com.google.android.gms.drive.ExecutionOptions Java Examples

private Task<Void> saveFile() {
    Log.d(TAG, "Saving file.");
    // [START drive_android_reopen_for_write]
    Task<DriveContents> reopenTask =
            getDriveResourceClient().reopenContentsForWrite(mDriveContents);
    // [END drive_android_reopen_for_write]
    return reopenTask
            .continueWithTask(task -> {
                // [START drive_android_write_conflict_strategy]
                DriveContents driveContents = task.getResult();
                OutputStream outputStream = driveContents.getOutputStream();
                try (Writer writer = new OutputStreamWriter(outputStream)) {
                    writer.write(mEditText.getText().toString());
                }
                // ExecutionOptions define the conflict strategy to be used.
                // [START drive_android_execution_options]
                ExecutionOptions executionOptions =
                        new ExecutionOptions.Builder()
                                .setNotifyOnCompletion(true)
                                .setConflictStrategy(
                                        ExecutionOptions.CONFLICT_STRATEGY_KEEP_REMOTE)
                                .build();
                return getDriveResourceClient().commitContents(
                        driveContents, null, executionOptions);
                // [END drive_android_execution_options]
                // [END drive_android_write_conflict_strategy]
            })
            .continueWithTask(task -> {
                showMessage(getString(R.string.file_saved));
                Log.d(TAG, "Reopening file for read.");
                return loadContents(mGroceryListFile);
            });
}
 

/**
 * Initiate the resolution process by connecting the GoogleApiClient.
 */
void resolve() {
    // [START drive_android_resolve_conflict]
    // A new DriveResourceClient should be created to handle each new CompletionEvent since each
    // event is tied to a specific user account. Any DriveFile action taken must be done using
    // the correct account.
    GoogleSignInOptions.Builder signInOptionsBuilder =
            new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                    .requestScopes(Drive.SCOPE_FILE)
                    .requestScopes(Drive.SCOPE_APPFOLDER);
    if (mConflictedCompletionEvent.getAccountName() != null) {
        signInOptionsBuilder.setAccountName(mConflictedCompletionEvent.getAccountName());
    }
    GoogleSignInClient signInClient =
            GoogleSignIn.getClient(mContext, signInOptionsBuilder.build());
    signInClient.silentSignIn()
            .continueWith(mExecutorService,
                    (Continuation<GoogleSignInAccount, Void>) signInTask -> {
                        mDriveResourceClient = Drive.getDriveResourceClient(
                                mContext, signInTask.getResult());
                        mBaseContent = ConflictUtil.getStringFromInputStream(
                                mConflictedCompletionEvent.getBaseContentsInputStream());
                        mModifiedContent = ConflictUtil.getStringFromInputStream(
                                mConflictedCompletionEvent
                                        .getModifiedContentsInputStream());
                        return null;
                    })
            .continueWithTask(mExecutorService,
                    task -> {
                        DriveId driveId = mConflictedCompletionEvent.getDriveId();
                        return mDriveResourceClient.openFile(
                                driveId.asDriveFile(), DriveFile.MODE_READ_ONLY);
                    })
            .continueWithTask(mExecutorService,
                    task -> {
                        mDriveContents = task.getResult();
                        InputStream serverInputStream = task.getResult().getInputStream();
                        mServerContent =
                                ConflictUtil.getStringFromInputStream(serverInputStream);
                        return mDriveResourceClient.reopenContentsForWrite(mDriveContents);
                    })
            .continueWithTask(mExecutorService,
                    task -> {
                        DriveContents contentsForWrite = task.getResult();
                        mResolvedContent = ConflictUtil.resolveConflict(
                                mBaseContent, mServerContent, mModifiedContent);

                        OutputStream outputStream = contentsForWrite.getOutputStream();
                        try (Writer writer = new OutputStreamWriter(outputStream)) {
                            writer.write(mResolvedContent);
                        }

                        // It is not likely that resolving a conflict will result in another
                        // conflict, but it can happen if the file changed again while this
                        // conflict was resolved. Since we already implemented conflict
                        // resolution and we never want to miss user data, we commit here
                        // with execution options in conflict-aware mode (otherwise we would
                        // overwrite server content).
                        ExecutionOptions executionOptions =
                                new ExecutionOptions.Builder()
                                        .setNotifyOnCompletion(true)
                                        .setConflictStrategy(
                                                ExecutionOptions
                                                        .CONFLICT_STRATEGY_KEEP_REMOTE)
                                        .build();

                        // Commit resolved contents.
                        MetadataChangeSet modifiedMetadataChangeSet =
                                mConflictedCompletionEvent.getModifiedMetadataChangeSet();
                        return mDriveResourceClient.commitContents(contentsForWrite,
                                modifiedMetadataChangeSet, executionOptions);
            })
            .addOnSuccessListener(aVoid -> {
                mConflictedCompletionEvent.dismiss();
                Log.d(TAG, "resolved list");
                sendResult(mModifiedContent);
            })
            .addOnFailureListener(e -> {
                // The contents cannot be reopened at this point, probably due to
                // connectivity, so by snoozing the event we will get it again later.
                Log.d(TAG, "Unable to write resolved content, snoozing completion event.",
                        e);
                mConflictedCompletionEvent.snooze();
                if (mDriveContents != null) {
                    mDriveResourceClient.discardContents(mDriveContents);
                }
            });
    // [END drive_android_resolve_conflict]
}