org.eclipse.linuxtools.tmf.core/src/org/eclipse/linuxtools/tmf/core/ctfadaptor/CtfTmfTrace.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2013 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are made
   5  * 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  *   Matthew Khouzam - Initial API and implementation
  11  *   Patrick Tasse - Updated for removal of context clone
  12  *******************************************************************************/
  13
  14 package org.eclipse.linuxtools.tmf.core.ctfadaptor;
  15
  16 import java.nio.BufferOverflowException;
  17 import java.util.Collections;
  18 import java.util.Map;
  19
  20 import org.eclipse.core.resources.IProject;
  21 import org.eclipse.core.resources.IResource;
  22 import org.eclipse.core.runtime.IStatus;
  23 import org.eclipse.core.runtime.Status;
  24 import org.eclipse.linuxtools.ctf.core.event.IEventDeclaration;
  25 import org.eclipse.linuxtools.ctf.core.event.CTFClock;
  26 import org.eclipse.linuxtools.ctf.core.trace.CTFReaderException;
  27 import org.eclipse.linuxtools.ctf.core.trace.CTFTrace;
  28 import org.eclipse.linuxtools.ctf.core.trace.CTFTraceReader;
  29 import org.eclipse.linuxtools.internal.tmf.core.Activator;
  30 import org.eclipse.linuxtools.tmf.core.event.ITmfEvent;
  31 import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException;
  32 import org.eclipse.linuxtools.tmf.core.timestamp.ITmfTimestamp;
  33 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimestamp;
  34 import org.eclipse.linuxtools.tmf.core.trace.ITmfContext;
  35 import org.eclipse.linuxtools.tmf.core.trace.ITmfEventParser;
  36 import org.eclipse.linuxtools.tmf.core.trace.ITmfTraceProperties;
  37 import org.eclipse.linuxtools.tmf.core.trace.TmfTrace;
  38 import org.eclipse.linuxtools.tmf.core.trace.location.ITmfLocation;
  39
  40 /**
  41  * The CTf trace handler
  42  *
  43  * @version 1.0
  44  * @author Matthew khouzam
  45  */
  46 public class CtfTmfTrace extends TmfTrace
  47         implements ITmfEventParser, ITmfTraceProperties {
  48
  49     // -------------------------------------------
  50     // Constants
  51     // -------------------------------------------
  52     /**
  53      * Default cache size for CTF traces
  54      */
  55     protected static final int DEFAULT_CACHE_SIZE = 50000;
  56
  57     /*
  58      * The Ctf clock unique identifier field
  59      */
  60     private static final String CLOCK_HOST_PROPERTY = "uuid"; //$NON-NLS-1$
  61
  62     // -------------------------------------------
  63     // Fields
  64     // -------------------------------------------
  65
  66     /* Reference to the CTF Trace */
  67     private CTFTrace fTrace;
  68
  69     // -------------------------------------------
  70     // TmfTrace Overrides
  71     // -------------------------------------------
  72     /**
  73      * Method initTrace.
  74      *
  75      * @param resource
  76      *            The resource associated with this trace
  77      * @param path
  78      *            The path to the trace file
  79      * @param eventType
  80      *            The type of events that will be read from this trace
  81      * @throws TmfTraceException
  82      *             If something when wrong while reading the trace
  83      */
  84     @Override
  85     public void initTrace(final IResource resource, final String path, final Class<? extends ITmfEvent> eventType)
  86             throws TmfTraceException {
  87         /*
  88          * Set the cache size. This has to be done before the call to super()
  89          * because the super needs to know the cache size.
