1 /*
2 * #%L
3 * NoOpCallback.java - mongodb-async-driver - Allanbank Consulting, Inc.
4 * %%
5 * Copyright (C) 2011 - 2014 Allanbank Consulting, Inc.
6 * %%
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * #L%
19 */
20
21 package com.allanbank.mongodb.client.callback;
22
23 import com.allanbank.mongodb.client.message.Reply;
24
25 /**
26 * NoOpCallback provides a callback that does nothing.
27 *
28 * @api.no This class is <b>NOT</b> part of the drivers API. This class may be
29 * mutated in incompatible ways between any two releases of the driver.
30 * @copyright 2014, Allanbank Consulting, Inc., All Rights Reserved
31 */
32 public final class NoOpCallback implements ReplyCallback {
33 /** A no-op callback. */
34 public static final NoOpCallback NO_OP = new NoOpCallback();
35
36 /**
37 * {@inheritDoc}
38 * <p>
39 * Overridden to do nothing.
40 * </p>
41 */
42 @Override
43 public void callback(final Reply result) {
44 // Nothing.
45 }
46
47 /**
48 * {@inheritDoc}
49 * <p>
50 * Overridden to do nothing.
51 * </p>
52 */
53 @Override
54 public void exception(final Throwable thrown) {
55 // Nothing.
56 }
57
58 /**
59 * {@inheritDoc}
60 * <p>
61 * Overridden to return true.
62 * </p>
63 */
64 @Override
65 public boolean isLightWeight() {
66 return true;
67 }
68 }