txm119161336 commented on issue #2490:
URL:
https://github.com/apache/shardingsphere-elasticjob/issues/2490#issuecomment-4824794834
Thank you so much for your reply . I am working on a very old code base .
The complete code as below . I have made a comment in the code ." The first
time" and "the second time"
/**
* Copyright 1999-2015 dangdang.com.
* <p>
* 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.
* </p>
*/
package com.dangdang.ddframe.job.internal.job;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import com.dangdang.ddframe.job.api.ElasticJob;
import com.dangdang.ddframe.job.api.JobExecutionMultipleShardingContext;
import com.dangdang.ddframe.job.internal.config.ConfigurationService;
import com.dangdang.ddframe.job.internal.execution.ExecutionContextService;
import com.dangdang.ddframe.job.internal.execution.ExecutionService;
import com.dangdang.ddframe.job.internal.failover.FailoverService;
import com.dangdang.ddframe.job.internal.offset.OffsetService;
import com.dangdang.ddframe.job.internal.sharding.ShardingService;
/**
* 弹性化分布式作业的基类.
*
* @author zhangliang, caohao
*/
@Slf4j
public abstract class AbstractElasticJob implements ElasticJob {
@Getter(AccessLevel.PROTECTED)
private volatile boolean stoped;
@Setter
@Getter(AccessLevel.PROTECTED)
private ConfigurationService configService;
@Setter
@Getter(AccessLevel.PROTECTED)
private ShardingService shardingService;
@Setter
private ExecutionContextService executionContextService;
@Setter
private ExecutionService executionService;
@Setter
private FailoverService failoverService;
@Setter
@Getter(AccessLevel.PROTECTED)
private OffsetService offsetService;
@Override
public final void execute(final JobExecutionContext context) throws
JobExecutionException {
log.debug("Elastic job: job execute begin, job execution
context:{}.", context);
configService.checkMaxTimeDiffSecondsTolerable();
shardingService.shardingIfNecessary();
JobExecutionMultipleShardingContext shardingContext =
executionContextService.getJobExecutionShardingContext();
if
(executionService.misfireIfNecessary(shardingContext.getShardingItems())) {
log.info("Elastic job: previous job is still running, new job
will start after previous job completed. Misfired job had recorded.");
return;
}
executionService.cleanPreviousExecutionInfo();
executeJobInternal(shardingContext); // first time execution
log.debug("Elastic job: execute normal completed, sharding
context:{}.", shardingContext);
while (configService.isMisfire() &&
!executionService.getMisfiredJobItems(shardingContext.getShardingItems()).isEmpty()
&& !stoped && !shardingService.isNeedSharding()) {
log.debug("Elastic job: execute misfired job, sharding
context:{}.", shardingContext);
executionService.clearMisfire(shardingContext.getShardingItems());
executeJobInternal(shardingContext); // second time execution
log.debug("Elastic job: misfired job completed, sharding
context:{}.", shardingContext);
}
if (configService.isFailover() && !stoped) {
failoverService.failoverIfNecessary();
}
log.debug("Elastic job: execute all completed, job execution
context:{}.", context);
}
private void executeJobInternal(final
JobExecutionMultipleShardingContext shardingContext) {
if (shardingContext.getShardingItems().isEmpty()) {
log.debug("Elastic job: sharding item is empty, job execution
context:{}.", shardingContext);
return;
}
executionService.registerJobBegin(shardingContext);
executeJob(shardingContext);
executionService.registerJobCompleted(shardingContext);
if (configService.isFailover()) {
failoverService.updateFailoverComplete(shardingContext.getShardingItems());
}
}
protected abstract void executeJob(final
JobExecutionMultipleShardingContext shardingContext);
/**
* 停止运行中的作业.
*/
public void stop() {
stoped = true;
}
}
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