Redis-分布式

 

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package test.jedis; import java.util.HashSet; import java.util.Set; import org.junit.Test; import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisSentinelPool; /**  * 分布式redis 操作  * 没有多台机器,在同一台机器上多个redis 实例来模拟多台机器测试  *  * */ public class SentinelPoolTest {           @Test     public void testJedis() throws InterruptedException {         Set<String> sentinels = new HashSet<String>();         sentinels.add("127.0.0.1:6377");         sentinels.add("127.0.0.1:6378");         sentinels.add("127.0.0.1:6379");                  JedisSentinelPool sentinelPool = new JedisSentinelPool("master_test",sentinels);         Jedis jedis = sentinelPool.getResource();         System.out.println("current Host:" + sentinelPool.getCurrentHostMaster());         String key = "current key";         String cacheData = jedis.get(key);         if (cacheData == null) {             jedis.del(key);         }         jedis.set(key, "write data");// 写入         System.out.println(jedis.get(key));// 读取         System.out.println("current Host:"  + sentinelPool.getCurrentHostMaster());// down掉master，观察slave是否被提升为master         jedis.set(key, "bbb");// 测试新master的写入         System.out.println(jedis.get(key));// 观察读取是否正常         sentinelPool.returnResource(jedis);         jedis.disconnect();     } }