125 | /* | |
126 | * (non-Javadoc) | |
127 | * | |
128 | * @see org.eclipse.linuxtools.lttng.state.IStateManager#getEventLog() | |
129 | */ | |
d4011df2 | 130 | @Override |
5d10d135 ASL |
131 | public ITmfTrace getTrace() { |
132 | return fTrace; | |
133 | } | |
134 | ||
135 | /** | |
136 | * Save a checkpoint if it is needed at that point | |
137 | * <p> | |
138 | * The function will use "eventCount" internally to determine if a save was | |
139 | * needed | |
140 | * | |
141 | * @param eventCounter | |
142 | * The event "count" or event "id" so far | |
143 | * @param eventTime | |
144 | * The timestamp of this event | |
145 | * | |
146 | * @return boolean True if a checkpoint was saved, false otherwise | |
147 | */ | |
550d787e | 148 | private void saveCheckPointIfNeeded(Long eventCounter, TmfTimestamp eventTime) { |
5d10d135 ASL |
149 | // Save a checkpoint every LTTNG_STATE_SAVE_INTERVAL event |
150 | if ((eventCounter.longValue() % fcheckPointInterval) == 0) { | |
c1c69938 | 151 | |
5d10d135 | 152 | LttngTraceState stateCheckPoint; |
c1c69938 | 153 | synchronized (fCheckPointsLock) { |
550d787e | 154 | stateCheckPoint = fCheckPointStateModel.clone(); |
5d10d135 ASL |
155 | } |
156 | ||
157 | TraceDebug.debug("Check point created here: " + eventCounter | |
158 | + " -> " + eventTime.toString() + "************" | |
159 | + getTrace().getName() + " >>>>> Thread: " | |
160 | + Thread.currentThread().getId()); | |
161 | ||
c1c69938 | 162 | synchronized (fCheckPointsLock) { |
5d10d135 ASL |
163 | // Save the checkpoint |
164 | stateCheckpointsList.put(eventCounter, stateCheckPoint); | |
165 | // Save correlation between timestamp and checkpoint index | |
166 | ||
550d787e FC |
167 | timestampCheckpointsList.add(new TmfCheckpoint(new TmfTimestamp(eventTime), new TmfLocation<Long>( |
168 | eventCounter))); | |
5d10d135 ASL |
169 | } |
170 | } | |
171 | } | |
172 | ||
173 | /** | |
174 | * @return the lttng_check_point_interval | |
175 | */ | |
176 | public long getCheckPointInterval() { | |
177 | return fcheckPointInterval; | |
178 | } | |
179 | ||
180 | /** | |
181 | * @param check_point_interval | |
182 | * , the lttng_check_point_interval to set | |
183 | */ | |
184 | public void setCheckPointInterval(long check_point_interval) { | |
185 | this.fcheckPointInterval = check_point_interval; | |
186 | } | |
187 | ||
736aecd5 ASL |
188 | /* |
189 | * (non-Javadoc) | |
190 | * | |
550d787e FC |
191 | * @see org.eclipse.linuxtools.lttng.state.trace.IStateTraceManager# |
192 | * restoreCheckPointByTimestamp | |
736aecd5 | 193 | * (org.eclipse.linuxtools.tmf.event.TmfTimestamp) |
5d10d135 | 194 | */ |
d4011df2 | 195 | @Override |
5d10d135 | 196 | @SuppressWarnings("unchecked") |
736aecd5 ASL |
197 | public TmfTimestamp restoreCheckPointByTimestamp(TmfTimestamp eventTime) { |
198 | TmfTimeRange experimentRange = fExperiment.getTimeRange(); | |
5d10d135 ASL |
199 | TmfTimestamp nearestTimeStamp = fTrace.getStartTime(); |
200 | ||
201 | // The GUI can have time limits higher than this log, since GUI can | |
202 | // handle multiple logs | |
550d787e | 203 | if ((eventTime.getValue() < 0) || (eventTime.getValue() > experimentRange.getEndTime().getValue())) { |
5d10d135 ASL |
204 | return null; |
205 | } | |
206 | ||
736aecd5 ASL |
207 | // The GUI can have time limits lower than this trace, since experiment |
208 | // can handle multiple traces | |
209 | if ((eventTime.getValue() < fTrace.getStartTime().getValue())) { | |
210 | eventTime = fTrace.getStartTime(); | |
5dbe4d3b | 211 | } |
736aecd5 | 212 | |
c1c69938 FC |
213 | LttngTraceState traceState; |
214 | synchronized (fCheckPointsLock) { | |
215 | Collections.sort(timestampCheckpointsList); | |
216 | // Initiate the compare with a checkpoint containing the target time | |
217 | // stamp to find | |
218 | int index = Collections.binarySearch(timestampCheckpointsList, new TmfCheckpoint(eventTime, | |
