DispatchTaskHandler.java

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// to you under the Apache License, Version 2.0 (the
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//   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.doris.job.executor;

import org.apache.doris.job.base.AbstractJob;
import org.apache.doris.job.common.JobStatus;
import org.apache.doris.job.common.JobType;
import org.apache.doris.job.common.TaskType;
import org.apache.doris.job.disruptor.TimerJobEvent;
import org.apache.doris.job.task.AbstractTask;

import com.lmax.disruptor.WorkHandler;
import lombok.extern.log4j.Log4j2;
import org.apache.commons.collections.CollectionUtils;

import java.util.List;
import java.util.Map;

/**
 * dispatch timer job to task disruptor
 * when job is ready for scheduling and job status is running
 * we will create task and publish to task disruptor @see DefaultTaskExecutorHandler
 */
@Log4j2
public class DispatchTaskHandler<T extends AbstractJob> implements WorkHandler<TimerJobEvent<T>> {

    private final Map<JobType, TaskProcessor> disruptorMap;

    public DispatchTaskHandler(Map<JobType, TaskProcessor> disruptorMap) {
        this.disruptorMap = disruptorMap;
    }


    @Override
    public void onEvent(TimerJobEvent<T> event) {
        try {
            log.info("dispatch timer job, job id is {}, job name is {}", event.getJob().getJobId(),
                    event.getJob().getJobName());
            if (null == event.getJob()) {
                log.info("job is null,may be job is deleted, ignore");
                return;
            }
            if (event.getJob().isReadyForScheduling(null) && event.getJob().getJobStatus() == JobStatus.RUNNING) {
                List<? extends AbstractTask> tasks = event.getJob().commonCreateTasks(TaskType.SCHEDULED, null);
                if (CollectionUtils.isEmpty(tasks)) {
                    log.warn("job is ready for scheduling, but create task is empty, skip scheduler,"
                                    + "job id is {}," + " job name is {}", event.getJob().getJobId(),
                            event.getJob().getJobName());
                    return;
                }
                JobType jobType = event.getJob().getJobType();
                for (AbstractTask task : tasks) {
                    if (!disruptorMap.get(jobType).addTask(task)) {
                        task.cancel(true);
                        continue;
                    }
                    log.info("dispatch timer job success, job id is {},  task id is {}",
                            event.getJob().getJobId(), task.getTaskId());
                }
            }
        } catch (Exception e) {
            log.warn("dispatch timer job error, task id is {}", event.getJob().getJobId(), e);
        }
    }
}