| 1 | package net.spy.memcached; |
| 2 | |
| 3 | import java.io.IOException; |
| 4 | import java.net.InetSocketAddress; |
| 5 | import java.net.SocketAddress; |
| 6 | import java.nio.channels.SocketChannel; |
| 7 | import java.util.Collection; |
| 8 | import java.util.Collections; |
| 9 | import java.util.List; |
| 10 | import java.util.concurrent.ArrayBlockingQueue; |
| 11 | import java.util.concurrent.BlockingQueue; |
| 12 | import java.util.concurrent.LinkedBlockingQueue; |
| 13 | |
| 14 | import net.spy.memcached.compat.SpyObject; |
| 15 | import net.spy.memcached.ops.Operation; |
| 16 | import net.spy.memcached.protocol.ascii.AsciiMemcachedNodeImpl; |
| 17 | import net.spy.memcached.protocol.ascii.AsciiOperationFactory; |
| 18 | import net.spy.memcached.protocol.binary.BinaryMemcachedNodeImpl; |
| 19 | import net.spy.memcached.protocol.binary.BinaryOperationFactory; |
| 20 | import net.spy.memcached.transcoders.SerializingTranscoder; |
| 21 | import net.spy.memcached.transcoders.Transcoder; |
| 22 | |
| 23 | /** |
| 24 | * Default implementation of ConnectionFactory. |
| 25 | * |
| 26 | * <p> |
| 27 | * This implementation creates connections where the operation queue is an |
| 28 | * ArrayBlockingQueue and the read and write queues are unbounded |
| 29 | * LinkedBlockingQueues. The <code>Redistribute</code> FailureMode is used |
| 30 | * by default. |
| 31 | * </p> |
| 32 | */ |
| 33 | public class DefaultConnectionFactory extends SpyObject |
| 34 | implements ConnectionFactory { |
| 35 | |
| 36 | /** |
| 37 | * Default failure mode. |
| 38 | */ |
| 39 | public static final FailureMode DEFAULT_FAILURE_MODE = |
| 40 | FailureMode.Redistribute; |
| 41 | |
| 42 | /** |
| 43 | * Default hash algorithm. |
| 44 | */ |
| 45 | public static final HashAlgorithm DEFAULT_HASH = HashAlgorithm.NATIVE_HASH; |
| 46 | |
| 47 | /** |
| 48 | * Maximum length of the operation queue returned by this connection |
| 49 | * factory. |
| 50 | */ |
| 51 | public static final int DEFAULT_OP_QUEUE_LEN=16384; |
| 52 | |
| 53 | /** |
| 54 | * The read buffer size for each server connection from this factory. |
| 55 | */ |
| 56 | public static final int DEFAULT_READ_BUFFER_SIZE=16384; |
| 57 | |
| 58 | /** |
| 59 | * Default operation timeout in milliseconds. |
| 60 | */ |
| 61 | public static final long DEFAULT_OPERATION_TIMEOUT = 1000; |
| 62 | |
| 63 | /** |
| 64 | * Maximum amount of time (in seconds) to wait between reconnect attempts. |
| 65 | */ |
| 66 | public static final long DEFAULT_MAX_RECONNECT_DELAY = 30; |
| 67 | |
| 68 | private final int opQueueLen; |
| 69 | private final int readBufSize; |
| 70 | private final HashAlgorithm hashAlg; |
| 71 | |
| 72 | /** |
| 73 | * Construct a DefaultConnectionFactory with the given parameters. |
| 74 | * |
| 75 | * @param qLen the queue length. |
| 76 | * @param bufSize the buffer size |
| 77 | * @param hash the algorithm to use for hashing |
| 78 | */ |
| 79 | public DefaultConnectionFactory(int qLen, int bufSize, HashAlgorithm hash) { |
| 80 | super(); |
| 81 | opQueueLen=qLen; |
| 82 | readBufSize=bufSize; |
| 83 | hashAlg=hash; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Create a DefaultConnectionFactory with the given maximum operation |
| 88 | * queue length, and the given read buffer size. |
| 89 | */ |
| 90 | public DefaultConnectionFactory(int qLen, int bufSize) { |
| 91 | this(qLen, bufSize, DEFAULT_HASH); |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Create a DefaultConnectionFactory with the default parameters. |
| 96 | */ |
| 97 | public DefaultConnectionFactory() { |
| 98 | this(DEFAULT_OP_QUEUE_LEN, DEFAULT_READ_BUFFER_SIZE); |
| 99 | } |
| 100 | |
| 101 | public MemcachedNode createMemcachedNode(SocketAddress sa, |
| 102 | SocketChannel c, int bufSize) { |
| 103 | |
| 104 | OperationFactory of = getOperationFactory(); |
| 105 | if(of instanceof AsciiOperationFactory) { |
| 106 | return new AsciiMemcachedNodeImpl(sa, c, bufSize, |
| 107 | createReadOperationQueue(), |
| 108 | createWriteOperationQueue(), |
| 109 | createOperationQueue()); |
| 110 | } else if(of instanceof BinaryOperationFactory) { |
| 111 | return new BinaryMemcachedNodeImpl(sa, c, bufSize, |
| 112 | createReadOperationQueue(), |
| 113 | createWriteOperationQueue(), |
