Java tutorial
/* * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package cn.code.notes.gtask.remote; import android.app.Activity; import android.content.ContentResolver; import android.content.ContentUris; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.util.Log; import cn.code.notes.R; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import cn.code.notes.data.Notes; import cn.code.notes.data.NoteColumnsInterface.DataColumns; import cn.code.notes.data.NoteColumnsInterface.NoteColumns; import cn.code.notes.gtask.data.MetaData; import cn.code.notes.gtask.data.Node; import cn.code.notes.gtask.data.SqlNote; import cn.code.notes.gtask.data.Task; import cn.code.notes.gtask.data.TaskList; import cn.code.notes.gtask.exception.ActionFailureException; import cn.code.notes.gtask.exception.NetworkFailureException; import cn.code.notes.tool.DataUtils; import cn.code.notes.tool.GTaskStringUtils; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.Map; public class GTaskManager { private static final String TAG = GTaskManager.class.getSimpleName(); public static final int STATE_SUCCESS = 0; public static final int STATE_NETWORK_ERROR = 1; public static final int STATE_INTERNAL_ERROR = 2; public static final int STATE_SYNC_IN_PROGRESS = 3; public static final int STATE_SYNC_CANCELLED = 4; private static GTaskManager mInstance = null; private Activity mActivity; private Context mContext; private ContentResolver mContentResolver; private boolean mSyncing; private boolean mCancelled; private HashMap<String, TaskList> mGTaskListHashMap; private HashMap<String, Node> mGTaskHashMap; private HashMap<String, MetaData> mMetaHashMap; private TaskList mMetaList; private HashSet<Long> mLocalDeleteIdMap; private HashMap<String, Long> mGidToNid; private HashMap<Long, String> mNidToGid; private GTaskManager() { mSyncing = false; mCancelled = false; mGTaskListHashMap = new HashMap<String, TaskList>(); mGTaskHashMap = new HashMap<String, Node>(); mMetaHashMap = new HashMap<String, MetaData>(); mMetaList = null; mLocalDeleteIdMap = new HashSet<Long>(); mGidToNid = new HashMap<String, Long>(); mNidToGid = new HashMap<Long, String>(); } public static synchronized GTaskManager getInstance() { if (mInstance == null) { mInstance = new GTaskManager(); } return mInstance; } public synchronized void setActivityContext(Activity activity) { mActivity = activity; } public int sync(Context context, GTaskASyncTask asyncTask) { if (mSyncing) { Log.d(TAG, "Sync is in progress"); return STATE_SYNC_IN_PROGRESS; } mContext = context; mContentResolver = mContext.getContentResolver(); mSyncing = true; mCancelled = false; mGTaskListHashMap.clear(); mGTaskHashMap.clear(); mMetaHashMap.clear(); mLocalDeleteIdMap.clear(); mGidToNid.clear(); mNidToGid.clear(); try { GTaskClient client = GTaskClient.getInstance(); client.resetUpdateArray(); // login google task if (!mCancelled) { if (!client.login(mActivity)) { throw new NetworkFailureException("login google task failed"); } } // get the task list from google asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list)); initGTaskList(); // do content sync work asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing)); syncContent(); } catch (NetworkFailureException e) { Log.e(TAG, e.toString()); return STATE_NETWORK_ERROR; } catch (ActionFailureException e) { Log.e(TAG, e.toString()); return STATE_INTERNAL_ERROR; } catch (Exception e) { Log.e(TAG, e.toString()); e.printStackTrace(); return STATE_INTERNAL_ERROR; } finally { mGTaskListHashMap.clear(); mGTaskHashMap.clear(); mMetaHashMap.clear(); mLocalDeleteIdMap.clear(); mGidToNid.clear(); mNidToGid.clear(); mSyncing = false; } return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS; } private void initGTaskList() throws NetworkFailureException { if (mCancelled) return; GTaskClient client = GTaskClient.getInstance(); try { JSONArray jsTaskLists = client.getTaskLists(); // init meta list first mMetaList = null; for (int i = 0; i < jsTaskLists.length(); i++) { JSONObject object = jsTaskLists.getJSONObject(i); String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID); String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME); if (name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) { mMetaList = new TaskList(); mMetaList.setContentByRemoteJSON(object); // load meta data JSONArray jsMetas = client.getTaskList(gid); for (int j = 0; j < jsMetas.length(); j++) { object = (JSONObject) jsMetas.getJSONObject(j); MetaData metaData = new MetaData(); metaData.setContentByRemoteJSON(object); if (metaData.isWorthSaving()) { mMetaList.addChildTask(metaData); if (metaData.getGid() != null) { mMetaHashMap.put(metaData.getRelatedGid(), metaData); } } } } } // create meta list if not existed if (mMetaList == null) { mMetaList = new TaskList(); mMetaList.setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META); GTaskClient.getInstance().createTaskList(mMetaList); } // init task list for (int i = 0; i < jsTaskLists.length(); i++) { JSONObject object = jsTaskLists.getJSONObject(i); String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID); String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME); if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX) && !