Win a copy of Rust Web Development this week in the Other Languages forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Tim Cooke
  • Campbell Ritchie
  • Ron McLeod
  • Liutauras Vilda
  • Jeanne Boyarsky
Sheriffs:
  • Junilu Lacar
  • Rob Spoor
  • Paul Clapham
Saloon Keepers:
  • Tim Holloway
  • Tim Moores
  • Jesse Silverman
  • Stephan van Hulst
  • Carey Brown
Bartenders:
  • Al Hobbs
  • Piet Souris
  • Frits Walraven

How to schedule multiple Java jobs to concurrently manipulate the same set of Cassandra data?

 
Ranch Hand
Posts: 39
1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I need to implement a scheduler for running a periodic job. There is a table in a Cassandra database in which one column contains the creation time-stamps of rows and another column contains the status which is "open" by default. I need to create a job which should run periodically in every 10 minutes and query Cassandra to find out whether any rows with the "open" status are 5 or more days older. If so, the job should then change the status of all such rows from "open" to "closed". That's it.

The above seemingly simple problem is part of a large industry-strength OSGi application and I have been asked to pick the best 3pp option among:

1. Apache Quartz
2. Apache Sling
3. Apache Zookeeper


My challenges are:

1. There will be multiple instances of the application (and, therefore, multiple instances of that periodic job) running on multiple JVM's in the live environment interacting with the same Cassandra database with thousands of rows. [Do I need to handle concurrency from my Java code?]
2. I know Quartz does not guarantee persistence but do I really need it in my case?
3. Which of the 3pp solutions (Quartz, Sling, Zookeeper) can I use?
 
I guess everyone has an angle. Fine, what do you want? Just know that you cannot have this tiny ad:
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
https://coderanch.com/wiki/718759/books/Building-World-Backyard-Paul-Wheaton
reply
    Bookmark Topic Watch Topic
  • New Topic