public long getByteCount()

in commons-jcs3-core/src/main/java/org/apache/commons/jcs3/admin/JCSAdminBean.java [236:299]
54 lines of code
8 McCabe index (conditional complexity)

    public <K, V> long getByteCount(final CompositeCache<K, V> cache)
    {
        if (cache == null)
        {
            throw new IllegalArgumentException("The cache object specified was null.");
        }

        long size = 0;
        final IMemoryCache<K, V> memCache = cache.getMemoryCache();

        for (final K key : memCache.getKeySet())
        {
            ICacheElement<K, V> ice = null;
			try
			{
				ice = memCache.get(key);
			}
			catch (final IOException e)
			{
                throw new IllegalStateException("IOException while trying to get a cached element", e);
			}

			if (ice == null)
			{
				continue;
			}

			if (ice instanceof CacheElementSerialized)
            {
                size += ((CacheElementSerialized<K, V>) ice).getSerializedValue().length;
            }
            else
            {
                final Object element = ice.getVal();

                //CountingOnlyOutputStream: Keeps track of the number of bytes written to it, but doesn't write them anywhere.
                final CountingOnlyOutputStream counter = new CountingOnlyOutputStream();
                try (ObjectOutputStream out = new ObjectOutputStream(counter))
                {
                    out.writeObject(element);
                }
                catch (final IOException e)
                {
                    throw new IllegalStateException("IOException while trying to measure the size of the cached element", e);
                }
                finally
                {
                	try
                	{
						counter.close();
					}
                	catch (final IOException e)
                	{
                		// ignore
					}
                }

                // 4 bytes lost for the serialization header
                size += counter.getCount() - 4;
            }
        }

        return size;
    }