November 2009 - infinispan-dev - Jboss List Archives

Configuration visitor - Re: [JBoss JIRA] Commented: (ISPN-145) No transport and singleton store enabled should not be allowed

by Vladimir Blagojevic

Hi, Galder and I talked about this offline. Time to involve you guys! I just completed visitor pattern for our configuration objects. Visitor is passed from root of configuration - InfinispanConfiguration object. InfinispanConfiguration class has a new method: public void accept(ConfigurationBeanVisitor v) How do we want to integrate this visitor into existing structure? 1) We add a new factory method to InfinispanConfiguration with additional ConfigurationBeanVisitor parameter 2) We leave everything as is and if there is a need to pass some visitor we pass it to InfinispanConfiguration instance directly (from DefaultCacheManager) DefaultCacheManager will pass ValidationVisitor to InfinispanConfiguration that will verify configuration semantically. Regards, Vladimir On 09-09-09 10:19 AM, Galder Zamarreno wrote: > Good idea :) > > On 09/09/2009 04:13 PM, Vladimir Blagojevic wrote: >> Yeah, >> >> I was thinking that we can make a visitor for configuration tree and >> then you can do verification of any node and other things as well. Use >> cases will come up in the future for sure. >> >> Cheers >> >> >> >> On 09-09-09 3:29 AM, Galder Zamarreno (JIRA) wrote: >>> [ >>> https://jira.jboss.org/jira/browse/ISPN-145?page=com.atlassian.jira.plugi... >>> >>> ] >>> >>> Galder Zamarreno commented on ISPN-145: >>> --------------------------------------- >>> >>> Not sure I understand what you mean by generic though. You mean any >>> component to have a validation step of some sort? >>> >>> Thanks for taking this on :) >>> >>>> No transport and singleton store enabled should not be allowed >>>> -------------------------------------------------------------- >>>> >>>> Key: ISPN-145 >>>> URL: https://jira.jboss.org/jira/browse/ISPN-145 >>>> Project: Infinispan >>>> Issue Type: Bug >>>> Components: Loaders and Stores >>>> Affects Versions: 4.0.0.ALPHA6 >>>> Reporter: Galder Zamarreno >>>> Assignee: Vladimir Blagojevic >>>> Priority: Minor >>>> Fix For: 4.0.0.CR1 >>>> >>>> >>>> Throw configuration exception if singleton store configured without >>>> transport having been configured. >>>> It makes no sense to have singleton store enabled when there's no >>>> transport. >> >

12 years, 6 months

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Using Coverity scan?

by Sanne Grinovero

Hello, Did you consider enabling Infinispan to be monitored by coverity's code analysis services? They are free for OSS projects, I saw a demo recently and was quite amazed. It's similar to FindBugs, but not only about static code checks. They checkout your code from trunk and then run several analysis on it periodically, one of them is about dynamic thread behavior to predict deadlocks or missing fences instrumenting the code, and produce nice public reports; AFAIK you don't need to setup anything yourself, besides getting in touch to ask for it. It's only available for C and Java code, and they have an impressive list of OSS projects in the C world (linux kernel, httpd server, samba, gnome, GCC, PostgreSQL, ...) but not much on Java. http://scan.coverity.com/ No, I'm not affiliated :-) Just thinking that it might be useful to have if it's not too hard to setup. Cheers, Sanne

13 years, 4 months

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ISPN-29 and a "custom protocol"

by Manik Surtani

Regarding ISPN-29 [1], I've made some notes about what this will provide on this wiki page [2]. I'm kinda tired of referring to the 'custom binary protocol' as a 'custom binary protocol'! Can anyone think of a snazzy name for this protocol? Keep in mind that we would want others to implement clients using this protocol as well on other platforms. Here are a few thoughts to get the creative juices flowing: * ICBP (Infinispan cache binary protocol - BORING!) * Adhesive (the 'glue' between the client and server) * Elastiglue * StickyFingers (after the Rolling Stones album?) - Manik [1] https://jira.jboss.org/jira/browse/ISPN-29 [2] http://www.jboss.org/community/wiki/Clientandservermodules -- Manik Surtani manik(a)jboss.org Lead, Infinispan Lead, JBoss Cache http://www.infinispan.org http://www.jbosscache.org

14 years, 4 months

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Preparing for Infinispan 4.0.0.CR3

by Manik Surtani

I was hoping to do a GA soon but I think we should cut at least 1 more CR first. There are some critical issues I want to fix for this, namely: ISPN-277 (Me) ISPN-249 (Me) ISPN-280 (Sanne) ISPN-288 (Navin) Nice to have: ISPN-281 (Mic Neale) ISPN-276 (Sanne) ISPN-283 (Me) ISPN-287 (Navin) How do people feel about finishing their respective JIRAs by close of play tomorrow (Wed) for a Thu morning release? Cheers -- Manik Surtani manik(a)jboss.org Lead, Infinispan Lead, JBoss Cache http://www.infinispan.org http://www.jbosscache.org

