java(JedisCluster)操作redis集群
这里只是几个简单的demo,直接上代码吧,没啥好说的
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;import org.junit.After;import org.junit.Before;import org.junit.Test;import redis.clients.jedis.*;import java.io.IOException;import java.util.*;import java.util.concurrent.*;import java.util.concurrent.atomic.AtomicInteger;/** * Created by liubenlong on 2016/12/20. */public class RedisTest { JedisCluster jedisCluster = null; static String prefix = "luffi:lbl"; static String KEY_SPLIT = ":"; String nameKey = prefix + KEY_SPLIT + "name"; /** * 因为是测试,这里没有写单例 */ @Before public void before(){ String[] serverArray = "redis集群地址".split(","); Set<HostAndPort> nodes = new HashSet<>(); for (String ipPort : serverArray) { String[] ipPortPair = ipPort.split(":"); nodes.add(new HostAndPort(ipPortPair[0].trim(), Integer.valueOf(ipPortPair[1].trim()))); } jedisCluster = new JedisCluster(nodes, 1000, 1000, 1, "redis集群密码", new GenericObjectPoolConfig()); jedisCluster.del(nameKey); } /** * 发布 */ @Test public void publish(){ System.out.println(jedisCluster.publish("channel1", "ss")); } /** * 订阅 */ @Test public void psubscribe(){ jedisCluster.subscribe(new JedisPubSubListener(), "channel1"); } /** * 简单字符串读写 */ @Test public void setStringData(){ System.out.println(jedisCluster.set(nameKey, "张三")); System.out.println(jedisCluster.get(nameKey)); } /** * setnx : 如果key存在,返回0,如果不存在,则设置成功。 * setnx的意思是set if not exist. */ @Test public void setnxTest(){ System.out.println(jedisCluster.setnx(nameKey, "张三")); System.out.println(jedisCluster.get(nameKey)); System.out.println(jedisCluster.setnx(nameKey, "张三")); System.out.println(jedisCluster.get(nameKey)); } /** * 简单字符串读写,带过期时间 */ @Test public void setexTest() throws InterruptedException { System.out.println(jedisCluster.setex(nameKey, 3, "张三")); for(int i = 0 ; i < 5 ; i ++){ System.out.println(jedisCluster.get(nameKey)); Thread.sleep(1000); } } /** * 操作子字符串 */ @Test public void setrangeTest() throws InterruptedException { System.out.println(jedisCluster.set(nameKey, "852026881@qq.com")); System.out.println(jedisCluster.get(nameKey)); System.out.println(jedisCluster.setrange(nameKey, 8, "abc")); System.out.println(jedisCluster.get(nameKey)); System.out.println(jedisCluster.setrange(nameKey, 8, "abcdefghhhhhh")); System.out.println(jedisCluster.get(nameKey)); System.out.println(jedisCluster.getrange(nameKey, 2, 5)); } /** * 批量操作key * keySlot算法中,如果key包含{},就会使用第一个{}内部的字符串作为hash key,这样就可以保证拥有同样{}内部字符串的key就会拥有相同slot。 * 参考 http://brandnewuser.iteye.com/blog/2314280 * redis.clients.util.JedisClusterCRC16#getSlot(java.lang.String) * * 注意:这样的话,本来可以hash到不同的slot中的数据都放到了同一个slot中,所以使用的时候要注意数据不要太多导致一个slot数据量过大,数据分布不均匀! * * MSET 是一个原子性(atomic)操作,所有给定 key 都会在同一时间内被设置,某些给定 key 被更新而另一些给定 key 没有改变的情况,不可能发生。 */ @Test public void msetTest() throws InterruptedException { /** * jedisCluster.mset("sf","d","aadf","as"); * 直接这样写,会报错:redis.clients.jedis.exceptions.JedisClusterException: No way to dispatch this command to Redis Cluster because keys have different slots. * 这是因为key不在同一个slot中 */ String result = jedisCluster.mset("{" + prefix + KEY_SPLIT + "}" + "name", "张三", "{" + prefix + KEY_SPLIT + "}" + "age", "23", "{" + prefix + KEY_SPLIT + "}" + "address", "adfsa", "{" + prefix + KEY_SPLIT + "}" + "score", "100"); System.out.println(result); String name = jedisCluster.get("{" + prefix + KEY_SPLIT + "}" + "name"); System.out.println(name); Long del = jedisCluster.del("{" + prefix + KEY_SPLIT + "}" + "age"); System.out.println(del); List<String> values = jedisCluster.mget("{" + prefix + KEY_SPLIT + "}" + "name", "{" + prefix + KEY_SPLIT + "}" + "age", "{" + prefix + KEY_SPLIT + "}" + "address"); System.out.println(values); } /** * MSETNX 命令:它只会在所有给定 key 都不存在的情况下进行设置操作。 * http://doc.redisfans.com/string/mset.html */ @Test public void msetnxTest() throws InterruptedException { Long msetnx = jedisCluster.msetnx( "{" + prefix + KEY_SPLIT + "}" + "name", "张三", "{" + prefix + KEY_SPLIT + "}" + "age", "23", "{" + prefix + KEY_SPLIT + "}" + "address", "adfsa", "{" + prefix + KEY_SPLIT + "}" + "score", "100"); System.out.println(msetnx); System.out.println(jedisCluster.mget( "{" + prefix + KEY_SPLIT + "}" + "name", "{" + prefix + KEY_SPLIT + "}" + "age", "{" + prefix + KEY_SPLIT + "}" + "address", "{" + prefix + KEY_SPLIT + "}" + "score")); msetnx = jedisCluster.msetnx( "{" + prefix + KEY_SPLIT + "}" + "phone", "110", "{" + prefix + KEY_SPLIT + "}" + "name", "张三", "{" + prefix + KEY_SPLIT + "}" + "abc", "asdfasfdsa"); System.out.println(msetnx); System.out.println(jedisCluster.mget( "{" + prefix + KEY_SPLIT + "}" + "name", "{" + prefix + KEY_SPLIT + "}" + "age", "{" + prefix + KEY_SPLIT + "}" + "address", "{" + prefix + KEY_SPLIT + "}" + "score", "{" + prefix + KEY_SPLIT + "}" + "phone", "{" + prefix + KEY_SPLIT + "}" + "abc")); } /** * getset:设置key值,并返回旧值 */ @Test public void getsetTest() throws InterruptedException { System.out.println(jedisCluster.set(nameKey, "zhangsan")); System.out.println(jedisCluster.get(nameKey)); System.out.println(jedisCluster.getSet(nameKey, "lisi")); System.out.println(jedisCluster.get(nameKey)); } /** * append: 追加. 其返回值是追加后数据的长度 */ @Test public void appendTest() throws InterruptedException { System.out.println(jedisCluster.append(nameKey, "aa")); System.out.println(jedisCluster.get(nameKey)); System.out.println(jedisCluster.append(nameKey, "lisi")); System.out.println(jedisCluster.get(nameKey)); } /** * incrf: * 将 key 中储存的数字值增一。 如果 key 不存在,那么 key 的值会先被初始化为 0 ,然后再执行 INCR 操作。 如果值包含错误的类型,或字符串类型的值不能表示为数字,那么返回一个错误。 本操作的值限制在 64 位(bit)有符号数字表示之内。 这是一个针对字符串的操作,因为 Redis 没有专用的整数类型,所以 key 内储存的字符串被解释为十进制 64 位有符号整数来执行 INCR 操作。 返回值: 执行 INCR 命令之后 key 的值。 这里有问题,最终数据结果大于10000 后续在研究 TODO 这是因为设置的超时时间太小了,他去重试了,所以最终结果大于10000 */ @Test public void incrTest() throws InterruptedException { /** * 测试线程安全 */ jedisCluster.del("incrNum"); final AtomicInteger atomicInteger = new AtomicInteger(0); final CountDownLatch countDownLatch = new CountDownLatch(10); ExecutorService executorService = Executors.newFixedThreadPool(10); for(int i = 0 ; i < 10 ; i ++){ executorService.submit(new Runnable() { @Override public void run() { for(int j = 0 ; j < 1000 ; j ++){ atomicInteger.incrementAndGet(); jedisCluster.incr("incrNum"); } countDownLatch.countDown(); } }); } countDownLatch.await(); System.out.println(jedisCluster.get("incrNum")); System.out.println(atomicInteger); } /** * * @throws InterruptedException */ @Test public void hashTest() throws InterruptedException { String hashKey = "hashKey"; jedisCluster.del(hashKey); System.out.println(jedisCluster.hset(hashKey, "program_zhangsan", "111")); System.out.println(jedisCluster.hexists(hashKey, "program_zhangsan")); System.out.println(jedisCluster.hset(hashKey, "program_zhangsan", "222")); System.out.println(jedisCluster.hset(hashKey, "program_wangwu", "333")); System.out.println(jedisCluster.hset(hashKey, "program_lisi", "444")); System.out.println("hkeys:" + jedisCluster.hkeys(hashKey)); System.out.println(jedisCluster.hgetAll(hashKey)); System.out.println(jedisCluster.hincrBy(hashKey, "program_zhangsan", 2)); System.out.println(jedisCluster.hmget(hashKey, "program_zhangsan", "program_lisi")); jedisCluster.hdel(hashKey, "program_wangwu"); System.out.println(jedisCluster.hgetAll(hashKey)); System.out.println("hsetnx:" + jedisCluster.hsetnx(hashKey, "program_lisi", "666")); System.out.println("hvals:" + jedisCluster.hvals(hashKey)); System.out.println("expire:" + jedisCluster.expire(hashKey, 3)); for(int i = 0 ; i < 5 ; i ++){ System.out.println(jedisCluster.hgetAll(hashKey)); Thread.sleep(1000); } } /** * 模拟先进先出队列 * 生产者 消费者 */ @Test public void queue() throws InterruptedException { String key = prefix + KEY_SPLIT + "queue"; jedisCluster.del(key); System.out.println(jedisCluster.lpush(key, "1", "2", "3")); System.out.println(jedisCluster.lpush(key, "4")); System.out.println(jedisCluster.lpush(key, "5")); System.out.println("lrange:" + jedisCluster.lrange(key, 0, -1)); System.out.println("lindex[2]:" + jedisCluster.lindex(key, 2)); System.out.println("linsert:" + jedisCluster.linsert(key, Client.LIST_POSITION.BEFORE, "3", "100")); System.out.println("lrange:" + jedisCluster.lrange(key, 0, -1)); for(int i = 0 ; i< 6 ; i ++){ System.out.println(jedisCluster.rpop(key)); } } /** * Set集合 */ @Test public void setTest() throws InterruptedException { String keyA = "{" + prefix + KEY_SPLIT + "set}a"; String keyB = "{" + prefix + KEY_SPLIT + "set}b"; jedisCluster.del(keyA); jedisCluster.del(keyB); System.out.println(jedisCluster.sadd(keyA, "a", "b", "c")); System.out.println(jedisCluster.sadd(keyA, "a")); System.out.println(jedisCluster.sadd(keyA, "d")); System.out.println(jedisCluster.smembers(keyA)); System.out.println(jedisCluster.scard(keyA)); System.out.println("c是否在集合A中:" + jedisCluster.sismember(keyA, "c")); System.out.println(jedisCluster.srandmember(keyA)); System.out.println(jedisCluster.spop(keyA)); System.out.println(jedisCluster.smembers(keyA)); System.out.println("---------"); System.out.println(jedisCluster.smove(keyA, keyB, "a")); System.out.println("keyA: "+jedisCluster.smembers(keyA)); System.out.println("keyB: "+jedisCluster.smembers(keyB)); System.out.println(jedisCluster.sadd(keyB, "a", "f", "c")); System.out.println(jedisCluster.sdiff(keyA, keyB)); System.out.println(jedisCluster.sinter(keyA, keyB)); System.out.println(jedisCluster.sunion(keyA, keyB)); } /** * sortedSet集合 */ @Test public void sortedSetTest() throws InterruptedException { String keyA = "{"+prefix + KEY_SPLIT + "sortedSet}a"; String keyB = "{"+prefix + KEY_SPLIT + "sortedSet}b"; String keyC = "{"+prefix + KEY_SPLIT + "sortedSet}c"; jedisCluster.del(keyA); jedisCluster.del(keyB); System.out.println(jedisCluster.zadd(keyA, 10, "aa")); Map<String, Double> map = new HashMap<>(); map.put("b", 8.0); map.put("c", 4.0); map.put("d", 6.0); System.out.println(jedisCluster.zadd(keyA, map)); System.out.println(jedisCluster.zcard(keyA)); System.out.println(jedisCluster.zcount(keyA, 3, 8)); System.out.println("zrange: "+jedisCluster.zrange(keyA, 0, -1)); System.out.println("zrevrange: "+jedisCluster.zrevrange(keyA, 0, -1)); System.out.println("zrangeWithScores: "+jedisCluster.zrangeWithScores(keyA, 0, -1)); System.out.println("zscore: "+jedisCluster.zscore(keyA, "aa")); System.out.println("zrangeByScore: "+jedisCluster.zrangeByScore(keyA, 3, 8)); System.out.println("zrank: "+jedisCluster.zrank(keyA, "c")); System.out.println("zrevrank: "+jedisCluster.zrevrank(keyA, "c")); System.out.println("zrem: "+jedisCluster.zrem(keyA, "c", "a")); System.out.println("zrange: "+jedisCluster.zrange(keyA, 0, -1)); System.out.println("zremrangeByRank: "+jedisCluster.zremrangeByRank(keyA, 1, 2)); System.out.println("zrange: "+jedisCluster.zrange(keyA, 0, -1)); System.out.println("zremrangeByScore: "+jedisCluster.zremrangeByScore(keyA, 1, 3)); System.out.println("zrange: "+jedisCluster.zrange(keyA, 0, -1)); System.out.println("-------"); System.out.println(jedisCluster.zadd(keyB, map)); System.out.println("zrange: "+jedisCluster.zrange(keyB, 0, -1)); System.out.println("zunionstore: "+jedisCluster.zunionstore(keyC, keyA, keyB)); System.out.println("zrange: "+jedisCluster.zrange(keyC, 0, -1)); System.out.println("zinterstore: "+jedisCluster.zinterstore(keyC, keyA, keyB)); System.out.println("zrange: "+jedisCluster.zrange(keyC, 0, -1)); } /** * 列表 排序 */ @Test public void sort() throws InterruptedException { String key = prefix + KEY_SPLIT + "queue"; jedisCluster.del(key); System.out.println(jedisCluster.lpush(key, "1", "5", "3", "20", "6")); System.out.println(jedisCluster.lrange(key, 0, -1)); System.out.println(jedisCluster.sort(key)); System.out.println(jedisCluster.lrange(key, 0, -1)); } /** * lua脚本 */ @Test public void script() throws InterruptedException { Object eval = jedisCluster.eval("return {KEYS[1],ARGV[1],ARGV[2]}", 1, "lua", "key1", "dd"); System.out.println(eval); System.out.println(jedisCluster.eval("return redis.call('set', KEYS[1], ARGV[1])", 1, "luaTest", "cv")); System.out.println(jedisCluster.get("luaTest")); String scriptLoad = jedisCluster.scriptLoad("return redis.call('get', KEYS[1])", "luaTest"); System.out.println(scriptLoad); System.out.println(jedisCluster.scriptExists(scriptLoad, "luaTest")); System.out.println(jedisCluster.evalsha(scriptLoad, 1, "luaTest")); System.out.println(jedisCluster.scriptFlush("luaTest".getBytes())); System.out.println(jedisCluster.scriptExists(scriptLoad, "luaTest")); System.out.println(jedisCluster.evalsha(scriptLoad, 1, "luaTest")); } /** * redis中的lua脚本做了很多限制,防止随机性的发生。