  90          */
  91         setCacheSize();
  92
  93         super.initTrace(resource, path, eventType);
  94
  95         @SuppressWarnings("unused")
  96         CtfTmfEventType type;
  97
  98         try {
  99             this.fTrace = new CTFTrace(path);
 100             CtfIteratorManager.addTrace(this);
 101             CtfTmfContext ctx;
 102             /* Set the start and (current) end times for this trace */
 103             ctx = (CtfTmfContext) seekEvent(0L);
 104             CtfTmfEvent event = getNext(ctx);
 105             if ((ctx.getLocation().equals(CtfIterator.NULL_LOCATION)) || (ctx.getCurrentEvent() == null)) {
 106                 /* Handle the case where the trace is empty */
 107                 this.setStartTime(TmfTimestamp.BIG_BANG);
 108             } else {
 109                 final ITmfTimestamp curTime = event.getTimestamp();
 110                 this.setStartTime(curTime);
 111                 this.setEndTime(curTime);
 112             }
 113
 114         } catch (final CTFReaderException e) {
 115             /*
 116              * If it failed at the init(), we can assume it's because the file
 117              * was not found or was not recognized as a CTF trace. Throw into
 118              * the new type of exception expected by the rest of TMF.
 119              */
 120             throw new TmfTraceException(e.getMessage(), e);
 121         }
 122     }
 123
 124     @Override
 125     public synchronized void dispose() {
 126         CtfIteratorManager.removeTrace(this);
 127         if (fTrace != null) {
 128             fTrace.dispose();
 129             fTrace = null;
 130         }
 131         super.dispose();
 132     }
 133
 134     /**
 135      * Method validate.
 136      *
 137      * @param project
 138      *            IProject
 139      * @param path
 140      *            String
 141      * @return IStatus IStatus.error or Status.OK_STATUS
 142      * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#validate(IProject, String)
 143      * @since 2.0
 144      */
 145     @Override
 146     public IStatus validate(final IProject project, final String path) {
 147         IStatus validTrace = Status.OK_STATUS;
 148         try {
 149             final CTFTrace temp = new CTFTrace(path);
 150             if (!temp.majortIsSet()) {
 151                 validTrace = new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.CtfTmfTrace_MajorNotSet);
 152             } else {
 153                 CTFTraceReader ctfTraceReader = new CTFTraceReader(temp);
 154                 if (!ctfTraceReader.hasMoreEvents()) {
 155                     // TODO: This will need an additional check when we support live traces
 156                     // because having no event is valid for a live trace
 157                     validTrace = new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.CtfTmfTrace_NoEvent);
 158                 }
 159                 ctfTraceReader.dispose();
 160             }
 161             temp.dispose();
 162         } catch (final CTFReaderException e) {
 163             validTrace = new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.CtfTmfTrace_ReadingError +": " + e.toString()); //$NON-NLS-1$
 164         } catch (final BufferOverflowException e){
 165             validTrace = new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.CtfTmfTrace_ReadingError +": " + Messages.CtfTmfTrace_BufferOverflowErrorMessage); //$NON-NLS-1$
 166         }
 167
 168         return validTrace;
 169     }
 170
 171     /**
 172      * Method getCurrentLocation. This is not applicable in CTF
 173      *
 174      * @return null, since the trace has no knowledge of the current location
 175      * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getCurrentLocation()
 176      * @since 3.0
 177      */
 178     @Override
 179     public ITmfLocation getCurrentLocation() {
 180         return null;
 181     }
 182
 183     /**
 184      * @since 3.0
 185      */
 186     @Override
 187     public double getLocationRatio(ITmfLocation location) {
 188         final CtfLocation curLocation = (CtfLocation) location;
 189         final CtfTmfContext context = new CtfTmfContext(this);
 190         context.setLocation(curLocation);
 191         context.seek(curLocation.getLocationInfo());
 192         final CtfLocationInfo currentTime = ((CtfLocationInfo) context.getLocation().getLocationInfo());
 193         final long startTime = getIterator(this, context).getStartTime();
 194         final long endTime = getIterator(this, context).getEndTime();
 195         return ((double) currentTime.getTimestamp() - startTime)
 196                 / (endTime - startTime);
 197     }
 198
 199     /**
 200      * Method seekEvent.
