Hi there - all looks good. Some comments:
Summary documentation - is this going to be published on a wiki page
or something somewhere? Especially the Infinispan bit? I think
people will find this info very useful...
CacheKey - if this class is what everything is going to be used in the
cache, for performance you should cache the hashcode. Calculate it
once and then cache it as an instance variable. If this class is
immutable it can be done on construction, even. Infinispan uses
hashcode() a lot. :-) But then again, depending on how many entries
live in the cache, the overhead of an extra int for every entry may be
heavy ...
LockCacheKey - is probably more performant if this is implemented as a
boolean flag on CacheKey. Then you won't need to look at the class
type when working out hashcodes
Have you written any stress or performance tests?
Cheers
Manik
On 23 Aug 2009, at 22:53, Łukasz Moreń wrote:
Hi,
Yes, I can adjust the patch next days. I've just noticed that I send
summary in not friendly format :), better one is now attached.
There is explanation for yours questions below.
2009/8/23 Emmanuel Bernard <emmanuel(a)hibernate.org>
Hey Lukasz,
Your patch looks quite good and pass tests on my side.
I encourage others to check out the patch before we apply it
(ideally another person form HSearch and one person from infinispan.
Lukasz, I have a few questions/remarks though before applying it.
Can you answer / adjust the patch?
IndexWriterSetting
Why move to return Object in parsing from the initial int?
IndexWriterSetting has to set up MergeScheduler in IndexWriter.
Before, parsing was responsible for number conversion from String to
int. Now I have to parse class name, and build/return MergeScheduler
from it.
Move DPHelper#createInfinispanCacheManager to IDP
this is not something that can be shared as it creates a hard
dependency on infinispan otherwise.
in createInfinispanCacheManager
Don't log in error the fact that xml is not used if a default config
is used. Just log in trace at best.
Rename InfinispanCacheManagerConfigurationImpl to
DefaultInfinispanCacheManagerConfiguration or even better with a
name describing nicely the behavior of the infinispan config.
in InfinispanIndexOutput, is it possible to get writeBytes bigger
than buffer size? If yes, does newCheck creates the appropriate
numbers of chunks?
Yes it is possible. Writing process is divided into stages, during
every stage can be written max: buffer_size bytes. At the end of the
stage its checked if necessary is new chunk, if so new chunk is
created.
InfinispanDirectoryProvider
put the configuration proeprties available in the
InfinispanDirectoryProvider javadoc.
I think the default cache name should be "Hibernate Search" instead
of "HSInfinispanCache". We know it's in infinispan :)
what's the try catch opening and closing an IW about? It looks weird.
IW is opened with create=true parameter, first index have to be
initialized/created. Always next IW is opened with create=false
parameter, then data is appended to exisitng index. Similar things
are done in other DP's.
in stop()
you don't close the CacheManager? How is that?
Yes. Should be closed.
InfinispanCacheManagerConfigurationImpl
What does "Infinispan-Cluster" correspond to? Why this name?
Shouldn't it be "Hibernate Search cluster"?
Is it safe to override the GlobalConfiguration? What if JBoss AS use
infinispan to run?
This name is used to distinguish cluster used by HSearch - All nodes
with the same name form a group. Yes, rather "Hibernate Search
cluster" is better name. It is safe to modify GlobalConfiguration,
there can be set up configuration for CacheManager like
communication way (JGroups or something else), stack configuration
for JGroups, etc.; where Configuration is used to configure specific
cache. I think just the infinispan cluster name on JBoss AS have to
be different from HSearch, then they will be independent.
Why the use of DummyTransactionManagerLookup. Doesn't Infinispan
guess the right TM depending on the environment? e in JBoss As use
the JBoss one etc? I think GenericTransactionManagerLookup does that.
Yes right, I was testing it with DummyTM and forgot to change it
later.
InfinispanCacheManagerConfiguration
some javadoc on the methods would be useful. I don't know what do
implement here.
Is there a better name for Metadata? Like FileMetadata maybe?
Better FileMetadata or maybe FileHeader.
Where is ispn-cache-default-conf.xml used? For tests only? If not:
is it possible to use a programmatic version instead and what is
"It's a movie cache"?
Yes in tests only so far. However it can be used as a provided
default configuration. I will send maybe question to infinispan
group about best configuration parameters. "It's a movie cache" it's
the name for cache configured in ispn-cache-default-conf.xml. In
tests in this cache are stored indexes for entity Movie. Indexes for
all other entities are stored in default HSInfinispanCache.
Emmanuel
Begin forwarded message:
> From: Łukasz Moreń <lukasz.moren(a)gmail.com>
> Date: 21 août 2009 02:11:03 HAEC
> To: Emmanuel Bernard <emmanuel(a)hibernate.org>
> Subject: GSoC patch with Infinispan Directory Provider
>
> I'm sending patch and piece of documentation - not much but
> necessary information are included.
> There are some todos but I didn't manage to finish it yet.
> I changed maven jgroups dependency to 2.8.beta2, before version was
> clashed with used by infinispan.
> In pom file there was dependency on hibernate common annotations
> 3.2.shapshot. It should't be 3.5?
>
> Cheers,
> Lukasz
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Manik Surtani
manik(a)jboss.org
Lead, Infinispan
Lead, JBoss Cache
http://www.infinispan.org
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