redis cluster java example
Redis Cluster 에 대한 java example입니다.
LettuceClusterTest.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 |
import java.util.ArrayList; import java.util.List; import java.util.concurrent.Future; import java.util.concurrent.TimeUnit; import org.apache.commons.pool2.impl.GenericObjectPool; import org.apache.commons.pool2.impl.GenericObjectPoolConfig; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import io.lettuce.core.RedisURI; import io.lettuce.core.cluster.RedisClusterClient; import io.lettuce.core.cluster.api.StatefulRedisClusterConnection; import io.lettuce.core.cluster.api.async.RedisAdvancedClusterAsyncCommands; import io.lettuce.core.support.ConnectionPoolSupport; public class LettuceClusterTest { private static final Logger log = LoggerFactory.getLogger(LettuceClusterTest.class); private static String lettuceHost = "10.0.0.220:6379,10.0.0.221:6379,10.0.0.222:6379"; private static RedisClusterClient redisClusterClient; private static StatefulRedisClusterConnection<String, Object> redisClusterConnection; private static RedisAdvancedClusterAsyncCommands<String, Object> redisClusterAsyncCommands; private static GenericObjectPool<StatefulRedisClusterConnection<String, Object>> pool; public static boolean isConnectSuccess = false; private static int lettuceDefaultTimeout = 3; private static int lettuceDefaultExpireTime = 60; public static void getConnection() { log.debug("■ LettuceUtil getConnection start..."); try { if(lettuceHost != null) { String [] lettuceHostList = lettuceHost.split(","); List<RedisURI> redisURIList = new ArrayList<RedisURI>(); for(int i = 0 ; i < lettuceHostList.length ; i++) { String [] lettuceAdminHostPort = lettuceHostList[i].split(":"); String host = lettuceAdminHostPort[0]; int port = Integer.parseInt( lettuceAdminHostPort[1] ); RedisURI node = RedisURI.Builder.redis(host).withPort(port).build(); redisURIList.add(node); } redisClusterClient = RedisClusterClient.create(redisURIList); pool = ConnectionPoolSupport .createGenericObjectPool(() -> redisClusterClient.connect(new SerializedObjectCodec()), new GenericObjectPoolConfig()); redisClusterConnection = pool.borrowObject(); redisClusterAsyncCommands = redisClusterConnection.async(); log.debug("■ LettuceClientPool created..."); } /** * LETTUCE lettuceAdmin Null 일경우 */ else { log.debug("■ LettuceCache lettuceHost value is Null."); } if (redisClusterClient != null) { isConnectSuccess = true; } } catch (Exception e) { log.error("■ Error : " + e.getMessage(), e); isConnectSuccess = false; } } /** * LETTUCE 연결종료 */ public static void closeConnection() { log.debug("■ LettuceClient closeConnection start..."); if (redisClusterClient != null) { log.error("■ LettuceClient is null."); return; } try { redisClusterConnection.closeAsync(); pool.close(); redisClusterClient.shutdown(); log.debug("■ LettuceClient closed..."); } catch (Exception e) { log.error("■ 에러 : " + e.getMessage(), e); } } public static boolean setKeyValue(String key, Object obj, int expireTime) { return setKeyValue(key, obj, expireTime, 0); } /** * Key-Value Item 저장 * */ public static boolean setKeyValue(String key, Object obj, int expireTime, int timeout) { if (log.isDebugEnabled()) { log.debug("■ LettuceCache Key : " + key); log.debug("■ LettuceCache Set obj : " + obj); log.debug("■ LettuceCache ExpireTime : " + expireTime); log.debug("■ LettuceCache Timeout : " + timeout); } boolean result = false; if (obj == null) { if (log.isDebugEnabled()) { log.debug("■■■]] LettuceCache set value is null."); } return false; } if (!isConnectSuccess) { return false; } if (expireTime == 0) { expireTime = lettuceDefaultExpireTime; } if (timeout == 0) { timeout = lettuceDefaultTimeout; } Future<String> future = null; try { future = redisClusterAsyncCommands.set(key, obj); redisClusterAsyncCommands.expire(key, expireTime); if (future == null) { if (log.isDebugEnabled()) { log.debug("■ LettuceCache set fail."); } return false; } long lettuceTimeout = timeout * 1000; String resultFutureString = future.get(lettuceTimeout, TimeUnit.MILLISECONDS); if("OK".equals(resultFutureString)) { result = true; } if (log.isDebugEnabled()) { log.debug("■ LettuceCache set success."); } } catch (Exception e) { log.error("■ Error : " + e.getMessage(), e); return false; } return result; } public static Object getKeyValue(String key) { return getKeyValue(key, 0); } /** * Key-Value Item 조회 * */ public static Object getKeyValue(String key, int timeout) { Object result = null; if (!isConnectSuccess) { if (log.isDebugEnabled()) { log.debug("■ LettuceCache Connection value is false."); } return null; } if (timeout == 0) { timeout = lettuceDefaultTimeout; } Future<Object> future = null; try { future = redisClusterAsyncCommands.get(key); if (future == null) { if (log.isDebugEnabled()) { log.debug("■ LettuceCache get value is null"); } return null; } long lettuceTimeout = timeout * 1000; result = future.get(lettuceTimeout, TimeUnit.MILLISECONDS); if (log.isDebugEnabled()) { log.debug("■ LettuceCache Result : " + result); } } catch (Exception e) { log.error("■ Error : " + e.getMessage(), e); if (future != null) { future.cancel(true); } return null; } return result; } public static void main(String[] args) { getConnection(); String key = "testKey"; setKeyValue(key, "testValue", 60); log.info("getKeyValue : " + getKeyValue(key)); } } |
SerializedObjectCodec.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 |
import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.nio.ByteBuffer; import java.nio.charset.Charset; import io.lettuce.core.codec.RedisCodec; public class SerializedObjectCodec implements RedisCodec<String, Object> { private Charset charset = Charset.forName("UTF-8"); @Override public String decodeKey(ByteBuffer bytes) { return charset.decode(bytes).toString(); } @Override public Object decodeValue(ByteBuffer bytes) { try { byte[] array = new byte[bytes.remaining()]; bytes.get(array); ObjectInputStream is = new ObjectInputStream(new ByteArrayInputStream(array)); return is.readObject(); } catch (Exception e) { return null; } } @Override public ByteBuffer encodeKey(String key) { return charset.encode(key); } @Override public ByteBuffer encodeValue(Object value) { try { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); ObjectOutputStream os = new ObjectOutputStream(bytes); os.writeObject(value); return ByteBuffer.wrap(bytes.toByteArray()); } catch (IOException e) { return null; } } } |