Enrico Granata | 5c56d2a | 2017-02-07 15:38:12 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.car; |
| 18 | |
| 19 | import android.annotation.Nullable; |
| 20 | import android.car.annotation.FutureFeature; |
| 21 | import android.car.hardware.CarDiagnosticEvent; |
| 22 | import android.car.hardware.CarDiagnosticManager; |
| 23 | import android.car.hardware.ICarDiagnostic; |
| 24 | import android.car.hardware.ICarDiagnosticEventListener; |
| 25 | import android.content.Context; |
| 26 | import android.content.pm.PackageManager; |
| 27 | import android.os.Binder; |
| 28 | import android.os.Handler; |
| 29 | import android.os.IBinder; |
| 30 | import android.os.Looper; |
| 31 | import android.os.Message; |
| 32 | import android.os.Process; |
| 33 | import android.os.RemoteException; |
| 34 | import android.os.SystemClock; |
| 35 | import android.util.ArrayMap; |
| 36 | import android.util.Log; |
| 37 | import com.android.car.Listeners.ClientWithRate; |
| 38 | import com.android.car.hal.DiagnosticHalService; |
| 39 | import com.android.internal.annotations.GuardedBy; |
| 40 | import java.io.PrintWriter; |
| 41 | import java.util.ArrayList; |
| 42 | import java.util.Arrays; |
| 43 | import java.util.ConcurrentModificationException; |
| 44 | import java.util.HashMap; |
| 45 | import java.util.HashSet; |
| 46 | import java.util.LinkedList; |
| 47 | import java.util.List; |
| 48 | import java.util.Objects; |
| 49 | import java.util.Set; |
| 50 | import java.util.concurrent.locks.ReentrantLock; |
| 51 | |
| 52 | @FutureFeature |
| 53 | /** @hide */ |
| 54 | public class CarDiagnosticService extends ICarDiagnostic.Stub |
| 55 | implements CarServiceBase, DiagnosticHalService.DiagnosticListener { |
| 56 | /** {@link #mDiagnosticLock} is not waited forever for handling disconnection */ |
| 57 | private static final long MAX_DIAGNOSTIC_LOCK_WAIT_MS = 1000; |
| 58 | |
| 59 | /** lock to access diagnostic structures */ |
| 60 | private final ReentrantLock mDiagnosticLock = new ReentrantLock(); |
| 61 | /** hold clients callback */ |
| 62 | @GuardedBy("mDiagnosticLock") |
| 63 | private final LinkedList<DiagnosticClient> mClients = new LinkedList<>(); |
| 64 | |
| 65 | /** key: diagnostic type. */ |
| 66 | @GuardedBy("mDiagnosticLock") |
| 67 | private final HashMap<Integer, Listeners<DiagnosticClient>> mDiagnosticListeners = |
| 68 | new HashMap<>(); |
| 69 | |
| 70 | /** the latest live frame data. */ |
| 71 | @GuardedBy("mDiagnosticLock") |
| 72 | private final LiveFrameRecord mLiveFrameDiagnosticRecord = new LiveFrameRecord(mDiagnosticLock); |
| 73 | |
| 74 | /** the latest freeze frame data (key: DTC) */ |
| 75 | @GuardedBy("mDiagnosticLock") |
| 76 | private final FreezeFrameRecord mFreezeFrameDiagnosticRecords = new FreezeFrameRecord( |
| 77 | mDiagnosticLock); |
| 78 | |
| 79 | private final DiagnosticHalService mDiagnosticHal; |
| 80 | |
| 81 | private final Context mContext; |
| 82 | |
| 83 | public CarDiagnosticService(Context context, DiagnosticHalService diagnosticHal) { |
| 84 | mContext = context; |
| 85 | mDiagnosticHal = diagnosticHal; |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public void init() { |
| 90 | mDiagnosticLock.lock(); |
| 91 | try { |
| 92 | mDiagnosticHal.setDiagnosticListener(this); |
| 93 | setInitialLiveFrame(); |
| 94 | setInitialFreezeFrames(); |
| 95 | } finally { |
| 96 | mDiagnosticLock.unlock(); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | private CarDiagnosticEvent setInitialLiveFrame() { |
| 101 | CarDiagnosticEvent liveFrame = setRecentmostLiveFrame(mDiagnosticHal.getCurrentLiveFrame()); |
| 102 | return liveFrame; |
| 103 | } |