219 | new TmfLocation<Long>(0L))); | |
220 | // adjust index to round down to earlier checkpoint when exact match | |
221 | // not | |
222 | // found | |
223 | index = getPrevIndex(index); | |
224 | ||
225 | if (index == 0) { | |
226 | // No checkpoint restore is needed, start with a brand new | |
227 | // TraceState | |
228 | traceState = StateModelFactory.getStateEntryInstance(this); | |
229 | } else { | |
230 | ||
231 | // Useful CheckPoint found | |
232 | TmfCheckpoint checkpoint = timestampCheckpointsList.get(index); | |
233 | nearestTimeStamp = checkpoint.getTimestamp(); | |
234 | // get the location associated with the checkpoint | |
235 | TmfLocation<Long> location = (TmfLocation<Long>) checkpoint.getLocation(); | |
236 | // reference a new copy of the checkpoint template | |
237 | traceState = stateCheckpointsList.get(location.getLocation()).clone(); | |
238 | } | |
239 | ||
5dbe4d3b | 240 | } |
5d10d135 | 241 | |
5dbe4d3b | 242 | // Restore the stored traceState |
c1c69938 | 243 | synchronized (fStateModelLock) { |
5dbe4d3b | 244 | fStateModel = traceState; |
5d10d135 ASL |
245 | } |
246 | ||
247 | return nearestTimeStamp; | |
248 | } | |
249 | ||
250 | /** | |
251 | * Adjust the result from a binary search to the round down position | |
252 | * | |
253 | * @param position | |
254 | * if Negative is: (-(insertion point) -1) | |
255 | * @return position or if no match found, earlier than insertion point | |
256 | */ | |
257 | private int getPrevIndex(int position) { | |
258 | int roundDownPosition = position; | |
259 | if (position < 0) { | |
260 | roundDownPosition = -(position + 2); | |
261 | } | |
262 | ||
263 | roundDownPosition = roundDownPosition < 0 ? 0 : roundDownPosition; | |
264 | return roundDownPosition; | |
265 | } | |
266 | ||
5d10d135 ASL |
267 | // TODO: Remove this request type when the UI handle their own requests |
268 | /** | |
269 | * Request Event data of a specified time range | |
270 | * | |
271 | * @param timeWindow | |
272 | * @param listener | |
273 | * @param processor | |
274 | * @return ILttngEventRequest The request made | |
275 | */ | |
550d787e | 276 | ILttngSyntEventRequest getDataRequestByTimeRange(TmfTimeRange timeWindow, IRequestStatusListener listener, |
5d10d135 ASL |
277 | final ITransEventProcessor processor) { |
278 | ||
550d787e FC |
279 | ILttngSyntEventRequest request = new StateTraceManagerRequest(timeWindow, DEFAULT_OFFSET, |
280 | TmfDataRequest.ALL_DATA, DEFAULT_CHUNK, listener, getExperimentTimeWindow(), processor) { | |
5d10d135 ASL |
281 | }; |
282 | ||
283 | return request; | |
284 | } | |
285 | ||
5d10d135 ASL |
286 | |
287 | /* | |
288 | * (non-Javadoc) | |
289 | * | |
290 | * @see | |
291 | * org.eclipse.linuxtools.lttng.state.trace.IStateTraceManager#getStateModel | |
292 | * () | |
293 | */ | |
d4011df2 | 294 | @Override |
c1c69938 FC |
295 | public LttngTraceState getStateModel() { |
296 | LttngTraceState stateModel = null; | |
297 | synchronized (fStateModelLock) { | |
298 | stateModel = fStateModel; | |
5d10d135 | 299 | } |
c1c69938 | 300 | return stateModel; |
5d10d135 ASL |
301 | } |
302 | ||
550d787e FC |
303 | /* |
304 | * (non-Javadoc) | |
305 | * | |
306 | * @see org.eclipse.linuxtools.lttng.state.trace.IStateTraceManager# | |
307 | * getCheckPointStateModel() | |
308 | */ | |
d4011df2 | 309 | @Override |
c1c69938 FC |
310 | public LttngTraceState getCheckPointStateModel() { |
311 | LttngTraceState checkPointStateModel = null; | |
312 | synchronized (fCheckPointsLock) { | |
313 | checkPointStateModel = fCheckPointStateModel; | |
550d787e | 314 | } |
c1c69938 | 315 | return checkPointStateModel; |
550d787e FC |
316 | } |
317 | ||
5d10d135 ASL |
318 | /** |
319 | * @return the stateCheckpointsList | |
320 | */ | |
321 | HashMap<Long, LttngTraceState> getStateCheckpointsList() { | |
