Svetoslav Ganov | a002715 | 2013-06-25 14:59:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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.server.print; |
| 18 | |
| 19 | import android.content.ComponentName; |
| 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.content.ServiceConnection; |
| 23 | import android.os.Binder; |
| 24 | import android.os.IBinder; |
| 25 | import android.os.ParcelFileDescriptor; |
| 26 | import android.os.RemoteException; |
| 27 | import android.os.SystemClock; |
| 28 | import android.os.UserHandle; |
| 29 | import android.print.IPrintClient; |
| 30 | import android.print.IPrintDocumentAdapter; |
| 31 | import android.print.IPrintSpooler; |
| 32 | import android.print.IPrintSpoolerCallbacks; |
| 33 | import android.print.IPrintSpoolerClient; |
| 34 | import android.print.IPrinterDiscoveryObserver; |
| 35 | import android.print.PrintAttributes; |
| 36 | import android.print.PrintJobInfo; |
| 37 | import android.util.Slog; |
| 38 | import android.util.TimedRemoteCaller; |
| 39 | |
| 40 | import libcore.io.IoUtils; |
| 41 | |
| 42 | import java.lang.ref.WeakReference; |
| 43 | import java.util.List; |
| 44 | import java.util.concurrent.TimeoutException; |
| 45 | |
| 46 | /** |
| 47 | * This represents the remote print spooler as a local object to the |
| 48 | * PrintManagerSerivce. It is responsible to connecting to the remote |
| 49 | * spooler if needed, to make the timed remote calls, to handle |
| 50 | * remote exceptions, and to bind/unbind to the remote instance as |
| 51 | * needed. |
| 52 | */ |
| 53 | final class RemotePrintSpooler { |
| 54 | |
| 55 | private static final String LOG_TAG = "RemotePrintSpooler"; |
| 56 | |
| 57 | private static final boolean DEBUG = true; |
| 58 | |
| 59 | private static final long BIND_SPOOLER_SERVICE_TIMEOUT = 10000; |
| 60 | |
| 61 | private final Object mLock = new Object(); |
| 62 | |
| 63 | private final GetPrintJobInfosCaller mGetPrintJobInfosCaller = new GetPrintJobInfosCaller(); |
| 64 | |
| 65 | private final CreatePrintJobCaller mCreatePrintJobCaller = new CreatePrintJobCaller(); |
| 66 | |
| 67 | private final CancelPrintJobCaller mCancelPrintJobCaller = new CancelPrintJobCaller(); |
| 68 | |
| 69 | private final GetPrintJobInfoCaller mGetPrintJobInfoCaller = new GetPrintJobInfoCaller(); |
| 70 | |
| 71 | private final SetPrintJobStateCaller mSetPrintJobStatusCaller = new SetPrintJobStateCaller(); |
| 72 | |
| 73 | private final SetPrintJobTagCaller mSetPrintJobTagCaller = new SetPrintJobTagCaller(); |
| 74 | |
| 75 | private final ServiceConnection mServiceConnection = new MyServiceConnection(); |
| 76 | |
| 77 | private final Context mContext; |
| 78 | |
| 79 | private final UserHandle mUserHandle; |
| 80 | |
| 81 | private final PrintSpoolerClient mClient; |
| 82 | |
| 83 | private final Intent mIntent; |
| 84 | |
| 85 | private final PrintSpoolerCallbacks mCallbacks; |
| 86 | |
| 87 | private IPrintSpooler mRemoteInstance; |
| 88 | |
| 89 | private boolean mDestroyed; |
| 90 | |
| 91 | public static interface PrintSpoolerCallbacks { |
| 92 | public void onPrintJobQueued(PrintJobInfo printJob); |
| 93 | public void onStartPrinterDiscovery(IPrinterDiscoveryObserver observer); |
| 94 | public void onStopPrinterDiscovery(); |
| 95 | public void onAllPrintJobsForServiceHandled(ComponentName printService); |
| 96 | } |
| 97 | |
| 98 | public RemotePrintSpooler(Context context, int userId, |
| 99 | PrintSpoolerCallbacks callbacks) { |
| 100 | mContext = context; |
| 101 | mUserHandle = new UserHandle(userId); |
| 102 | mCallbacks = callbacks; |
| 103 | mClient = new PrintSpoolerClient(this); |
| 104 | mIntent = new Intent(); |
| 105 | mIntent.setComponent(new ComponentName("com.android.printspooler", |
| 106 | "com.android.printspooler.PrintSpoolerService")); |
