DHF Upgrades and Maintenance

Data Hub Framework (DHF) is powerful—but upgrading it isn't always simple. When DHF versions change, a cascade of dependencies comes into play. Don't tackle this alone when you don't have to.

# The DHF Upgrade Challenge

Upgrading DHF impacts far more than just the framework itself. The ripple effects touch:

• Gradle versions - different versions of DHF require different versions of Gradle
• Java/JDK versions - compatibility requirements change between releases
• MarkLogic Server versions - version compatibility matrix constraints
• ml-app-deployer - configuration deployment dependencies
• ml-gradle - deployment automation tool versions
• Data Hub architecture - pre-5.x legacy flows vs. modern configuration-driven approach

# When the Gap Widens

If the gap between your current version and your target version is considerable, challenges multiply. Sometimes there's no direct upgrade path—you may need intermediate steps or workarounds that aren't documented.

# Legacy Modifications

Early DHF versions were often customized locally. Teams made modifications to core framework code to meet specific needs. These customizations can create serious obstacles during upgrades when new versions have fundamentally different architectures or APIs.

# Language Paradigm Shifts

Newer DHF versions are JavaScript-centric, while many existing implementations use XQuery extensively. Bridging this gap requires deep knowledge of both languages and how to migrate logic between them—or how to maintain XQuery functionality in newer environments.

# Flow Conversion Complexity

Migrating from legacy DHF (pre-5.x) to modern Data Hub involves converting code-driven flows to configuration-driven approaches. This isn't a simple find-and-replace operation—it requires understanding both architectures and carefully reengineering your data flows.

# Our Proven Expertise

We've been in the trenches. We know DHF inside and out, from the earliest versions through the latest releases. We've even helped bridge knowledge gaps for the vendor, solving version nuances that had no documented solutions.

We bring:

• Deep version knowledge across the entire DHF timeline
• Real-world upgrade experience with complex, customized implementations
• Language expertise in both XQuery and JavaScript
• Dependency management across the entire MarkLogic ecosystem
• Testing and validation methodologies to ensure successful transitions

# Don't Face This Challenge Alone

DHF upgrades and maintenance don't have to be painful. Let us take the complexity off your plate. We'll assess your current state, plan your upgrade path, handle the technical intricacies, and ensure your data hub continues operating smoothly.

The longer you postpone upgrades, the more complex they become. Reach out today—no matter where you are or what version challenges you're facing. Our expertise ensures you'll navigate DHF upgrades successfully while your team stays focused on delivering value to your business.

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