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8a6ff07f | 1 | /******************************************************************************* |
60ae41e1 | 2 | * Copyright (c) 2013, 2014 École Polytechnique de Montréal |
8a6ff07f GB |
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 | * Geneviève Bastien - Initial API and implementation | |
baa96b1d | 11 | * Bernd Hufmann - Integrated history builder functionality |
8a6ff07f GB |
12 | *******************************************************************************/ |
13 | ||
2bdf0193 | 14 | package org.eclipse.tracecompass.tmf.core.statesystem; |
8a6ff07f GB |
15 | |
16 | import java.io.File; | |
baa96b1d | 17 | import java.io.IOException; |
5237a931 | 18 | import java.util.Collections; |
09ec275e | 19 | import java.util.concurrent.CountDownLatch; |
8a6ff07f GB |
20 | |
21 | import org.eclipse.core.runtime.IProgressMonitor; | |
e1c415b3 | 22 | import org.eclipse.core.runtime.IStatus; |
baa96b1d | 23 | import org.eclipse.core.runtime.NullProgressMonitor; |
8a6ff07f | 24 | import org.eclipse.jdt.annotation.NonNull; |
baa96b1d BH |
25 | import org.eclipse.jdt.annotation.NonNullByDefault; |
26 | import org.eclipse.jdt.annotation.Nullable; | |
2bdf0193 AM |
27 | import org.eclipse.tracecompass.internal.tmf.core.statesystem.backends.partial.PartialHistoryBackend; |
28 | import org.eclipse.tracecompass.internal.tmf.core.statesystem.backends.partial.PartialStateSystem; | |
e894a508 AM |
29 | import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem; |
30 | import org.eclipse.tracecompass.statesystem.core.ITmfStateSystemBuilder; | |
31 | import org.eclipse.tracecompass.statesystem.core.StateSystemFactory; | |
32 | import org.eclipse.tracecompass.statesystem.core.backend.IStateHistoryBackend; | |
33 | import org.eclipse.tracecompass.statesystem.core.backend.InMemoryBackend; | |
34 | import org.eclipse.tracecompass.statesystem.core.backend.NullBackend; | |
35 | import org.eclipse.tracecompass.statesystem.core.backend.historytree.HistoryTreeBackend; | |
36 | import org.eclipse.tracecompass.statesystem.core.backend.historytree.ThreadedHistoryTreeBackend; | |
2bdf0193 AM |
37 | import org.eclipse.tracecompass.tmf.core.analysis.TmfAbstractAnalysisModule; |
38 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; | |
39 | import org.eclipse.tracecompass.tmf.core.exceptions.TmfTraceException; | |
40 | import org.eclipse.tracecompass.tmf.core.request.ITmfEventRequest; | |
41 | import org.eclipse.tracecompass.tmf.core.request.TmfEventRequest; | |
de83d1ab MAL |
42 | import org.eclipse.tracecompass.tmf.core.signal.TmfSignalHandler; |
43 | import org.eclipse.tracecompass.tmf.core.signal.TmfTraceRangeUpdatedSignal; | |
2bdf0193 AM |
44 | import org.eclipse.tracecompass.tmf.core.timestamp.TmfTimeRange; |
45 | import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace; | |
de83d1ab | 46 | import org.eclipse.tracecompass.tmf.core.trace.ITmfTraceCompleteness; |
2bdf0193 AM |
47 | import org.eclipse.tracecompass.tmf.core.trace.TmfExperiment; |
48 | import org.eclipse.tracecompass.tmf.core.trace.TmfTraceManager; | |
8a6ff07f GB |
49 | |
50 | /** | |
51 | * Abstract analysis module to generate a state system. It is a base class that | |
52 | * can be used as a shortcut by analysis who just need to build a single state | |
53 | * system with a state provider. | |
54 | * | |
