LimitMaxJobsService.java

package com.vip.saturn.job.executor;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.vip.saturn.job.basic.AbstractSaturnService;
import com.vip.saturn.job.basic.JobScheduler;
import com.vip.saturn.job.sharding.node.SaturnExecutorsNode;
import com.vip.saturn.job.utils.SystemEnvProperties;

/**
 * 
 * @author xiaopeng.he
 *
 */
public class LimitMaxJobsService extends AbstractSaturnService {
	static Logger log = LoggerFactory.getLogger(LimitMaxJobsService.class);

	public LimitMaxJobsService(final JobScheduler jobScheduler) {
		super(jobScheduler);
	}
	
	/**
	 * 如果当前作业为新增作业，而且超出该域最大作业数量限制，将打印警告日志，返回false；否则返回true。
	 * @param jobName 新增作业名
	 * @return 是否超出
	 */
	public boolean check(String jobName) {
		List<String> childrenKeys = coordinatorRegistryCenter.getChildrenKeys(SaturnExecutorsNode.$JOBSNODE_PATH);
		if(childrenKeys != null && !childrenKeys.isEmpty() && !childrenKeys.contains(jobName) && childrenKeys.size() >= SystemEnvProperties.VIP_SATURN_MAX_NUMBER_OF_JOBS) { 
			log.warn("The jobs that are under the namespace exceed {}", SystemEnvProperties.VIP_SATURN_MAX_NUMBER_OF_JOBS);
			return false;
		}
		return true;
	}
}