/*
* Copyright 1999-2015 dangdang.com.
* <p>
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* </p>
*/
package com.dangdang.ddframe.job.lite.internal.server;
import com.dangdang.ddframe.job.lite.internal.instance.InstanceNode;
import com.dangdang.ddframe.job.lite.internal.schedule.JobRegistry;
import com.dangdang.ddframe.job.lite.internal.storage.JobNodeStorage;
import com.dangdang.ddframe.job.reg.base.CoordinatorRegistryCenter;
import java.util.List;
/**
* 作业服务器服务.
*
* @author zhangliang
* @author caohao
*/
public final class ServerService {
private final String jobName;
private final JobNodeStorage jobNodeStorage;
private final ServerNode serverNode;
public ServerService(final CoordinatorRegistryCenter regCenter, final String jobName) {
this.jobName = jobName;
jobNodeStorage = new JobNodeStorage(regCenter, jobName);
serverNode = new ServerNode(jobName);
}
/**
* 持久化作业服务器上线信息.
*
* @param enabled 作业是否启用
*/
public void persistOnline(final boolean enabled) {
if (!JobRegistry.getInstance().isShutdown(jobName)) {
jobNodeStorage.fillJobNode(serverNode.getServerNode(JobRegistry.getInstance().getJobInstance(jobName).getIp()), enabled ? "" : ServerStatus.DISABLED.name());
}
}
/**
* 获取是否还有可用的作业服务器.
*
* @return 是否还有可用的作业服务器
*/
public boolean hasAvailableServers() {
List<String> servers = jobNodeStorage.getJobNodeChildrenKeys(ServerNode.ROOT);
for (String each : servers) {
if (isAvailableServer(each)) {
return true;
}
}
return false;
}
/**
* 判断作业服务器是否可用.
*
* @param ip 作业服务器IP地址
* @return 作业服务器是否可用
*/
public boolean isAvailableServer(final String ip) {
return isEnableServer(ip) && hasOnlineInstances(ip);
}
private boolean hasOnlineInstances(final String ip) {
for (String each : jobNodeStorage.getJobNodeChildrenKeys(InstanceNode.ROOT)) {
if (each.startsWith(ip)) {
return true;
}
}
return false;
}
/**
* 判断服务器是否启用.
*
* @param ip 作业服务器IP地址
* @return 服务器是否启用
*/
public boolean isEnableServer(final String ip) {
return !ServerStatus.DISABLED.name().equals(jobNodeStorage.getJobNodeData(serverNode.getServerNode(ip)));
}
}