| 107 | } |
| 108 | |
| 109 | public final List<PrintJobInfo> getPrintJobInfos(ComponentName componentName, int state, |
| 110 | int appId) { |
| 111 | throwIfCalledOnMainThread(); |
| 112 | synchronized (mLock) { |
| 113 | throwIfDestroyedLocked(); |
| 114 | } |
| 115 | if (DEBUG) { |
| 116 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] getPrintJobInfos()"); |
| 117 | } |
| 118 | try { |
| 119 | return mGetPrintJobInfosCaller.getPrintJobInfos(getRemoteInstanceLazy(), |
| 120 | componentName, state, appId); |
| 121 | } catch (RemoteException re) { |
| 122 | Slog.e(LOG_TAG, "Error getting print jobs.", re); |
| 123 | } catch (TimeoutException te) { |
| 124 | Slog.e(LOG_TAG, "Error getting print jobs.", te); |
| 125 | } |
| 126 | return null; |
| 127 | } |
| 128 | |
| 129 | public final PrintJobInfo createPrintJob(String printJobName, IPrintClient client, |
| 130 | IPrintDocumentAdapter documentAdapter, PrintAttributes attributes, int appId) { |
| 131 | throwIfCalledOnMainThread(); |
| 132 | synchronized (mLock) { |
| 133 | throwIfDestroyedLocked(); |
| 134 | } |
| 135 | if (DEBUG) { |
| 136 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] createPrintJob()"); |
| 137 | } |
| 138 | try { |
| 139 | return mCreatePrintJobCaller.createPrintJob(getRemoteInstanceLazy(), |
| 140 | printJobName, client, documentAdapter, attributes, appId); |
| 141 | } catch (RemoteException re) { |
| 142 | Slog.e(LOG_TAG, "Error creating print job.", re); |
| 143 | } catch (TimeoutException te) { |
| 144 | Slog.e(LOG_TAG, "Error creating print job.", te); |
| 145 | } |
| 146 | return null; |
| 147 | } |
| 148 | |
| 149 | public final boolean cancelPrintJob(int printJobId, int appId) { |
| 150 | throwIfCalledOnMainThread(); |
| 151 | synchronized (mLock) { |
| 152 | throwIfDestroyedLocked(); |
| 153 | } |
| 154 | if (DEBUG) { |
| 155 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] cancelPrintJob()"); |
| 156 | } |
| 157 | try { |
| 158 | return mCancelPrintJobCaller.cancelPrintJob(getRemoteInstanceLazy(), |
| 159 | printJobId, appId); |
| 160 | } catch (RemoteException re) { |
| 161 | Slog.e(LOG_TAG, "Error canceling print job.", re); |
| 162 | } catch (TimeoutException te) { |
| 163 | Slog.e(LOG_TAG, "Error canceling print job.", te); |
| 164 | } |
| 165 | return false; |
| 166 | } |
| 167 | |
| 168 | public final void writePrintJobData(ParcelFileDescriptor fd, int printJobId) { |
| 169 | throwIfCalledOnMainThread(); |
| 170 | synchronized (mLock) { |
| 171 | throwIfDestroyedLocked(); |
| 172 | } |
| 173 | if (DEBUG) { |
| 174 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] writePrintJobData()"); |
| 175 | } |
| 176 | try { |
| 177 | getRemoteInstanceLazy().writePrintJobData(fd, printJobId); |
| 178 | } catch (RemoteException re) { |
| 179 | Slog.e(LOG_TAG, "Error writing print job data.", re); |
| 180 | } catch (TimeoutException te) { |
| 181 | Slog.e(LOG_TAG, "Error writing print job data.", te); |
| 182 | } finally { |
| 183 | // We passed the file descriptor across and now the other |
| 184 | // side is responsible to close it, so close the local copy. |
| 185 | IoUtils.closeQuietly(fd); |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | public final PrintJobInfo getPrintJobInfo(int printJobId, int appId) { |
| 190 | throwIfCalledOnMainThread(); |
| 191 | synchronized (mLock) { |
| 192 | throwIfDestroyedLocked(); |
| 193 | } |
| 194 | if (DEBUG) { |
| 195 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] getPrintJobInfo()"); |
| 196 | } |
| 197 | try { |
| 198 | return mGetPrintJobInfoCaller.getPrintJobInfo(getRemoteInstanceLazy(), |
| 199 | printJobId, appId); |
| 200 | } catch (RemoteException re) { |
| 201 | Slog.e(LOG_TAG, "Error getting print job info.", re); |
| 202 | } catch (TimeoutException te) { |
