package tech.powerjob.server.remote.worker.selector.impl;
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import com.google.common.collect.Lists;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.commons.lang3.StringUtils;
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import org.springframework.stereotype.Component;
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import tech.powerjob.common.enums.DispatchStrategy;
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import tech.powerjob.common.utils.CollectionUtils;
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import tech.powerjob.server.common.module.WorkerInfo;
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import tech.powerjob.server.persistence.remote.model.InstanceInfoDO;
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import tech.powerjob.server.persistence.remote.model.JobInfoDO;
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import tech.powerjob.server.remote.worker.selector.TaskTrackerSelector;
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import tech.powerjob.server.remote.worker.utils.SpecifyUtils;
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import java.util.List;
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import java.util.concurrent.ThreadLocalRandom;
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/**
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* 指定工作的主节点,大规模运算需要隔离主节点,以防止 worker 部署打断整体的任务执行
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*
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* @author tjq
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* @since 2024/2/24
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*/
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@Slf4j
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@Component
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public class SpecifyTaskTrackerSelector implements TaskTrackerSelector {
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@Override
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public DispatchStrategy strategy() {
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return DispatchStrategy.SPECIFY;
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}
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@Override
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public WorkerInfo select(JobInfoDO jobInfoDO, InstanceInfoDO instanceInfoDO, List<WorkerInfo> availableWorkers) {
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String dispatchStrategyConfig = jobInfoDO.getDispatchStrategyConfig();
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// 降级到随机
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if (StringUtils.isEmpty(dispatchStrategyConfig)) {
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log.warn("[SpecifyTaskTrackerSelector] job[id={}]'s dispatchStrategyConfig is empty, use random as bottom DispatchStrategy!", jobInfoDO.getId());
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return availableWorkers.get(ThreadLocalRandom.current().nextInt(availableWorkers.size()));
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}
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List<WorkerInfo> targetWorkers = Lists.newArrayList();
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availableWorkers.forEach(aw -> {
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boolean match = SpecifyUtils.match(aw, dispatchStrategyConfig);
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if (match) {
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targetWorkers.add(aw);
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}
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});
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if (CollectionUtils.isEmpty(targetWorkers)) {
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log.warn("[SpecifyTaskTrackerSelector] Unable to find available nodes based on conditions for job(id={},dispatchStrategyConfig={}), use random as bottom DispatchStrategy!", jobInfoDO.getId(), dispatchStrategyConfig);
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return availableWorkers.get(ThreadLocalRandom.current().nextInt(availableWorkers.size()));
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}
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// 如果有多个 worker 符合条件,最终还是随机选择出一个
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return targetWorkers.get(ThreadLocalRandom.current().nextInt(targetWorkers.size()));
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}
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}
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