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Saikishore Reddy AengareddySaikishore Reddy Aengareddy 

Batch Apex Job Every 30 minutes

Hello all,

 

Can you please let me know the steps to make sure that I run the batch apex every 30 minutes all day and everyday...In the UI i can schedule everyday but here i want to execute my batch class everyday and on each and every single day i have to run this Batch Apex every 30 minutes?Please let me know the sequence of actions that i need to take...

 

Here is my schedulable class

 

 

global class ProcessAccs implements Schedulable{
   
    global void execute(SchedulableContext sc) {
        //  Instantiate batch class 
        BatchProcessAccs B = new BatchProcessAccs();
        database.executebatch(B,200);
    }
    
}
Best Answer chosen by Admin (Salesforce Developers) 
bob_buzzardbob_buzzard

You can use the System.schedule method, which takes a cron string to represent the repeating time.

 

I think the following should do it - you'll need to execute this from the system log or anonymous apex section of the IDE:

 

 

ProcessAccs pa= new ProcessAccs();
String cronStr = '0 0,30 * * * *';
System.schedule('Process Accs Job', cronStr, pa);

 Also, I'm not sure what level of granularity Salesforce allows - I seem to recall reading that you couldn't schedule jobs to run every minute, but I can't remember what the minimum was.

 

All Answers

bob_buzzardbob_buzzard

You can use the System.schedule method, which takes a cron string to represent the repeating time.

 

I think the following should do it - you'll need to execute this from the system log or anonymous apex section of the IDE:

 

 

ProcessAccs pa= new ProcessAccs();
String cronStr = '0 0,30 * * * *';
System.schedule('Process Accs Job', cronStr, pa);

 Also, I'm not sure what level of granularity Salesforce allows - I seem to recall reading that you couldn't schedule jobs to run every minute, but I can't remember what the minimum was.

 

This was selected as the best answer
Cory CowgillCory Cowgill

You can use the System.schedule method to accomplish this.

 

Instead of using UI for Scheduled Apex, execute these two lines in the System Log to schedule your job every 30 mins:

 

System.schedule('Process Accounts at Half Hours','0 0 * 30 * ?n',new ProcessAccts());

System.schedule('Process Accounts at On the Hour','0 0 * 0 * ?n',new ProcessAccts());

 

This will schedule two jobs which should always execute on the hour and one on the half hour I believe.

Ritesh AswaneyRitesh Aswaney

I could be wrong here, but I thought it was limited to once per hour ? Especially as when you try to do this via the UI (Schedule Apex), it only lets you choose hourly slots.

 

If that is the case then you might have to schedule your job for executing hourly, and then add some logic that counts down the rest of the time, before it re-trigger at the half hourly mark.


Alternatively, an external time trigger such as an OS scheduler, which could update something every 30 mins, which fires a trigger, which executes your job.

 

Of course, if Salesforce permits 30 min granularity, then ignore this post ! :)

Cory CowgillCory Cowgill

Ha... I see Bob Buzzard posted same thing I was posting. Sorry for duplicating. :)

 

I have a blogpost about sheduling batch apex from the finish methods that might help you out also.

 

http://corycowgill.blogspot.com/2010/12/leveraging-scheduled-apex-to-link-batch.html

Saikishore Reddy AengareddySaikishore Reddy Aengareddy

Thank you all for the insights. Here i would like to execute programatically not through the System log or in the anonymous section.Can i do that? I could not find anything... Is there a way to fit in System.schedule method in the Scheduler class?If yes can you help me with some sample code? If no What would be my next options?

 

 

Thanks.

 

 

bob_buzzardbob_buzzard

The system log and anonymous section is sheduling programmatically.  Once you have executed the code, the job will execute every 30 minutes forever.

 

Another way you might want to look at is scheduling the next run as the final action of your scheduled class.  

symantecAPsymantecAP

HI BOB

 

I have written the following code and i have scheduled thru corn job u mentioned in ur previous post.

Two things i want to discuss

 

1. My code is processing only 1 record at a time. ( my code shuld be updating the parent object based on change of child record)

 

2. When i try to paste my total code in execute anonymous system log

i get error as  line 1, column 14: Global type must be contained inside of a global class

global class updateOpportunityStage implements Database.Batchable<sObject>,Schedulable{
global string query ;

global updateOpportunityStage(){

Query = 'Select Id,BigMachines__Status__c  from BigMachines__Quote__c' ;

}

global database.querylocator start(Database.BatchableContext BC){
return Database.getQueryLocator(query);    
}
    global void execute(SchedulableContext SC){
        updateOpportunityStage stg = new updateOpportunityStage();
        String cronStr = '0 0,30 * * * *';
        System.schedule('Process Quotes', cronStr, stg);
        database.executebatch(stg);
        
