| 1 | package net.spy.memcached; |
| 2 | |
| 3 | import java.util.List; |
| 4 | |
| 5 | /** |
| 6 | * ConnectionFactory instance that sets up a ketama compatible connection. |
| 7 | * |
| 8 | * <p> |
| 9 | * This implementation piggy-backs on the functionality of the |
| 10 | * <code>DefaultConnectionFactory</code> in terms of connections and queue |
| 11 | * handling. Where it differs is that it uses both the <code> |
| 12 | * KetamaNodeLocator</code> and the <code>HashAlgorithm.KETAMA_HASH</code> |
| 13 | * to provide consistent node hashing. |
| 14 | * </p> |
| 15 | * |
| 16 | * @see <a href="http://www.last.fm/user/RJ/journal/2007/04/10/392555/">RJ's blog post</a> |
| 17 | */ |
| 18 | public class KetamaConnectionFactory extends DefaultConnectionFactory { |
| 19 | /** |
| 20 | * Create a KetamaConnectionFactory with the given maximum operation |
| 21 | * queue length, and the given read buffer size. |
| 22 | */ |
| 23 | public KetamaConnectionFactory(int qLen, int bufSize) { |
| 24 | super(qLen, bufSize, HashAlgorithm.KETAMA_HASH); |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Create a KetamaConnectionFactory with the default parameters. |
| 29 | */ |
| 30 | public KetamaConnectionFactory() { |
| 31 | this(DEFAULT_OP_QUEUE_LEN, DEFAULT_READ_BUFFER_SIZE); |
| 32 | } |
| 33 | |
| 34 | /* (non-Javadoc) |
| 35 | * @see net.spy.memcached.ConnectionFactory#createLocator(java.util.List) |
| 36 | */ |
| 37 | @Override |
| 38 | public NodeLocator createLocator(List<MemcachedNode> nodes) { |
| 39 | return new KetamaNodeLocator(nodes, getHashAlg()); |
| 40 | } |
| 41 | } |