Hi Firzahan, Performance of the cache is not the most important feature in the cache mediator though it is essential. I wanted to know if we should use kernel implementation of jcache over any other caching implementations in wso2 products. We have used guava cache in cache mediator and changing to jcache would be an architectural change.
Thank you, Riyafa On Wed, Nov 15, 2017 at 11:20 AM, Firzhan Naqash <firz...@wso2.com> wrote: > Hi Riyafa, > > I agree Guava caching implementation is much more improved than JCache. > But recently the trend has shifted towards using Caffeine [1] as it > supersedes the caching support in the Google Guava library with an actively > maintained Java 8+ version in standalone form. Event Spring framework has > shifted towards Caffeine from version 5.0 onwards [2]. > > > - Has good performance[1] > > You have pointed the URL of caffeine. In that case, > are you planning to use the Caffeine? > > [1] https://github.com/ben-manes/caffeine > > [2] https://jira.spring.io/browse/SPR-13797 > > Regards, > Firzhan > > > email: firz...@wso2.com > mobile: (+94) 77 9785674 <%28%2B94%29%2071%205247551>*| > blog: http://firzhanblogger.blogspot.com/ > <http://firzhanblogger.blogspot.com/> <http://suhothayan.blogspot.com/>* > *twitter: https://twitter.com/firzhan007 > <https://twitter.com/firzhan007> | linked-in: > **https://www.linkedin.com/in/firzhan > <https://www.linkedin.com/in/firzhan>* > > On Sun, Nov 12, 2017 at 6:09 PM, Riyafa Abdul Hameed <riy...@wso2.com> > wrote: > >> Hi, >> >> Currently we have used the guava cache for the cache mediator >> implementation. The reason for choosing guava cache over kernel >> implementation of jcache are as follows: >> >> >> - *Main reason:* The guava cache implementation allows to specify a >> maximum size which is the number of entries in the cache. >> - Simple to use--does not have a close method >> - Has good performance[1] >> - Previous implementation of cache mediator using jcache >> implementation of the cache mediator has several issues[2]. All the past >> issues with cache mediator has been resolved in the rewrite and it has >> been >> well tested. >> - We are not supporting distributed caching in the cache mediator now >> and the complicated implementation of jcache in the kernel with hazelcast >> is no more needed. >> >> Note the following: >> >> - The cache mediator has already been implemented using guava cache >> and shifting to jcache is additional work and would require more testing >> - It is possible to argue that the maxsize implementation is already >> available in the kernel implementation of jcache, but I would like to >> point >> out that this implementation does not evict messages from the cache as >> soon >> as maxSize is reached, but will wait for 30s before it checks the maxsize. >> This is not what is expected from a cache mediator and using this would >> mean that we have thread sleeps in all tests written and possible >> complaints from future users. >> - Current wso2 products already use guava cache because of the added >> benefits. One example is andes[3]. >> >> [1] https://github.com/ben-manes/caffeine/wiki/Benchmarks >> [2] https://wso2.org/jira/browse/ESBJAVA-5214 >> >> [3] https://github.com/wso2/andes/blob/9acf25bea2ec97cca38948238 >> 1c93f3e1e3688d5/pom.xml#L195-L199 >> >> Thank you, >> Riyafa >> >> >> -- >> Riyafa Abdul Hameed >> Software Engineer, WSO2 Lanka (Pvt) Ltd <http://wso2.com/> >> >> Email: riy...@wso2.com <riyafa...@cse.mrt.ac.lk> >> Website: https://riyafa.wordpress.com/ <http://riyafa.wordpress.com/> >> <http://facebook.com/riyafa.ahf> <http://lk.linkedin.com/in/riyafa> >> <http://twitter.com/Riyafa1> >> >> _______________________________________________ >> Architecture mailing list >> Architecture@wso2.org >> https://mail.wso2.org/cgi-bin/mailman/listinfo/architecture >> >> > -- Riyafa Abdul Hameed Software Engineer, WSO2 Lanka (Pvt) Ltd <http://wso2.com/> Email: riy...@wso2.com <riyafa...@cse.mrt.ac.lk> Website: https://riyafa.wordpress.com/ <http://riyafa.wordpress.com/> <http://facebook.com/riyafa.ahf> <http://lk.linkedin.com/in/riyafa> <http://twitter.com/Riyafa1>
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