| 203 | Slog.e(LOG_TAG, "Error getting print job info.", te); |
| 204 | } |
| 205 | return null; |
| 206 | } |
| 207 | |
| 208 | public final boolean setPrintJobState(int printJobId, int state) { |
| 209 | throwIfCalledOnMainThread(); |
| 210 | synchronized (mLock) { |
| 211 | throwIfDestroyedLocked(); |
| 212 | } |
| 213 | if (DEBUG) { |
| 214 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] setPrintJobState()"); |
| 215 | } |
| 216 | try { |
| 217 | return mSetPrintJobStatusCaller.setPrintJobState(getRemoteInstanceLazy(), |
| 218 | printJobId, state); |
| 219 | } catch (RemoteException re) { |
| 220 | Slog.e(LOG_TAG, "Error setting print job state.", re); |
| 221 | } catch (TimeoutException te) { |
| 222 | Slog.e(LOG_TAG, "Error setting print job state.", te); |
| 223 | } |
| 224 | return false; |
| 225 | } |
| 226 | |
| 227 | public final boolean setPrintJobTag(int printJobId, String tag) { |
| 228 | throwIfCalledOnMainThread(); |
| 229 | synchronized (mLock) { |
| 230 | throwIfDestroyedLocked(); |
| 231 | } |
| 232 | if (DEBUG) { |
| 233 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] setPrintJobTag()"); |
| 234 | } |
| 235 | try { |
| 236 | return mSetPrintJobTagCaller.setPrintJobTag(getRemoteInstanceLazy(), |
| 237 | printJobId, tag); |
| 238 | } catch (RemoteException re) { |
| 239 | Slog.e(LOG_TAG, "Error setting print job tag.", re); |
| 240 | } catch (TimeoutException te) { |
| 241 | Slog.e(LOG_TAG, "Error setting print job tag.", te); |
| 242 | } |
| 243 | return false; |
| 244 | } |
| 245 | |
| 246 | public final void notifyClientForActivteJobs() { |
| 247 | throwIfCalledOnMainThread(); |
| 248 | synchronized (mLock) { |
| 249 | throwIfDestroyedLocked(); |
| 250 | } |
| 251 | if (DEBUG) { |
| 252 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() |
| 253 | + "] notifyClientForActivteJobs()"); |
| 254 | } |
| 255 | try { |
| 256 | getRemoteInstanceLazy().notifyClientForActivteJobs(); |
| 257 | } catch (RemoteException re) { |
| 258 | Slog.e(LOG_TAG, "Error asking for active print job notification.", re); |
| 259 | } catch (TimeoutException te) { |
| 260 | Slog.e(LOG_TAG, "Error asking for active print job notification.", te); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | public final void destroy() { |
| 265 | throwIfCalledOnMainThread(); |
| 266 | if (DEBUG) { |
| 267 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] destroy()"); |
| 268 | } |
| 269 | synchronized (mLock) { |
| 270 | throwIfDestroyedLocked(); |
| 271 | unbindLocked(); |
| 272 | mDestroyed = true; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | private void onAllPrintJobsHandled() { |
| 277 | synchronized (mLock) { |
| 278 | throwIfDestroyedLocked(); |
| 279 | unbindLocked(); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | private IPrintSpooler getRemoteInstanceLazy() throws TimeoutException { |
| 284 | synchronized (mLock) { |
| 285 | if (mRemoteInstance != null) { |
| 286 | return mRemoteInstance; |
| 287 | } |
| 288 | bindLocked(); |
| 289 | return mRemoteInstance; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | private void bindLocked() throws TimeoutException { |
| 294 | if (DEBUG) { |
| 295 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] bindLocked()"); |
| 296 | } |
| 297 | |
| 298 | mContext.bindServiceAsUser(mIntent, mServiceConnection, |
| 299 | Context.BIND_AUTO_CREATE | Context.BIND_ALLOW_OOM_MANAGEMENT, |
| 300 | mUserHandle); |
| 301 | |
| 302 | final long startMillis = SystemClock.uptimeMillis(); |
| 303 | while (true) { |
| 304 | if (mRemoteInstance != null) { |
| 305 | break; |
| 306 | } |
| 307 | final long elapsedMillis = SystemClock.uptimeMillis() - startMillis; |
| 308 | final long remainingMillis = BIND_SPOOLER_SERVICE_TIMEOUT - elapsedMillis; |
| 309 | if (remainingMillis <= 0) { |