322 | return stateCheckpointsList; | |
323 | } | |
324 | ||
325 | /** | |
326 | * @return the timestampCheckpointsList | |
327 | */ | |
328 | Vector<TmfCheckpoint> getTimestampCheckpointsList() { | |
329 | return timestampCheckpointsList; | |
330 | } | |
331 | // ======================================================================= | |
332 | // Inner Class | |
333 | // ======================================================================= | |
334 | class StateTraceManagerRequest extends LttngSyntEventRequest { | |
335 | // ======================================================================= | |
336 | // Data | |
337 | // ======================================================================= | |
338 | final TmfEvent[] evt = new TmfEvent[1]; | |
339 | final ITransEventProcessor fprocessor; | |
340 | LttngSyntheticEvent synEvent; | |
341 | Long fCount = getSynEventCount(); | |
342 | ||
343 | // ======================================================================= | |
344 | // Constructor | |
345 | // ======================================================================= | |
550d787e FC |
346 | public StateTraceManagerRequest(TmfTimeRange range, long offset, int nbEvents, int maxBlockSize, |
347 | IRequestStatusListener listener, TmfTimeRange experimentTimeRange, ITransEventProcessor processor) { | |
5d10d135 | 348 | |
550d787e | 349 | super(range, offset, nbEvents, maxBlockSize, listener, experimentTimeRange, processor); |
5d10d135 ASL |
350 | fprocessor = processor; |
351 | TraceDebug.debug("Instance created for range: " + range.toString()); | |
352 | fCount = 0L; | |
353 | } | |
354 | ||
355 | // ======================================================================= | |
356 | // Methods | |
357 | // ======================================================================= | |
358 | /* | |
359 | * (non-Javadoc) | |
360 | * | |
361 | * @see | |
362 | * org.eclipse.linuxtools.lttng.request.LttngSyntEventRequest#handleData | |
363 | * () | |
364 | */ | |
365 | @Override | |
f9673903 FC |
366 | public void handleData(LttngSyntheticEvent event) { |
367 | super.handleData(event); | |
368 | if (event != null) { | |
369 | synEvent = event; | |
5d10d135 ASL |
370 | if (synEvent.getSynType() == SequenceInd.AFTER) { |
371 | // Note : We call this function before incrementing | |
372 | // eventCount to save a default check point at the "0th" | |
373 | // event | |
374 | saveCheckPoint(fCount, synEvent.getTimestamp()); | |
375 | fCount++; | |
376 | ||
377 | if (TraceDebug.isDEBUG()) { | |
378 | if (fCount % 1000 == 0) { | |
550d787e | 379 | TraceDebug.debug("handled: " + fCount + " sequence: " + synEvent.getSynType()); |
5d10d135 ASL |
380 | } |
381 | } | |
382 | } | |
383 | } | |
384 | } | |
385 | ||
386 | /** | |
387 | * To be overridden by active save e.g. check points, this no action | |
388 | * default is used for requests which do not require rebuilding of | |
389 | * checkpoints e.g. requiring data of a new time range selection | |
390 | * | |
391 | * @param count | |
392 | * @param time | |
393 | */ | |
394 | public void saveCheckPoint(Long count, TmfTimestamp time) { | |
395 | ||
396 | } | |
397 | } | |
398 | ||
399 | /* | |
400 | * (non-Javadoc) | |
401 | * | |
402 | * @see org.eclipse.linuxtools.lttng.state.resource.ILttngStateContext# | |
403 | * getNumberOfCpus() | |
404 | */ | |
d4011df2 | 405 | @Override |
5d10d135 ASL |
406 | public int getNumberOfCpus() { |
407 | return fcpuNumber; | |
408 | } | |
409 | ||
410 | /* | |
411 | * (non-Javadoc) | |
412 | * | |
413 | * @see org.eclipse.linuxtools.lttng.state.resource.ILttngStateContext# | |
414 | * getTraceTimeWindow() | |
415 | */ | |
d4011df2 | 416 | @Override |
5d10d135 ASL |
417 | public TmfTimeRange getTraceTimeWindow() { |
418 | if (fTrace != null) { | |
419 | return fTrace.getTimeRange(); | |
420 | ||
421 | } | |
422 | return null; | |
423 | } | |
424 | ||
