I am trying to understand how Cron expressions are written and interpreted in Java. I am unable to understand how the two expressions listed below differ in physical sense: Expression 1: * * * 1/1 * ? * Expression 2: * * * * * ? * I referred to the description provided by CronExpressionGenerator and their des…
Tag: cron
How can I change di job CRON expression in order to run my Spring Batch job twice a week?
in a Spring Batch application on which I am working on I scheduled a job in this way: This works fine and my job is runned every Sunday (day 7) at 01:30 of the night. Ok it is fine but now my client ask me to run it twice in a week (same time but in two different days). Is
Updating CroneSchedule & Job Dynamically without stopping server
I need help in externalizing the below cron schedule or executing it dynamically. For example, in the below code it is hardcoded to perform every Saturday: cronSchedule(“0 0 12 ? * SAT”). I want the value inside the cronSchedule() to externalize so that even after the server is started, I can stil…
Some doubts about this Spring Batch @Scheduled() annotation and how to manually start a Spring Batch job?
I am pretty new in Spring Batch and I have the following doubts about how to schedule the job start at a specific time. Into my project I have this SpringBatchExampleJobLauncher class: As you can see it contains the runSpringBatchExampleJob() method running the job at a specific time set by the cron expressio…
Alfresco cron syntax: difference between 0/2 and */2?
Alfresco has a cron-like system that allows you to run a job at regular intervals. The documentation specifies as an example the expression 0 0/2 * * * ? which will make the job run every 2 minutes. However, in a lot of code I see people using the expression 0 */2 * * * ? instead, the difference being
How to validate CronSequenceGenerator cron expressions?
How could I validate cron expressions that are prepared for use of CronSequenceGenerator? I mean, I cannot wait until the cron executes automatically as I’m defining like monthly intervals. Is the following correct? How can I be sure? Answer The Spring’s CronSequenceGenerator class has a method is…
How do I execute a method at a particular time in java?
Is there any way to write a program in java, so that its main method schedule (or at a 10-15 min interval) another method to executes it at a particular interval? Answer I think you are looking for the Time class. See Timer Class API You can use this class like: You want to perform a Method every 600 miliseco…