Examples of org.apache.jcs.engine.memory.MemoryCacheMockImpl

org.apache.jcs.engine.memory.MemoryCacheMockImpl
Mock implementation of a memory cache for testing things like the memory shrinker.
@author Aaron Smuts

        }


        cache.dispose();


        // VERIFY
        MemoryCacheMockImpl memoryCache = (MemoryCacheMockImpl) cache.getMemoryCache();
        assertEquals( "Wrong number freed.", numToInsert, memoryCache.lastNumberOfFreedElements );
    }

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        }


        cache.dispose();


        // VERIFY
        MemoryCacheMockImpl memoryCache = (MemoryCacheMockImpl) cache.getMemoryCache();
        assertEquals( "Wrong number freed.", 0, memoryCache.lastNumberOfFreedElements );
    }

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     *
     */
    public void testSimpleShrink()
        throws Exception
    {
        MemoryCacheMockImpl memory = new MemoryCacheMockImpl();


        CompositeCacheAttributes cacheAttr = new CompositeCacheAttributes();
        cacheAttr.setMaxMemoryIdleTimeSeconds( 1 );
        cacheAttr.setMaxSpoolPerRun( 10 );


        memory.setCacheAttributes( cacheAttr );


        String key = "key";
        String value = "value";


        ICacheElement element = new CacheElement( "testRegion", key, value );


        ElementAttributes elementAttr = new ElementAttributes();
        elementAttr.setIsEternal( false );
        element.setElementAttributes( elementAttr );
        element.getElementAttributes().setMaxLifeSeconds( 1 );
        memory.update( element );


        ICacheElement returnedElement1 = memory.get( key );
        assertNotNull( "We should have received an element", returnedElement1 );


        // set this to 2 seconds ago.
        elementAttr.lastAccessTime = System.currentTimeMillis() - 2000;


        ShrinkerThread shrinker = new ShrinkerThread( memory );
        Thread runner = new Thread( shrinker );
        runner.run();


        Thread.sleep( 500 );


        ICacheElement returnedElement2 = memory.get( key );
        assertTrue( "Waterfall should have been called.", memory.waterfallCallCount > 0 );
        assertNull( "We not should have received an element.  It should have been spooled.", returnedElement2 );
    }

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     * @throws Exception
     */
    public void testSimpleShrinkMutiple()
        throws Exception
    {
        MemoryCacheMockImpl memory = new MemoryCacheMockImpl();


        CompositeCacheAttributes cacheAttr = new CompositeCacheAttributes();
        cacheAttr.setMaxMemoryIdleTimeSeconds( 1 );
        cacheAttr.setMaxSpoolPerRun( 3 );


        memory.setCacheAttributes( cacheAttr );


        for ( int i = 0; i < 10; i++ )
        {
            String key = "key" + i;
            String value = "value";


            ICacheElement element = new CacheElement( "testRegion", key, value );


            ElementAttributes elementAttr = new ElementAttributes();
            elementAttr.setIsEternal( false );
            element.setElementAttributes( elementAttr );
            element.getElementAttributes().setMaxLifeSeconds( 1 );
            memory.update( element );


            ICacheElement returnedElement1 = memory.get( key );
            assertNotNull( "We should have received an element", returnedElement1 );


            // set this to 2 seconds ago.
            elementAttr.lastAccessTime = System.currentTimeMillis() - 2000;
        }


        ShrinkerThread shrinker = new ShrinkerThread( memory );
        Thread runner = new Thread( shrinker );
        runner.run();


        Thread.sleep( 500 );


        assertEquals( "Waterfall called the wrong number of times.", 3, memory.waterfallCallCount );


        assertEquals( "Wrong number of elements remain.", 7, memory.getSize() );
    }

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     * @throws Exception
     */
    public void testSimpleShrinkMutipleWithEventHandler()
    throws Exception
{
    MemoryCacheMockImpl memory = new MemoryCacheMockImpl();


    CompositeCacheAttributes cacheAttr = new CompositeCacheAttributes();
    cacheAttr.setMaxMemoryIdleTimeSeconds( 1 );
    cacheAttr.setMaxSpoolPerRun( 3 );


    memory.setCacheAttributes( cacheAttr );


    ElementEventHandlerMockImpl handler = new ElementEventHandlerMockImpl();


    for ( int i = 0; i < 10; i++ )
    {
        String key = "key" + i;
        String value = "value";


        ICacheElement element = new CacheElement( "testRegion", key, value );


        ElementAttributes elementAttr = new ElementAttributes();
        elementAttr.addElementEventHandler( handler );
        elementAttr.setIsEternal( false );
        element.setElementAttributes( elementAttr );
        element.getElementAttributes().setMaxLifeSeconds( 1 );
        memory.update( element );


        ICacheElement returnedElement1 = memory.get( key );
        assertNotNull( "We should have received an element", returnedElement1 );


        // set this to 2 seconds ago.
        elementAttr.lastAccessTime = System.currentTimeMillis() - 2000;
    }


    ShrinkerThread shrinker = new ShrinkerThread( memory );
    Thread runner = new Thread( shrinker );
    runner.run();


    Thread.sleep( 500 );


    assertEquals( "Waterfall called the wrong number of times.", 3, memory.waterfallCallCount );


    // the shrinker delegates the the composite cache on the memory cache to put the
    // event on the queue.  This make it hard to test.  TODO we need to change this to make it easier to verify.
    //assertEquals( "Event handler ExceededIdleTimeBackground called the wrong number of times.", 3, handler.getExceededIdleTimeBackgroundCount() );


    assertEquals( "Wrong number of elements remain.", 7, memory.getSize() );
}

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Related Classes of org.apache.jcs.engine.memory.MemoryCacheMockImpl

org.apache.jcs.engine.control.CompositeCacheUnitTest

org.apache.jcs.engine.memory.shrinking.ShrinkerThreadUnitTest

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