Added sharding using ketama
This commit is contained in:
Jonathan Leibiusky
356
src/main/java/redis/clients/jedis/ShardedJedis.java
Normal file
356
src/main/java/redis/clients/jedis/ShardedJedis.java
Normal file
@@ -0,0 +1,356 @@
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package redis.clients.jedis;
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import java.io.IOException;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import redis.clients.util.ShardInfo;
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import redis.clients.util.Sharded;
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public class ShardedJedis extends Sharded<Jedis> {
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public ShardedJedis(List<ShardInfo> shards) {
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super(shards);
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}
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public String set(String key, String value) {
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Jedis j = getShard(key);
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return j.set(key, value);
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}
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public String get(String key) {
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Jedis j = getShard(key);
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return j.get(key);
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}
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public int exists(String key) {
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Jedis j = getShard(key);
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return j.exists(key);
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}
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public String type(String key) {
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Jedis j = getShard(key);
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return j.type(key);
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}
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public int expire(String key, int seconds) {
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Jedis j = getShard(key);
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return j.expire(key, seconds);
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}
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public int expireAt(String key, long unixTime) {
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Jedis j = getShard(key);
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return j.expireAt(key, unixTime);
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}
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public int ttl(String key) {
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Jedis j = getShard(key);
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return j.ttl(key);
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}
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public String getSet(String key, String value) {
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Jedis j = getShard(key);
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return j.getSet(key, value);
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}
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public int setnx(String key, String value) {
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Jedis j = getShard(key);
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return j.setnx(key, value);
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}
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public String setex(String key, int seconds, String value) {
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Jedis j = getShard(key);
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return j.setex(key, seconds, value);
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}
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public int decrBy(String key, int integer) {
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Jedis j = getShard(key);
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return j.decrBy(key, integer);
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}
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public int decr(String key) {
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Jedis j = getShard(key);
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return j.decr(key);
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}
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public int incrBy(String key, int integer) {
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Jedis j = getShard(key);
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return j.incrBy(key, integer);
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}
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public int incr(String key) {
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Jedis j = getShard(key);
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return j.incr(key);
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}
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public int append(String key, String value) {
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Jedis j = getShard(key);
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return j.append(key, value);
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}
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public String substr(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.substr(key, start, end);
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}
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public int hset(String key, String field, String value) {
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Jedis j = getShard(key);
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return j.hset(key, field, value);
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}
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public String hget(String key, String field) {
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Jedis j = getShard(key);
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return j.hget(key, field);
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}
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public int hsetnx(String key, String field, String value) {
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Jedis j = getShard(key);
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return j.hsetnx(key, field, value);
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}
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public String hmset(String key, Map<String, String> hash) {
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Jedis j = getShard(key);
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return j.hmset(key, hash);
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}
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public List<String> hmget(String key, String... fields) {
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Jedis j = getShard(key);
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return j.hmget(key, fields);
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}
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public int hincrBy(String key, String field, int value) {
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Jedis j = getShard(key);
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return j.hincrBy(key, field, value);
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}
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public int hexists(String key, String field) {
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Jedis j = getShard(key);
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return j.hexists(key, field);
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}
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public int hdel(String key, String field) {
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Jedis j = getShard(key);
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return j.hdel(key, field);
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}
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public int hlen(String key) {
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Jedis j = getShard(key);
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return j.hlen(key);
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}
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public List<String> hkeys(String key) {
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Jedis j = getShard(key);
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return j.hkeys(key);
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}
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public List<String> hvals(String key) {
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Jedis j = getShard(key);
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return j.hvals(key);
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}
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public Map<String, String> hgetAll(String key) {
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Jedis j = getShard(key);
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return j.hgetAll(key);
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}
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public int rpush(String key, String string) {
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Jedis j = getShard(key);
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return j.rpush(key, string);
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}
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public int lpush(String key, String string) {
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Jedis j = getShard(key);
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return j.lpush(key, string);
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}
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public int llen(String key) {
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Jedis j = getShard(key);
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return j.llen(key);
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}
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public List<String> lrange(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.lrange(key, start, end);
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}
