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本文主要研究一下powerjob的执行机器地址(designatedWorkers)

SaveJobInfoRequest

powerjob-common/src/main/java/tech/powerjob/common/request/http/SaveJobInfoRequest.java

@Data
public class SaveJobInfoRequest {

    /**
     * id of the job. set null to create or non-null to update the job.
     */
    private Long id;

    //......

    /* ************************** PowerJob-worker cluster property ************************** */
    /**
     * Designated PowerJob-worker nodes. Blank value indicates that there is
     * no limit. Non-blank value means to run the corresponding machine(s) only.
     * example: 192.168.1.1:27777,192.168.1.2:27777
     */
    private String designatedWorkers;
    /**
     * Max count of PowerJob-worker nodes.
     */
    private Integer maxWorkerCount = 0;

    //......
}    

SaveJobInfoRequest定义了designatedWorkers，用于指定woker节点的地址

JobInfoDO

powerjob-server/powerjob-server-persistence/src/main/java/tech/powerjob/server/persistence/remote/model/JobInfoDO.java

@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@Table(indexes = {
        @Index(name = "idx01_job_info", columnList = "appId,status,timeExpressionType,nextTriggerTime"),
})
public class JobInfoDO {


    @Id
    @GeneratedValue(strategy = GenerationType.AUTO, generator = "native")
    @GenericGenerator(name = "native", strategy = "native")
    private Long id;

    //......

    /**
     * 指定机器运行，空代表不限，非空则只会使用其中的机器运行（多值逗号分割）
     */
    private String designatedWorkers;
    /**
     * 最大机器数量
     */
    private Integer maxWorkerCount;

    //......

}    

JobInfoDO定义了designatedWorkers，用于指定运行的机器地址

DesignatedWorkerFilter

powerjob-server/powerjob-server-remote/src/main/java/tech/powerjob/server/remote/worker/filter/DesignatedWorkerFilter.java

@Slf4j
@Component
public class DesignatedWorkerFilter implements WorkerFilter {

    @Override
    public boolean filter(WorkerInfo workerInfo, JobInfoDO jobInfo) {

        String designatedWorkers = jobInfo.getDesignatedWorkers();

        // no worker is specified, no filter of any
        if (StringUtils.isEmpty(designatedWorkers)) {
            return false;
        }

        Set<String> designatedWorkersSet = Sets.newHashSet(SJ.COMMA_SPLITTER.splitToList(designatedWorkers));

        for (String tagOrAddress : designatedWorkersSet) {
            if (tagOrAddress.equals(workerInfo.getTag()) || tagOrAddress.equals(workerInfo.getAddress())) {
                return false;
            }
        }

        return true;
    }

}

DesignatedWorkerFilter会根据jobInfo.getDesignatedWorkers()来进行过滤，在指定机器列表内的返回false，否则返回true

getSuitableWorkers

powerjob-server/powerjob-server-remote/src/main/java/tech/powerjob/server/remote/worker/WorkerClusterQueryService.java

    public List<WorkerInfo> getSuitableWorkers(JobInfoDO jobInfo) {

        List<WorkerInfo> workers = Lists.newLinkedList(getWorkerInfosByAppId(jobInfo.getAppId()).values());

        workers.removeIf(workerInfo -> filterWorker(workerInfo, jobInfo));

        DispatchStrategy dispatchStrategy = DispatchStrategy.of(jobInfo.getDispatchStrategy());
        switch (dispatchStrategy) {
            case RANDOM:
                Collections.shuffle(workers);
                break;
            case HEALTH_FIRST:
                workers.sort((o1, o2) -> o2.getSystemMetrics().calculateScore() - o1.getSystemMetrics().calculateScore());
                break;
            default:
                // do nothing
        }

        // 限定集群大小（0代表不限制）
        if (!workers.isEmpty() && jobInfo.getMaxWorkerCount() > 0 && workers.size() > jobInfo.getMaxWorkerCount()) {
            workers = workers.subList(0, jobInfo.getMaxWorkerCount());
        }
        return workers;
    }

WorkerClusterQueryService的getSuitableWorkers会为该job选出合适的worker，它会将filterWorker返回true的机器给删除掉

小结

powerjob的执行机器地址(designatedWorkers)用于指定该job运行的worker机器列表，DesignatedWorkerFilter会根据jobInfo.getDesignatedWorkers()来进行过滤，在指定机器列表内的返回false，否则返回true，WorkerClusterQueryService的getSuitableWorkers会为该job选出合适的worker，它会将filterWorker返回true的机器给删除掉。