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
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config.proxy;
import com.yahoo.log.LogLevel;
import com.yahoo.vespa.config.RawConfig;
import com.yahoo.vespa.config.protocol.JRTServerConfigRequest;
import java.util.concurrent.DelayQueue;
import java.util.logging.Logger;
/**
* Updates clients subscribing to config when config changes or the
* timeout they have specified has elapsed. Not used when in 'memorycache' mode.
*
* @author hmusum
*/
class ClientUpdater {
private final static Logger log = Logger.getLogger(ClientUpdater.class.getName());
private final ConfigProxyStatistics statistics;
private final RpcServer rpcServer;
private final DelayedResponses delayedResponses;
ClientUpdater(RpcServer rpcServer, ConfigProxyStatistics statistics, DelayedResponses delayedResponses) {
this.rpcServer = rpcServer;
this.statistics = statistics;
this.delayedResponses = delayedResponses;
}
/**
* This method will be called when a response with changed config is received from upstream
* (content or generation has changed) or the server timeout has elapsed.
* Updates the cache with the returned config. Will only be called when in default mode
*
* @param config new config
*/
void updateSubscribers(RawConfig config) {
log.log(LogLevel.DEBUG, () -> "Config updated for " + config.getKey() + "," + config.getGeneration());
sendResponse(config);
}
private void sendResponse(RawConfig config) {
if (config.isError()) { statistics.incErrorCount(); }
log.log(LogLevel.DEBUG, () -> "Sending response for " + config.getKey() + "," + config.getGeneration());
DelayQueue<DelayedResponse> responseDelayQueue = delayedResponses.responses();
log.log(LogLevel.SPAM, () -> "Delayed response queue: " + responseDelayQueue);
if (responseDelayQueue.size() == 0) {
log.log(LogLevel.DEBUG, () -> "There exists no matching element on delayed response queue for " + config.getKey());
return;
} else {
log.log(LogLevel.DEBUG, () -> "Delayed response queue has " + responseDelayQueue.size() + " elements");
}
DelayedResponse[] responses = responseDelayQueue.toArray(new DelayedResponse[0]);
boolean found = false;
for (DelayedResponse response : responses) {
JRTServerConfigRequest request = response.getRequest();
if (request.getConfigKey().equals(config.getKey())) {
if (delayedResponses.remove(response)) {
found = true;
log.log(LogLevel.DEBUG, () -> "Call returnOkResponse for " + config.getKey() + "," + config.getGeneration());
rpcServer.returnOkResponse(request, config);
} else {
log.log(LogLevel.INFO, "Could not remove " + config.getKey() + " from delayedResponses queue, already removed");
}
}
}
if (!found) {
log.log(LogLevel.DEBUG, () -> "Found no recipient for " + config.getKey() + " in delayed response queue");
}
log.log(LogLevel.DEBUG, () -> "Finished updating config for " + config.getKey() + "," + config.getGeneration());
}
}
|