55 | * Analysis implementing this class should only need to provide a state system | |
56 | * and optionally a backend (default to NULL) and, if required, a filename | |
57 | * (defaults to the analysis'ID) | |
58 | * | |
59 | * @author Geneviève Bastien | |
60 | * @since 3.0 | |
61 | */ | |
baa96b1d | 62 | @NonNullByDefault |
8a6ff07f | 63 | public abstract class TmfStateSystemAnalysisModule extends TmfAbstractAnalysisModule |
5237a931 | 64 | implements ITmfAnalysisModuleWithStateSystems { |
8a6ff07f | 65 | |
8a6ff07f GB |
66 | private static final String EXTENSION = ".ht"; //$NON-NLS-1$ |
67 | ||
09ec275e | 68 | private final CountDownLatch fInitialized = new CountDownLatch(1); |
de83d1ab | 69 | private final Object fRequestSyncObj = new Object(); |
09ec275e | 70 | |
baa96b1d BH |
71 | @Nullable private ITmfStateSystemBuilder fStateSystem; |
72 | @Nullable private ITmfStateProvider fStateProvider; | |
73 | @Nullable private IStateHistoryBackend fHtBackend; | |
74 | @Nullable private ITmfEventRequest fRequest; | |
de83d1ab MAL |
75 | @Nullable private TmfTimeRange fTimeRange = null; |
76 | ||
77 | private int fNbRead = 0; | |
5237a931 | 78 | |
8a6ff07f GB |
79 | /** |
80 | * State system backend types | |
81 | * | |
82 | * @author Geneviève Bastien | |
83 | */ | |
84 | protected enum StateSystemBackendType { | |
85 | /** Full history in file */ | |
86 | FULL, | |
87 | /** In memory state system */ | |
88 | INMEM, | |
89 | /** Null history */ | |
90 | NULL, | |
91 | /** State system backed with partial history */ | |
92 | PARTIAL | |
93 | } | |
94 | ||
72221aa4 AM |
95 | |
96 | /** | |
97 | * Retrieve a state system belonging to trace, by passing the ID of the | |
98 | * relevant analysis module. | |
99 | * | |
100 | * This will start the execution of the analysis module, and start the | |
101 | * construction of the state system, if needed. | |
102 | * | |
103 | * @param trace | |
104 | * The trace for which you want the state system | |
105 | * @param moduleId | |
106 | * The ID of the state system analysis module | |
107 | * @return The state system, or null if there was no match | |
108 | * @since 3.1 | |
109 | */ | |
110 | public static @Nullable ITmfStateSystem getStateSystem(ITmfTrace trace, String moduleId) { | |
111 | TmfStateSystemAnalysisModule module = | |
112 | trace.getAnalysisModuleOfClass(TmfStateSystemAnalysisModule.class, moduleId); | |
113 | if (module != null) { | |
e1c415b3 BH |
114 | IStatus status = module.schedule(); |
115 | if (status.isOK()) { | |
116 | module.waitForInitialization(); | |
e1c415b3 BH |
117 | return module.getStateSystem(); |
118 | } | |
72221aa4 AM |
119 | } |
120 | return null; | |
121 | } | |
122 | ||
8a6ff07f GB |
123 | /** |
124 | * Get the state provider for this analysis module | |
125 | * | |
126 | * @return the state provider | |
127 | */ | |
8a6ff07f GB |
128 | protected abstract ITmfStateProvider createStateProvider(); |
129 | ||
130 | /** | |
131 | * Get the state system backend type used by this module | |
132 | * | |
133 | * @return The {@link StateSystemBackendType} | |
134 | */ | |
a3b864c0 AM |
135 | protected StateSystemBackendType getBackendType() { |
136 | /* Using full history by default, sub-classes can override */ | |
137 | return StateSystemBackendType.FULL; | |
138 | } | |
8a6ff07f GB |
139 | |
140 | /** | |
