Nacos深入浅出（四）
作者：互联网
private void executeAsyncInvoke() {
while (!queue.isEmpty()) {
NotifySingleTask task = queue.poll();
String targetIp = task.getTargetIP();
if (serverListService.getServerList().contains(
targetIp)) {
// 启动健康检查且有不监控的ip则直接把放到通知队列，否则通知
if (serverListService.isHealthCheck()
&& ServerListService.getServerListUnhealth().contains(targetIp)) {
// target ip 不健康，则放入通知列表中
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
int delay = getDelayTime(task);
Queue<NotifySingleTask> queue = new LinkedList<NotifySingleTask>();
queue.add(task);
AsyncTask asyncTask = new AsyncTask(httpclient, queue);
((ScheduledThreadPoolExecutor)EXCUTOR).schedule(asyncTask, delay, TimeUnit.MILLISECONDS);
} 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 AyscNotifyCallBack(httpclient, task));
}
}
}
}
request中的内容debug出来
http://10.129.13.96:8848/nacos/v1/cs/communication/dataChange?dataId=springboot2-nacos-config&group=DEFAULT_GROUP
这里又发了一个请求出去，跳转到/communication/dataChange这个里面去，继续跟进，
这个请求转发到
CommunicationController.java中来了
/**
* 通知配置信息改变
*/
@RequestMapping(value = "/dataChange", method = RequestMethod.GET)
@ResponseBody
public Boolean notifyConfigInfo(HttpServletRequest request, HttpServletResponse response,
@RequestParam("dataId") String dataId, @RequestParam("group") String group,
@RequestParam(value = "tenant", required = false, defaultValue = StringUtils.EMPTY)
String tenant,
@RequestParam(value = "tag", required = false) String tag) {
dataId = dataId.trim();
group = group.trim();
String lastModified = request.getHeader(NotifyService.NOTIFY_HEADER_LAST_MODIFIED);
long lastModifiedTs = StringUtils.isEmpty(lastModified) ? -1 : Long.parseLong(lastModified);
String handleIp = request.getHeader(NotifyService.NOTIFY_HEADER_OP_HANDLE_IP);
String isBetaStr = request.getHeader("isBeta");
if (StringUtils.isNotBlank(isBetaStr) && trueStr.equals(isBetaStr)) {
dumpService.dump(dataId, group, tenant, lastModifiedTs, handleIp, true);
} else {
dumpService.dump(dataId, group, tenant, tag, lastModifiedTs, handleIp);
}
return true;
}
TaskManager.java
/**
* 将任务加入到任务Map中
*
* @param type
* @param task
*/
public void addTask(String type, AbstractTask task) {
this.lock.lock();
try {
AbstractTask oldTask = tasks.put(type, task);
MetricsMonitor.getDumpTaskMonitor().set(tasks.size());
if (null != oldTask) {
task.merge(oldTask);
}
} finally {
this.lock.unlock();
}
}
task具体内容如下
这目前为止，Nacos的整个思路就是把每一个需要通知的操作，封装成一个task,直接把这个task扔到一个队列里面去，然后这个队列在不断的循环去poll,
只要队列里面有东西，就去执行这个task对应的processor;
TaskManager.java
这个类就是我们最终的处理类，真正去做通知更新的管理类，上代码，这里就不贴整个类了，局部展示，
public final class TaskManager implements TaskManagerMBean {
class ProcessRunnable implements Runnable {
public void run() {
while (!TaskManager.this.closed.get()) {
try {
Thread.sleep(100);
TaskManager.this.process();
} catch (Throwable e) {
}
}
}
}
这里面起了一个线程，只要没有关闭，就死循环去执行process；
protected void process() {
for (Map.Entry<String, AbstractTask> entry : this.tasks.entrySet()) {
AbstractTask task = null;
this.lock.lock();
try {
// 获取任务
task = entry.getValue();
if (null != task) {
if (!task.shouldProcess()) {
// 任务当前不需要被执行，直接跳过
continue;
}
// 先将任务从任务Map中删除
this.tasks.remove(entry.getKey());
MetricsMonitor.getDumpTaskMonitor().set(tasks.size());
}
} finally {
this.lock.unlock();
}
if (null != task) {
// 获取任务处理器
TaskProcessor processor = this.taskProcessors.get(entry.getKey());
if (null == processor) {
// 如果没有根据任务类型设置的处理器，使用默认处理器
processor = this.getDefaultTaskProcessor();
}
if (null != processor) {
boolean result = false;
try {
// 处理任务
result = processor.process(entry.getKey(), task);