| 104 | |
| 105 | private void setInitialFreezeFrames() { |
| 106 | for (long timestamp: mDiagnosticHal.getFreezeFrameTimestamps()) { |
| 107 | setRecentmostFreezeFrame(mDiagnosticHal.getFreezeFrame(timestamp)); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | private CarDiagnosticEvent setRecentmostLiveFrame(final CarDiagnosticEvent event) { |
| 112 | return mLiveFrameDiagnosticRecord.update(Objects.requireNonNull(event).checkLiveFrame()); |
| 113 | } |
| 114 | |
| 115 | private CarDiagnosticEvent setRecentmostFreezeFrame(final CarDiagnosticEvent event) { |
| 116 | return mFreezeFrameDiagnosticRecords.update( |
| 117 | Objects.requireNonNull(event).checkFreezeFrame()); |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public void release() { |
| 122 | mDiagnosticLock.lock(); |
| 123 | try { |
| 124 | mDiagnosticListeners.forEach( |
| 125 | (Integer frameType, Listeners diagnosticListeners) -> |
| 126 | diagnosticListeners.release()); |
| 127 | mDiagnosticListeners.clear(); |
| 128 | mLiveFrameDiagnosticRecord.disableIfNeeded(); |
| 129 | mFreezeFrameDiagnosticRecords.disableIfNeeded(); |
| 130 | mClients.clear(); |
| 131 | } finally { |
| 132 | mDiagnosticLock.unlock(); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | private void processDiagnosticData(List<CarDiagnosticEvent> events) { |
| 137 | ArrayMap<CarDiagnosticService.DiagnosticClient, List<CarDiagnosticEvent>> eventsByClient = |
| 138 | new ArrayMap<>(); |
| 139 | |
| 140 | Listeners<DiagnosticClient> listeners = null; |
| 141 | |
| 142 | mDiagnosticLock.lock(); |
| 143 | for (CarDiagnosticEvent event : events) { |
| 144 | if (event.isLiveFrame()) { |
| 145 | // record recent-most live frame information |
| 146 | setRecentmostLiveFrame(event); |
| 147 | listeners = mDiagnosticListeners.get(CarDiagnosticManager.FRAME_TYPE_FLAG_LIVE); |
| 148 | } else if (event.isFreezeFrame()) { |
| 149 | setRecentmostFreezeFrame(event); |
| 150 | listeners = mDiagnosticListeners.get(CarDiagnosticManager.FRAME_TYPE_FLAG_FREEZE); |
| 151 | } else { |
| 152 | Log.w( |
| 153 | CarLog.TAG_DIAGNOSTIC, |
| 154 | String.format("received unknown diagnostic event: %s", event)); |
| 155 | continue; |
| 156 | } |
| 157 | |
| 158 | if (null != listeners) { |
| 159 | for (ClientWithRate<DiagnosticClient> clientWithRate : listeners.getClients()) { |
| 160 | DiagnosticClient client = clientWithRate.getClient(); |
| 161 | List<CarDiagnosticEvent> clientEvents = eventsByClient.computeIfAbsent(client, |
| 162 | (DiagnosticClient diagnosticClient) -> new LinkedList<>()); |
| 163 | clientEvents.add(event); |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | mDiagnosticLock.unlock(); |
| 168 | |
| 169 | for (ArrayMap.Entry<CarDiagnosticService.DiagnosticClient, List<CarDiagnosticEvent>> entry : |
| 170 | eventsByClient.entrySet()) { |
| 171 | CarDiagnosticService.DiagnosticClient client = entry.getKey(); |
| 172 | List<CarDiagnosticEvent> clientEvents = entry.getValue(); |
| 173 | |
| 174 | client.dispatchDiagnosticUpdate(clientEvents); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /** Received diagnostic data from car. */ |
| 179 | @Override |
| 180 | public void onDiagnosticEvents(List<CarDiagnosticEvent> events) { |
| 181 | processDiagnosticData(events); |
| 182 | } |
| 183 | |
| 184 | private List<CarDiagnosticEvent> getCachedEventsLocked(int frameType) { |
| 185 | ArrayList<CarDiagnosticEvent> events = new ArrayList<>(); |
| 186 | switch (frameType) { |
| 187 | case CarDiagnosticManager.FRAME_TYPE_FLAG_LIVE: |
| 188 | mLiveFrameDiagnosticRecord.lock(); |
| 189 | events.add(mLiveFrameDiagnosticRecord.getLastEvent()); |