141 | * Get the supplementary file name where to save this state system. The | |
142 | * default is the ID of the analysis followed by the extension. | |
143 | * | |
144 | * @return The supplementary file name | |
145 | */ | |
146 | protected String getSsFileName() { | |
147 | return getId() + EXTENSION; | |
148 | } | |
149 | ||
150 | /** | |
baa96b1d BH |
151 | * Get the state system generated by this analysis, or null if it is not yet |
152 | * created. | |
8a6ff07f GB |
153 | * |
154 | * @return The state system | |
155 | */ | |
baa96b1d | 156 | @Nullable |
8a6ff07f GB |
157 | public ITmfStateSystem getStateSystem() { |
158 | return fStateSystem; | |
159 | } | |
160 | ||
09ec275e AM |
161 | /** |
162 | * Block the calling thread until the analysis module has been initialized. | |
163 | * After this method returns, {@link #getStateSystem()} should not return | |
164 | * null anymore. | |
165 | */ | |
166 | public void waitForInitialization() { | |
167 | try { | |
168 | fInitialized.await(); | |
169 | } catch (InterruptedException e) {} | |
170 | } | |
171 | ||
baa96b1d BH |
172 | // ------------------------------------------------------------------------ |
173 | // TmfAbstractAnalysisModule | |
174 | // ------------------------------------------------------------------------ | |
8a6ff07f | 175 | |
baa96b1d BH |
176 | @Override |
177 | protected boolean executeAnalysis(@Nullable final IProgressMonitor monitor) { | |
178 | IProgressMonitor mon = (monitor == null ? new NullProgressMonitor() : monitor); | |
179 | final ITmfStateProvider provider = createStateProvider(); | |
8a6ff07f | 180 | |
84a9548a | 181 | String id = getId(); |
84a9548a | 182 | |
8a6ff07f GB |
183 | /* FIXME: State systems should make use of the monitor, to be cancelled */ |
184 | try { | |
185 | /* Get the state system according to backend */ | |
186 | StateSystemBackendType backend = getBackendType(); | |
187 | String directory; | |
baa96b1d | 188 | File htFile; |
e1c415b3 BH |
189 | |
190 | ITmfTrace trace = getTrace(); | |
191 | if (trace == null) { | |
192 | // Analysis was cancelled in the meantime | |
193 | fInitialized.countDown(); | |
194 | return false; | |
195 | } | |
8a6ff07f GB |
196 | switch (backend) { |
197 | case FULL: | |
e1c415b3 | 198 | directory = TmfTraceManager.getSupplementaryFileDir(trace); |
baa96b1d | 199 | htFile = new File(directory + getSsFileName()); |
84a9548a | 200 | createFullHistory(id, provider, htFile); |
8a6ff07f GB |
201 | break; |
202 | case PARTIAL: | |
e1c415b3 | 203 | directory = TmfTraceManager.getSupplementaryFileDir(trace); |
baa96b1d | 204 | htFile = new File(directory + getSsFileName()); |
84a9548a | 205 | createPartialHistory(id, provider, htFile); |
8a6ff07f GB |
206 | break; |
207 | case INMEM: | |
84a9548a | 208 | createInMemoryHistory(id, provider); |
8a6ff07f GB |
209 | break; |
210 | case NULL: | |
84a9548a | 211 | createNullHistory(id, provider); |
8a6ff07f GB |
212 | break; |
213 | default: | |
214 | break; | |
215 | } | |
216 | } catch (TmfTraceException e) { | |
e1c415b3 | 217 | fInitialized.countDown(); |
8a6ff07f GB |
218 | return false; |
219 | } | |
baa96b1d | 220 | return !mon.isCanceled(); |
8a6ff07f GB |
221 | } |
222 | ||
223 | @Override | |
224 | protected void canceling() { | |
baa96b1d BH |
225 | ITmfEventRequest req = fRequest; |
226 | if ((req != null) && (!req.isCompleted())) { | |
227 | req.cancel(); | |
