Presented @ Adobe, Bangalore - Introduction to the Node State Model in Jackrabbit OAK

1. JackRabbit OAK
Yash Mody, PhD
CTO | Tekno Point Consulting
www.teknopoint.us

2. Introducing the “oak”
Hierarchical Content repository
New age CMS – distributed, loosely couples,
multiplatform solution
JCR Compliant (not full coverage)
Scalable (>100 M nodes)
Cloud Deployments
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3. Architecture
.NodeStore
.MicroKernel (MK)
.NodeState
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4. Overview
OAK
JCR
OAK
CORE
OAK
PLUGINS
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5. Layers
Light wt HTTP
protocol for JSON
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6. The Node store architecture
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7. fundamentals
Hierarchical/Tree Model with nodes 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)
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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
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9. Node store
Implementation of Node State Model
Java API for NSM functionality
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10. Microkernel
NSM implementation with String only JSON API
Remoteable
Stateless
2 flavors of MK: Document and Segment
Document – Max performance in stand alone systems
Segment – Max Scalability for cluster
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11. Other stuff
Compare NodeState
Commit Hooks – controls/modifies what to do with a
commit
Commit Editors – parallel processing of multiple hooks
Commit Validators – only validates. Cannot modify
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12. Thanks
@yash_mody
http://www.linkedin.com/in/modyyash
www.teknopoint.us