com.github.cyf1997.uid.worker.DisposableWorkerIdAssigner Maven / Gradle / Ivy
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/*
* Copyright (c) 2017 Baidu, Inc. All Rights Reserve.
*
* 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.
*/
package com.github.cyf1997.uid.worker;
import com.github.cyf1997.uid.utils.DockerUtils;
import com.github.cyf1997.uid.utils.NetUtils;
import com.github.cyf1997.uid.worker.dao.WorkerNodeDAO;
import com.github.cyf1997.uid.worker.entity.WorkerNodeEntity;
import org.apache.commons.lang3.RandomUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.transaction.annotation.Transactional;
import javax.annotation.Resource;
/**
* Represents an implementation of {@link WorkerIdAssigner},
* the worker id will be discarded after assigned to the UidGenerator
*
* @author yutianbao
*/
public class DisposableWorkerIdAssigner implements WorkerIdAssigner {
private static final Logger LOGGER = LoggerFactory.getLogger(DisposableWorkerIdAssigner.class);
@Resource
private WorkerNodeDAO workerNodeDAO;
/**
* Assign worker id base on database.
* If there is host name & port in the environment, we considered that the node runs in Docker container
* Otherwise, the node runs on an actual machine.
*
* @return assigned worker id
*/
@Override
@Transactional
public long assignWorkerId() {
// build worker node entity
WorkerNodeEntity workerNodeEntity = buildWorkerNode();
// add worker node for new (ignore the same IP + PORT)
workerNodeDAO.addWorkerNode(workerNodeEntity);
LOGGER.info("Add worker node:" + workerNodeEntity);
return workerNodeEntity.getId();
}
/**
* Build worker node entity by IP and PORT
*/
private WorkerNodeEntity buildWorkerNode() {
WorkerNodeEntity workerNodeEntity = new WorkerNodeEntity();
if (DockerUtils.isDocker()) {
workerNodeEntity.setType(WorkerNodeType.CONTAINER.value());
workerNodeEntity.setHostName(DockerUtils.getDockerHost());
workerNodeEntity.setPort(DockerUtils.getDockerPort());
} else {
workerNodeEntity.setType(WorkerNodeType.ACTUAL.value());
workerNodeEntity.setHostName(NetUtils.getLocalAddress());
workerNodeEntity.setPort(System.currentTimeMillis() + "-" + RandomUtils.nextInt(0,100000));
}
return workerNodeEntity;
}
}