| 190 | mLiveFrameDiagnosticRecord.unlock(); |
| 191 | break; |
| 192 | case CarDiagnosticManager.FRAME_TYPE_FLAG_FREEZE: |
| 193 | mFreezeFrameDiagnosticRecords.lock(); |
| 194 | mFreezeFrameDiagnosticRecords.getEvents().forEach(events::add); |
| 195 | mFreezeFrameDiagnosticRecords.unlock(); |
| 196 | break; |
| 197 | default: break; |
| 198 | } |
| 199 | return events; |
| 200 | } |
| 201 | |
| 202 | private void assertPermission(int frameType) { |
| 203 | if (Binder.getCallingUid() != Process.myUid()) { |
| 204 | switch (getDiagnosticPermission(frameType)) { |
| 205 | case PackageManager.PERMISSION_GRANTED: |
| 206 | break; |
| 207 | default: |
| 208 | throw new SecurityException( |
| 209 | "client does not have permission:" |
| 210 | + getPermissionName(frameType) |
| 211 | + " pid:" |
| 212 | + Binder.getCallingPid() |
| 213 | + " uid:" |
| 214 | + Binder.getCallingUid()); |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | @Override |
| 220 | public boolean registerOrUpdateDiagnosticListener(int frameType, int rate, |
| 221 | ICarDiagnosticEventListener listener) { |
| 222 | boolean shouldStartDiagnostics = false; |
| 223 | CarDiagnosticService.DiagnosticClient diagnosticClient = null; |
| 224 | Integer oldRate = null; |
| 225 | Listeners<DiagnosticClient> diagnosticListeners = null; |
| 226 | mDiagnosticLock.lock(); |
| 227 | try { |
| 228 | assertPermission(frameType); |
| 229 | diagnosticClient = findDiagnosticClientLocked(listener); |
| 230 | Listeners.ClientWithRate<DiagnosticClient> diagnosticClientWithRate = null; |
| 231 | if (diagnosticClient == null) { |
| 232 | diagnosticClient = new DiagnosticClient(listener); |
| 233 | try { |
| 234 | listener.asBinder().linkToDeath(diagnosticClient, 0); |
| 235 | } catch (RemoteException e) { |
| 236 | Log.w( |
| 237 | CarLog.TAG_DIAGNOSTIC, |
| 238 | String.format( |
| 239 | "received RemoteException trying to register listener for %s", |
| 240 | frameType)); |
| 241 | return false; |
| 242 | } |
| 243 | mClients.add(diagnosticClient); |
| 244 | } |
| 245 | // If we have a cached event for this diagnostic, send the event. |
| 246 | diagnosticClient.dispatchDiagnosticUpdate(getCachedEventsLocked(frameType)); |
| 247 | diagnosticListeners = mDiagnosticListeners.get(frameType); |
| 248 | if (diagnosticListeners == null) { |
| 249 | diagnosticListeners = new Listeners<>(rate); |
| 250 | mDiagnosticListeners.put(frameType, diagnosticListeners); |
| 251 | shouldStartDiagnostics = true; |
| 252 | } else { |
| 253 | oldRate = diagnosticListeners.getRate(); |
| 254 | diagnosticClientWithRate = |
| 255 | diagnosticListeners.findClientWithRate(diagnosticClient); |
| 256 | } |
| 257 | if (diagnosticClientWithRate == null) { |
| 258 | diagnosticClientWithRate = |
| 259 | new ClientWithRate<>(diagnosticClient, rate); |
| 260 | diagnosticListeners.addClientWithRate(diagnosticClientWithRate); |
| 261 | } else { |
| 262 | diagnosticClientWithRate.setRate(rate); |
| 263 | } |
| 264 | if (diagnosticListeners.getRate() > rate) { |
| 265 | diagnosticListeners.setRate(rate); |
| 266 | shouldStartDiagnostics = true; |
| 267 | } |
| 268 | diagnosticClient.addDiagnostic(frameType); |
| 269 | } finally { |
| 270 | mDiagnosticLock.unlock(); |
| 271 | } |
| 272 | Log.i( |
| 273 | CarLog.TAG_DIAGNOSTIC, |
| 274 | String.format( |
| 275 | "shouldStartDiagnostics = %s for %s at rate %d", |
| 276 | shouldStartDiagnostics, frameType, rate)); |
| 277 | // start diagnostic outside lock as it can take time. |
| 278 | if (shouldStartDiagnostics) { |
| 279 | if (!startDiagnostic(frameType, rate)) { |
| 280 | // failed. so remove from active diagnostic list. |
