forked from netty/netty
-
Notifications
You must be signed in to change notification settings - Fork 2
/
UnaryPromiseNotifier.java
56 lines (51 loc) · 2.18 KB
/
UnaryPromiseNotifier.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
/*
* Copyright 2016 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* https://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 io.netty.util.concurrent;
import io.netty.util.internal.ObjectUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
/**
*
* @deprecated use {@link PromiseNotifier#cascade(boolean, Future, Promise)}.
*/
@Deprecated
public final class UnaryPromiseNotifier<T> implements FutureListener<T> {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(UnaryPromiseNotifier.class);
private final Promise<? super T> promise;
public UnaryPromiseNotifier(Promise<? super T> promise) {
this.promise = ObjectUtil.checkNotNull(promise, "promise");
}
@Override
public void operationComplete(Future<T> future) throws Exception {
cascadeTo(future, promise);
}
public static <X> void cascadeTo(Future<X> completedFuture, Promise<? super X> promise) {
if (completedFuture.isSuccess()) {
if (!promise.trySuccess(completedFuture.getNow())) {
logger.warn("Failed to mark a promise as success because it is done already: {}", promise);
}
} else if (completedFuture.isCancelled()) {
if (!promise.cancel(false)) {
logger.warn("Failed to cancel a promise because it is done already: {}", promise);
}
} else {
if (!promise.tryFailure(completedFuture.cause())) {
logger.warn("Failed to mark a promise as failure because it's done already: {}", promise,
completedFuture.cause());
}
}
}
}