blob: 6c926d88469783d0da263e04927296cebf9ed342 (
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
|
/*
* 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.provider;
import static com.google.common.base.Preconditions.checkState;
/**
* Base implementation of a provider service, which tracks the provider to
* which it is issued and can be invalidated.
*
* @param <P> type of the information provider
*/
public abstract class AbstractProviderService<P extends Provider> implements ProviderService<P> {
private boolean isValid = true;
private final P provider;
/**
* Creates a provider service on behalf of the specified provider.
*
* @param provider provider to which this service is being issued
*/
protected AbstractProviderService(P provider) {
this.provider = provider;
}
/**
* Invalidates this provider service.
*/
public void invalidate() {
isValid = false;
}
/**
* Checks the validity of this provider service.
*
* @throws java.lang.IllegalStateException if the service is no longer valid
*/
public void checkValidity() {
checkState(isValid, "Provider service is no longer valid");
}
@Override
public P provider() {
return provider;
}
}
|