// 分配任务和结果提交处理由于是单线程处理，
// 因此本身不用做状态池并发控制，将消耗较多的发送操作交给ServerConnector多线程操作
@Override
public void getUnDoJobTasks(GetTaskRequestEvent requestEvent) {
String jobName = requestEvent.getJobName();
int jobCount = requestEvent.getRequestJobCount();
final List<JobTask> jobTasks = new ArrayList<JobTask>();
// 如果关闭，则直接返回一个空的JobTask的list给slave
if (this.stopped) {
masterNode.echoGetJobTasks(requestEvent.getSequence(), jobTasks, requestEvent.getChannel());
return;
}
// 指定job
if (jobName != null && jobs.containsKey(jobName)) {
Job job = jobs.get(jobName);
List<JobTask> tasks = job.getJobTasks();
for (JobTask jobTask : tasks) {
if (jobTask.getStatus().equals(JobTaskStatus.UNDO)) {
if (statusPool.replace(jobTask.getTaskId(), JobTaskStatus.UNDO, JobTaskStatus.DOING)) {
this.allocateTask(jobTask);
jobTasks.add(jobTask);
if (jobTasks.size() == jobCount) break;
}
}
}
} else {
Iterator<JobTask> taskIter = undoTaskQueue.iterator();
while (taskIter.hasNext()) {
// String taskId = taskIds.next();
// JobTask jobTask = jobTaskPool.get(taskId);
JobTask jobTask = taskIter.next();
if (!jobTaskPool.keySet().contains(jobTask.getTaskId())
|| jobs.get(jobTask.getJobName()).getEpoch().get() > jobTask.getJobEpoch()
|| jobs.get(jobTask.getJobName()).getJobTimeOut().get()) {
taskIter.remove();
continue;
}
if (statusPool.get(jobTask.getTaskId()).equals(JobTaskStatus.UNDO)) {
if (statusPool.replace(jobTask.getTaskId(), JobTaskStatus.UNDO, JobTaskStatus.DOING)) {
this.allocateTask(jobTask);
jobTasks.add(jobTask);
taskIter.remove();
if (jobTasks.size() >= jobCount) break;
}
} else taskIter.remove();
}
}
// 是否需要用异步方式发送，减少对jobManager事件处理延时
if (config.isUseAsynModeToSendResponse()) {
final String sequence = requestEvent.getSequence();
final Object channel = requestEvent.getChannel();
// 由于该操作比较慢，开线程执行，保证速度
eventProcessThreadPool.execute(
new Runnable() {
public void run() {
try {
masterNode.echoGetJobTasks(sequence, jobTasks, channel);
} catch (Throwable e) {
logger.error(e);
}
}
});
} else
masterNode.echoGetJobTasks(requestEvent.getSequence(), jobTasks, requestEvent.getChannel());
}
