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+/* ownCloud Android client application
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+ * Copyright (C) 2012-2013 ownCloud Inc.
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2,
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+ * as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ *
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+ */
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+
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+package com.owncloud.android.services;
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+
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+import java.io.IOException;
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+import java.util.concurrent.ConcurrentLinkedQueue;
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+
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+import com.owncloud.android.datamodel.FileDataStorageManager;
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+
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+import com.owncloud.android.lib.network.OwnCloudClientFactory;
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+import com.owncloud.android.lib.network.OwnCloudClient;
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+import com.owncloud.android.operations.GetSharesOperation;
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+import com.owncloud.android.operations.common.SyncOperation;
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+import com.owncloud.android.lib.operations.common.RemoteOperation;
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+import com.owncloud.android.lib.operations.common.RemoteOperationResult;
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+import com.owncloud.android.utils.Log_OC;
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+
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+import android.accounts.Account;
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+import android.accounts.AccountsException;
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+import android.app.Service;
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+import android.content.Intent;
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+import android.net.Uri;
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+import android.os.Binder;
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+import android.os.Handler;
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+import android.os.HandlerThread;
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+import android.os.IBinder;
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+import android.os.Looper;
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+import android.os.Message;
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+import android.os.Process;
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+import android.support.v4.content.LocalBroadcastManager;
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+import android.util.Pair;
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+
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+public class OperationsService extends Service {
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+
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+ private static final String TAG = OperationsService.class.getSimpleName();
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+
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+ public static final String EXTRA_ACCOUNT = "ACCOUNT";
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+ public static final String EXTRA_SERVER_URL = "SERVER_URL";
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+ public static final String EXTRA_RESULT = "RESULT";
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+
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+ public static final String ACTION_OPERATION_ADDED = OperationsService.class.getName() + ".OPERATION_ADDED";
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+ public static final String ACTION_OPERATION_FINISHED = OperationsService.class.getName() + ".OPERATION_FINISHED";
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+
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+ private ConcurrentLinkedQueue<Pair<Target, RemoteOperation>> mPendingOperations = new ConcurrentLinkedQueue<Pair<Target, RemoteOperation>>();
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+
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+ private static class Target {
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+ public Uri mServerUrl = null;
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+ public Account mAccount = null;
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+ public Target(Account account, Uri serverUrl) {
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+ mAccount = account;
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+ mServerUrl = serverUrl;
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+ }
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+ }
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+
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+ private Looper mServiceLooper;
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+ private ServiceHandler mServiceHandler;
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+ private IBinder mBinder;
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+ private OwnCloudClient mOwnCloudClient = null;
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+ private Target mLastTarget = null;
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+ private FileDataStorageManager mStorageManager;
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+ private RemoteOperation mCurrentOperation = null;
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+
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+
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+ /**
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+ * Service initialization
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+ */
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+ @Override
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+ public void onCreate() {
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+ super.onCreate();
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+ HandlerThread thread = new HandlerThread("Operations service thread", Process.THREAD_PRIORITY_BACKGROUND);
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+ thread.start();
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+ mServiceLooper = thread.getLooper();
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+ mServiceHandler = new ServiceHandler(mServiceLooper, this);
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+ mBinder = new OperationsServiceBinder();
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+ }
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+
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+ /**
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+ * Entry point to add a new operation to the queue of operations.
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+ *
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+ * New operations are added calling to startService(), resulting in a call to this method.
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+ * This ensures the service will keep on working although the caller activity goes away.
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+ *
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+ * IMPORTANT: the only operations performed here right now is {@link GetSharedFilesOperation}. The class
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+ * is taking advantage of it due to time constraints.
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+ */
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+ @Override
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+ public int onStartCommand(Intent intent, int flags, int startId) {
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+ if (!intent.hasExtra(EXTRA_ACCOUNT) && !intent.hasExtra(EXTRA_SERVER_URL)) {
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+ Log_OC.e(TAG, "Not enough information provided in intent");
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+ return START_NOT_STICKY;
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+ }
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+ try {
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+ Account account = intent.getParcelableExtra(EXTRA_ACCOUNT);
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+ String serverUrl = intent.getStringExtra(EXTRA_SERVER_URL);
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+ Target target = new Target(account, (serverUrl == null) ? null : Uri.parse(serverUrl));
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+ GetSharesOperation operation = new GetSharesOperation();
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+ mPendingOperations.add(new Pair<Target , RemoteOperation>(target, operation));
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+ sendBroadcastNewOperation(target, operation);
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+
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+ Message msg = mServiceHandler.obtainMessage();
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+ msg.arg1 = startId;
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+ mServiceHandler.sendMessage(msg);
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+
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+ } catch (IllegalArgumentException e) {
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+ Log_OC.e(TAG, "Bad information provided in intent: " + e.getMessage());
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+ return START_NOT_STICKY;
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+ }
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+
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+ return START_NOT_STICKY;
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+ }
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+
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+
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+ /**
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+ * Provides a binder object that clients can use to perform actions on the queue of operations,
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+ * except the addition of new operations.
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+ */
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+ @Override
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+ public IBinder onBind(Intent intent) {
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+ return mBinder;
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+ }
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+
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+
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+ /**
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+ * Called when ALL the bound clients were unbound.
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+ */
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+ @Override
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+ public boolean onUnbind(Intent intent) {
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+ //((OperationsServiceBinder)mBinder).clearListeners();
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+ return false; // not accepting rebinding (default behaviour)
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+ }
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+
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+
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+ /**
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+ * Binder to let client components to perform actions on the queue of operations.