| 114 | createOperationQueue()); |
| 115 | } else { |
| 116 | throw new IllegalStateException( |
| 117 | "Unhandled operation factory type " + of); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* (non-Javadoc) |
| 122 | * @see net.spy.memcached.ConnectionFactory#createConnection(java.util.List) |
| 123 | */ |
| 124 | public MemcachedConnection createConnection(List<InetSocketAddress> addrs) |
| 125 | throws IOException { |
| 126 | return new MemcachedConnection(getReadBufSize(), this, addrs, |
| 127 | getInitialObservers(), getFailureMode(), getOperationFactory()); |
| 128 | } |
| 129 | |
| 130 | /* (non-Javadoc) |
| 131 | * @see net.spy.memcached.ConnectionFactory#getFailureMode() |
| 132 | */ |
| 133 | public FailureMode getFailureMode() { |
| 134 | return DEFAULT_FAILURE_MODE; |
| 135 | } |
| 136 | |
| 137 | /* (non-Javadoc) |
| 138 | * @see net.spy.memcached.ConnectionFactory#createOperationQueue() |
| 139 | */ |
| 140 | public BlockingQueue<Operation> createOperationQueue() { |
| 141 | return new ArrayBlockingQueue<Operation>(getOpQueueLen()); |
| 142 | } |
| 143 | |
| 144 | /* (non-Javadoc) |
| 145 | * @see net.spy.memcached.ConnectionFactory#createReadOperationQueue() |
| 146 | */ |
| 147 | public BlockingQueue<Operation> createReadOperationQueue() { |
| 148 | return new LinkedBlockingQueue<Operation>(); |
| 149 | } |
| 150 | |
| 151 | /* (non-Javadoc) |
| 152 | * @see net.spy.memcached.ConnectionFactory#createWriteOperationQueue() |
| 153 | */ |
| 154 | public BlockingQueue<Operation> createWriteOperationQueue() { |
| 155 | return new LinkedBlockingQueue<Operation>(); |
| 156 | } |
| 157 | |
| 158 | /* (non-Javadoc) |
| 159 | * @see net.spy.memcached.ConnectionFactory#createLocator(java.util.List) |
| 160 | */ |
| 161 | public NodeLocator createLocator(List<MemcachedNode> nodes) { |
| 162 | return new ArrayModNodeLocator(nodes, getHashAlg()); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Get the op queue length set at construct time. |
| 167 | */ |
| 168 | public int getOpQueueLen() { |
| 169 | return opQueueLen; |
| 170 | } |
| 171 | |
| 172 | /* (non-Javadoc) |
| 173 | * @see net.spy.memcached.ConnectionFactory#getReadBufSize() |
| 174 | */ |
| 175 | public int getReadBufSize() { |
| 176 | return readBufSize; |
| 177 | } |
| 178 | |
| 179 | /* (non-Javadoc) |
| 180 | * @see net.spy.memcached.ConnectionFactory#getHashAlg() |
| 181 | */ |
| 182 | public HashAlgorithm getHashAlg() { |
| 183 | return hashAlg; |
| 184 | } |
| 185 | |
| 186 | /* (non-Javadoc) |
| 187 | * @see net.spy.memcached.ConnectionFactory#getOperationFactory() |
| 188 | */ |
| 189 | public OperationFactory getOperationFactory() { |
| 190 | return new AsciiOperationFactory(); |
| 191 | } |
| 192 | |
| 193 | /* (non-Javadoc) |
| 194 | * @see net.spy.memcached.ConnectionFactory#getOperationTimeout() |
| 195 | */ |
| 196 | public long getOperationTimeout() { |
| 197 | return DEFAULT_OPERATION_TIMEOUT; |
| 198 | } |
| 199 | |
| 200 | /* (non-Javadoc) |
| 201 | * @see net.spy.memcached.ConnectionFactory#isDaemon() |
| 202 | */ |
| 203 | public boolean isDaemon() { |
| 204 | return false; |
| 205 | } |
| 206 | |
| 207 | /* (non-Javadoc) |
| 208 | * @see net.spy.memcached.ConnectionFactory#getInitialObservers() |
| 209 | */ |
| 210 | public Collection<ConnectionObserver> getInitialObservers() { |
| 211 | return Collections.emptyList(); |
| 212 | } |
| 213 | |
| 214 | /* (non-Javadoc) |
| 215 | * @see net.spy.memcached.ConnectionFactory#getDefaultTranscoder() |
| 216 | */ |
| 217 | public Transcoder<Object> getDefaultTranscoder() { |
| 218 | return new SerializingTranscoder(); |
| 219 | } |
| 220 | |
| 221 | /* (non-Javadoc) |
| 222 | * @see net.spy.memcached.ConnectionFactory#useNagleAlgorithm() |
| 223 | */ |
| 224 | public boolean useNagleAlgorithm() { |
| 225 | return false; |
| 226 | } |
| 227 | |
| 228 | /* (non-Javadoc) |
| 229 | * @see net.spy.memcached.ConnectionFactory#shouldOptimize() |
| 230 | */ |
| 231 | public boolean shouldOptimize() { |
| 232 | return true; |
| 233 | } |
| 234 | |
| 235 | /* (non-Javadoc) |
| 236 | * @see net.spy.memcached.ConnectionFactory#getMaxReconnectDelay() |
| 237 | */ |
| 238 | public long getMaxReconnectDelay() { |
| 239 | return DEFAULT_MAX_RECONNECT_DELAY; |
| 240 | } |
| 241 | |
| 242 | } |