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) { TaskList tasklist = new TaskList(); tasklist.setContentByRemoteJSON(object); mGTaskListHashMap.put(gid, tasklist); mGTaskHashMap.put(gid, tasklist); // load tasks JSONArray jsTasks = client.getTaskList(gid); for (int j = 0; j < jsTasks.length(); j++) { object = (JSONObject) jsTasks.getJSONObject(j); gid = object.getString(GTaskStringUtils.GTASK_JSON_ID); Task task = new Task(); task.setContentByRemoteJSON(object); if (task.isWorthSaving()) { task.setMetaInfo(mMetaHashMap.get(gid)); tasklist.addChildTask(task); mGTaskHashMap.put(gid, task); } } } } } catch (JSONException e) { Log.e(TAG, e.toString()); e.printStackTrace(); throw new ActionFailureException("initGTaskList: handing JSONObject failed"); } } private void syncContent() throws NetworkFailureException { int syncType; Cursor c = null; String gid; Node node; mLocalDeleteIdMap.clear(); if (mCancelled) { return; } // for local deleted note try { c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(type<>? AND parent_id=?)", new String[] { String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER) }, null); if (c != null) { while (c.moveToNext()) { gid = c.getString(SqlNote.GTASK_ID_COLUMN); node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); doContentSync(Node.SYNC_ACTION_DEL_REMOTE, node, c); } mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN)); } } else { Log.w(TAG, "failed to query trash folder"); } } finally { if (c != null) { c.close(); c = null; } } // sync folder first syncFolder(); // for note existing in database try { c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(type=? AND parent_id<>?)", new String[] { String.valueOf(Notes.TYPE_NOTE), String.valueOf(Notes.ID_TRASH_FOLER) }, NoteColumns.TYPE + " DESC"); if (c != null) { while (c.moveToNext()) { gid = c.getString(SqlNote.GTASK_ID_COLUMN); node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN)); mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid); syncType = node.getSyncAction(c); } else { if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) { // local add syncType = Node.SYNC_ACTION_ADD_REMOTE; } else { // remote delete syncType = Node.SYNC_ACTION_DEL_LOCAL; } } doContentSync(syncType, node, c); } } else { Log.w(TAG, "failed to query existing note in database"); } } finally { if (c != null) { c.close(); c = null; } } // go through remaining items Iterator<Map.Entry<String, Node>> iter = mGTaskHashMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry<String, Node> entry = iter.next(); node = entry.getValue(); doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null); } // mCancelled can be set by another thread, so we neet to check one by // one // clear local delete table if (!mCancelled) { if (!DataUtils.batchDeleteNotes(mContentResolver, mLocalDeleteIdMap)) { throw new ActionFailureException("failed to batch-delete local deleted notes"); } } // refresh local sync id if (!mCancelled) { GTaskClient.getInstance().commitUpdate(); refreshLocalSyncId(); } } private void syncFolder() throws NetworkFailureException { Cursor c = null; String gid; Node node; int syncType; if (mCancelled) { return; } // for root folder try { c = mContentResolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, Notes.ID_ROOT_FOLDER), SqlNote.PROJECTION_NOTE, null, null, null); if (c != null) { c.moveToNext(); gid = c.getString(SqlNote.GTASK_ID_COLUMN); node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); mGidToNid.put(gid, (long) Notes.ID_ROOT_FOLDER); mNidToGid.put((long) Notes.ID_ROOT_FOLDER, gid); // for system folder, only update remote name if necessary if (!node.getName() .equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT)) doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c); } else { doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c); } } else { Log.w(TAG, "failed to query root folder"); } } finally { if (c != null) { c.close(); c = null; } } // for call-note folder try { c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(_id=?)", new String[] { String.valueOf(Notes.ID_CALL_RECORD_FOLDER) }, null); if (c != null) { if (c.moveToNext()) { gid = c.getString(SqlNote.GTASK_ID_COLUMN); node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); mGidToNid.put(gid, (long) Notes.ID_CALL_RECORD_FOLDER); mNidToGid.put((long) Notes.ID_CALL_RECORD_FOLDER, gid); // for system folder, only update remote