org.apache.polygene.spi.cache.CachePool java code examples

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}

@Test
public void givenLoooongCacheNameWhenFetchingCacheExpectOk()
{
  Random random = new Random();
  StringBuilder longName = new StringBuilder();
  for( int i = 0; i < 10000; i++ )
  {
    longName.append( (char) ( random.nextInt( 26 ) + 65 ) );
  }
  cache = cachePool.fetchCache( longName.toString(), String.class );
}

@Override
public void tearDownJSONMapES()
  throws Exception
{
  if( caching != null )
  {
    caching.returnCache( cache );
    cache = null;
  }
}

  @Test
  public void givenCacheWithValueWhenDroppingReferenceAndRequestNewCacheAndItsValueExpectItToBeGone()
  {
    cache.put( "Habba", "Zout" );
    assertEquals( "Zout", cache.get( "Habba" ) );
    cachePool.returnCache( cache );
    cache = cachePool.fetchCache( "1", String.class );
    assertNull( "Value not missing", cache.get( "Habba" ) );
  }
}

  @Test
  public void givenCacheWithValueWhenDroppingReferenceAndRequestNewCacheAndItsValueExpectItToBeGone()
  {
    cache.put( "Habba", "Zout" );
    assertEquals( "Zout", cache.get( "Habba" ) );
    cachePool.returnCache( cache );
    cache = cachePool.fetchCache( "1", String.class );
    assertNull( "Value not missing", cache.get( "Habba" ) );
  }
}

@Test
public void givenLoooongCacheNameWhenFetchingCacheExpectOk()
{
  Random random = new Random();
  StringBuilder longName = new StringBuilder();
  for( int i = 0; i < 10000; i++ )
  {
    longName.append( (char) ( random.nextInt( 26 ) + 65 ) );
  }
  cache = cachePool.fetchCache( longName.toString(), String.class );
}

@Override
public void tearDownJSONMapES()
  throws Exception
{
  if( caching != null )
  {
    caching.returnCache( cache );
    cache = null;
  }
}

@Override
public void setUpJSONMapES()
  throws Exception
{
  uuid = descriptor.identity() + "-" + UUID.randomUUID().toString();
  if( caching != null )
  {
    cache = caching.fetchCache( uuid, CacheState.class );
  }
  else
  {
    cache = new NullCache<>();
  }
}

@Override
public void setUpJSONMapES()
  throws Exception
{
  uuid = descriptor.identity() + "-" + UUID.randomUUID().toString();
  if( caching != null )
  {
    cache = caching.fetchCache( uuid, CacheState.class );
  }
  else
  {
    cache = new NullCache<>();
  }
}

@Test
public void givenInvalidCacheNameWhenFetchingCacheExpectIllegalArgumentException()
{
  try
  {
    cache = cachePool.fetchCache( "", String.class );
    fail( "Expected " + IllegalArgumentException.class.getSimpleName() );
  }
  catch( IllegalArgumentException e )
  {
    // expected
  }
}

@Test
public void givenInvalidCacheNameWhenFetchingCacheExpectIllegalArgumentException()
{
  try
  {
    cache = cachePool.fetchCache( "", String.class );
    fail( "Expected " + IllegalArgumentException.class.getSimpleName() );
  }
  catch( IllegalArgumentException e )
  {
    // expected
  }
}

@Override
public void setUp()
  throws Exception
{
  super.setUp();
  cachePool = module.instance().findService( CachePool.class ).get();
  cache = cachePool.fetchCache( "1", String.class );
}

@Override
public void setUp()
  throws Exception
{
  super.setUp();
  cachePool = module.instance().findService( CachePool.class ).get();
  cache = cachePool.fetchCache( "1", String.class );
}

@Test
public void givenNullKeyWhenFetchingCacheExpectConstraintViolationException()
{
  try
  {
    cache = cachePool.fetchCache( null, String.class );
    fail( "Expected " + ConstraintViolationException.class.getSimpleName() );
  }
  catch( ConstraintViolationException e )
  {
    // expected
    Collection<ValueConstraintViolation> violations = e.constraintViolations();
    assertEquals( 1, violations.size() );
    ValueConstraintViolation violation = violations.iterator().next();
    assertEquals( "not optional", violation.constraint().toString() );
    assertThat( violation.name(), anyOf(equalTo("cacheId"), equalTo( "arg0" )) );  // depends on whether -parameters was given at compile time.
  }
}

@Test
public void givenNullKeyWhenFetchingCacheExpectConstraintViolationException()
{
  try
  {
    cache = cachePool.fetchCache( null, String.class );
    fail( "Expected " + ConstraintViolationException.class.getSimpleName() );
  }
  catch( ConstraintViolationException e )
  {
    // expected
    Collection<ValueConstraintViolation> violations = e.constraintViolations();
    assertEquals( 1, violations.size() );
    ValueConstraintViolation violation = violations.iterator().next();
    assertEquals( "not optional", violation.constraint().toString() );
    assertThat( violation.name(), anyOf(equalTo("cacheId"), equalTo( "arg0" )) );  // depends on whether -parameters was given at compile time.
  }
}

Javadoc

A CachePool is a service that manages the Persistence Caches.

The CachePool is typically implemented as a Polygene Extension, and is an optional extension in the persistence subsystem of Polygene. If a Cache Extension is not provided, caching will be turned off. However, since caching operate on EntityStore level, and is an optional component at that, just because you have defined a Cache Extension does not necessary mean that your system will use it. Check the EntityStore implementations for details if they are Cache enabled. Most EntityStore implementations has this enabled, often via the MapEntityStore and JSONMapEntityStore SPI.

NOTE: Make sure that there is a match between the fetchCache and returnCache methods, to ensure no memory leakage occur. Also remember that if the reference count reaches zero, the CachePool will destroy the Cache as soon as possible and a new fetchCache will return an empty one.

Most used methods

fetchCache
Fetches a cache from the pool. If the cache does not exist already, then a new Cache should be creat
returnCache
Returns the cache back to the pool. The reference count for the cache must then be decreased and if

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How to useCachePool in org.apache.polygene.spi.cache

Best Java code snippets using org.apache.polygene.spi.cache.CachePool (Showing top 14 results out of 315)

How to use
CachePool
in
org.apache.polygene.spi.cache