| 310 | throw new TimeoutException("Cannot get spooler!"); |
| 311 | } |
| 312 | try { |
| 313 | mLock.wait(remainingMillis); |
| 314 | } catch (InterruptedException ie) { |
| 315 | /* ignore */ |
| 316 | } |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | private void unbindLocked() { |
| 321 | if (DEBUG) { |
| 322 | Slog.i(LOG_TAG, "[user: " + mUserHandle.getIdentifier() + "] unbindLocked()"); |
| 323 | } |
| 324 | clearClientLocked(); |
| 325 | mRemoteInstance = null; |
| 326 | mContext.unbindService(mServiceConnection); |
| 327 | } |
| 328 | |
| 329 | private void setClientLocked() { |
| 330 | try { |
| 331 | mRemoteInstance.setClient(mClient); |
| 332 | } catch (RemoteException re) { |
| 333 | Slog.d(LOG_TAG, "Error setting print spooler client", re); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | private void clearClientLocked() { |
| 338 | try { |
| 339 | mRemoteInstance.setClient(null); |
| 340 | } catch (RemoteException re) { |
| 341 | Slog.d(LOG_TAG, "Error clearing print spooler client", re); |
| 342 | } |
| 343 | |
| 344 | } |
| 345 | |
| 346 | private void throwIfDestroyedLocked() { |
| 347 | if (mDestroyed) { |
| 348 | throw new IllegalStateException("Cannot interact with a destroyed instance."); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | private void throwIfCalledOnMainThread() { |
| 353 | if (Thread.currentThread() == mContext.getMainLooper().getThread()) { |
| 354 | throw new RuntimeException("Cannot invoke on the main thread"); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | private final class MyServiceConnection implements ServiceConnection { |
| 359 | @Override |
| 360 | public void onServiceConnected(ComponentName name, IBinder service) { |
| 361 | synchronized (mLock) { |
| 362 | mRemoteInstance = IPrintSpooler.Stub.asInterface(service); |
| 363 | setClientLocked(); |
| 364 | mLock.notifyAll(); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | @Override |
| 369 | public void onServiceDisconnected(ComponentName name) { |
| 370 | synchronized (mLock) { |
| 371 | clearClientLocked(); |
| 372 | mRemoteInstance = null; |
| 373 | } |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | private static final class GetPrintJobInfosCaller |
| 378 | extends TimedRemoteCaller<List<PrintJobInfo>> { |
| 379 | private final IPrintSpoolerCallbacks mCallback; |
| 380 | |
| 381 | public GetPrintJobInfosCaller() { |
| 382 | super(TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS); |
| 383 | mCallback = new BasePrintSpoolerServiceCallbacks() { |
| 384 | @Override |
| 385 | public void onGetPrintJobInfosResult(List<PrintJobInfo> printJobs, int sequence) { |
| 386 | onRemoteMethodResult(printJobs, sequence); |
| 387 | } |
| 388 | }; |
| 389 | } |
| 390 | |
| 391 | public List<PrintJobInfo> getPrintJobInfos(IPrintSpooler target, |
| 392 | ComponentName componentName, int state, int appId) |
| 393 | throws RemoteException, TimeoutException { |
| 394 | final int sequence = onBeforeRemoteCall(); |
| 395 | target.getPrintJobInfos(mCallback, componentName, state, appId, sequence); |
| 396 | return getResultTimed(sequence); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | private static final class CreatePrintJobCaller extends TimedRemoteCaller<PrintJobInfo> { |
| 401 | private final IPrintSpoolerCallbacks mCallback; |
| 402 | |
| 403 | public CreatePrintJobCaller() { |
| 404 | super(TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS); |
| 405 | mCallback = new BasePrintSpoolerServiceCallbacks() { |
| 406 | @Override |
| 407 | public void onCreatePrintJobResult(PrintJobInfo printJob, int sequence) { |
| 408 | onRemoteMethodResult(printJob, sequence); |
| 409 | } |
| 410 | }; |
| 411 | } |
| 412 | |
| 413 | public PrintJobInfo createPrintJob(IPrintSpooler target, String printJobName, |
| 414 | IPrintClient client, IPrintDocumentAdapter documentAdapter, |
