Design Patterns for Asynchronous Apex
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The document discusses design patterns for asynchronous Apex in Salesforce, highlighting challenges and solutions related to future calls, batch Apex, and scheduled Apex. It outlines the limitations of asynchronous programming and introduces new functionalities introduced in recent Salesforce releases. Additionally, it promotes a book on advanced Apex programming and mentions Full Circle CRM's marketing applications for tracking campaign performance.
Design Patterns for Asynchronous Apex
- 1. Design Patterns for Asynchronous Apex Dan Appleman, Full Circle CRM, CTO Author: Advanced Apex Programming for Salesforce.com and Force.com @danappleman
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- 3. Our goal today… Explore how recent changes in Apex support new solutions to common asynchronous “challenges”
- 4. Quick review ▪Why do we use asynchronous code? ▪The big three: Future calls, Batch Apex and Scheduled Apex ▪The Rules ▪ Future can’t call future, 10 future calls per context ▪ Batch can’t call future, only 5 at once ▪ Limited # of scheduled Apex jobs ▪ Scheduled Apex job blocks updates
- 5. What would you like to do? ▪Future calling future ▪Chaining asynchronous operations ▪More frequent and finer resolution scheduled jobs ▪Anything else?
- 6. What’s new? ▪Spring 12: New type system ▪Winter 13: Start batch in the Finish statement of a batch ▪Summer 13: Increased # of Scheduled Apex job Scheduled batch ▪Winter 14: CronJobDetail object
- 7. Challenge: Scheduled Apex blocks updates Solution: Use type system to dynamically create classes that implement delegated functionality Platform Scheduled Class Dynamic creation Delegated Class
- 8. Challenge: Perform a series of batch operations Solution: Chain batch operations Code Start Execute Execute Finish Other batch
- 9. Challenge: Future call can’t call a future call Solution: Alternate future calls with scheduled Apex Future Scheduled This design pattern is problematic: •Can burn through limits •Potential concurrency issues Future
- 10. Challenge: Create more than 10 future calls in an execution context Solution: Replace future calls with custom async request object Use scheduled Apex or scheduled batch to process requests Insert objects Scheduled Batch “Future” “Future” “Future”
- 11. For more information Advanced Apex Programming for Salesforce.com and Force.com – Second Edition • • • • • Incorporates changes through Winter 14 Designing for CPU Time limits Extended chapter on triggers Extended chapter on asynchronous patterns New chapter on concurrency patterns
- 12. All about Full Circle CRM Full Circle CRM develops native Salesforce.com applications that enable marketers to accurately track and measure marketing campaign performance directly in Salesforce ▪ Bridge the information gap between leads and contacts ▪ Obtain complete and detailed campaign performance metrics ▪ Develop advanced campaign attribution and influence analytics Booth 1324 Moscone North
- 13. Download sample code for this session at www.AdvancedApex.com/Dreamforce13