Catch exceptions we can't do anything about.
This also abstracts away the "package deactivated" case for simpler and safer code. Bug: 11072561 Change-Id: Idaaf2ae8d8d5b2c4a15de641bbf2f8c5c7cc9410main
parent
4197c6f3ab
commit
a149731a67
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@ -117,16 +117,11 @@ public final class ActionBatch {
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final ContentValues values = MetadataDbHelper.getContentValuesByWordListId(db,
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mWordList.mId, mWordList.mVersion);
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final int status = values.getAsInteger(MetadataDbHelper.STATUS_COLUMN);
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final DownloadManager manager =
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(DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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final DownloadManagerWrapper manager = new DownloadManagerWrapper(context);
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if (MetadataDbHelper.STATUS_DOWNLOADING == status) {
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// The word list is still downloading. Cancel the download and revert the
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// word list status to "available".
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if (null != manager) {
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// DownloadManager is disabled (or not installed?). We can't cancel - there
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// is nothing we can do. We still need to mark the entry as available.
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manager.remove(values.getAsLong(MetadataDbHelper.PENDINGID_COLUMN));
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}
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manager.remove(values.getAsLong(MetadataDbHelper.PENDINGID_COLUMN));
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MetadataDbHelper.markEntryAsAvailable(db, mWordList.mId, mWordList.mVersion);
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} else if (MetadataDbHelper.STATUS_AVAILABLE != status) {
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// Should never happen
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@ -136,9 +131,6 @@ public final class ActionBatch {
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// Download it.
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DebugLogUtils.l("Upgrade word list, downloading", mWordList.mRemoteFilename);
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// TODO: if DownloadManager is disabled or not installed, download by ourselves
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if (null == manager) return;
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// This is an upgraded word list: we should download it.
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// Adding a disambiguator to circumvent a bug in older versions of DownloadManager.
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// DownloadManager also stupidly cuts the extension to replace with its own that it
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@ -293,13 +285,8 @@ public final class ActionBatch {
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}
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// The word list is still downloading. Cancel the download and revert the
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// word list status to "available".
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final DownloadManager manager =
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(DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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if (null != manager) {
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// If we can't cancel the download because DownloadManager is not available,
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// we still need to mark the entry as available.
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manager.remove(values.getAsLong(MetadataDbHelper.PENDINGID_COLUMN));
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}
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final DownloadManagerWrapper manager = new DownloadManagerWrapper(context);
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manager.remove(values.getAsLong(MetadataDbHelper.PENDINGID_COLUMN));
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MetadataDbHelper.markEntryAsAvailable(db, mWordList.mId, mWordList.mVersion);
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}
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}
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@ -107,26 +107,22 @@ public class DictionaryDownloadProgressBar extends ProgressBar {
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private class UpdaterThread extends Thread {
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private final static int REPORT_PERIOD = 150; // how often to report progress, in ms
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final DownloadManager mDownloadManager;
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final DownloadManagerWrapper mDownloadManagerWrapper;
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final int mId;
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public UpdaterThread(final Context context, final int id) {
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super();
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mDownloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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mDownloadManagerWrapper = new DownloadManagerWrapper(context);
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mId = id;
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}
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@Override
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public void run() {
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try {
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// It's almost impossible that mDownloadManager is null (it would mean it has been
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// disabled between pressing the 'install' button and displaying the progress
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// bar), but just in case.
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if (null == mDownloadManager) return;
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final UpdateHelper updateHelper = new UpdateHelper();
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final Query query = new Query().setFilterById(mId);
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int lastProgress = 0;
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setIndeterminate(true);
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while (!isInterrupted()) {
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final Cursor cursor = mDownloadManager.query(query);
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final Cursor cursor = mDownloadManagerWrapper.query(query);
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if (null == cursor) {
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// Can't contact DownloadManager: this should never happen.
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return;
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@ -0,0 +1,99 @@
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.android.inputmethod.dictionarypack;
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import android.app.DownloadManager;
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import android.app.DownloadManager.Query;
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import android.app.DownloadManager.Request;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteException;
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import android.os.ParcelFileDescriptor;
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import android.util.Log;
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import java.io.FileNotFoundException;
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/**
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* A class to help with calling DownloadManager methods.
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*
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* Mostly, the problem here is that most methods from DownloadManager may throw SQL exceptions if
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* they can't open the database on disk. We want to avoid crashing in these cases but can't do
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* much more, so this class insulates the callers from these. SQLiteException also inherit from
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* RuntimeException so they are unchecked :(
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* While we're at it, we also insulate callers from the cases where DownloadManager is disabled,
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* and getSystemService returns null.
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*/
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public class DownloadManagerWrapper {
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private final static String TAG = DownloadManagerWrapper.class.getSimpleName();
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private final DownloadManager mDownloadManager;
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public DownloadManagerWrapper(final Context context) {
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this((DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE));
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}
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private DownloadManagerWrapper(final DownloadManager downloadManager) {
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mDownloadManager = downloadManager;
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}
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public void remove(final long... ids) {
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try {
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if (null != mDownloadManager) {
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mDownloadManager.remove(ids);
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}
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} catch (SQLiteException e) {
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// We couldn't remove the file from DownloadManager. Apparently, the database can't
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// be opened. It may be a problem with file system corruption. In any case, there is
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// not much we can do apart from avoiding crashing.