 201      *
 202      * @param location
 203      *            ITmfLocation<?>
 204      * @return ITmfContext
 205      * @since 3.0
 206      */
 207     @Override
 208     public synchronized ITmfContext seekEvent(final ITmfLocation location) {
 209         CtfLocation currentLocation = (CtfLocation) location;
 210         CtfTmfContext context = new CtfTmfContext(this);
 211         if (fTrace == null) {
 212             context.setLocation(null);
 213             context.setRank(ITmfContext.UNKNOWN_RANK);
 214             return context;
 215         }
 216         /*
 217          * The rank is set to 0 if the iterator seeks the beginning. If not, it
 218          * will be set to UNKNOWN_RANK, since CTF traces don't support seeking
 219          * by rank for now.
 220          */
 221         if (currentLocation == null) {
 222             currentLocation = new CtfLocation(new CtfLocationInfo(0L, 0L));
 223             context.setRank(0);
 224         }
 225         if (currentLocation.getLocationInfo() == CtfLocation.INVALID_LOCATION) {
 226             currentLocation = new CtfLocation(getEndTime().getValue() + 1, 0L);
 227         }
 228         context.setLocation(currentLocation);
 229         if (location == null) {
 230             CtfTmfEvent event = getIterator(this, context).getCurrentEvent();
 231             if (event != null) {
 232                 currentLocation = new CtfLocation(event.getTimestamp().getValue(), 0);
 233             }
 234         }
 235         if (context.getRank() != 0) {
 236             context.setRank(ITmfContext.UNKNOWN_RANK);
 237         }
 238         return context;
 239     }
 240
 241     @Override
 242     public synchronized ITmfContext seekEvent(double ratio) {
 243         CtfTmfContext context = new CtfTmfContext(this);
 244         if (fTrace == null) {
 245             context.setLocation(null);
 246             context.setRank(ITmfContext.UNKNOWN_RANK);
 247             return context;
 248         }
 249         final long end = this.getEndTime().getValue();
 250         final long start = this.getStartTime().getValue();
 251         final long diff = end - start;
 252         final long ratioTs = Math.round(diff * ratio) + start;
 253         context.seek(ratioTs);
 254         context.setRank(ITmfContext.UNKNOWN_RANK);
 255         return context;
 256     }
 257
 258     /**
 259      * Method readNextEvent.
 260      *
 261      * @param context
 262      *            ITmfContext
 263      * @return CtfTmfEvent
 264      * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getNext(ITmfContext)
 265      */
 266     @Override
 267     public synchronized CtfTmfEvent getNext(final ITmfContext context) {
 268         if (fTrace == null) {
 269             return null;
 270         }
 271         CtfTmfEvent event = null;
 272         if (context instanceof CtfTmfContext) {
 273             if (context.getLocation() == null || CtfLocation.INVALID_LOCATION.equals(context.getLocation().getLocationInfo())) {
 274                 return null;
 275             }
 276             CtfTmfContext ctfContext = (CtfTmfContext) context;
 277             event = ctfContext.getCurrentEvent();
 278
 279             if (event != null) {
 280                 updateAttributes(context, event.getTimestamp());
 281                 ctfContext.advance();
 282                 ctfContext.increaseRank();
 283             }
 284         }
 285
 286         return event;
 287     }
 288
 289     /**
 290      * gets the CTFtrace that this is wrapping
 291      *
 292      * @return the CTF trace
 293      */
 294     public CTFTrace getCTFTrace() {
 295         return fTrace;
 296     }
 297
 298     /**
 299      * Ctf traces have a clock with a unique uuid that will be used to identify
 300      * the host. Traces with the same clock uuid will be known to have been made
 301      * on the same machine.
 302      *
 303      * Note: uuid is an optional field, it may not be there for a clock.