228 | } | |
229 | } | |
230 | ||
a1529f38 AM |
231 | @Override |
232 | public void dispose() { | |
130e6f4e | 233 | super.dispose(); |
a1529f38 AM |
234 | if (fStateSystem != null) { |
235 | fStateSystem.dispose(); | |
236 | } | |
a1529f38 AM |
237 | } |
238 | ||
baa96b1d BH |
239 | // ------------------------------------------------------------------------ |
240 | // History creation methods | |
241 | // ------------------------------------------------------------------------ | |
242 | ||
243 | /* | |
244 | * Load the history file matching the target trace. If the file already | |
245 | * exists, it will be opened directly. If not, it will be created from | |
246 | * scratch. | |
247 | */ | |
84a9548a | 248 | private void createFullHistory(String id, ITmfStateProvider provider, File htFile) throws TmfTraceException { |
baa96b1d BH |
249 | |
250 | /* If the target file already exists, do not rebuild it uselessly */ | |
251 | // TODO for now we assume it's complete. Might be a good idea to check | |
252 | // at least if its range matches the trace's range. | |
253 | ||
254 | if (htFile.exists()) { | |
255 | /* Load an existing history */ | |
256 | final int version = provider.getVersion(); | |
257 | try { | |
84a9548a AM |
258 | IStateHistoryBackend backend = new HistoryTreeBackend(htFile, version); |
259 | fHtBackend = backend; | |
bcec0116 | 260 | fStateSystem = StateSystemFactory.newStateSystem(id, backend, false); |
09ec275e | 261 | fInitialized.countDown(); |
baa96b1d BH |
262 | return; |
263 | } catch (IOException e) { | |
264 | /* | |
265 | * There was an error opening the existing file. Perhaps it was | |
266 | * corrupted, perhaps it's an old version? We'll just | |
267 | * fall-through and try to build a new one from scratch instead. | |
268 | */ | |
269 | } | |
270 | } | |
271 | ||
272 | /* Size of the blocking queue to use when building a state history */ | |
273 | final int QUEUE_SIZE = 10000; | |
274 | ||
275 | try { | |
84a9548a | 276 | IStateHistoryBackend backend = new ThreadedHistoryTreeBackend(htFile, |
baa96b1d | 277 | provider.getStartTime(), provider.getVersion(), QUEUE_SIZE); |
84a9548a | 278 | fHtBackend = backend; |
bcec0116 | 279 | fStateSystem = StateSystemFactory.newStateSystem(id, backend); |
baa96b1d BH |
280 | provider.assignTargetStateSystem(fStateSystem); |
281 | build(provider); | |
282 | } catch (IOException e) { | |
283 | /* | |
284 | * If it fails here however, it means there was a problem writing to | |
285 | * the disk, so throw a real exception this time. | |
286 | */ | |
287 | throw new TmfTraceException(e.toString(), e); | |
288 | } | |
289 | } | |
290 | ||
291 | /* | |
292 | * Create a new state system backed with a partial history. A partial | |
293 | * history is similar to a "full" one (which you get with | |
294 | * {@link #newFullHistory}), except that the file on disk is much smaller, | |
295 | * but queries are a bit slower. | |
296 | * | |
297 | * Also note that single-queries are implemented using a full-query | |
298 | * underneath, (which are much slower), so this might not be a good fit for | |
299 | * a use case where you have to do lots of single queries. | |
300 | */ | |
84a9548a | 301 | private void createPartialHistory(String id, ITmfStateProvider provider, File htPartialFile) |
baa96b1d BH |
302 | throws TmfTraceException { |
303 | /* | |
