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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; } }





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