14 years, 4 months

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Infinispan and Google app engine

by Vladimir Blagojevic

Hi all, Manik asked me to investigate what it would take to deploy Infinispan inside google app engine (GAE). As you might have heard GAE execution environment is somewhat constricted (can not create threads, write to files, open sockets, etc). Right from a get go it was clear that we can not run Infinispan in any mode other than local. However, even if Infinispan is run in local mode GAE users could benefit from Infinispan's JSR-107 cache interface that is backed up with cache store implemented using google datastore api. There probably are use case scenarios where GAE users interact with both google provided JSR-107 memcache service [1] and datastore [2] separately where in fact Infinispan's JSR-107 interface that is automatically synced with datastore would make much more sense. Manik and I went back and forth and decided to put this sub project on a back burner at this moment. Even though we could accommodate GAE's thread restriction it turns out that GAE sandbox restrictions involve several apis that we use (JAXB, JMX, JNDI among others) and retrofitting Infinispan into this tight sandbox would be a headache. There is a strong comunity push to unrestrict these API and it seems pressures from community would eventually be successful. Also, I am still awaiting for some feedback from Mircea to see if we can even implement google datastore cache loader to be transactional. Even though GAE datastore supports transactions they are only available in the same entity group [3]. As far as I understand GAE datastore they implement horizontal partitioning which basically involves putting different rows into different tables. Think each Person row entry would have to be in different table unless they are in some owns (say parent-child) relationship. Feedback appreciated, Vladimir [1] http://code.google.com/appengine/docs/java/memcache/usingjcache.html [2] http://code.google.com/appengine/docs/java/datastore/ [3] http://www.youtube.com/watch?v=2jW2iSKDipY (between 6:45 and 11:40)

14 years, 4 months

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Exposing transient/mortality information externally

by Galder Zamarreno

Hi, Re: http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4267469#4267469 I think Brian has a good point here. We don't expose any internal information wrt each cache entry's expiry/eviction values. Brian has a good point that this could guide him in finding out which entries have been last been used, how long they've been in memory and how it could tweak expiration/eviction accordingly. If we don't do anything, I think we run the risk of people being forced to get hold of the container, looping through it and getting information that they need from inspecting internal classes. So, I'd suggest that we add a JMX method to CacheDelegate called something like: Map<String, Map<String, long>> getTransientAndMortalityInformation(). (I'm open to suggestions to other names. This is the 1st thing that came to my mind) This would return a Map where the key is the toString form of the cache key and the value part is a map where individual transient/mortal properties are returned. I.e. [Person#1:[created:123456,lifespan:120000,maxIdle:60000,lasUsed:13456], Person#2:[created:234567,lifespan:120000,maxIdle:60000,lasUsed:24567], ...] We could event add calculated properties such as 'age' which is current - created. This would vary with each call obviously. As indicated in the forum entry, at least based on this use case, I don't see an immediate need to query this type of information given a key, although could be potentially useful for other use cases. The reason this would not help much right now is because it is Hibernate that creates the keys of 2nd level cache (i.e. CacheKey) and these are nor meant to be recreated externally, so it'd be hard for external apps to get something out of the Infinispan cache directly without going through the Hibernate integration layer. My suggested JMX method could allow for individual transient/mortality information to be queried by tools, or other client jmx code. Maybe some tools could use that to create a table or something like that which could be ordered based on a column? i.e. age. Also, tools or client jmx code could convert those longs into whatever they want: seconds, minutes...etc The reason I think JMX is a good candidate here is this is inherently monitoring information and it allows us to expose internal information via primitives without having to expose internal classes. Thoughts? Cheers, -- Galder Zamarreño Sr. Software Engineer Infinispan, JBoss Cache

14 years, 4 months

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HotRod??

by Michael Lawson (mshindo)

Has dev on hotrod been started? -- Michael Lawson (mshindo) <http://www.google.com/search?q=development%20>

14 years, 5 months

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getAsync() missing?

by Sanne Grinovero

For a Lucene Directory optimization; Instead of fetching needed data just-in-time I was planning to do some prefetching: it's easy to predict just before some not-so-trivial methods which data I'm going to need next - like when scrolling on a huge byte array we have scattered into several keys - so I was planning to use a getAsync() method as soon as we feel it's likely to need that value too soon. Like putAsync() does exist I was naturally expecting getAsync() to exist too, but it appears the get methods are missing from the async APIs? What would you think of adding them? In alternative I could make use of a streaming API, but this would likely be implemented in a similar shape? Cheers, Sanne

14 years, 5 months

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Infinispan Benchmarks

by Michael Lawson (mshindo)

Hi, I have been performing some benchmark testing on Infinispan Running in Distributed mode, with some unexpected results. For an insertion with a Key size of 100 Bytes, and Value size 100 Bytes, the insertion time was 0.13ms and retrieval was 128.06ms. Communication with the infinispan nodes is being done via a socket interface, using standard java serialization. The retrieval time is consistently high in comparison to other systems, and I am wondering whether there are some other benchmark reports floating around that I can compare results with. -- Michael Lawson

14 years, 5 months

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Query order question

by Bryan Grunow

When running a local query against a FIFODataContainer I get the results back in FIFO order. Is this guaranteed? If not do you think it's possible for 4.1 when queries are officially supported? Thanks Bryan --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

14 years, 5 months

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infinispan-dev November 2009