Nacos配置中心更改變更配置後，異步http通知其他集羣更新配置。同時當客戶端（ClientWorker）心跳的時候檢查配置是否改變checkListenerMd5，改變了就發佈監聽事件RefreshEvent執行監聽器RefreshEventListener 最後執行ContextRefresher的refreshEnvironment刷新配置，當然對於@Value @RefreshScope的值會熱更新，具體沒看，有時間更新看看，做一記錄於此。
public synchronized Set<String> refreshEnvironment() {
Map<String, Object> before = extract(
this.context.getEnvironment().getPropertySources());
addConfigFilesToEnvironment();
Set<String> keys = changes(before,
extract(this.context.getEnvironment().getPropertySources())).keySet();
this.context.publishEvent(new EnvironmentChangeEvent(this.context, keys));
return keys;
}
配置變更接口：/nacos/v1/cs/configs
獲取註冊中心服務信息：
private static final Executor EXECUTOR = Executors.newScheduledThreadPool(100, new NotifyThreadFactory());
Queue<NotifySingleTask> queue = new LinkedList<NotifySingleTask>();
for (int i = 0; i < ipList.size(); i++) {
queue.add(new NotifySingleTask(dataId, group, tenant, tag, dumpTs, (String) ipList.get(i), evt.isBeta));
}
EXECUTOR.execute(new AsyncTask(httpclient, queue));
http異步調用服務端接口，更新配置：
private CloseableHttpAsyncClient httpclient = HttpAsyncClients.custom()
.setDefaultRequestConfig(requestConfig).build();
AsyncTask包含失敗重試
class AsyncTask implements Runnable {
public AsyncTask(CloseableHttpAsyncClient httpclient, Queue<NotifySingleTask> queue) {
this.httpclient = httpclient;
this.queue = queue;
}
@Override
public void run() {
executeAsyncInvoke();
}
private void executeAsyncInvoke() {
while (!queue.isEmpty()) {
NotifySingleTask task = queue.poll();
String targetIp = task.getTargetIP();
if (serverListService.getServerList().contains(
targetIp)) {
// 啓動健康檢查且有不監控的ip則直接把放到通知隊列，否則通知
if (serverListService.isHealthCheck()
&& ServerListService.getServerListUnhealth().contains(targetIp)) {
// target ip 不健康，則放入通知列表中
ConfigTraceService.logNotifyEvent(task.getDataId(), task.getGroup(), task.getTenant(), null,
task.getLastModified(),
LOCAL_IP, ConfigTraceService.NOTIFY_EVENT_UNHEALTH, 0, task.target);
// get delay time and set fail count to the task
asyncTaskExecute(task);
} else {
HttpGet request = new HttpGet(task.url);
request.setHeader(NotifyService.NOTIFY_HEADER_LAST_MODIFIED,
String.valueOf(task.getLastModified()));
request.setHeader(NotifyService.NOTIFY_HEADER_OP_HANDLE_IP, LOCAL_IP);
if (task.isBeta) {
request.setHeader("isBeta", "true");
}
httpclient.execute(request, new AsyncNotifyCallBack(httpclient, task));
}
}
}
}
private Queue<NotifySingleTask> queue;
private CloseableHttpAsyncClient httpclient;
}
private void asyncTaskExecute(NotifySingleTask task) {
int delay = getDelayTime(task);
Queue<NotifySingleTask> queue = new LinkedList<NotifySingleTask>();
queue.add(task);
AsyncTask asyncTask = new AsyncTask(httpclient, queue);
((ScheduledThreadPoolExecutor) EXECUTOR).schedule(asyncTask, delay, TimeUnit.MILLISECONDS);
}