| 415 | PrintAttributes attributes, int appId) throws RemoteException, TimeoutException { |
| 416 | final int sequence = onBeforeRemoteCall(); |
| 417 | target.createPrintJob(printJobName, client, documentAdapter, attributes, |
| 418 | mCallback, appId, sequence); |
| 419 | return getResultTimed(sequence); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | private static final class CancelPrintJobCaller extends TimedRemoteCaller<Boolean> { |
| 424 | private final IPrintSpoolerCallbacks mCallback; |
| 425 | |
| 426 | public CancelPrintJobCaller() { |
| 427 | super(TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS); |
| 428 | mCallback = new BasePrintSpoolerServiceCallbacks() { |
| 429 | @Override |
| 430 | public void onCancelPrintJobResult(boolean canceled, int sequence) { |
| 431 | onRemoteMethodResult(canceled, sequence); |
| 432 | } |
| 433 | }; |
| 434 | } |
| 435 | |
| 436 | public boolean cancelPrintJob(IPrintSpooler target, int printJobId, |
| 437 | int appId) throws RemoteException, TimeoutException { |
| 438 | final int sequence = onBeforeRemoteCall(); |
| 439 | target.cancelPrintJob(printJobId, mCallback, appId, sequence); |
| 440 | return getResultTimed(sequence); |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | private static final class GetPrintJobInfoCaller extends TimedRemoteCaller<PrintJobInfo> { |
| 445 | private final IPrintSpoolerCallbacks mCallback; |
| 446 | |
| 447 | public GetPrintJobInfoCaller() { |
| 448 | super(TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS); |
| 449 | mCallback = new BasePrintSpoolerServiceCallbacks() { |
| 450 | @Override |
| 451 | public void onGetPrintJobInfoResult(PrintJobInfo printJob, int sequence) { |
| 452 | onRemoteMethodResult(printJob, sequence); |
| 453 | } |
| 454 | }; |
| 455 | } |
| 456 | |
| 457 | public PrintJobInfo getPrintJobInfo(IPrintSpooler target, int printJobId, |
| 458 | int appId) throws RemoteException, TimeoutException { |
| 459 | final int sequence = onBeforeRemoteCall(); |
| 460 | target.getPrintJobInfo(printJobId, mCallback, appId, sequence); |
| 461 | return getResultTimed(sequence); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | private static final class SetPrintJobStateCaller extends TimedRemoteCaller<Boolean> { |
| 466 | private final IPrintSpoolerCallbacks mCallback; |
| 467 | |
| 468 | public SetPrintJobStateCaller() { |
| 469 | super(TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS); |
| 470 | mCallback = new BasePrintSpoolerServiceCallbacks() { |
| 471 | @Override |
| 472 | public void onSetPrintJobStateResult(boolean success, int sequence) { |
| 473 | onRemoteMethodResult(success, sequence); |
| 474 | } |
| 475 | }; |
| 476 | } |
| 477 | |
| 478 | public boolean setPrintJobState(IPrintSpooler target, int printJobId, |
| 479 | int status) throws RemoteException, TimeoutException { |
| 480 | final int sequence = onBeforeRemoteCall(); |
| 481 | target.setPrintJobState(printJobId, status, mCallback, sequence); |
| 482 | return getResultTimed(sequence); |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | private static final class SetPrintJobTagCaller extends TimedRemoteCaller<Boolean> { |
| 487 | private final IPrintSpoolerCallbacks mCallback; |
| 488 | |
| 489 | public SetPrintJobTagCaller() { |
| 490 | super(TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS); |
| 491 | mCallback = new BasePrintSpoolerServiceCallbacks() { |
| 492 | @Override |
| 493 | public void onSetPrintJobTagResult(boolean success, int sequence) { |
| 494 | onRemoteMethodResult(success, sequence); |
| 495 | } |
| 496 | }; |
| 497 | } |
| 498 | |
| 499 | public boolean setPrintJobTag(IPrintSpooler target, int printJobId, |
| 500 | String tag) throws RemoteException, TimeoutException { |
| 501 | final int sequence = onBeforeRemoteCall(); |
