X-Git-Url: http://git.linex4red.de/pub/Android/ownCloud.git/blobdiff_plain/ab946b9af69f3f299d72026db69f5f650096d8e8..6ace8ab1c18b23a4c016986256075cfda8e50104:/src/com/owncloud/android/files/services/FileObserverService.java
diff --git a/src/com/owncloud/android/files/services/FileObserverService.java b/src/com/owncloud/android/files/services/FileObserverService.java
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+/* ownCloud Android client application
+ * Copyright (C) 2012 Bartek Przybylski
+ * Copyright (C) 2012-2013 ownCloud Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ *
+ */
+
+package com.owncloud.android.files.services;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.owncloud.android.Log_OC;
+import com.owncloud.android.datamodel.FileDataStorageManager;
+import com.owncloud.android.datamodel.OCFile;
+import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
+import com.owncloud.android.files.OwnCloudFileObserver;
+import com.owncloud.android.operations.SynchronizeFileOperation;
+import com.owncloud.android.utils.FileStorageUtils;
+
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.app.Service;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.database.Cursor;
+import android.os.Binder;
+import android.os.IBinder;
+
+public class FileObserverService extends Service {
+
+ public final static int CMD_INIT_OBSERVED_LIST = 1;
+ public final static int CMD_ADD_OBSERVED_FILE = 2;
+ public final static int CMD_DEL_OBSERVED_FILE = 3;
+
+ public final static String KEY_FILE_CMD = "KEY_FILE_CMD";
+ public final static String KEY_CMD_ARG_FILE = "KEY_CMD_ARG_FILE";
+ public final static String KEY_CMD_ARG_ACCOUNT = "KEY_CMD_ARG_ACCOUNT";
+
+ private static String TAG = FileObserverService.class.getSimpleName();
+
+ private static Map mObserversMap;
+ private static DownloadCompletedReceiverBis mDownloadReceiver;
+ private IBinder mBinder = new LocalBinder();
+
+ private String mDownloadAddedMessage;
+ private String mDownloadFinishMessage;
+
+ public class LocalBinder extends Binder {
+ FileObserverService getService() {
+ return FileObserverService.this;
+ }
+ }
+
+ @Override
+ public void onCreate() {
+ super.onCreate();
+ mDownloadReceiver = new DownloadCompletedReceiverBis();
+
+ FileDownloader downloader = new FileDownloader();
+ mDownloadAddedMessage = downloader.getDownloadAddedMessage();
+ mDownloadFinishMessage= downloader.getDownloadFinishMessage();
+
+ IntentFilter filter = new IntentFilter();
+ filter.addAction(mDownloadAddedMessage);
+ filter.addAction(mDownloadFinishMessage);
+ registerReceiver(mDownloadReceiver, filter);
+
+ mObserversMap = new HashMap();
+ //initializeObservedList();
+ }
+
+
+ @Override
+ public void onDestroy() {
+ super.onDestroy();
+ unregisterReceiver(mDownloadReceiver);
+ mObserversMap = null; // TODO study carefully the life cycle of Services to grant the best possible observance
+ Log_OC.d(TAG, "Bye, bye");
+ }
+
+
+ @Override
+ public IBinder onBind(Intent intent) {
+ return mBinder;
+ }
+
+ @Override
+ public int onStartCommand(Intent intent, int flags, int startId) {
+ // this occurs when system tries to restart
+ // service, so we need to reinitialize observers
+ if (intent == null) {
+ initializeObservedList();
+ return Service.START_STICKY;
+ }
+
+ if (!intent.hasExtra(KEY_FILE_CMD)) {
+ Log_OC.e(TAG, "No KEY_FILE_CMD argument given");
+ return Service.START_STICKY;
+ }
+
+ switch (intent.getIntExtra(KEY_FILE_CMD, -1)) {
+ case CMD_INIT_OBSERVED_LIST:
+ initializeObservedList();
+ break;
+ case CMD_ADD_OBSERVED_FILE:
+ addObservedFile( (OCFile)intent.getParcelableExtra(KEY_CMD_ARG_FILE),
+ (Account)intent.getParcelableExtra(KEY_CMD_ARG_ACCOUNT));
+ break;
+ case CMD_DEL_OBSERVED_FILE:
+ removeObservedFile( (OCFile)intent.getParcelableExtra(KEY_CMD_ARG_FILE),
+ (Account)intent.getParcelableExtra(KEY_CMD_ARG_ACCOUNT));
+ break;
+ default:
+ Log_OC.wtf(TAG, "Incorrect key given");
+ }
+
+ return Service.START_STICKY;
+ }
+
+
+ /**
+ * Read from the local database the list of files that must to be kept synchronized and
+ * starts file observers to monitor local changes on them
+ */
+ private void initializeObservedList() {
+ mObserversMap.clear();
+ Cursor c = getContentResolver().query(
+ ProviderTableMeta.CONTENT_URI,
+ null,
+ ProviderTableMeta.FILE_KEEP_IN_SYNC + " = ?",
+ new String[] {String.valueOf(1)},
+ null);
+ if (c == null || !c.moveToFirst()) return;
+ AccountManager acm = AccountManager.get(this);
+ Account[] accounts = acm.getAccounts();
+ do {
+ Account account = null;
+ for (Account a : accounts)
+ if (a.name.equals(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_ACCOUNT_OWNER)))) {
+ account = a;
+ break;
+ }
+
+ if (account == null) continue;
+ FileDataStorageManager storage =
+ new FileDataStorageManager(account, getContentResolver());
+ if (!storage.fileExists(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_PATH))))
+ continue;
+
+ String path = c.getString(c.getColumnIndex(ProviderTableMeta.FILE_STORAGE_PATH));
+ if (path == null || path.length() <= 0)
+ continue;
+ OwnCloudFileObserver observer =
+ new OwnCloudFileObserver( path,
+ account,
+ getApplicationContext(),
+ OwnCloudFileObserver.CHANGES_ONLY);
+ mObserversMap.put(path, observer);
+ if (new File(path).exists()) {
+ observer.startWatching();
+ Log_OC.d(TAG, "Started watching file " + path);
+ }
+
+ } while (c.moveToNext());
+ c.close();
+ }
+
+
+ /**
+ * Registers the local copy of a remote file to be observed for local changes,
+ * an automatically updated in the ownCloud server.
