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Posted to dev@directmemory.apache.org by "Hudson (Commented) (JIRA)" <ji...@apache.org> on 2012/02/24 16:36:48 UTC
[jira] [Commented] (DIRECTMEMORY-62) Adopt fluent APIs for
bootstrapping the Cache (and optionally manage stored objects)
[ https://issues.apache.org/jira/browse/DIRECTMEMORY-62?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215679#comment-13215679 ]
Hudson commented on DIRECTMEMORY-62:
------------------------------------
Integrated in directmemory-trunk #124 (See [https://builds.apache.org/job/directmemory-trunk/124/])
[DIRECTMEMORY-62] Adopt fluent APIs for bootstrapping the Cache
added Interfaces and basic abstract implementations of configurator stuff
it will be the foundation of all configuration/boostraps (sorl, server, etc)
still in progress (Revision 1293291)
Result = SUCCESS
simonetripodi :
Files :
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/AbstractCacheConfiguration.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/CacheConfiguration.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/CacheConfigurator.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/CacheConfiguratorImpl.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/DirectMemory.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/DirectMemoryLoaderException.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/ErrorMessage.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/MemoryUnitDimensionBuilder.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/SizeBuilder.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/TimeMeasureBuilder.java
* /incubator/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/package-info.java
> Adopt fluent APIs for bootstrapping the Cache (and optionally manage stored objects)
> ------------------------------------------------------------------------------------
>
> Key: DIRECTMEMORY-62
> URL: https://issues.apache.org/jira/browse/DIRECTMEMORY-62
> Project: Apache DirectMemory
> Issue Type: New Feature
> Affects Versions: 0.6.0
> Reporter: Simone Tripodi
> Assignee: Simone Tripodi
> Fix For: 0.6.0
>
> Attachments: edsl-prototype.patch
>
>
> Hi all guys,
> as discussed some days ago, I started prototyping an EDSL embedded in DM to make Cache APIs more "sexy" :)
> So, influenced by the past experience with Commons Digester - influenced by Google Guice - I tried to identify the 2 phases in the Cache lifecycle
> * the "bootstrap" phase - where settings are used to instantiate the Cache;
> * the object store management.
> Current codebase has a mix of both and users have to be aware of correct sequence of operations call, I mean, calling {{Cache.retrieve( "aaa" )}} without having previously called {{Cache.init( 1, Ram.Mb( 100 ) )}} at the beginning of the program, would cause an error. That is why I recurred to a kind of "configuration" pattern to make sure Cache instance have to be configured first and then can be used:
> {code}
> /* Basic configuration APIs */
> Cache cache = DirectMemory.createNewInstance( new CacheConfiguration()
> {
> @Override
> public void configure( CacheConfigurator cacheConfigurator )
> {
> cacheConfigurator.numberOfBuffers().ofSize( 1 );
> cacheConfigurator.allocateMemoryOfSize( 128 ).Mb();
> cacheConfigurator.scheduleDisposalEvery( 10 ).hours();
> cacheConfigurator.bindConcurrentMap().withJVMConcurrentMap();
> cacheConfigurator.bindMemoryManagerService().withDefaultImplamentation();
> cacheConfigurator.bindSerializer().fromServiceProviderInterface();
> }
> } );
> {code}
> Hoping that the code itself is clear enough, the {{DirectMemory}} class accepts a {{CacheConfiguration}}, users have to override the {{ configure( CacheConfigurator )}} method, where describing the basic Cache behavior, and will return a Cache instance.
> According to the DRY (Don't Repeat Yourself) principle, repeating "cacheConfigurator" over and over for each binding can get a little tedious, so there is an abstract support class:
> {code}
> cache = DirectMemory.createNewInstance( new AbstractCacheConfiguration()
> {
> @Override
> protected void configure()
> {
> numberOfBuffers().ofSize( 1 );
> allocateMemoryOfSize( 128 ).Mb();
> scheduleDisposalEvery( 10 ).hours();
> bindConcurrentMap().withJVMConcurrentMap();
> bindMemoryManagerService().withDefaultImplamentation();
> bindSerializer().fromServiceProviderInterface();
> }
> } );
> {code}
> Once obtained the Cache instance, users can now start storing objects:
> {code}
> Pointer a = cache.allocatePointer( 1 ).Gb().identifiedBy( "Simo" );
> Pointer b = cache.put( "Strored!" ).identifiedBy( "Raf" ).thatNeverExpires();
> Pointer c = cache.putByteArray( new byte[0] ).identifiedBy( "Izio" ).thatExpiresIn( 1 ).days();
> Pointer d = cache.update( new Object() ).identifiedBy( "Olivier" );
> Pointer e = cache.updateByteArray( new byte[0] ).identifiedBy( "TomNaso" );
> {code}
> WDYT?
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