@Override
public void call(final Subscriber<? super T> subscriber) {
final Realm realm = Realm.getInstance(context);
thread = Thread.currentThread();
subscriber.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
if (thread != null && !thread.isInterrupted()) {
thread.interrupt();
}
}
}));
boolean interrupted = false;
boolean withError = false;
T object = null;
try {
realm.beginTransaction();
object = get(realm);
interrupted = thread.isInterrupted();
if (object != null && !interrupted) {
realm.commitTransaction();
} else {
realm.cancelTransaction();
}
} catch (RuntimeException e) {
realm.cancelTransaction();
subscriber.onError(new RealmException("Error during transaction.", e));
withError = true;
} catch (Error e) {
realm.cancelTransaction();
subscriber.onError(e);
withError = true;
}
if (!interrupted && !withError) {
subscriber.onNext(object);
}
try {
realm.close();
} catch (RealmException ex) {
subscriber.onError(ex);
withError = true;
}
thread = null;
if (!withError) {
subscriber.onCompleted();
}
if (interrupted) {
Thread.currentThread().interrupt();
}
}
private static void executeTransaction(Realm realm, Realm.Transaction transaction) {
if (transaction == null) return;
realm.beginTransaction();
try {
transaction.execute(realm);
realm.commitTransaction();
} catch (RuntimeException e) {
realm.cancelTransaction();
Log.e(LOG_TAG, e.getMessage(), e);
throw new RealmException("Error during transaction.", e);
} catch (Error e) {
realm.cancelTransaction();
Log.e(LOG_TAG, e.getMessage(), e);
throw e;
}
}
@Override
public void call(final Subscriber<? super RealmResults<T>> subscriber) {
final Realm realm =
dbName != null ? Realm.getInstance(context, dbName) : Realm.getInstance(context);
subscriber.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
try {
realm.close();
} catch (RealmException ex) {
subscriber.onError(ex);
}
}
}));
RealmResults<T> object;
realm.beginTransaction();
try {
object = get(realm);
realm.commitTransaction();
} catch (RuntimeException e) {
realm.cancelTransaction();
subscriber.onError(new RealmException("Error during transaction.", e));
return;
} catch (Error e) {
realm.cancelTransaction();
subscriber.onError(e);
return;
}
if (object != null) {
subscriber.onNext(object);
}
subscriber.onCompleted();
}
// idをキーにTodoデータを削除
public boolean deleteTodoById(int id) {
// トランザクション開始
realm.beginTransaction();
try {
// idに一致するレコードを削除
realm.where(Todo.class).equalTo(Todo.PRIMARY_KEY, id).findAll().clear();
// コミット
realm.commitTransaction();
} catch (Exception e) {
// ロールバック
realm.cancelTransaction();
return false;
}
return true;
}
// Todoデータを登録
public boolean insertOrUpdateTodo(Todo todo) {
synchronized (this) {
if (todo.getId() == 0) {
// 登録されているTodoデータの最大idを取得し、+1 したものをidとする(つまり連番)
todo.setId(selectTodoMaxId() + 1);
}
// トランザクション開始
realm.beginTransaction();
try {
// idにプライマリキーを張ってあるため既に同一idのデータが存在していれば更新となる
realm.copyToRealmOrUpdate(todo);
// コミット
realm.commitTransaction();
} catch (Exception e) {
// ロールバック
realm.cancelTransaction();
return false;
}
return true;
}
}