| 502 | target.setPrintJobTag(printJobId, tag, mCallback, sequence); |
| 503 | return getResultTimed(sequence); |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | private static abstract class BasePrintSpoolerServiceCallbacks |
| 508 | extends IPrintSpoolerCallbacks.Stub { |
| 509 | @Override |
| 510 | public void onGetPrintJobInfosResult(List<PrintJobInfo> printJobIds, int sequence) { |
| 511 | /* do nothing */ |
| 512 | } |
| 513 | |
| 514 | @Override |
| 515 | public void onGetPrintJobInfoResult(PrintJobInfo printJob, int sequence) { |
| 516 | /* do nothing */ |
| 517 | } |
| 518 | |
| 519 | @Override |
| 520 | public void onCreatePrintJobResult(PrintJobInfo printJob, int sequence) { |
| 521 | /* do nothing */ |
| 522 | } |
| 523 | |
| 524 | @Override |
| 525 | public void onCancelPrintJobResult(boolean canceled, int sequence) { |
| 526 | /* do nothing */ |
| 527 | } |
| 528 | |
| 529 | @Override |
| 530 | public void onSetPrintJobStateResult(boolean success, int sequece) { |
| 531 | /* do nothing */ |
| 532 | } |
| 533 | |
| 534 | @Override |
| 535 | public void onSetPrintJobTagResult(boolean success, int sequence) { |
| 536 | /* do nothing */ |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | private static final class PrintSpoolerClient extends IPrintSpoolerClient.Stub { |
| 541 | |
| 542 | private final WeakReference<RemotePrintSpooler> mWeakSpooler; |
| 543 | |
| 544 | public PrintSpoolerClient(RemotePrintSpooler spooler) { |
| 545 | mWeakSpooler = new WeakReference<RemotePrintSpooler>(spooler); |
| 546 | } |
| 547 | |
| 548 | @Override |
| 549 | public void onPrintJobQueued(PrintJobInfo printJob) { |
| 550 | RemotePrintSpooler spooler = mWeakSpooler.get(); |
| 551 | if (spooler != null) { |
| 552 | final long identity = Binder.clearCallingIdentity(); |
| 553 | try { |
| 554 | spooler.mCallbacks.onPrintJobQueued(printJob); |
| 555 | } finally { |
| 556 | Binder.restoreCallingIdentity(identity); |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | @Override |
| 562 | public void onAllPrintJobsForServiceHandled(ComponentName printService) { |
| 563 | RemotePrintSpooler spooler = mWeakSpooler.get(); |
| 564 | if (spooler != null) { |
| 565 | final long identity = Binder.clearCallingIdentity(); |
| 566 | try { |
| 567 | spooler.mCallbacks.onAllPrintJobsForServiceHandled(printService); |
| 568 | } finally { |
| 569 | Binder.restoreCallingIdentity(identity); |
| 570 | } |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | @Override |
| 575 | public void onAllPrintJobsHandled() { |
| 576 | RemotePrintSpooler spooler = mWeakSpooler.get(); |
| 577 | if (spooler != null) { |
| 578 | final long identity = Binder.clearCallingIdentity(); |
| 579 | try { |
| 580 | spooler.onAllPrintJobsHandled(); |
| 581 | } finally { |
| 582 | Binder.restoreCallingIdentity(identity); |
| 583 | } |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | @Override |
| 588 | public void onStartPrinterDiscovery(IPrinterDiscoveryObserver observer) { |
| 589 | RemotePrintSpooler spooler = mWeakSpooler.get(); |
| 590 | if (spooler != null) { |
| 591 | final long identity = Binder.clearCallingIdentity(); |
| 592 | try { |
| 593 | spooler.mCallbacks.onStartPrinterDiscovery(observer); |
| 594 | } finally { |
| 595 | Binder.restoreCallingIdentity(identity); |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | @Override |
| 601 | public void onStopPrinterDiscovery() throws RemoteException { |
| 602 | RemotePrintSpooler spooler = mWeakSpooler.get(); |
| 603 | if (spooler != null) { |
| 604 | final long identity = Binder.clearCallingIdentity(); |
| 605 | try { |
| 606 | spooler.mCallbacks.onStopPrinterDiscovery(); |
| 607 | } finally { |
| 608 | Binder.restoreCallingIdentity(identity); |
| 609 | } |
| 610 | } |
| 611 | } |
| 612 | } |
| 613 | } |