name if // necessary if (!node.getName() .equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE)) doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c); } else { doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c); } } } else { Log.w(TAG, "failed to query call note folder"); } } finally { if (c != null) { c.close(); c = null; } } // for local existing folders try { c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(type=? AND parent_id<>?)", new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER) }, NoteColumns.TYPE + " DESC"); if (c != null) { while (c.moveToNext()) { gid = c.getString(SqlNote.GTASK_ID_COLUMN); node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN)); mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid); syncType = node.getSyncAction(c); } else { if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) { // local add syncType = Node.SYNC_ACTION_ADD_REMOTE; } else { // remote delete syncType = Node.SYNC_ACTION_DEL_LOCAL; } } doContentSync(syncType, node, c); } } else { Log.w(TAG, "failed to query existing folder"); } } finally { if (c != null) { c.close(); c = null; } } // for remote add folders Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry<String, TaskList> entry = iter.next(); gid = entry.getKey(); node = entry.getValue(); if (mGTaskHashMap.containsKey(gid)) { mGTaskHashMap.remove(gid); doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null); } } if (!mCancelled) GTaskClient.getInstance().commitUpdate(); } private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; } MetaData meta; switch (syncType) { case Node.SYNC_ACTION_ADD_LOCAL: addLocalNode(node); break; case Node.SYNC_ACTION_ADD_REMOTE: addRemoteNode(node, c); break; case Node.SYNC_ACTION_DEL_LOCAL: meta = mMetaHashMap.get(c.getString(SqlNote.GTASK_ID_COLUMN)); if (meta != null) { GTaskClient.getInstance().deleteNode(meta); } mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN)); break; case Node.SYNC_ACTION_DEL_REMOTE: meta = mMetaHashMap.get(node.getGid()); if (meta != null) { GTaskClient.getInstance().deleteNode(meta); } GTaskClient.getInstance().deleteNode(node); break; case Node.SYNC_ACTION_UPDATE_LOCAL: updateLocalNode(node, c); break; case Node.SYNC_ACTION_UPDATE_REMOTE: updateRemoteNode(node, c); break; case Node.SYNC_ACTION_UPDATE_CONFLICT: // merging both modifications maybe a good idea // right now just use local update simply updateRemoteNode(node, c); break; case Node.SYNC_ACTION_NONE: break; case Node.SYNC_ACTION_ERROR: default: throw new ActionFailureException("unkown sync action type"); } } private void addLocalNode(Node node) throws NetworkFailureException { if (mCancelled) { return; } SqlNote sqlNote; if (node instanceof TaskList) { if (node.getName().equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT)) { sqlNote = new SqlNote(mContext, Notes.ID_ROOT_FOLDER); } else if (node.getName() .equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE)) { sqlNote = new SqlNote(mContext, Notes.ID_CALL_RECORD_FOLDER); } else { sqlNote = new SqlNote(mContext); sqlNote.setContent(node.getLocalJSONFromContent()); sqlNote.setParentId(Notes.ID_ROOT_FOLDER); } } else { sqlNote = new SqlNote(mContext); JSONObject js = node.getLocalJSONFromContent(); try { if (js.has(GTaskStringUtils.META_HEAD_NOTE)) { JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE); if (note.has(NoteColumns.ID)) { long id = note.getLong(NoteColumns.ID); if (DataUtils.existInNoteDatabase(mContentResolver, id)) { // the id is not available, have to create a new one note.remove(NoteColumns.ID); } } } if (js.has(GTaskStringUtils.META_HEAD_DATA)) { JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA); for (int i = 0; i < dataArray.length(); i++) { JSONObject data = dataArray.getJSONObject(i); if (data.has(DataColumns.ID)) { long dataId = data.getLong(DataColumns.ID); if (DataUtils.existInDataDatabase(mContentResolver, dataId)) { // the data id is not available, have to create // a new one data.remove(DataColumns.ID); } } } } } catch (JSONException e) { Log.w(TAG, e.toString()); e.printStackTrace(); } sqlNote.setContent(js); Long parentId = mGidToNid.get(((Task) node).getParent().getGid()); if (parentId == null) { Log.e(TAG, "cannot find task's parent id locally"); throw new ActionFailureException("cannot add local node"); } sqlNote.setParentId(parentId.longValue()); } // create the local node sqlNote.setGtaskId(node.getGid()); sqlNote.commit(false); // update gid-nid mapping mGidToNid.put(node.getGid(), sqlNote.getId()); mNidToGid.put(sqlNote.getId(), node.getGid()); // update meta updateRemoteMeta(node.getGid(), sqlNote); } private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; } SqlNote sqlNote; // update the note locally sqlNote = new SqlNote(mContext, c); sqlNote.setContent(node.getLocalJSONFromContent()); Long