java quartz 失败重试_java – Quartz在失败时重试

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Automatically Retry Failed Jobs in Quartz

如果你想有一个不断尝试的作业,直到成功,你所要做的就是抛出一个带有一个标志的JobExecutionException,以便在调试程序失败时再次触发它.以下代码显示如何：

class MyJob implements Job {

public MyJob() {

}

public void execute(JobExecutionContext context) throws JobExecutionException {

try{

//connect to other application etc

}

catch(Exception e){

Thread.sleep(600000); //sleep for 10 mins

JobExecutionException e2 = new JobExecutionException(e);

//fire it again

e2.setRefireImmediately(true);

throw e2;

}

}

}

如果您想重试一定次数,会变得更复杂一些.您必须使用StatefulJob并在其JobDataMap中持有一个retryCounter,如果作业失败,则它会增加.如果计数器超过最大重试次数,那么您可以根据需要禁用该作业.

class MyJob implements StatefulJob {

public MyJob() {

}

public void execute(JobExecutionContext context) throws JobExecutionException {

JobDataMap dataMap = context.getJobDetail().getJobDataMap();

int count = dataMap.getIntValue("count");

// allow 5 retries

if(count >= 5){

JobExecutionException e = new JobExecutionException("Retries exceeded");

//make sure it doesn't run again

e.setUnscheduleAllTriggers(true);

throw e;

}

try{

//connect to other application etc

//reset counter back to 0

dataMap.putAsString("count", 0);

}

catch(Exception e){

count++;

dataMap.putAsString("count", count);

JobExecutionException e2 = new JobExecutionException(e);

Thread.sleep(600000); //sleep for 10 mins

//fire it again

e2.setRefireImmediately(true);

throw e2;

}

}

}