| 281 | Log.w(CarLog.TAG_DIAGNOSTIC, "startDiagnostic failed"); |
| 282 | mDiagnosticLock.lock(); |
| 283 | try { |
| 284 | diagnosticClient.removeDiagnostic(frameType); |
| 285 | if (oldRate != null) { |
| 286 | diagnosticListeners.setRate(oldRate); |
| 287 | } else { |
| 288 | mDiagnosticListeners.remove(frameType); |
| 289 | } |
| 290 | } finally { |
| 291 | mDiagnosticLock.unlock(); |
| 292 | } |
| 293 | return false; |
| 294 | } |
| 295 | } |
| 296 | return true; |
| 297 | } |
| 298 | |
| 299 | //TODO(egranata): handle permissions correctly |
| 300 | private int getDiagnosticPermission(int frameType) { |
| 301 | String permission = getPermissionName(frameType); |
| 302 | int result = PackageManager.PERMISSION_GRANTED; |
| 303 | if (permission != null) { |
| 304 | return mContext.checkCallingOrSelfPermission(permission); |
| 305 | } |
| 306 | // If no permission is required, return granted. |
| 307 | return result; |
| 308 | } |
| 309 | |
| 310 | private String getPermissionName(int frameType) { |
| 311 | return null; |
| 312 | } |
| 313 | |
| 314 | private boolean startDiagnostic(int frameType, int rate) { |
| 315 | Log.i(CarLog.TAG_DIAGNOSTIC, String.format("starting diagnostic %s at rate %d", |
| 316 | frameType, rate)); |
| 317 | DiagnosticHalService diagnosticHal = getDiagnosticHal(); |
| 318 | if (diagnosticHal != null) { |
| 319 | if (!diagnosticHal.isReady()) { |
| 320 | Log.w(CarLog.TAG_DIAGNOSTIC, "diagnosticHal not ready"); |
| 321 | return false; |
| 322 | } |
| 323 | switch (frameType) { |
| 324 | case CarDiagnosticManager.FRAME_TYPE_FLAG_LIVE: |
| 325 | if (mLiveFrameDiagnosticRecord.isEnabled()) { |
| 326 | return true; |
| 327 | } |
| 328 | if (diagnosticHal.requestSensorStart(CarDiagnosticManager.FRAME_TYPE_FLAG_LIVE, |
| 329 | rate)) { |
| 330 | mLiveFrameDiagnosticRecord.enable(); |
| 331 | return true; |
| 332 | } |
| 333 | break; |
| 334 | case CarDiagnosticManager.FRAME_TYPE_FLAG_FREEZE: |
| 335 | if (mFreezeFrameDiagnosticRecords.isEnabled()) { |
| 336 | return true; |
| 337 | } |
| 338 | if (diagnosticHal.requestSensorStart(CarDiagnosticManager.FRAME_TYPE_FLAG_FREEZE, |
| 339 | rate)) { |
| 340 | mFreezeFrameDiagnosticRecords.enable(); |
| 341 | return true; |
| 342 | } |
| 343 | break; |
| 344 | } |
| 345 | } |
| 346 | return false; |
| 347 | } |
| 348 | |
| 349 | @Override |
| 350 | public void unregisterDiagnosticListener( |
| 351 | int frameType, ICarDiagnosticEventListener listener) { |
| 352 | boolean shouldStopDiagnostic = false; |
| 353 | boolean shouldRestartDiagnostic = false; |
| 354 | int newRate = 0; |
| 355 | mDiagnosticLock.lock(); |
| 356 | try { |
| 357 | DiagnosticClient diagnosticClient = findDiagnosticClientLocked(listener); |
| 358 | if (diagnosticClient == null) { |
| 359 | Log.i( |
| 360 | CarLog.TAG_DIAGNOSTIC, |
| 361 | String.format( |
| 362 | "trying to unregister diagnostic client %s for %s which is not registered", |
| 363 | listener, frameType)); |
| 364 | // never registered or already unregistered. |
| 365 | return; |
| 366 | } |
| 367 | diagnosticClient.removeDiagnostic(frameType); |
| 368 | if (diagnosticClient.getNumberOfActiveDiagnostic() == 0) { |
| 369 | diagnosticClient.release(); |
| 370 | mClients.remove(diagnosticClient); |
| 371 | } |
| 372 | Listeners<DiagnosticClient> diagnosticListeners = mDiagnosticListeners.get(frameType); |
| 373 | if (diagnosticListeners == null) { |
| 374 | // diagnostic not active |
| 375 | return; |
| 376 | } |
| 377 | ClientWithRate<DiagnosticClient> clientWithRate = |
| 378 | diagnosticListeners.findClientWithRate(diagnosticClient); |
| 379 | if (clientWithRate == null) { |
| 380 | return; |