304 | * The order of initializations is very tricky (but very important!) | |
305 | * here. We need to follow this pattern: | |
306 | * (1 is done before the call to this method) | |
307 | * | |
308 | * 1- Instantiate realStateProvider | |
309 | * 2- Instantiate realBackend | |
310 | * 3- Instantiate partialBackend, with prereqs: | |
311 | * 3a- Instantiate partialProvider, via realProvider.getNew() | |
312 | * 3b- Instantiate nullBackend (partialSS's backend) | |
313 | * 3c- Instantiate partialSS | |
314 | * 3d- partialProvider.assignSS(partialSS) | |
315 | * 4- Instantiate realSS | |
316 | * 5- partialSS.assignUpstream(realSS) | |
317 | * 6- realProvider.assignSS(realSS) | |
318 | * 7- Call HistoryBuilder(realProvider, realSS, partialBackend) to build the thing. | |
319 | */ | |
320 | ||
321 | /* Size of the blocking queue to use when building a state history */ | |
322 | final int QUEUE_SIZE = 10000; | |
323 | ||
324 | final long granularity = 50000; | |
325 | ||
326 | /* 2 */ | |
327 | IStateHistoryBackend realBackend = null; | |
328 | try { | |
329 | realBackend = new ThreadedHistoryTreeBackend(htPartialFile, | |
330 | provider.getStartTime(), provider.getVersion(), QUEUE_SIZE); | |
331 | } catch (IOException e) { | |
332 | throw new TmfTraceException(e.toString(), e); | |
333 | } | |
334 | ||
335 | /* 3a */ | |
336 | ITmfStateProvider partialProvider = provider.getNewInstance(); | |
337 | ||
338 | /* 3b-3c, constructor automatically uses a NullBackend */ | |
339 | PartialStateSystem pss = new PartialStateSystem(); | |
340 | ||
341 | /* 3d */ | |
342 | partialProvider.assignTargetStateSystem(pss); | |
343 | ||
344 | /* 3 */ | |
345 | IStateHistoryBackend partialBackend = | |
346 | new PartialHistoryBackend(partialProvider, pss, realBackend, granularity); | |
347 | ||
348 | /* 4 */ | |
bcec0116 | 349 | @SuppressWarnings("restriction") |
e894a508 AM |
350 | org.eclipse.tracecompass.internal.statesystem.core.StateSystem realSS = |
351 | (org.eclipse.tracecompass.internal.statesystem.core.StateSystem) StateSystemFactory.newStateSystem(id, partialBackend); | |
baa96b1d BH |
352 | |
353 | /* 5 */ | |
354 | pss.assignUpstream(realSS); | |
355 | ||
356 | /* 6 */ | |
357 | provider.assignTargetStateSystem(realSS); | |
358 | ||
359 | /* 7 */ | |
360 | fHtBackend = partialBackend; | |
361 | fStateSystem = realSS; | |
362 | ||
363 | build(provider); | |
364 | } | |
365 | ||
366 | /* | |
367 | * Create a new state system using a null history back-end. This means that | |
368 | * no history intervals will be saved anywhere, and as such only | |
369 | * {@link ITmfStateSystem#queryOngoingState} will be available. | |
370 | */ | |
84a9548a AM |
371 | private void createNullHistory(String id, ITmfStateProvider provider) { |
372 | IStateHistoryBackend backend = new NullBackend(); | |
373 | fHtBackend = backend; | |
bcec0116 | 374 | fStateSystem = StateSystemFactory.newStateSystem(id, backend); |
baa96b1d BH |
375 | provider.assignTargetStateSystem(fStateSystem); |
376 | build(provider); | |
377 | } | |
378 | ||
379 | /* | |
380 | * Create a new state system using in-memory interval storage. This should | |
381 | * only be done for very small state system, and will be naturally limited | |
382 | * to 2^31 intervals. | |
383 | */ | |
84a9548a AM |
384 | private void createInMemoryHistory(String id, ITmfStateProvider provider) { |