    }

global void execute(Database.BatchableContext BC, List<sObject> scope){

     
        Set<id> liOppIds = new Set<id>();
//List <Opportunity> oppList = new List<Opportunity>() ;
for(sObject s : scope){

BigMachines__Quote__c quote = (BigMachines__Quote__c)s;
// System.debug('Adil'+quote);
if(quote.BigMachines__Status__c == 'unison' && quote.BigMachines__Is_Primary__c == true)
liOppIds.add(quote.BigMachines__Opportunity__c);

}


//query all the opportunities in a single query
List<Opportunity> opp = new List<Opportunity>();
opp = [select id, StageName from Opportunity where id in :liOppIds and stagename != 'Closed Won'];
for ( Opportunity opps : opp)
{
opps.StageName = 'Closed Won' ; 
}
//update all opportunities in a single DML
if(opp.size() > 0)
update opp;
 
    }
  global void finish(Database.BatchableContext BC){}  

}

 Thanks

 

Adil

bob_buzzardbob_buzzard

You won't be able to paste a class in to the system log, just the code that sets up the first execution.

 

I'm not sure what you mean in regard to one record at a time - is that because you have restricted the scope?

TejTej

I am trying schedule a web service every hour but am getting "support for specifying both a day-of-week and a day-of-month parameter" exception when am trying to do it thru system log.

global class GPCallOutJobsSchedule implements Schedulable { 
	
	public static String CRON_EXP = '0 0 0 3 9 ? 2022';  
    
    global void execute(SchedulableContext ctx) {
    	
	GPCallOutJobs j = new GPCallOutJobs();
        j.getJobs();
        
    }

}

 

GPCallOutJobsSchedule gp = new GPCallOutJobsSchedule();
String cronStr = '0 0,59 * * * *';
System.schedule('Job schedule', cronStr, gp);

  Attached is my code, Please help**

bob_buzzardbob_buzzard

The problem here is as shown in the error message.  You can't specify both the day of week and day of month.  One of those needs to be set to a '?' value.  

 

Thus your cron string needs to be either:

 

String cronStr = '0 0,59 * * * ?';

 or

 

String cronStr = '0 0,59 * ? * *';

 

 

TejTej

Thank you Bob, that worked like a charm.

SForceBeWithYouSForceBeWithYou

As you can see in the doucmentation for Apex Scheduler (http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_scheduler.htm) no special characters are allowed for seconds or minutes values, meaning you can only specify one value.... meaning you can schedule jobs with a single cron expression for only once an hour max.

 

It would take two scheduled jobs to run things every half hour.

 

String onTheHour = '0 0 * * * ?';

String onTheHalfHour = '0 30 * * * ?';

System.schedule('MyJobName', onTheHour, new MySchedulableClass() );

System.schedule('MyJobName', onTheHalfHour, new MySchedulableClass() );

 

Hope that helps....

 

Nathan Pepper

youtube.com/MayTheSForceBWithYou

SharathChandraSharathChandra

Hi Bob,

 

But how can we do this in production i dont have access to production.

Is there any other way to do this.? I want to schedule the apex for every 30 mins

SharathChandraSharathChandra

Hi Bob,

If i use the cron expression provided by you i'm getting below error.

 

System.StringException: Support for specifying both a day-of-week AND a day-of-month parameter is not implemented.

 

I also tried String cronStr = '0 30 * * * ?';

this is scheduling to 1 hour insted of 30 mins can you please help me as soon as possible

bob_buzzardbob_buzzard

That schedules a job to run at 30 minutes past the hour.  You'd need to set another one up that runs at 0 minutes past the hour.

SharathChandraSharathChandra
But String cronStr = '0 0,30 * * * ?' ; is giving the error which i mentioned in the post.
System.StringException: Support for specifying both a day-of-week AND a day-of-month parameter is not implemented.

Thanks for your reply.
SForceBeWithYouSForceBeWithYou
Scheduled jobs in Salesforce can be scheduled at most once every hour. You need two scheduled jobs offset by a half hour to achieve what you want to do.
bob_buzzardbob_buzzard

That's probably because, as mentioned above, the minutes doesn't support special characters so 0,59 won't work.  That's why SFDC specifies minimum of one hour apart, as you can only specify a single value.

 

vanathi vvanathi v
So Finaly Whats the solution to avoid this error??... am using '0 15 0-23 * * ?' it is scheduling for every hour 15th minute like 4.15,5.15 so what can be the solution for this?...
Beerappa KBeerappa K

Hi All, I want to create batch job to run on a daily (or 2 times per day basis). Batch job should look for all tasks and events *created *since the last run of the batch job - and set the Sales Related flag to "unchecked" for tasks and events which are not associated to any records (aka - no whoid and no whatid).

how to do this  ???
Jay Parikh 36Jay Parikh 36
try this one :::
string str  = system.now.addminutes(30).format ('ss mm HH dd MM ?  yyyy');
system.schedule('class name',str, new classname());