| 381 | } |
| 382 | diagnosticListeners.removeClientWithRate(clientWithRate); |
| 383 | if (diagnosticListeners.getNumberOfClients() == 0) { |
| 384 | shouldStopDiagnostic = true; |
| 385 | mDiagnosticListeners.remove(frameType); |
| 386 | } else if (diagnosticListeners.updateRate()) { // rate changed |
| 387 | newRate = diagnosticListeners.getRate(); |
| 388 | shouldRestartDiagnostic = true; |
| 389 | } |
| 390 | } finally { |
| 391 | mDiagnosticLock.unlock(); |
| 392 | } |
| 393 | Log.i( |
| 394 | CarLog.TAG_DIAGNOSTIC, |
| 395 | String.format( |
| 396 | "shouldStopDiagnostic = %s, shouldRestartDiagnostic = %s for type %s", |
| 397 | shouldStopDiagnostic, shouldRestartDiagnostic, frameType)); |
| 398 | if (shouldStopDiagnostic) { |
| 399 | stopDiagnostic(frameType); |
| 400 | } else if (shouldRestartDiagnostic) { |
| 401 | startDiagnostic(frameType, newRate); |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | private void stopDiagnostic(int frameType) { |
| 406 | DiagnosticHalService diagnosticHal = getDiagnosticHal(); |
| 407 | if (diagnosticHal == null || !diagnosticHal.isReady()) { |
| 408 | Log.w(CarLog.TAG_DIAGNOSTIC, "diagnosticHal not ready"); |
| 409 | return; |
| 410 | } |
| 411 | switch (frameType) { |
| 412 | case CarDiagnosticManager.FRAME_TYPE_FLAG_LIVE: |
| 413 | if (mLiveFrameDiagnosticRecord.disableIfNeeded()) |
| 414 | diagnosticHal.requestSensorStop(CarDiagnosticManager.FRAME_TYPE_FLAG_LIVE); |
| 415 | break; |
| 416 | case CarDiagnosticManager.FRAME_TYPE_FLAG_FREEZE: |
| 417 | if (mFreezeFrameDiagnosticRecords.disableIfNeeded()) |
| 418 | diagnosticHal.requestSensorStop(CarDiagnosticManager.FRAME_TYPE_FLAG_FREEZE); |
| 419 | break; |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | private DiagnosticHalService getDiagnosticHal() { |
| 424 | return mDiagnosticHal; |
| 425 | } |
| 426 | |
| 427 | // ICarDiagnostic implementations |
| 428 | |
| 429 | @Override |
| 430 | public CarDiagnosticEvent getLatestLiveFrame() { |
| 431 | mLiveFrameDiagnosticRecord.lock(); |
| 432 | CarDiagnosticEvent liveFrame = mLiveFrameDiagnosticRecord.getLastEvent(); |
| 433 | mLiveFrameDiagnosticRecord.unlock(); |
| 434 | return liveFrame; |
| 435 | } |
| 436 | |
| 437 | @Override |
| 438 | public long[] getFreezeFrameTimestamps() { |
| 439 | mFreezeFrameDiagnosticRecords.lock(); |
| 440 | long[] timestamps = mFreezeFrameDiagnosticRecords.getFreezeFrameTimestamps(); |
| 441 | mFreezeFrameDiagnosticRecords.unlock(); |
| 442 | return timestamps; |
| 443 | } |
| 444 | |
| 445 | @Override |
| 446 | @Nullable |
| 447 | public CarDiagnosticEvent getFreezeFrame(long timestamp) { |
| 448 | mFreezeFrameDiagnosticRecords.lock(); |
| 449 | CarDiagnosticEvent freezeFrame = mFreezeFrameDiagnosticRecords.getEvent(timestamp); |
| 450 | mFreezeFrameDiagnosticRecords.unlock(); |
| 451 | return freezeFrame; |
| 452 | } |
| 453 | |
| 454 | @Override |
| 455 | public boolean clearFreezeFrames(long... timestamps) { |
| 456 | mFreezeFrameDiagnosticRecords.lock(); |
| 457 | mDiagnosticHal.clearFreezeFrames(timestamps); |
| 458 | mFreezeFrameDiagnosticRecords.clearEvents(); |
| 459 | mFreezeFrameDiagnosticRecords.unlock(); |
| 460 | return true; |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * Find DiagnosticClient from client list and return it. This should be called with mClients |
| 465 | * locked. |
| 466 | * |
| 467 | * @param listener |
| 468 | * @return null if not found. |
| 469 | */ |
| 470 | private CarDiagnosticService.DiagnosticClient findDiagnosticClientLocked( |
| 471 | ICarDiagnosticEventListener listener) { |
| 472 | IBinder binder = listener.asBinder(); |
