Creating and using a distributed lock

How to use a distributed lock to coordinate Vert.x applications in clustered mode.
The Vert.x example uses Vert.x - Infinispan cluster manager, powered by Infinispan 9.2. Infinispan 9.2 has a new ClusteredLock API to solve concurrency problems between Infinispan nodes. This presentation looks under the hood and shows on live-coding style how this new API has been created with already existing and production ready functionalities in Infinispan.

Transcript

1. Creating and using a distributed lock Snowcamp 2018 - Katia Aresti
2. @karesti
4. 4 Distributed cache (in memory datagrid) key/value Uses peer-to-peer communication No master/slave No bottleneck or SPOF Search, Streams, integration with Spark, Kafka, Hadoop, Vert.x… Embedded and Client/Server
5. 5 Clustering with Infinispan As cMa
6. 6 Clustered Vert.x application example Ran Id P od Reb o s Mon in Eve B s 2. Con f o d s ID 4. Con f o d s RE 3. Sen d es RE 1. Sen d es ID https://github.com/karesti/vertx-api/tree/snowcamp/clustered https://github.com/karesti/vertx-api/tree/snowcamp-withlock
7. Clustered Lock Non reentrant Non blocking Auto-release on Failure, Split-brain Node level Owner (!thread)
8. Clustered Lock Manager - Infinispan 9.2
9. Clustered Lock - Infinispan 9.2
10. Node N Node 1 Node 2 Node 3 ... Lock SnowCamp
11. Node N Node 1 Node 2 Node 3 ... ClusteredLockManager Clustered Lock Lock SnowCamp Address ( not a thread) RPC calls to change lock state
12. Clustered Lock - Infinispan 9.2
13. Using Infinispan API
14. Comparing with the JDK
15. Coding tryLock(), unlock() and tryLock(time, unit) ! Initial state: https://github.com/karesti/infinispan/tree/snowcamp tryLock/unlock: https://github.com/karesti/infinispan/tree/snowcamp-tryLock-Unlock tryLock with timeout: https://github.com/karesti/infinispan/tree/snowcamp-tryLockWithTimeout
16. Final thoughts and roadmap The power of distributed caches don’t stop on caching! Concurrency is not simple (at all) Creating reentrant locks too Adding ownership levels for locking (dealing concurrency in each node too) Locks for client / server mode Other structures available : Multimap, Counters ... Coming : Topics, Sorted Sets
17. Feedback please! Clustered Lock https://github.com/infinispan/infinispan/tree/master/lock Vert.x Cluster Manager https://github.com/vert-x3/vertx-infinispan
18. @karesti @infinispan