parentId = (node instanceof Task) ? mGidToNid.get(((Task) node).getParent().getGid()) : new Long(Notes.ID_ROOT_FOLDER); if (parentId == null) { Log.e(TAG, "cannot find task's parent id locally"); throw new ActionFailureException("cannot update local node"); } sqlNote.setParentId(parentId.longValue()); sqlNote.commit(true); // update meta info updateRemoteMeta(node.getGid(), sqlNote); } private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; } SqlNote sqlNote = new SqlNote(mContext, c); Node n; // update remotely if (sqlNote.isNoteType()) { Task task = new Task(); task.setContentByLocalJSON(sqlNote.getContent()); String parentGid = mNidToGid.get(sqlNote.getParentId()); if (parentGid == null) { Log.e(TAG, "cannot find task's parent tasklist"); throw new ActionFailureException("cannot add remote task"); } mGTaskListHashMap.get(parentGid).addChildTask(task); GTaskClient.getInstance().createTask(task); n = (Node) task; // add meta updateRemoteMeta(task.getGid(), sqlNote); } else { TaskList tasklist = null; // we need to skip folder if it has already existed String folderName = GTaskStringUtils.MIUI_FOLDER_PREFFIX; if (sqlNote.getId() == Notes.ID_ROOT_FOLDER) folderName += GTaskStringUtils.FOLDER_DEFAULT; else if (sqlNote.getId() == Notes.ID_CALL_RECORD_FOLDER) folderName += GTaskStringUtils.FOLDER_CALL_NOTE; else folderName += sqlNote.getSnippet(); Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry<String, TaskList> entry = iter.next(); String gid = entry.getKey(); TaskList list = entry.getValue(); if (list.getName().equals(folderName)) { tasklist = list; if (mGTaskHashMap.containsKey(gid)) { mGTaskHashMap.remove(gid); } break; } } // no match we can add now if (tasklist == null) { tasklist = new TaskList(); tasklist.setContentByLocalJSON(sqlNote.getContent()); GTaskClient.getInstance().createTaskList(tasklist); mGTaskListHashMap.put(tasklist.getGid(), tasklist); } n = (Node) tasklist; } // update local note sqlNote.setGtaskId(n.getGid()); sqlNote.commit(false); sqlNote.resetLocalModified(); sqlNote.commit(true); // gid-id mapping mGidToNid.put(n.getGid(), sqlNote.getId()); mNidToGid.put(sqlNote.getId(), n.getGid()); } private void updateRemoteNode(Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; } SqlNote sqlNote = new SqlNote(mContext, c); // update remotely node.setContentByLocalJSON(sqlNote.getContent()); GTaskClient.getInstance().addUpdateNode(node); // update meta updateRemoteMeta(node.getGid(), sqlNote); // move task if necessary if (sqlNote.isNoteType()) { Task task = (Task) node; TaskList preParentList = task.getParent(); String curParentGid = mNidToGid.get(sqlNote.getParentId()); if (curParentGid == null) { Log.e(TAG, "cannot find task's parent tasklist"); throw new ActionFailureException("cannot update remote task"); } TaskList curParentList = mGTaskListHashMap.get(curParentGid); if (preParentList != curParentList) { preParentList.removeChildTask(task); curParentList.addChildTask(task); GTaskClient.getInstance().moveTask(task, preParentList, curParentList); } } // clear local modified flag sqlNote.resetLocalModified(); sqlNote.commit(true); } private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException { if (sqlNote != null && sqlNote.isNoteType()) { MetaData metaData = mMetaHashMap.get(gid); if (metaData != null) { metaData.setMeta(gid, sqlNote.getContent()); GTaskClient.getInstance().addUpdateNode(metaData); } else { metaData = new MetaData(); metaData.setMeta(gid, sqlNote.getContent()); mMetaList.addChildTask(metaData); mMetaHashMap.put(gid, metaData); GTaskClient.getInstance().createTask(metaData); } } } private void refreshLocalSyncId() throws NetworkFailureException { if (mCancelled) { return; } // get the latest gtask list mGTaskHashMap.clear(); mGTaskListHashMap.clear(); mMetaHashMap.clear(); initGTaskList(); Cursor c = null; try { c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(type<>? AND parent_id<>?)", new String[] { String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER) }, NoteColumns.TYPE + " DESC"); if (c != null) { while (c.moveToNext()) { String gid = c.getString(SqlNote.GTASK_ID_COLUMN); Node node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); ContentValues values = new ContentValues(); values.put(NoteColumns.SYNC_ID, node.getLastModified()); mContentResolver.update( ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(SqlNote.ID_COLUMN)), values, null, null); } else { Log.e(TAG, "something is missed"); throw new ActionFailureException("some local items don't have gid after sync"); } } } else { Log.w(TAG, "failed to query local note to refresh sync id"); } } finally { if (c != null) { c.close(); c = null; } } } public String getSyncAccount() { return GTaskClient.getInstance().getSyncAccount().name; } public void cancelSync() { mCancelled = true; } }