| 473 | for (DiagnosticClient diagnosticClient : mClients) { |
| 474 | if (diagnosticClient.isHoldingListenerBinder(binder)) { |
| 475 | return diagnosticClient; |
| 476 | } |
| 477 | } |
| 478 | return null; |
| 479 | } |
| 480 | |
| 481 | private void removeClient(DiagnosticClient diagnosticClient) { |
| 482 | mDiagnosticLock.lock(); |
| 483 | try { |
| 484 | for (int diagnostic : diagnosticClient.getDiagnosticArray()) { |
| 485 | unregisterDiagnosticListener( |
| 486 | diagnostic, diagnosticClient.getICarDiagnosticEventListener()); |
| 487 | } |
| 488 | mClients.remove(diagnosticClient); |
| 489 | } finally { |
| 490 | mDiagnosticLock.unlock(); |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | private class DiagnosticDispatchHandler extends Handler { |
| 495 | private static final long DIAGNOSTIC_DISPATCH_MIN_INTERVAL_MS = 16; // over 60Hz |
| 496 | |
| 497 | private static final int MSG_DIAGNOSTIC_DATA = 0; |
| 498 | |
| 499 | private long mLastDiagnosticDispatchTime = -1; |
| 500 | private int mFreeListIndex = 0; |
| 501 | private final LinkedList<CarDiagnosticEvent>[] mDiagnosticDataList = new LinkedList[2]; |
| 502 | |
| 503 | private DiagnosticDispatchHandler(Looper looper) { |
| 504 | super(looper); |
| 505 | for (int i = 0; i < mDiagnosticDataList.length; i++) { |
| 506 | mDiagnosticDataList[i] = new LinkedList<CarDiagnosticEvent>(); |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | private synchronized void handleDiagnosticEvents(List<CarDiagnosticEvent> data) { |
| 511 | LinkedList<CarDiagnosticEvent> list = mDiagnosticDataList[mFreeListIndex]; |
| 512 | list.addAll(data); |
| 513 | requestDispatchLocked(); |
| 514 | } |
| 515 | |
| 516 | private synchronized void handleDiagnosticEvent(CarDiagnosticEvent event) { |
| 517 | LinkedList<CarDiagnosticEvent> list = mDiagnosticDataList[mFreeListIndex]; |
| 518 | list.add(event); |
| 519 | requestDispatchLocked(); |
| 520 | } |
| 521 | |
| 522 | private void requestDispatchLocked() { |
| 523 | Message msg = obtainMessage(MSG_DIAGNOSTIC_DATA); |
| 524 | long now = SystemClock.uptimeMillis(); |
| 525 | long delta = now - mLastDiagnosticDispatchTime; |
| 526 | if (delta > DIAGNOSTIC_DISPATCH_MIN_INTERVAL_MS) { |
| 527 | sendMessage(msg); |
| 528 | } else { |
| 529 | sendMessageDelayed(msg, DIAGNOSTIC_DISPATCH_MIN_INTERVAL_MS - delta); |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | @Override |
| 534 | public void handleMessage(Message msg) { |
| 535 | switch (msg.what) { |
| 536 | case MSG_DIAGNOSTIC_DATA: |
| 537 | doHandleDiagnosticData(); |
| 538 | break; |
| 539 | default: |
| 540 | break; |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | private void doHandleDiagnosticData() { |
| 545 | List<CarDiagnosticEvent> listToDispatch = null; |
| 546 | synchronized (this) { |
| 547 | mLastDiagnosticDispatchTime = SystemClock.uptimeMillis(); |
| 548 | int nonFreeListIndex = mFreeListIndex ^ 0x1; |
| 549 | List<CarDiagnosticEvent> nonFreeList = mDiagnosticDataList[nonFreeListIndex]; |
| 550 | List<CarDiagnosticEvent> freeList = mDiagnosticDataList[mFreeListIndex]; |
| 551 | if (nonFreeList.size() > 0) { |
| 552 | // copy again, but this should not be normal case |
| 553 | nonFreeList.addAll(freeList); |
| 554 | listToDispatch = nonFreeList; |
| 555 | freeList.clear(); |
| 556 | } else if (freeList.size() > 0) { |
| 557 | listToDispatch = freeList; |
| 558 | mFreeListIndex = nonFreeListIndex; |
| 559 | } |
| 560 | } |
| 561 | // leave this part outside lock so that time-taking dispatching can be done without |
| 562 | // blocking diagnostic event notification. |
| 563 | if (listToDispatch != null) { |
| 564 | processDiagnosticData(listToDispatch); |