385 | IStateHistoryBackend backend = new InMemoryBackend(provider.getStartTime()); | |
386 | fHtBackend = backend; | |
bcec0116 | 387 | fStateSystem = StateSystemFactory.newStateSystem(id, backend); |
baa96b1d BH |
388 | provider.assignTargetStateSystem(fStateSystem); |
389 | build(provider); | |
390 | } | |
391 | ||
a1529f38 | 392 | private void disposeProvider(boolean deleteFiles) { |
baa96b1d BH |
393 | ITmfStateProvider provider = fStateProvider; |
394 | if (provider != null) { | |
395 | provider.dispose(); | |
396 | } | |
397 | if (deleteFiles && (fHtBackend != null)) { | |
398 | fHtBackend.removeFiles(); | |
399 | } | |
400 | } | |
401 | ||
402 | private void build(ITmfStateProvider provider) { | |
403 | if ((fStateSystem == null) || (fHtBackend == null)) { | |
404 | throw new IllegalArgumentException(); | |
405 | } | |
406 | ||
407 | ITmfEventRequest request = fRequest; | |
408 | if ((request != null) && (!request.isCompleted())) { | |
409 | request.cancel(); | |
410 | } | |
411 | ||
de83d1ab MAL |
412 | fTimeRange = TmfTimeRange.ETERNITY; |
413 | final ITmfTrace trace = provider.getTrace(); | |
414 | if (trace != null && !isCompleteTrace(trace)) { | |
415 | TmfTimeRange traceTimeRange = trace.getTimeRange(); | |
416 | if (traceTimeRange != null) { | |
417 | fTimeRange = traceTimeRange; | |
418 | } | |
419 | } | |
baa96b1d | 420 | |
baa96b1d | 421 | fStateProvider = provider; |
de83d1ab MAL |
422 | synchronized (fRequestSyncObj) { |
423 | startRequest(); | |
424 | } | |
baa96b1d | 425 | |
09ec275e AM |
426 | /* |
427 | * The state system object is now created, we can consider this module | |
428 | * "initialized" (components can retrieve it and start doing queries). | |
429 | */ | |
430 | fInitialized.countDown(); | |
431 | ||
432 | /* | |
433 | * Block the executeAnalysis() construction is complete (so that the | |
434 | * progress monitor displays that it is running). | |
435 | */ | |
baa96b1d | 436 | try { |
de83d1ab MAL |
437 | if (fRequest != null) { |
438 | fRequest.waitForCompletion(); | |
439 | } | |
baa96b1d BH |
440 | } catch (InterruptedException e) { |
441 | e.printStackTrace(); | |
442 | } | |
443 | } | |
444 | ||
445 | private class StateSystemEventRequest extends TmfEventRequest { | |
446 | private final ITmfStateProvider sci; | |
447 | private final ITmfTrace trace; | |
448 | ||
de83d1ab | 449 | public StateSystemEventRequest(ITmfStateProvider sp, TmfTimeRange timeRange, int index) { |
baa96b1d | 450 | super(sp.getExpectedEventType(), |
de83d1ab MAL |
451 | timeRange, |
452 | index, | |
baa96b1d BH |
453 | ITmfEventRequest.ALL_DATA, |
454 | ITmfEventRequest.ExecutionType.BACKGROUND); | |
455 | this.sci = sp; | |
456 | ||
457 | // sci.getTrace() will eventually return a @NonNull | |
458 | @SuppressWarnings("null") | |
459 | @NonNull ITmfTrace tr = sci.getTrace(); | |
2d208fb7 | 460 | trace = tr; |
baa96b1d | 461 | |
baa96b1d BH |
462 | } |
463 | ||
464 | @Override | |
41f3b36b | 465 | public void handleData(final ITmfEvent event) { |
baa96b1d | 466 | super.handleData(event); |
41f3b36b | 467 | if (event.getTrace() == trace) { |
baa96b1d | 468 | sci.processEvent(event); |
2d208fb7 GB |
469 | } else if (trace instanceof TmfExperiment) { |
470 | /* | |
471 | * If the request is for an experiment, check if the event is | |
472 | * from one of the child trace | |
473 | */ | |
