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New Alpha release 1.0.3
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196 changes: 196 additions & 0 deletions
196
app/src/main/java/iiitd/mc/timetracker/database/CachedDatabaseController.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,196 @@ | ||
| package iiitd.mc.timetracker.database; | ||
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| import android.content.Context; | ||
| import android.database.SQLException; | ||
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| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.Collections; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
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| import iiitd.mc.timetracker.model.Recording; | ||
| import iiitd.mc.timetracker.model.Task; | ||
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| /** | ||
| * Wrapper for DatabaseController that caches the Records and Tasks list in memory for faster access. | ||
| */ | ||
| public class CachedDatabaseController implements IDatabaseController { | ||
| private IDatabaseController db; | ||
| /* in-memory caches of data. to invalidate clear the map. */ | ||
| private boolean cachedTasksComplete = false; | ||
| private HashMap<Long, Task> cachedTasks = new HashMap<>(); | ||
| private boolean cachedRecordingsComplete = false; | ||
| private HashMap<Long, Recording> cachedRecordings = new HashMap<>(); | ||
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| public CachedDatabaseController(Context context) { | ||
| db = new DatabaseController(context); | ||
| } | ||
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| @Override | ||
| public IDatabaseController open() throws SQLException { | ||
| db.open(); | ||
| return this; | ||
| } | ||
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| @Override | ||
| public void close() { | ||
| db.close(); | ||
| } | ||
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| @Override | ||
| public void insertTask(Task newTask) { | ||
| db.insertTask(newTask); | ||
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| cachedTasks.put(newTask.getId(), newTask); | ||
| } | ||
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| @Override | ||
| public Task getTask(long id) { | ||
| Task task = cachedTasks.get(id); | ||
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| if (task == null && !cachedTasksComplete) { | ||
| task = db.getTask(id); | ||
| cachedTasks.put(id, task); | ||
| } | ||
|
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| return task; | ||
| } | ||
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| @Override | ||
| public List<Task> getTasks() { | ||
| if (!cachedTasksComplete) { | ||
| List<Task> tasks = db.getTasks(); | ||
| for (Task t : tasks) { | ||
| cachedTasks.put(t.getId(), t); | ||
| } | ||
| cachedTasksComplete = true; | ||
| } | ||
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| return new ArrayList<>(cachedTasks.values()); | ||
| } | ||
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| @Override | ||
| public List<Task> getTasks(String name) { | ||
| //TODO: Cache name searches? | ||
| return db.getTasks(name); | ||
| } | ||
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| @Override | ||
| public void updateTask(Task updatedTask) { | ||
| db.updateTask(updatedTask); | ||
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| cachedTasks.put(updatedTask.getId(), updatedTask); | ||
| } | ||
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| @Override | ||
| public void deleteTask(long id) { | ||
| db.deleteTask(id); | ||
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| cachedTasks.remove(id); | ||
| } | ||
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| @Override | ||
| public void deleteTask(Task removedTask) { | ||
| deleteTask(removedTask.getId()); | ||
| } | ||
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| @Override | ||
| public void insertRecording(Recording newRecording) { | ||
| db.insertRecording(newRecording); | ||
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| cachedRecordings.put(newRecording.getRecordingId(), newRecording); | ||
| } | ||
|
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| @Override | ||
| public Recording getRecording(long recordingId) { | ||
| Recording recording = cachedRecordings.get(recordingId); | ||
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| if (recording == null && !cachedRecordingsComplete) { | ||
| recording = db.getRecording(recordingId); | ||
| cachedRecordings.put(recordingId, recording); | ||
| } | ||
|
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| return recording; | ||
| } | ||
|
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| @Override | ||
| public List<Recording> getRecordings() { | ||
| if (cachedRecordingsComplete) { | ||
| return convertToSortedList(cachedRecordings.values()); | ||
| } else { | ||
| List<Recording> recordings = db.getRecordings(); | ||
| for (Recording r : recordings) { | ||
| cachedRecordings.put(r.getRecordingId(), r); | ||
| } | ||
| cachedRecordingsComplete = true; | ||
| return recordings; | ||
| } | ||
| } | ||
|
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| private List<Recording> convertToSortedList(Collection<Recording> recordingValues) { | ||
| List<Recording> recordings = new ArrayList<>(recordingValues); | ||
| Collections.sort(recordings); | ||
| return recordings; | ||
| } | ||
|
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| @Override | ||
| public List<Recording> getRecordings(int limit) { | ||
| //TODO: Cache limit recordings search? | ||
| return db.getRecordings(limit); | ||
| } | ||
|
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| @Override | ||
| public List<Recording> getRecordings(long date) { | ||
| //TODO: Cache date recordings search? | ||
| return db.getRecordings(date); | ||
| } | ||
|
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| @Override | ||
| public List<Recording> getRecordings(long start, long end) { | ||
| //TODO: Cache limit recordings search? | ||
| return db.getRecordings(start, end); | ||
| } | ||
|
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| @Override | ||
| public List<Recording> getRecordings(long taskid, long start, long end) { | ||
| //TODO: Cache task and time recordings search? | ||
| return db.getRecordings(taskid, start, end); | ||
| } | ||
|
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| @Override | ||
| public void updateRecording(Recording updatedRecording) { | ||
| db.updateRecording(updatedRecording); | ||
|
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| cachedRecordings.put(updatedRecording.getRecordingId(), updatedRecording); | ||
| } | ||
|
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| @Override | ||
| public void deleteRecording(long id) { | ||
| db.deleteRecording(id); | ||
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| cachedRecordings.remove(id); | ||
| } | ||
|
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| @Override | ||
| public void deleteRecording(Recording removedRecording) { | ||
| deleteRecording(removedRecording.getRecordingId()); | ||
| } | ||
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| @Override | ||
| public List<Task> getSubTasks(long id) { | ||
| //TODO: Cache subtask requests? | ||
| return db.getSubTasks(id); | ||
| } | ||
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| @Override | ||
| public void resetDatabase() { | ||
| db.resetDatabase(); | ||
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| cachedTasks.clear(); | ||
| cachedTasksComplete = false; | ||
| cachedRecordings.clear(); | ||
| cachedRecordingsComplete = false; | ||
| } | ||
| } |
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