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Introducing Apache Jackrabbit OAK
JackRabbit OAK is a new hierarchical content repository that is distributed, loosely coupled, and multiplatform. It is JCR compliant but does not fully cover the specification. OAK uses a node store architecture with immutable content revisions stored as node states. It has a microkernel that implements the node state model with a JSON API and supports both document and segment flavors for standalone or clustered deployments respectively.
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Introducing Apache Jackrabbit OAK
- 1. JackRabbit OAK Yash Mody,PhD CTO | Tekno Point Consulting www.teknopoint.us
- 2. Introducing the “oak” HierarchicalContent repository New age CMS – distributed, loosely couples, multiplatform solution JCR Compliant (not full coverage) Scalable (>100 M nodes) Cloud Deployments www.teknopoint.us
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- 4. Overview OAK JCR OAK CORE OAK PLUGINS www.teknopoint.us
- 5. Layers Light wt HTTP protocolfor JSON www.teknopoint.us
- 6. The Node storearchitecture www.teknopoint.us
- 7. fundamentals Hierarchical/Tree Model withnodes and properties Everything else is plugin based Tree is immutable, changes are new revisions Multi Version Concurrency Control (MVCC) model Snapshot Isolation Relaxed first committer wins strategy Write Skew (ex: joint accounts) www.teknopoint.us
- 8. Node state Model Node– unordered collection Content revisions will change states of Nodes Node State is an immutable snapshot of a specific state NodeState and NodeBuilder Interfaces www.teknopoint.us
- 9. Node store Implementation ofNode State Model Java API for NSM functionality www.teknopoint.us
- 10. Microkernel NSM implementation withString only JSON API Remoteable Stateless 2 flavors of MK: Document and Segment Document – Max performance in stand alone systems Segment – Max Scalability for cluster www.teknopoint.us
- 11. Other stuff Compare NodeState CommitHooks – controls/modifies what to do with a commit Commit Editors – parallel processing of multiple hooks Commit Validators – only validates. Cannot modify www.teknopoint.us
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