| 565 | listToDispatch.clear(); |
| 566 | } |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | /** internal instance for pending client request */ |
| 571 | private class DiagnosticClient implements Listeners.IListener { |
| 572 | /** callback for diagnostic events */ |
| 573 | private final ICarDiagnosticEventListener mListener; |
| 574 | |
| 575 | private final Set<Integer> mActiveDiagnostics = new HashSet<>(); |
| 576 | |
| 577 | /** when false, it is already released */ |
| 578 | private volatile boolean mActive = true; |
| 579 | |
| 580 | DiagnosticClient(ICarDiagnosticEventListener listener) { |
| 581 | this.mListener = listener; |
| 582 | } |
| 583 | |
| 584 | @Override |
| 585 | public boolean equals(Object o) { |
| 586 | if (o instanceof CarDiagnosticService.DiagnosticClient |
| 587 | && mListener.asBinder() |
| 588 | == ((CarDiagnosticService.DiagnosticClient) o).mListener.asBinder()) { |
| 589 | return true; |
| 590 | } |
| 591 | return false; |
| 592 | } |
| 593 | |
| 594 | boolean isHoldingListenerBinder(IBinder listenerBinder) { |
| 595 | return mListener.asBinder() == listenerBinder; |
| 596 | } |
| 597 | |
| 598 | void addDiagnostic(int frameType) { |
| 599 | mActiveDiagnostics.add(frameType); |
| 600 | } |
| 601 | |
| 602 | void removeDiagnostic(int frameType) { |
| 603 | mActiveDiagnostics.remove(frameType); |
| 604 | } |
| 605 | |
| 606 | int getNumberOfActiveDiagnostic() { |
| 607 | return mActiveDiagnostics.size(); |
| 608 | } |
| 609 | |
| 610 | int[] getDiagnosticArray() { |
| 611 | return mActiveDiagnostics.stream().mapToInt(Integer::intValue).toArray(); |
| 612 | } |
| 613 | |
| 614 | ICarDiagnosticEventListener getICarDiagnosticEventListener() { |
| 615 | return mListener; |
| 616 | } |
| 617 | |
| 618 | /** Client dead. should remove all diagnostic requests from client */ |
| 619 | @Override |
| 620 | public void binderDied() { |
| 621 | mListener.asBinder().unlinkToDeath(this, 0); |
| 622 | removeClient(this); |
| 623 | } |
| 624 | |
| 625 | void dispatchDiagnosticUpdate(List<CarDiagnosticEvent> events) { |
| 626 | if (events.size() == 0) { |
| 627 | return; |
| 628 | } |
| 629 | if (mActive) { |
| 630 | try { |
| 631 | mListener.onDiagnosticEvents(events); |
| 632 | } catch (RemoteException e) { |
| 633 | //ignore. crash will be handled by death handler |
| 634 | } |
| 635 | } else { |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | @Override |
| 640 | public void release() { |
| 641 | if (mActive) { |
| 642 | mListener.asBinder().unlinkToDeath(this, 0); |
| 643 | mActiveDiagnostics.clear(); |
| 644 | mActive = false; |
| 645 | } |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | private static abstract class DiagnosticRecord { |
| 650 | private final ReentrantLock mLock; |
| 651 | protected boolean mEnabled = false; |
| 652 | |
| 653 | DiagnosticRecord(ReentrantLock lock) { |
| 654 | mLock = lock; |
| 655 | } |
| 656 | |
| 657 | void lock() { |
| 658 | mLock.lock(); |
| 659 | } |
| 660 | |
| 661 | void unlock() { |
| 662 | mLock.unlock(); |
| 663 | } |
| 664 | |
| 665 | boolean isEnabled() { |
| 666 | return mEnabled; |
| 667 | } |
| 668 | |
| 669 | void enable() { |
| 670 | mEnabled = true; |
| 671 | } |
| 672 | |
| 673 | abstract boolean disableIfNeeded(); |
| 674 | abstract CarDiagnosticEvent update(CarDiagnosticEvent newEvent); |
| 675 | } |
| 676 | |
| 677 | private static class LiveFrameRecord extends DiagnosticRecord { |
| 678 | /** Store the most recent live-frame. */ |
| 679 | CarDiagnosticEvent mLastEvent = null; |
| 680 | |
| 681 | LiveFrameRecord(ReentrantLock lock) { |
| 682 | super(lock); |
| 683 | } |