474 | for (ITmfTrace childTrace : ((TmfExperiment) trace).getTraces()) { | |
475 | if (childTrace == event.getTrace()) { | |
476 | sci.processEvent(event); | |
477 | } | |
478 | } | |
baa96b1d BH |
479 | } |
480 | } | |
481 | ||
482 | @Override | |
483 | public void handleSuccess() { | |
484 | super.handleSuccess(); | |
de83d1ab MAL |
485 | if (isCompleteTrace(trace)) { |
486 | disposeProvider(false); | |
487 | } else { | |
488 | fNbRead += getNbRead(); | |
489 | synchronized (fRequestSyncObj) { | |
490 | final TmfTimeRange timeRange = fTimeRange; | |
491 | if (timeRange != null) { | |
492 | if (getRange().getEndTime().getValue() < timeRange.getEndTime().getValue()) { | |
493 | startRequest(); | |
494 | } | |
495 | } | |
496 | } | |
497 | } | |
baa96b1d BH |
498 | } |
499 | ||
500 | @Override | |
501 | public void handleCancel() { | |
502 | super.handleCancel(); | |
de83d1ab MAL |
503 | if (isCompleteTrace(trace)) { |
504 | disposeProvider(true); | |
505 | } | |
baa96b1d BH |
506 | } |
507 | ||
508 | @Override | |
509 | public void handleFailure() { | |
510 | super.handleFailure(); | |
a1529f38 | 511 | disposeProvider(true); |
baa96b1d | 512 | } |
8a6ff07f GB |
513 | } |
514 | ||
5237a931 AM |
515 | // ------------------------------------------------------------------------ |
516 | // ITmfAnalysisModuleWithStateSystems | |
517 | // ------------------------------------------------------------------------ | |
518 | ||
519 | @Override | |
baa96b1d BH |
520 | @Nullable |
521 | public ITmfStateSystem getStateSystem(String id) { | |
5237a931 AM |
522 | if (id.equals(getId())) { |
523 | return fStateSystem; | |
524 | } | |
525 | return null; | |
526 | } | |
527 | ||
8a6ff07f | 528 | @Override |
5237a931 | 529 | public Iterable<ITmfStateSystem> getStateSystems() { |
baa96b1d BH |
530 | @SuppressWarnings("null") |
531 | @NonNull Iterable<ITmfStateSystem> ret = Collections.singleton((ITmfStateSystem) fStateSystem); | |
532 | return ret; | |
8a6ff07f | 533 | } |
de83d1ab MAL |
534 | |
535 | /** | |
536 | * Signal handler for the TmfTraceRangeUpdatedSignal signal | |
537 | * | |
538 | * @param signal The incoming signal | |
539 | */ | |
540 | @TmfSignalHandler | |
541 | public void traceRangeUpdated(final TmfTraceRangeUpdatedSignal signal) { | |
542 | fTimeRange = signal.getRange(); | |
543 | ITmfStateProvider stateProvider = fStateProvider; | |
544 | synchronized (fRequestSyncObj) { | |
545 | if (signal.getTrace() == getTrace() && stateProvider != null && stateProvider.getAssignedStateSystem() != null) { | |
546 | ITmfEventRequest request = fRequest; | |
547 | if ((request == null) || request.isCompleted()) { | |
548 | startRequest(); | |
549 | } | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | private void startRequest() { | |
555 | ITmfStateProvider stateProvider = fStateProvider; | |
556 | TmfTimeRange timeRange = fTimeRange; | |
557 | if (stateProvider == null || timeRange == null) { | |
558 | return; | |
559 | } | |
560 | ITmfEventRequest request = new StateSystemEventRequest(stateProvider, timeRange, fNbRead); | |
561 | stateProvider.getTrace().sendRequest(request); | |
562 | fRequest = request; | |
563 | } | |
564 | ||
565 | private static boolean isCompleteTrace(ITmfTrace trace) { | |
566 | return !(trace instanceof ITmfTraceCompleteness) || ((ITmfTraceCompleteness) trace).isComplete(); | |
567 | } | |
8a6ff07f | 568 | } |