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Log.e(TAG, "Can't remove files with ID " + ids + " from download manager", e);
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}
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}
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public ParcelFileDescriptor openDownloadedFile(final long fileId) throws FileNotFoundException {
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try {
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if (null != mDownloadManager) {
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return mDownloadManager.openDownloadedFile(fileId);
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}
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} catch (SQLiteException e) {
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Log.e(TAG, "Can't open downloaded file with ID " + fileId, e);
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}
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// We come here if mDownloadManager is null or if an exception was thrown.
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throw new FileNotFoundException();
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}
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public Cursor query(final Query query) {
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try {
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if (null != mDownloadManager) {
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return mDownloadManager.query(query);
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}
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} catch (SQLiteException e) {
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Log.e(TAG, "Can't query the download manager", e);
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}
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// We come here if mDownloadManager is null or if an exception was thrown.
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return null;
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}
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public long enqueue(final Request request) {
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try {
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if (null != mDownloadManager) {
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return mDownloadManager.enqueue(request);
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}
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} catch (SQLiteException e) {
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Log.e(TAG, "Can't enqueue a request with the download manager", e);
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}
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return 0;
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}
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}
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@ -249,13 +249,7 @@ public final class UpdateHandler {
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metadataRequest.setVisibleInDownloadsUi(
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res.getBoolean(R.bool.metadata_downloads_visible_in_download_UI));
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final DownloadManager manager =
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(DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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if (null == manager) {
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// Download manager is not installed or disabled.
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// TODO: fall back to self-managed download?
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return;
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}
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final DownloadManagerWrapper manager = new DownloadManagerWrapper(context);
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cancelUpdateWithDownloadManager(context, metadataUri, manager);
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final long downloadId;
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synchronized (sSharedIdProtector) {
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*
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* @param context the context to open the database on
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* @param metadataUri the URI to cancel
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* @param manager an instance of DownloadManager
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* @param manager an wrapped instance of DownloadManager
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*/
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private static void cancelUpdateWithDownloadManager(final Context context,
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final String metadataUri, final DownloadManager manager) {
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final String metadataUri, final DownloadManagerWrapper manager) {
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synchronized (sSharedIdProtector) {
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final long metadataDownloadId =
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MetadataDbHelper.getMetadataDownloadIdForURI(context, metadataUri);
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@ -306,10 +300,9 @@ public final class UpdateHandler {
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* @param clientId the ID of the client we want to cancel the update of
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*/
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public static void cancelUpdate(final Context context, final String clientId) {
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final DownloadManager manager =
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(DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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final DownloadManagerWrapper manager = new DownloadManagerWrapper(context);
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final String metadataUri = MetadataDbHelper.getMetadataUriAsString(context, clientId);
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if (null != manager) cancelUpdateWithDownloadManager(context, metadataUri, manager);
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cancelUpdateWithDownloadManager(context, metadataUri, manager);
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}
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/**
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* download request id, which is not known before submitting the request to the download
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* manager. Hence, it only updates the relevant line.
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*
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* @param manager the download manager service to register the request with.
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* @param manager a wrapped download manager service to register the request with.
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* @param request the request to register.
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* @param db the metadata database.
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* @param id the id of the word list.
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* @param version the version of the word list.
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* @return the download id returned by the download manager.
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*/
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public static long registerDownloadRequest(final DownloadManager manager, final Request request,
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final SQLiteDatabase db, final String id, final int version) {
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public static long registerDownloadRequest(final DownloadManagerWrapper manager,
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final Request request, final SQLiteDatabase db, final String id, final int version) {
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DebugLogUtils.l("RegisterDownloadRequest for word list id : ", id, ", version ", version);
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final long downloadId;
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synchronized (sSharedIdProtector) {
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@ -345,8 +338,8 @@ public final class UpdateHandler {
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/**
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* Retrieve information about a specific download from DownloadManager.
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*/
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private static CompletedDownloadInfo getCompletedDownloadInfo(final DownloadManager manager,
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final long downloadId) {
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private static CompletedDownloadInfo getCompletedDownloadInfo(
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final DownloadManagerWrapper manager, final long downloadId) {
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final Query query = new Query().setFilterById(downloadId);
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final Cursor cursor = manager.query(query);
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DebugLogUtils.l("DownloadFinished with id", fileId);
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if (NOT_AN_ID == fileId) return; // Spurious wake-up: ignore
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final DownloadManager manager =
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(DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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final DownloadManagerWrapper manager = new DownloadManagerWrapper(context);
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final CompletedDownloadInfo downloadInfo = getCompletedDownloadInfo(manager, fileId);
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final ArrayList<DownloadRecord> recordList =
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@ -517,7 +509,7 @@ public final class UpdateHandler {
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}
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private static boolean handleDownloadedFile(final Context context,
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final DownloadRecord downloadRecord, final DownloadManager manager,
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final DownloadRecord downloadRecord, final DownloadManagerWrapper manager,
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final long fileId) {
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try {
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// {@link handleWordList(Context,InputStream,ContentValues)}.
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Reference in New Issue