425 | /* | |
426 | * (non-Javadoc) | |
427 | * | |
428 | * @see | |
429 | * org.eclipse.linuxtools.lttng.state.resource.ILttngStateContext#getTraceId | |
430 | * () | |
431 | */ | |
d4011df2 | 432 | @Override |
5d10d135 ASL |
433 | public String getTraceId() { |
434 | if (fTrace != null) { | |
435 | return fTrace.getName(); | |
436 | } | |
437 | return null; | |
438 | } | |
439 | ||
440 | /* | |
441 | * (non-Javadoc) | |
442 | * | |
443 | * @see org.eclipse.linuxtools.lttng.state.trace.IStateTraceManager# | |
444 | * getExperimentTimeWindow() | |
445 | */ | |
d4011df2 | 446 | @Override |
5d10d135 ASL |
447 | public TmfTimeRange getExperimentTimeWindow() { |
448 | if (fExperiment != null) { | |
449 | return fExperiment.getTimeRange(); | |
450 | } | |
451 | return null; | |
452 | } | |
453 | ||
454 | /* | |
455 | * (non-Javadoc) | |
456 | * | |
457 | * @see | |
458 | * org.eclipse.linuxtools.lttng.state.trace.IStateTraceManager#getExperimentName | |
459 | * () | |
460 | */ | |
d4011df2 | 461 | @Override |
5d10d135 ASL |
462 | public String getExperimentName() { |
463 | return fExperiment.getName(); | |
464 | } | |
465 | ||
466 | /* | |
467 | * (non-Javadoc) | |
468 | * | |
469 | * @see | |
470 | * org.eclipse.linuxtools.lttng.state.resource.ILttngStateContext#getTraceIdRef | |
471 | * () | |
472 | */ | |
d4011df2 | 473 | @Override |
5d10d135 ASL |
474 | public ITmfTrace getTraceIdRef() { |
475 | return fTrace; | |
476 | } | |
550d787e FC |
477 | |
478 | /* | |
479 | * (non-Javadoc) | |
480 | * | |
481 | * @see | |
482 | * org.eclipse.linuxtools.lttng.state.trace.IStateTraceManager#clearCheckPoints | |
483 | * () | |
484 | */ | |
d4011df2 | 485 | @Override |
c1c69938 FC |
486 | public void clearCheckPoints() { |
487 | synchronized (fCheckPointsLock) { | |
550d787e FC |
488 | stateCheckpointsList.clear(); |
489 | timestampCheckpointsList.clear(); | |
490 | ||
491 | fCheckPointStateModel = StateModelFactory.getStateEntryInstance(this); | |
c1c69938 | 492 | |
550d787e FC |
493 | try { |
494 | fCheckPointStateModel.init(this); | |
495 | } catch (LttngStateException e) { | |
496 | e.printStackTrace(); | |
497 | } | |
498 | } | |
499 | } | |
500 | ||
501 | /* | |
502 | * (non-Javadoc) | |
503 | * | |
504 | * @see | |
505 | * org.eclipse.linuxtools.lttng.state.trace.IStateTraceManager#handleEvent | |
506 | * (org.eclipse.linuxtools.lttng.event.LttngSyntheticEvent, java.lang.Long) | |
507 | */ | |
d4011df2 | 508 | @Override |
550d787e FC |
509 | public void handleEvent(LttngSyntheticEvent synEvent, Long eventCount) { |
510 | fStateUpdateProcessor.process(synEvent, fCheckPointStateModel); | |
511 | ||
512 | // Save checkpoint as needed | |
513 | saveCheckPointIfNeeded(eventCount - 1, synEvent.getTimestamp()); | |
514 | } | |
515 | ||
516 | /* | |
517 | * (non-Javadoc) | |
518 | * | |
519 | * @see java.lang.Object#toString() | |
520 | */ | |
cb866e08 | 521 | @Override |
550d787e FC |
522 | public String toString() { |
523 | StringBuilder sb = new StringBuilder(super.toString()); | |
524 | sb.append("\n\tTotal number of processes in the Shared State model: " + fStateModel.getProcesses().length | |
525 | + "\n\t" + "Total number of processes in the Check point State model: " | |
526 | + fCheckPointStateModel.getProcesses().length); | |
527 | ||
528 | TmfTimeRange traceTRange = fTrace.getTimeRange(); | |
529 | sb.append("\n\tTrace time interval for trace " + fTrace.getName() + "\n\t" | |
530 | + new LttngTimestamp(traceTRange.getStartTime())); | |
531 | sb.append(" - " + new LttngTimestamp(traceTRange.getEndTime())); | |
532 | sb.append("\n\tCheckPoints available at: "); | |
533 | for (TmfCheckpoint cpoint : timestampCheckpointsList) { | |
534 | sb.append("\n\t" + "Location: " + cpoint.getLocation() + " - " + cpoint.getTimestamp()); | |
535 | } | |
536 | ||
537 | return sb.toString(); | |
538 | } | |
539 | ||
540 | } |