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+ *
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+ * It provides by itself the available operations.
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+ */
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+ public class OperationsServiceBinder extends Binder {
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+ // TODO
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+ }
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+
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+
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+ /**
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+ * Operations worker. Performs the pending operations in the order they were requested.
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+ *
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+ * Created with the Looper of a new thread, started in {@link OperationsService#onCreate()}.
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+ */
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+ private static class ServiceHandler extends Handler {
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+ // don't make it a final class, and don't remove the static ; lint will warn about a possible memory leak
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+ OperationsService mService;
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+ public ServiceHandler(Looper looper, OperationsService service) {
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+ super(looper);
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+ if (service == null) {
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+ throw new IllegalArgumentException("Received invalid NULL in parameter 'service'");
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+ }
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+ mService = service;
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+ }
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+
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+ @Override
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+ public void handleMessage(Message msg) {
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+ mService.nextOperation();
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+ mService.stopSelf(msg.arg1);
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+ }
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+ }
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+
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+
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+ /**
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+ * Performs the next operation in the queue
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+ */
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+ private void nextOperation() {
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+
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+ Pair<Target, RemoteOperation> next = null;
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+ synchronized(mPendingOperations) {
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+ next = mPendingOperations.peek();
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+ }
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+
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+ if (next != null) {
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+
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+ mCurrentOperation = next.second;
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+ RemoteOperationResult result = null;
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+ try {
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+ /// prepare client object to send the request to the ownCloud server
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+ if (mLastTarget == null || !mLastTarget.equals(next.first)) {
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+ mLastTarget = next.first;
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+ if (mLastTarget.mAccount != null) {
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+ mOwnCloudClient = OwnCloudClientFactory.createOwnCloudClient(mLastTarget.mAccount, getApplicationContext());
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+ mStorageManager = new FileDataStorageManager(mLastTarget.mAccount, getContentResolver());
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+ } else {
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+ mOwnCloudClient = OwnCloudClientFactory.createOwnCloudClient(mLastTarget.mServerUrl, getApplicationContext(), true); // this is not good enough
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+ mStorageManager = null;
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+ }
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+ }
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+
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+ /// perform the operation
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+ if (mCurrentOperation instanceof SyncOperation) {
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+ result = ((SyncOperation)mCurrentOperation).execute(mOwnCloudClient, mStorageManager);
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+ } else {
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+ result = mCurrentOperation.execute(mOwnCloudClient);
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+ }
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+
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+ } catch (AccountsException e) {
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+ if (mLastTarget.mAccount == null) {
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+ Log_OC.e(TAG, "Error while trying to get autorization for a NULL account", e);
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+ } else {
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+ Log_OC.e(TAG, "Error while trying to get autorization for " + mLastTarget.mAccount.name, e);
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+ }
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+ result = new RemoteOperationResult(e);
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+
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+ } catch (IOException e) {
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+ if (mLastTarget.mAccount == null) {
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+ Log_OC.e(TAG, "Error while trying to get autorization for a NULL account", e);
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+ } else {
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+ Log_OC.e(TAG, "Error while trying to get autorization for " + mLastTarget.mAccount.name, e);
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+ }
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+ result = new RemoteOperationResult(e);
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+
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+ } finally {
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+ synchronized(mPendingOperations) {
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+ mPendingOperations.poll();
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+ }
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+ }
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+
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+ sendBroadcastOperationFinished(mLastTarget, mCurrentOperation, result);
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+ }
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+ }
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+
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+
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+ /**
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+ * Sends a LOCAL broadcast when a new operation is added to the queue.
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+ *
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+ * Local broadcasts are only delivered to activities in the same process.
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+ *
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+ * @param target Account or URL pointing to an OC server.
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+ * @param operation Added operation.
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+ */
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+ private void sendBroadcastNewOperation(Target target, RemoteOperation operation) {
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+ Intent intent = new Intent(ACTION_OPERATION_ADDED);
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+ if (target.mAccount != null) {
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+ intent.putExtra(EXTRA_ACCOUNT, target.mAccount);
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+ } else {
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+ intent.putExtra(EXTRA_SERVER_URL, target.mServerUrl);
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+ }
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+ LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(this);
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+ lbm.sendBroadcast(intent);
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+ }
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+
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+
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+ // TODO - maybe add a notification for real start of operations
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+
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+ /**
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+ * Sends a LOCAL broadcast when an operations finishes in order to the interested activities can update their view
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+ *
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+ * Local broadcasts are only delivered to activities in the same process.
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+ *
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+ * @param target Account or URL pointing to an OC server.
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+ * @param operation Finished operation.
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+ * @param result Result of the operation.
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+ */
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+ private void sendBroadcastOperationFinished(Target target, RemoteOperation operation, RemoteOperationResult result) {
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+ Intent intent = new Intent(ACTION_OPERATION_FINISHED);
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+ intent.putExtra(EXTRA_RESULT, result);
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+ if (target.mAccount != null) {
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+ intent.putExtra(EXTRA_ACCOUNT, target.mAccount);
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+ } else {
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+ intent.putExtra(EXTRA_SERVER_URL, target.mServerUrl);
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+ }
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+ LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(this);
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+ lbm.sendBroadcast(intent);
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+ }
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+
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+
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+}
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David A. Velasco