Redis集群中添加数据，删除某个前缀开头的数据

Myth丶恋晨 2022-03-08 07:49 463阅读 0赞

maven pom.xml中添加相关的包

<dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-pool2</artifactId>
        <version>2.4.2</version>
    </dependency>
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.9.0</version>
    </dependency>

编写测试类：

package redis;
    
    import redis.clients.jedis.*;
    import java.util.*;
    
    public class RedisUtilMain {
    
        //日志储存key的前缀
        private static final String REDIS_KEY_PREFIX = "Test:log:";
        public static void main(String[] args) {
            JedisCluster jedisCluster = getJedisCluster();
            //redis中添加数据
            for (int i=0;i<500;i++){
                jedisCluster.set(REDIS_KEY_PREFIX+UUID.randomUUID().toString(),UUID.randomUUID().toString());
                jedisCluster.set(REDIS_KEY_PREFIX+"partition:0:"+UUID.randomUUID().toString(),UUID.randomUUID().toString());
            }
            //只删除test:log:开头的不删除test:log:partition:开头的消息
            Set<String> allKeys = keys(REDIS_KEY_PREFIX +  "*", jedisCluster);
            System.out.println("key size:" + allKeys.size());
            for (String key:allKeys){
                if(!(key.contains(REDIS_KEY_PREFIX+ "partition:"))){
                    jedisCluster.del(key);
                    System.out.println(key);
                }
            }
        }
        /**
         * redis集群keys方法
         * @param pattern
         * @param jedisCluster
         * @return
         */
        public static TreeSet<String> keys(String pattern, JedisCluster jedisCluster){
            TreeSet<String> keys = new TreeSet<>();
            Map<String, JedisPool> clusterNodes = jedisCluster.getClusterNodes();
            for(String k : clusterNodes.keySet()){
                JedisPool jp = clusterNodes.get(k);
                Jedis connection = jp.getResource();
                try {
                    keys.addAll(connection.keys(pattern));
                } catch(Exception e){
                } finally{
                    //logger.debug("Connection closed.");
                    connection.close();
                }
            }
            return keys;
        }
        static JedisCluster getJedisCluster(){
            List<String> hostAndPortList = new ArrayList<>();
    
            hostAndPortList.add("192.168.1.147:7000");
            hostAndPortList.add("192.168.1.147:7001");
            hostAndPortList.add("192.168.1.148:7002");
            hostAndPortList.add("192.168.1.148:7003");
            hostAndPortList.add("192.168.1.149:7004");
            hostAndPortList.add("192.168.1.149:7005");
            int timeOut = 5000;
            int maxAttempts = 10000000;
    
            JedisPoolConfig config = new JedisPoolConfig();
            config.setMaxTotal(10);
            config.setMaxIdle(10);
            config.setMinIdle(1);
            config.setMaxWaitMillis(20*1000);
            config.setTestOnBorrow(true);
    
            Set<HostAndPort> nodes = new LinkedHashSet<HostAndPort>();
            for (String hostAndPort : hostAndPortList) {
                String[] host_port = hostAndPort.split(":");
                String host = host_port[0];
                int port = Integer.parseInt(host_port[1]);
                nodes.add(new HostAndPort(host, port));
            }
    
            JedisCluster jedisCluster = null;
            if (timeOut > 0 && maxAttempts > 0){
                jedisCluster = new JedisCluster(nodes, timeOut, maxAttempts, config);
            }
    
            else{
                jedisCluster = new JedisCluster(nodes);
            }
            return jedisCluster;
        }
    
    }

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