Putting Object to Cache

package com.cacheonix.examples.cache;

import junit.framework.TestCase;
import cacheonix.cache.Cache;
import cacheonix.cache.CacheManager;

/**
 * Tester for Cache.
 */
public final class CacheTest extends TestCase {

   /**
    * MAX_SIZE is configured for {@link TEST_CACHE} in the cacheonix-config.xml.
    */
   private static final int MAX_SIZE = 1000;
   private static final String TEST_CACHE = "local.test.cache";

   private static final Object KEY = "key";
   private static final Object VALUE = "value";
   private static final Object VALUE_1 = "value1";
   private static final Object VALUE_2 = "value2";

   private CacheManager cacheManager;


   /**
    * Tests putting an object to the cache.
    */
   public void testPut() {

      final Cache cache = cacheManager.getCache(TEST_CACHE);

      // Put an object to the cache
      final Object replacedValue1 = cache.put(KEY, VALUE_1);
      assertNull(replacedValue1);
      assertEquals(VALUE_1, cache.get(KEY));

      // Put another object using the same key
      final Object replacedValue2 = cache.put(KEY, VALUE_2);
      assertEquals(VALUE_1, replacedValue2);
      assertEquals(VALUE_2, cache.get(KEY));
   }


   /**
    * Tests putting an object to the cache evicts objects
    * when number of unique puts exceeds maximum cache size.
    */
   public void testPutEvictsObjects() {

      final Cache cache = cacheManager.getCache(TEST_CACHE);

      // Put objects to the cache with number objects exeeding maximum cache size
      for (int i = 0; i < MAX_SIZE * 2; i++) {
         final String index = Integer.toString(i);
         cache.put(KEY + index, VALUE + index);
      }

      assertEquals(MAX_SIZE, cache.size());
   }


   /**
    * Sets up the fixture. This method is called before a test is executed.
    */
   protected void setUp() throws Exception {
      super.setUp();
      cacheManager = CacheManager.getInstance();
   }


   /**
    * Tears down the fixture. This method is called after a test is executed.
    */
   protected void tearDown() throws Exception {
      // Cache manager has to be shutdown upon application exit
      cacheManager.shutdown();
      super.tearDown();
   }
}