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
94
95
96
97
|
/*
* ============LICENSE_START=======================================================
* PNF-REGISTRATION-HANDLER
* ================================================================================
* Copyright (C) 2019 NOKIA Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.services.prh.configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.cloud.context.environment.EnvironmentChangeEvent;
import org.springframework.cloud.context.refresh.ContextRefresher;
import org.springframework.context.event.EventListener;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;
import reactor.core.Disposable;
import reactor.core.publisher.Flux;
import reactor.core.scheduler.Scheduler;
import reactor.core.scheduler.Schedulers;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import java.time.Duration;
@Component
public class CbsConfigRefreshScheduler {
private static final Logger LOGGER = LoggerFactory.getLogger(CbsConfigRefreshScheduler.class);
private static final String CBS_UPDATES_INTERVAL_PROPERTY = "cbs.updates-interval";
private static final Duration NO_UPDATES = Duration.ZERO;
private final ContextRefresher contextRefresher;
private final Environment environment;
private final Scheduler scheduler;
private volatile Disposable refreshEventsStreamHandle;
public CbsConfigRefreshScheduler(ContextRefresher contextRefresher, Environment environment) {
this.contextRefresher = contextRefresher;
this.environment = environment;
this.scheduler = Schedulers.newElastic("conf-updates");
}
@PostConstruct
public void startPollingForCbsUpdates() {
startPollingForCbsUpdates(getCbsUpdatesInterval());
}
private void startPollingForCbsUpdates(Duration updatesInterval) {
if (!updatesInterval.equals(NO_UPDATES)) {
LOGGER.info("Configuring pulling for CBS updates in every {}", updatesInterval);
refreshEventsStreamHandle = Flux.interval(updatesInterval, scheduler)
.doOnNext(i -> {
LOGGER.debug("Requesting context refresh");
contextRefresher.refresh();
})
.onErrorContinue((e, o) -> LOGGER.error("Failed fetching config updates from CBS", e))
.subscribe();
}
}
@EventListener
public void onEnvironmentChanged(EnvironmentChangeEvent event) {
if (event.getKeys().contains(CBS_UPDATES_INTERVAL_PROPERTY)) {
LOGGER.info("CBS config polling interval changed to {}", environment.getProperty(CBS_UPDATES_INTERVAL_PROPERTY));
stopPollingForCbsUpdates();
startPollingForCbsUpdates(getCbsUpdatesInterval());
}
}
private Duration getCbsUpdatesInterval() {
return environment.getProperty(CBS_UPDATES_INTERVAL_PROPERTY, Duration.class, NO_UPDATES);
}
@PreDestroy
private void stopPollingForCbsUpdates() {
if(refreshEventsStreamHandle != null) {
LOGGER.debug("Stopping pulling for CBS updates");
refreshEventsStreamHandle.dispose();
}
}
}
|