+ *
+ * This method does NOT perform a {@link SynchronizeFileOperation} over the file.
+ *
+ * TODO We are ignoring that, currently, a local file can be linked to different files
+ * in ownCloud if it's uploaded several times. That's something pending to update: we
+ * will avoid that the same local file is linked to different remote files.
+ *
+ * @param file Object representing a remote file which local copy must be observed.
+ * @param account OwnCloud account containing file.
+ */
+ private void addObservedFile(OCFile file, Account account) {
+ if (file == null) {
+ Log_OC.e(TAG, "Trying to add a NULL file to observer");
+ return;
+ }
+ String localPath = file.getStoragePath();
+ if (localPath == null || localPath.length() <= 0) { // file downloading / to be download for the first time
+ localPath = FileStorageUtils.getDefaultSavePathFor(account.name, file);
+ }
+ OwnCloudFileObserver observer = mObserversMap.get(localPath);
+ if (observer == null) {
+ /// the local file was never registered to observe before
+ observer = new OwnCloudFileObserver( localPath,
+ account,
+ getApplicationContext(),
+ OwnCloudFileObserver.CHANGES_ONLY);
+ mObserversMap.put(localPath, observer);
+ Log_OC.d(TAG, "Observer added for path " + localPath);
+
+ if (file.isDown()) {
+ observer.startWatching();
+ Log_OC.d(TAG, "Started watching " + localPath);
+ } // else - the observance can't be started on a file not already down; mDownloadReceiver will get noticed when the download of the file finishes
+ }
+
+ }
+
+
+ /**
+ * Unregisters the local copy of a remote file to be observed for local changes.
+ *
+ * Starts to watch it, if the file has a local copy to watch.
+ *
+ * TODO We are ignoring that, currently, a local file can be linked to different files
+ * in ownCloud if it's uploaded several times. That's something pending to update: we
+ * will avoid that the same local file is linked to different remote files.
+ *
+ * @param file Object representing a remote file which local copy must be not observed longer.
+ * @param account OwnCloud account containing file.
+ */
+ private void removeObservedFile(OCFile file, Account account) {
+ if (file == null) {
+ Log_OC.e(TAG, "Trying to remove a NULL file");
+ return;
+ }
+ String localPath = file.getStoragePath();
+ if (localPath == null || localPath.length() <= 0) {
+ localPath = FileStorageUtils.getDefaultSavePathFor(account.name, file);
+ }
+
+ OwnCloudFileObserver observer = mObserversMap.get(localPath);
+ if (observer != null) {
+ observer.stopWatching();
+ mObserversMap.remove(observer);
+ Log_OC.d(TAG, "Stopped watching " + localPath);
+ }
+
+ }
+
+
+ /**
+ * Private receiver listening to events broadcast by the FileDownloader service.
+ *
+ * Starts and stops the observance on registered files when they are being download,
+ * in order to avoid to start unnecessary synchronizations.
+ */
+ private class DownloadCompletedReceiverBis extends BroadcastReceiver {
+
+ @Override
+ public void onReceive(Context context, Intent intent) {
+ String downloadPath = intent.getStringExtra(FileDownloader.EXTRA_FILE_PATH);
+ OwnCloudFileObserver observer = mObserversMap.get(downloadPath);
+ if (observer != null) {
+ if (intent.getAction().equals(mDownloadFinishMessage) &&
+ new File(downloadPath).exists()) { // the download could be successful. not; in both cases, the file could be down, due to a former download or upload
+ observer.startWatching();
+ Log_OC.d(TAG, "Watching again " + downloadPath);
+
+ } else if (intent.getAction().equals(mDownloadAddedMessage)) {
+ observer.stopWatching();
+ Log_OC.d(TAG, "Disabling observance of " + downloadPath);
+ }
+ }
+ }
+
+ }
+
+}