| 684 | |
| 685 | @Override |
| 686 | boolean disableIfNeeded() { |
| 687 | if (!mEnabled) return false; |
| 688 | mEnabled = false; |
| 689 | mLastEvent = null; |
| 690 | return true; |
| 691 | } |
| 692 | |
| 693 | @Override |
| 694 | CarDiagnosticEvent update(CarDiagnosticEvent newEvent) { |
| 695 | newEvent = Objects.requireNonNull(newEvent); |
| 696 | if((null == mLastEvent) || mLastEvent.isEarlierThan(newEvent)) |
| 697 | mLastEvent = newEvent; |
| 698 | return mLastEvent; |
| 699 | } |
| 700 | |
| 701 | CarDiagnosticEvent getLastEvent() { |
| 702 | return mLastEvent; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | private static class FreezeFrameRecord extends DiagnosticRecord { |
| 707 | /** Store the timestamp --> freeze frame mapping. */ |
| 708 | HashMap<Long, CarDiagnosticEvent> mEvents = new HashMap<>(); |
| 709 | |
| 710 | FreezeFrameRecord(ReentrantLock lock) { |
| 711 | super(lock); |
| 712 | } |
| 713 | |
| 714 | @Override |
| 715 | boolean disableIfNeeded() { |
| 716 | if (!mEnabled) return false; |
| 717 | mEnabled = false; |
| 718 | clearEvents(); |
| 719 | return true; |
| 720 | } |
| 721 | |
| 722 | void clearEvents() { |
| 723 | mEvents.clear(); |
| 724 | } |
| 725 | |
| 726 | @Override |
| 727 | CarDiagnosticEvent update(CarDiagnosticEvent newEvent) { |
| 728 | mEvents.put(newEvent.timestamp, newEvent); |
| 729 | return newEvent; |
| 730 | } |
| 731 | |
| 732 | long[] getFreezeFrameTimestamps() { |
| 733 | return mEvents.keySet().stream().mapToLong(Long::longValue).toArray(); |
| 734 | } |
| 735 | |
| 736 | CarDiagnosticEvent getEvent(long timestamp) { |
| 737 | return mEvents.get(timestamp); |
| 738 | } |
| 739 | |
| 740 | Iterable<CarDiagnosticEvent> getEvents() { |
| 741 | return mEvents.values(); |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | @Override |
| 746 | public void dump(PrintWriter writer) { |
| 747 | writer.println("*CarDiagnosticService*"); |
| 748 | writer.println("**last events for diagnostics**"); |
| 749 | if (null != mLiveFrameDiagnosticRecord.getLastEvent()) { |
| 750 | writer.println("last live frame event: "); |
| 751 | writer.println(mLiveFrameDiagnosticRecord.getLastEvent()); |
| 752 | } |
| 753 | writer.println("freeze frame events: "); |
| 754 | mFreezeFrameDiagnosticRecords.getEvents().forEach(writer::println); |
| 755 | writer.println("**clients**"); |
| 756 | try { |
| 757 | for (DiagnosticClient client : mClients) { |
| 758 | if (client != null) { |
| 759 | try { |
| 760 | writer.println( |
| 761 | "binder:" |
| 762 | + client.mListener |
| 763 | + " active diagnostics:" |
| 764 | + Arrays.toString(client.getDiagnosticArray())); |
| 765 | } catch (ConcurrentModificationException e) { |
| 766 | writer.println("concurrent modification happened"); |
| 767 | } |
| 768 | } else { |
| 769 | writer.println("null client"); |
| 770 | } |
| 771 | } |
| 772 | } catch (ConcurrentModificationException e) { |
| 773 | writer.println("concurrent modification happened"); |
| 774 | } |
| 775 | writer.println("**diagnostic listeners**"); |
| 776 | try { |
| 777 | for (int diagnostic : mDiagnosticListeners.keySet()) { |
| 778 | Listeners diagnosticListeners = mDiagnosticListeners.get(diagnostic); |
| 779 | if (diagnosticListeners != null) { |
| 780 | writer.println( |
| 781 | " Diagnostic:" |
| 782 | + diagnostic |
| 783 | + " num client:" |
| 784 | + diagnosticListeners.getNumberOfClients() |
| 785 | + " rate:" |
| 786 | + diagnosticListeners.getRate()); |
| 787 | } |
| 788 | } |
| 789 | } catch (ConcurrentModificationException e) { |
| 790 | writer.println("concurrent modification happened"); |
| 791 | } |
| 792 | } |
| 793 | } |