Examples of org.castor.cache.Cache

org.castor.cache.Cache
Interface specification for performance caches as used in Castor. Please implement this interface if you wish to provide your own cache implementation.
At initialization each cache implementation gets passed a properties map containing key/value pairs. Apart of 3 reserved standard properties, individual once can be used to configure the cache behavier. The standard properties are:
type which is evaluated by the CacheFactoryRegistry and defines the requested cache type. If not set count-limited cahce will be used as default.
debug is also evaluated by the CacheFactoryRegistry and defines if the cache instance will be wrapped by a DebuggingCacheProxy to log debug messages at every access to the cache. If not set no debugging will take place.
name is used by AbstractBaseCache to set the name of the cache instance. At the moment every cache type available extends this AbstractBaseCache. The name does not influence internal behavier of the cache but is usefull to identify from which cache instance debug messages are coming from. By default castor uses the classname of the cached objects as name for the cache. If not present the name will be empty.
For a description of the individual properties you should have a look at the javadoc of the different cache types. It needs to be noted that only string keys and values are allowed. @author Werner Guttmann @author Ralf Joachim @version $Revision: 7950 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $ @since 1.0

        cache.clear();
        assertTrue(cache.isEmpty());
    }


    public void testGet() throws CacheAcquireException {
        Cache cache = initialize();


        assertEquals("first value", cache.get("first key"));
        assertEquals("second value", cache.get("second key"));
        assertEquals("third value", cache.get("third key"));
        assertNull(cache.get("fourth key"));
        assertNull(cache.get("fifth key"));
    }

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        assertNull(cache.get("fourth key"));
        assertNull(cache.get("fifth key"));
    }


    public void testPut() throws CacheAcquireException {
        Cache cache = initialize();


        assertEquals("third value", cache.put("third key", "alternate third value"));
        assertNull(cache.put("fourth key", "forth value"));


        assertTrue(cache.containsKey("first key"));
        assertTrue(cache.containsKey("second key"));
        assertTrue(cache.containsKey("third key"));
        assertTrue(cache.containsKey("fourth key"));
        assertFalse(cache.containsKey("fifth key"));
    }

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        assertTrue(cache.containsKey("fourth key"));
        assertFalse(cache.containsKey("fifth key"));
    }


    public void testRemove() throws CacheAcquireException {
        Cache cache = initialize();


        assertEquals("third value", cache.remove("third key"));


        assertTrue(cache.containsKey("first key"));
        assertTrue(cache.containsKey("second key"));
        assertFalse(cache.containsKey("third key"));
        assertFalse(cache.containsKey("fourth key"));
        assertFalse(cache.containsKey("fifth key"));
    }

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        assertFalse(cache.containsKey("fourth key"));
        assertFalse(cache.containsKey("fifth key"));
    }


    public void testPutAll() throws CacheAcquireException {
        Cache cache = initialize();


        HashMap map = new HashMap();
        map.put("fourth key", "forth value");
        map.put("fifth key", "fifth value");
        
        cache.putAll(map);
        
        assertTrue(cache.containsKey("first key"));
        assertTrue(cache.containsKey("second key"));
        assertTrue(cache.containsKey("third key"));
        assertTrue(cache.containsKey("fourth key"));
        assertTrue(cache.containsKey("fifth key"));
    }

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    public void testBasics() throws CacheAcquireException {
        assertEquals("time-limited", TimeLimited.TYPE);
        assertEquals("ttl", TimeLimited.PARAM_TTL);
        assertEquals(30, TimeLimited.DEFAULT_TTL);


        Cache cache = new TimeLimited();
        assertTrue(cache instanceof TimeLimited);


        assertEquals("time-limited", cache.getType());
        assertEquals(30, ((TimeLimited) cache).getTTL());
        assertEquals(Cache.DEFAULT_NAME, cache.getName());
        
        Properties params = new Properties();
        params.put(Cache.PARAM_NAME, "dummy1");
        cache.initialize(params);
        assertEquals(30, ((TimeLimited) cache).getTTL());
        assertEquals("dummy1", cache.getName());
        
        params.clear();
        params.put(Cache.PARAM_NAME, "dummy2");
        params.put(TimeLimited.PARAM_TTL, "-10");
        cache.initialize(params);
        assertEquals(30, ((TimeLimited) cache).getTTL());
        assertEquals("dummy2", cache.getName());
        
        params.clear();
        params.put(Cache.PARAM_NAME, "dummy3");
        params.put(TimeLimited.PARAM_TTL, "0");
        cache.initialize(params);
        assertEquals(30, ((TimeLimited) cache).getTTL());
        assertEquals("dummy3", cache.getName());
        
        params.clear();
        params.put(Cache.PARAM_NAME, "dummy4");
        params.put(TimeLimited.PARAM_TTL, "10");
        cache.initialize(params);
        assertEquals(10, ((TimeLimited) cache).getTTL());
        assertEquals("dummy4", cache.getName());
        
        assertFalse(cache.containsKey("first key"));
        assertFalse(cache.containsKey("second key"));


        assertNull(cache.put("first key", "first value"));


        assertTrue(cache.containsKey("first key"));
        assertFalse(cache.containsKey("second key"));


        assertNull(cache.put("second key", "second value"));


        assertTrue(cache.containsKey("first key"));
        assertTrue(cache.containsKey("second key"));
    }

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        assertTrue(cache.containsKey("fourth key"));
        assertTrue(cache.containsKey("fifth key"));
    }


    public void testKeySet() throws CacheAcquireException {
        Cache cache = initialize();


        Set set = cache.keySet();
        
        assertEquals(3, set.size());
        assertTrue(set.contains("first key"));
        assertTrue(set.contains("second key"));
        assertTrue(set.contains("third key"));

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        assertTrue(set.contains("second key"));
        assertTrue(set.contains("third key"));
    }


    public void testValues() throws CacheAcquireException {
        Cache cache = initialize();


        Collection col = cache.values();
        
        assertEquals(3, col.size());
        assertTrue(col.contains("first value"));
        assertTrue(col.contains("second value"));
        assertTrue(col.contains("third value"));

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        assertTrue(col.contains("second value"));
        assertTrue(col.contains("third value"));
    }


    public void testEntrySet() throws CacheAcquireException {
        Cache cache = initialize();


        Set set = cache.entrySet();
        
        assertEquals(3, set.size());
        
        Object[] objs = set.toArray();
        HashMap map = new HashMap();

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        assertTrue(cache.containsKey("first key"));
        assertTrue(cache.containsKey("second key"));
    }


    private Cache initialize() {
        Cache cache = new TimeLimited();


        try {
            Properties params = new Properties();
            params.put(Cache.PARAM_NAME, "dummy");
            params.put(TimeLimited.PARAM_TTL, new Integer(10));
            cache.initialize(params);
        } catch (CacheAcquireException ex) {
            fail("Unexpected CacheAcquireException at initialization.");
        }
        
        assertNull(cache.put("first key", "first value"));
        assertNull(cache.put("second key", "second value"));
        assertNull(cache.put("third key", "third value"));
        
        return cache;
    }

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        return cache;
    }
    
    public void testContainsKey() {
        Cache cache = initialize();


        assertTrue(cache.containsKey("first key"));
        assertTrue(cache.containsKey("second key"));
        assertTrue(cache.containsKey("third key"));
        assertFalse(cache.containsKey("fourth key"));
        assertFalse(cache.containsKey("fifth key"));
    }

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