blob: aecef879724eb2089c5c4388999ce368f02819d4 (
plain)
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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*
* Copyright 2014 Open Networking Laboratory
*
* 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 org.onosproject.net.intent.constraint;
import com.google.common.annotations.Beta;
import com.google.common.base.MoreObjects;
import org.onosproject.net.Link;
import org.onosproject.net.Path;
import org.onosproject.net.intent.Constraint;
import org.onosproject.net.resource.link.LinkResourceService;
import java.time.Duration;
import java.time.temporal.ChronoUnit;
import java.util.Objects;
import static org.onosproject.net.AnnotationKeys.LATENCY;
import static org.onosproject.net.AnnotationKeys.getAnnotatedValue;
/**
* Constraint that evaluates the latency through a path.
*/
@Beta
public class LatencyConstraint implements Constraint {
private final Duration latency;
/**
* Creates a new constraint to keep under specified latency through a path.
* @param latency latency to be kept
*/
public LatencyConstraint(Duration latency) {
this.latency = latency;
}
// Constructor for serialization
private LatencyConstraint() {
this.latency = Duration.ZERO;
}
public Duration latency() {
return latency;
}
@Override
public double cost(Link link, LinkResourceService resourceService) {
return getAnnotatedValue(link, LATENCY);
}
@Override
public boolean validate(Path path, LinkResourceService resourceService) {
double pathLatency = path.links().stream().mapToDouble(link -> cost(link, resourceService)).sum();
return Duration.of((long) pathLatency, ChronoUnit.MICROS).compareTo(latency) <= 0;
}
@Override
public int hashCode() {
return latency.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof LatencyConstraint)) {
return false;
}
final LatencyConstraint that = (LatencyConstraint) obj;
return Objects.equals(this.latency, that.latency);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this)
.add("latency", latency)
.toString();
}
}
|