比如lua脚本中返回的总是有序的集合。 * 详情见 http://doc.redisfans.com/script/eval.html - 纯函数脚本 */ @Test public void scriptFuc() throws InterruptedException { String key = "luaTest"; System.out.println(jedisCluster.del(key)); System.out.println(jedisCluster.sadd(key, "10","3","7","40","6")); System.out.println(jedisCluster.smembers(key)); System.out.println(jedisCluster.eval("return redis.call('smembers', KEYS[1])", 1, key)); } /** * 使用lua脚本记录日志 * @throws InterruptedException */ @Test public void redisLog() throws InterruptedException { System.out.println(jedisCluster.eval("redis.log(redis.LOG_WARNING, 'Something is wrong with this script.')", 1, "afd")); } /** * 模拟先进先出 定长 队列 * 参考 http://www.cnblogs.com/stephen-liu74/archive/2012/02/14/2351859.html * https://www.v2ex.com/t/65663 */ @Test public void queue1() throws InterruptedException { String key = prefix + KEY_SPLIT + "queue"; Long del = jedisCluster.del(key); System.out.println(del); int length = 5; System.out.println(jedisCluster.lpush(key, "1", "2", "3", "4", "5", "6", "7")); List<String> list = jedisCluster.lrange(key, 0, -1); System.out.println(list); Long llen = jedisCluster.llen(key); System.out.println("目前队列长度:" + llen); /** * 该命令将仅保留指定范围内的元素 * 每次lpush以后,就用ltrim进行截取,已达到定长队列(或定长list)的目的 * * 注意: * 这里根据实际业务需求,超长了不一定截取丢掉,也可以进行分流限流报警处理或者其他阻塞操作 */ System.out.println(jedisCluster.ltrim(key, 0, length - 1)); System.out.println(jedisCluster.lrange(key, 0, -1)); } /** * 分布式互斥锁 * 一般是通过 set nx ex 实现的 * 但是这样不完美,具体参考 http://ifeve.com/redis-lock/ */ @Test public void lock() throws InterruptedException{ String key = prefix + KEY_SPLIT + "lock"; /** * 复合命令: SET KEY VALUE [EX seconds] [PX milliseconds] [NX|XX] */ System.out.println(jedisCluster.set(key, "本机ID", "nx", "ex", 3)); for (int i = 0 ; i < 6 ; i ++) { System.out.println(jedisCluster.get(key)); Thread.sleep(1000); } } @After public void after(){ try { if(jedisCluster != null) jedisCluster.close(); } catch (IOException e) { e.printStackTrace(); } }}
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JedisPubSubListener .java
import redis.clients.jedis.JedisPubSub;public class JedisPubSubListener extends JedisPubSub { public void onMessage(String channel, String message) { System.out.println(channel + "=" + message); } public void onSubscribe(String channel, int subscribedChannels) { System.out.println(channel + "=" + subscribedChannels); } public void onUnsubscribe(String channel, int subscribedChannels) { System.out.println(channel + "=" + subscribedChannels); } public void onPSubscribe(String pattern, int subscribedChannels) { System.out.println(pattern + "=" + subscribedChannels); } public void onPUnsubscribe(String pattern, int subscribedChannels) { System.out.println(pattern + "=" + subscribedChannels); } public void onPMessage(String pattern, String channel, String message) { System.out.println(pattern + "=" + channel + "=" + message); } }