} catch (Throwable t) {
log.error("task_fail", "处理task失败", t);
}
if (!result) {
// 任务处理失败，设置最后处理时间
task.setLastProcessTime(System.currentTimeMillis());
// 将任务重新加入到任务Map中
this.addTask(entry.getKey(), task);
}
}
}
}
重点！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！
class DumpProcessor implements TaskProcessor {
DumpProcessor(DumpService dumpService) {
this.dumpService = dumpService;
}
@Override
public boolean process(String taskType, AbstractTask task) {
DumpTask dumpTask = (DumpTask)task;
String[] pair = GroupKey2.parseKey(dumpTask.groupKey);
String dataId = pair[0];
String group = pair[1];
String tenant = pair[2];
long lastModified = dumpTask.lastModified;
String handleIp = dumpTask.handleIp;
boolean isBeta = dumpTask.isBeta;
String tag = dumpTask.tag;
if (isBeta) {
// beta发布，则dump数据，更新beta缓存
ConfigInfo4Beta cf = dumpService.persistService.findConfigInfo4Beta(dataId, group, tenant);
boolean result;
if (null != cf) {
result = ConfigService.dumpBeta(dataId, group, tenant, cf.getContent(), lastModified, cf.getBetaIps());
if (result) {
ConfigTraceService.logDumpEvent(dataId, group, tenant, null, lastModified, handleIp,
ConfigTraceService.DUMP_EVENT_OK, System.currentTimeMillis() - lastModified,
cf.getContent().length());
}
} else {
result = ConfigService.removeBeta(dataId, group, tenant);
if (result) {
ConfigTraceService.logDumpEvent(dataId, group, tenant, null, lastModified, handleIp,
ConfigTraceService.DUMP_EVENT_REMOVE_OK, System.currentTimeMillis() - lastModified, 0);
}
}
return result;
} else {
if (StringUtils.isBlank(tag)) {
ConfigInfo cf = dumpService.persistService.findConfigInfo(dataId, group, tenant);
if (dataId.equals(AggrWhitelist.AGGRIDS_METADATA)) {
if (null != cf) {
AggrWhitelist.load(cf.getContent());
} else {
AggrWhitelist.load(null);
}
}
if (dataId.equals(ClientIpWhiteList.CLIENT_IP_WHITELIST_METADATA)) {
if (null != cf) {
ClientIpWhiteList.load(cf.getContent());
} else {
ClientIpWhiteList.load(null);
}
}
if (dataId.equals(SwitchService.SWITCH_META_DATAID)) {
if (null != cf) {
SwitchService.load(cf.getContent());
} else {
SwitchService.load(null);
}
}
boolean result;
if (null != cf) {
result = ConfigService.dump(dataId, group, tenant, cf.getContent(), lastModified);
if (result) {
ConfigTraceService.logDumpEvent(dataId, group, tenant, null, lastModified, handleIp,
ConfigTraceService.DUMP_EVENT_OK, System.currentTimeMillis() - lastModified,
cf.getContent().length());
}
} else {
result = ConfigService.remove(dataId, group, tenant);
if (result) {
ConfigTraceService.logDumpEvent(dataId, group, tenant, null, lastModified, handleIp,
ConfigTraceService.DUMP_EVENT_REMOVE_OK, System.currentTimeMillis() - lastModified, 0);
}
}
return result;
} else {
ConfigInfo4Tag cf = dumpService.persistService.findConfigInfo4Tag(dataId, group, tenant, tag);
//
boolean result;
if (null != cf) {
result = ConfigService.dumpTag(dataId, group, tenant, tag, cf.getContent(), lastModified);
if (result) {
ConfigTraceService.logDumpEvent(dataId, group, tenant, null, lastModified, handleIp,
ConfigTraceService.DUMP_EVENT_OK, System.currentTimeMillis() - lastModified,
cf.getContent().length());
}
} else {
result = ConfigService.removeTag(dataId, group, tenant, tag);
if (result) {
ConfigTraceService.logDumpEvent(dataId, group, tenant, null, lastModified, handleIp,
ConfigTraceService.DUMP_EVENT_REMOVE_OK, System.currentTimeMillis() - lastModified, 0);
}
}
return result;
}
}
}
final DumpService dumpService;
}
标签：dataId,task,group,lastModified,深入浅出,Nacos,result,null 来源： https://www.cnblogs.com/longxok/p/11015309.html