Post on 06-May-2015
Tom FullerCoherent Logic Limited
Introduction to theGrails Infinispan Plugin
Overview
• A story• Design principles• Code examples• Conclusion
Why all the stress?
ApplicationServer
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Traffic spike = trouble
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(CC) griffithchris
(CC) Mr. Gunn
Refactor here, optimise there…
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Again – a traffic spike = trouble
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(CC) amboo who?
(CC) Stephi 2006
Just buy bigger servers
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Traffic spike = trouble
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(CC) fireflythegreat
(CC) Ray_from_LA
Replicate here, replicate there…
ApplicationServer
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ApplicationServer
No surprise – a traffic spike =trouble
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(CC) Tweek
Where we’re at:
• Optimisation alone won’t solve thisproblem.
• Neither will larger servers.• Scaling the application server and
databases doesn’t work.
(CC) Mattastic!
A solution that works!
ApplicationServer
ApplicationServer
Cache
Cache
Cache
Cache
Cache
Cache
Cache
Cache
Infinispan
• Based in part on code from JBoss Cache• Licensed under the LGPL• Is a distributed in-memory data grid• Has competition• As of May 2011 Infinispan is officially
supported by Red Hat.
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Traffic spike = not a problem!
Just grow the grid!
* NOTE: Caveat with session clustering.
ApplicationServer
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Design Principles of the GrailsInfinispan Plugin
(CC) El Bibliomata
We aim to help developers:
Work with Grails and Groovy naturally.
We aim to help developers:
Work with Grails and Groovy naturally.Avoid and diagnose problems quickly.
We aim to help developers:
Work with Grails and Groovy naturally.Avoid and diagnose problems quickly.Save time.
Configuring Infinispan in Grailsdevelopment {
infinispan = {register {
cacheManager {named "matrixCacheManager"
configured {externally {
using "grails-app/conf/infinispan/infinispan-config.xml"}
}caches "agentCache", “citiesCache"
}queryHelper {
named "agentQueryHelper"referencing "agentCache"properties queryHelperPropertiesclasses infinispantestapp.Agent, infinispantestapp.SuperHero
}}
}}
}
Configuring Infinispan in Grailsproduction {
infinispan = {register {
cacheManager {named "matrixCacheManager"configured {
declaratively {using globalConfigurationusing configuration
}}caches "agentCache", "illinoisCitiesCache"
}queryHelper {
named "agentQueryHelper"referencing "agentCache"properties queryHelperPropertiesclasses infinispantestapp.Agent, infinispantestapp.SuperHero
}}
}}
}
Use the cacheLoadAgentCacheController {
def agentCachedef index = {
for (int ctr in 1..1000) {agentCache.put (
"person id $ctr",new Agent (name:"Agent Smith",weapon:"gun")
)}
}}
Execute a transactional operation
cache.transactionally {cache.put(someKey, someValue);cache.remove(someOtherKey);
}
Query and iterate over the results
def term = new Term (WEAPON, GUN)def termQuery = new TermQuery (term)
def results = agentCache.query (queryHelper,Agent, termQuery)
results.each {log.info ("it: $it")
}
Add closures as listeners
agentCache.onCacheEntryCreated {log.info ("Cache entry created: $it")
}
Food for Thought
• Infinispan 5.0 is currently underdevelopment and will deliver fork/join andmap/reduce implementations.
• Infinispan can help reduce costs for anydata source.
• Infinispan can be very useful in the cloudand service-oriented architectures (SOA).
App lica tionServer
App lica tionServer
App lica tionServer
App lica tionServer
C u sto m erIn fo rm atio n
App lica tionServer
App lica tionServer
A n a ly tics
P ro d u ctin fo rm atio n
P aym en tp ro cess in g ,
S h ip p in g
App lica tionServer
App lica tionServer
O rd erp ro cess in g
P artn erreg istra tio n
P artn er & p ro d u ctin fo rm atio n
App lica tionServer
App lica tionServer
O rd erh isto ry O rd er
h isto ry
Conclusion
• Three attempts that failed to deliver asolution that could cope with the load.
• Design principles behind the GrailsInfinispan Plugin.
• Example code.• Further documentation is available at
http://www.grails.org/plugin/infinispan
Any questions?
Contact meEmail:
thomas.fuller@coherentlogic.com