Full Access Salesforce MuleSoft-Integration-Architect-I Tutorials

When processing files synchronously from an FTPS server to a back-end database using VM intermediary queues for load balancing VM events on CloudHub, reliability is critical. CloudHub persistent queues should be used for FTPS file processing to ensure that no data is lost in case of worker failure or restarts. These queues provide durability and reliability since they store messages persistently.

For the batch job scope, it is not necessary to configure additional VM queues. By default, batch jobs on CloudHub use the worker's disk for VM queueing, which is reliable for handling medium-rate records processing from a source to a target system. This approach ensures that both FTPS file processing and batch job processing meet reliability requirements without additional configuration for batch job scope.

References

• MuleSoft Documentation on CloudHub and VM Queues
• Anypoint Platform Best Practices

To migrate Mule applications from CloudHub to Runtime Fabric (RTF) while maintaining the same deployment strategy using CI/CD, follow these steps:

• POM.xml Modification: Update the POM.xml file of each Mule application to include runtimeFabric deployment configurations. This ensures that the applications are packaged and prepared correctly for deployment to RTF.
• CI/CD Script Adjustments: Modify the existing CI/CD scripts to accommodate RTF-specific deployment commands and configurations. This includes updating the deployment targets and parameters to match the RTF environment.
• Deployment Strategy: Ensure that the CI/CD pipeline remains consistent with the organization’s existing strategy, but with the necessary changes to support RTF. This might involve using Anypoint CLI or API to interact with RTF.

By updating the POM.xml and CI/CD scripts, you can ensure a smooth transition from CloudHub to RTF while retaining the automated deployment process.

References:

• MuleSoft Runtime Fabric
• Mule Maven Plugin

• Requirement Analysis: The organization wants to standardize dependencies across all new and ongoing MuleSoft projects to minimize the impact of frequent plugin version upgrades and external plugin project dependencies.
• Solution: Creating a parent POM (Project Object Model) file with all required dependencies and referencing it in each application's POM.xml file is the best practice.
• Implementation Steps:

pom 1.0.0 pom org.mule.runtime mule-core-extensions-maven-plugin 1.0.0

• uk.co.certification.simulator.questionpool.PList@1dcc7b90

4.0.0 com.example parent-pom 1.0.0 child-application 1.0.0

• uk.co.certification.simulator.questionpool.PList@1dcc7c50
• Advantages:

References

• MuleSoft Documentation on Managing dependencies with Maven
• Apache Maven Documentation on POM Reference

Explanation

● Option A says "Perform EACH DB insert in a SEPARATE DB transaction". In this case if first DB insert is successful and second one fails then first insert won't be rolled back causing inconsistency. This option is ruled out.

● Option D says Perform BOTH DB inserts in ONE DB transaction.

Rule of thumb is when one or more DB connections are required we must use XA transaction as local transactions support only one resource. So this option is also ruled out.

● Option B acknowledges the before DB processing, so message is removed from the queue. In case of system failure at later point, message can't be retrieved.

● Option C is Valid: Though it says "do not ack JMS message", message will be auto acknowledged at the end of transaction. Here is how we can ensure all components are part of XA transaction: https://docs.mulesoft.com/jms-connector/1.7/jms-transactions

Additional Information about transactions:

● XA Transactions - You can use an XA transaction to group together a series of operations from multiple transactional resources, such as JMS, VM or JDBC resources, into a single, very reliable, global transaction.

● The XA (eXtended Architecture) standard is an X/Open group standard which specifies the interface between a global transaction manager and local transactional resource managers.

The XA protocol defines a 2-phase commit protocol which can be used to more reliably coordinate and sequence a series of "all or nothing" operations across multiple servers, even servers of different types

● Use JMS ack if

– Acknowledgment should occur eventually, perhaps asynchronously

– The performance of the message receipt is paramount

– The message processing is idempotent

– For the choreography portion of the SAGA pattern

● Use JMS transactions

– For all other times in the integration you want to perform an atomic unit of work

– When the unit of work comprises more than the receipt of a single message

– To simply and unify the programming model (begin/commit/rollback)