 304      */
 305     @Override
 306     public String getHostId() {
 307         CTFClock clock = getCTFTrace().getClock();
 308         if (clock != null) {
 309             String clockHost = (String) clock.getProperty(CLOCK_HOST_PROPERTY);
 310             if (clockHost != null) {
 311                 return clockHost;
 312             }
 313         }
 314         return super.getHostId();
 315     }
 316
 317     // -------------------------------------------
 318     // ITmfTraceProperties
 319     // -------------------------------------------
 320
 321     /**
 322      * @since 2.0
 323      */
 324     @Override
 325     public Map<String, String> getTraceProperties() {
 326         return Collections.unmodifiableMap(fTrace.getEnvironment());
 327     }
 328
 329     // -------------------------------------------
 330     // Clocks
 331     // -------------------------------------------
 332
 333     /**
 334      * gets the clock offset
 335      *
 336      * @return the clock offset in ns
 337      */
 338     public long getOffset() {
 339         if (fTrace != null) {
 340             return fTrace.getOffset();
 341         }
 342         return 0;
 343     }
 344
 345     /**
 346      * Returns whether or not an event is in the metadata of the trace,
 347      * therefore if it can possibly be in the trace. It does not verify whether
 348      * or not the event is actually in the trace
 349      *
 350      * @param eventName
 351      *            The name of the event to check
 352      * @return Whether the event is in the metadata or not
 353      * @since 3.0
 354      */
 355     public boolean hasEvent(final String eventName) {
 356         Map<Long, IEventDeclaration> events = fTrace.getEvents(0L);
 357         if (events != null) {
 358             for (IEventDeclaration decl : events.values()) {
 359                 if (decl.getName().equals(eventName)) {
 360                     return true;
 361                 }
 362             }
 363         }
 364         return false;
 365     }
 366
 367     /**
 368      * Return whether all requested events are in the metadata
 369      *
 370      * @param names
 371      *            The array of events to check for
 372      * @return Whether all events are in the metadata
 373      * @since 3.0
 374      */
 375     public boolean hasAllEvents(String[] names) {
 376         for (String name : names) {
 377             if (!hasEvent(name)) {
 378                 return false;
 379             }
 380         }
 381         return true;
 382     }
 383
 384     /**
 385      * Returns whether the metadata contains at least one of the requested
 386      * events
 387      *
 388      * @param names
 389      *            The array of event names of check for
 390      * @return Whether one of the event is present in trace metadata
 391      * @since 3.0
 392      */
 393     public boolean hasAtLeastOneOfEvents(String[] names) {
 394         for (String name : names) {
 395             if (hasEvent(name)) {
 396                 return true;
 397             }
 398         }
 399         return false;
 400     }
 401
 402     // -------------------------------------------
 403     // Parser
 404     // -------------------------------------------
 405
 406     @Override
 407     public CtfTmfEvent parseEvent(ITmfContext context) {
 408         CtfTmfEvent event = null;
 409         if (context instanceof CtfTmfContext) {
 410             final ITmfContext tmpContext = seekEvent(context.getLocation());
 411             event = getNext(tmpContext);
 412         }
 413         return event;
 414     }
 415
 416     /**
 417      * Sets the cache size for a CtfTmfTrace.
 418      */
 419     protected void setCacheSize() {
 420         setCacheSize(DEFAULT_CACHE_SIZE);
 421     }
 422
 423     // -------------------------------------------
 424     // Helpers
 425     // -------------------------------------------
 426
 427     private static CtfIterator getIterator(CtfTmfTrace trace, CtfTmfContext context) {
 428         return CtfIteratorManager.getIterator(trace, context);
 429     }
 430
 431     /**
 432      * Get an iterator to the trace
 433      *
 434      * @return an iterator to the trace
 435      * @since 2.0
 436      */
 437     public CtfIterator createIterator() {
 438         return new CtfIterator(this);
 439     }
 440 }