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 Apache DirectMemory Simple Usage
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 Olivier Lamy
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 2012-10-03
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DirectMemory Simple Usage


  Add a dependency to the DirectMemory cache artifact:

+------------------------
  <dependency>
    <groupId>org.apache.directmemory</groupId>
    <artifactId>directmemory-cache</artifactId>
    <version>${currentRelease}</version>
  </dependency>
+------------------------

  Create your {{{./apidocs/reference/org/apache/directmemory/cache/CacheService.html}CacheService}} instance:

+------------------------
  CacheService<Object, Object> cacheService = new DirectMemory<Object, Object>()
    .setNumberOfBuffers( 10 )
    .setSize( 1000 )
    .setInitialCapacity( 100000 )
    .setConcurrencyLevel( 4 )
    .newCacheService();
+------------------------

  Use the cache service to store object, Those methods returns a {{{./apidocs/reference/org/apache/directmemory/memory/Pointer.html}Pointer}} if this pointer is null your object has not been stored:

+------------------------
  put( K key, V value )
  put( K key, V value, int expiresIn )
+------------------------

  Retrieve an Object from the cache service:

+------------------------
  V retrieve( K key );
+------------------------

  Clear at the end of usage and close the CacheService

+------------------------
  cacheService.clear();
  cacheService.close(); // close() is available in 0.2+ only
+------------------------