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public String ltrim(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.ltrim(key, start, end);
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}
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public String lindex(String key, int index) {
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Jedis j = getShard(key);
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return j.lindex(key, index);
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}
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public String lset(String key, int index, String value) {
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Jedis j = getShard(key);
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return j.lset(key, index, value);
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}
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public int lrem(String key, int count, String value) {
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Jedis j = getShard(key);
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return j.lrem(key, count, value);
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}
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public String lpop(String key) {
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Jedis j = getShard(key);
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return j.lpop(key);
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}
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public String rpop(String key) {
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Jedis j = getShard(key);
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return j.rpop(key);
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}
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public int sadd(String key, String member) {
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Jedis j = getShard(key);
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return j.sadd(key, member);
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}
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public Set<String> smembers(String key) {
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Jedis j = getShard(key);
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return j.smembers(key);
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}
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public int srem(String key, String member) {
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Jedis j = getShard(key);
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return j.srem(key, member);
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}
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public String spop(String key) {
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Jedis j = getShard(key);
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return j.spop(key);
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}
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public int scard(String key) {
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Jedis j = getShard(key);
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return j.scard(key);
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}
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public int sismember(String key, String member) {
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Jedis j = getShard(key);
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return j.sismember(key, member);
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}
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public String srandmember(String key) {
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Jedis j = getShard(key);
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return j.srandmember(key);
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}
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public int zadd(String key, double score, String member) {
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Jedis j = getShard(key);
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return j.zadd(key, score, member);
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}
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public Set<String> zrange(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.zrange(key, start, end);
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}
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public int zrem(String key, String member) {
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Jedis j = getShard(key);
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return j.zrem(key, member);
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}
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public double zincrby(String key, double score, String member) {
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Jedis j = getShard(key);
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return j.zincrby(key, score, member);
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}
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public int zrank(String key, String member) {
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Jedis j = getShard(key);
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return j.zrank(key, member);
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}
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public int zrevrank(String key, String member) {
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Jedis j = getShard(key);
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return j.zrevrank(key, member);
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}
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public Set<String> zrevrange(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.zrevrange(key, start, end);
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}
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public Set<Tuple> zrangeWithScores(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.zrangeWithScores(key, start, end);
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}
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public Set<Tuple> zrevrangeWithScores(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.zrevrangeWithScores(key, start, end);
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}
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public int zcard(String key) {
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Jedis j = getShard(key);
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return j.zcard(key);
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}
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public double zscore(String key, String member) {
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Jedis j = getShard(key);
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return j.zscore(key, member);
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}
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public List<String> sort(String key) {
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Jedis j = getShard(key);
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return j.sort(key);
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}
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public List<String> sort(String key, SortingParams sortingParameters) {
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Jedis j = getShard(key);
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return j.sort(key, sortingParameters);
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}
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public int zcount(String key, double min, double max) {
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Jedis j = getShard(key);
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return j.zcount(key, min, max);
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}
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public Set<String> zrangeByScore(String key, double min, double max) {
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Jedis j = getShard(key);
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return j.zrangeByScore(key, min, max);
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}
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public Set<String> zrangeByScore(String key, double min, double max,
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int offset, int count) {
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Jedis j = getShard(key);
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return j.zrangeByScore(key, min, max, offset, count);
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}
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public Set<Tuple> zrangeByScoreWithScores(String key, double min, double max) {
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Jedis j = getShard(key);
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return j.zrangeByScoreWithScores(key, min, max);
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}
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public Set<Tuple> zrangeByScoreWithScores(String key, double min,
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double max, int offset, int count) {
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Jedis j = getShard(key);
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return j.zrangeByScoreWithScores(key, min, max, offset, count);
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}
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public int zremrangeByRank(String key, int start, int end) {
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Jedis j = getShard(key);
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return j.zremrangeByRank(key, start, end);
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}
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public int zremrangeByScore(String key, double start, double end) {
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Jedis j = getShard(key);
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return j.zremrangeByScore(key, start, end);
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}
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public void disconnect() throws IOException {
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for (Jedis jedis : getAllShards()) {
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jedis.disconnect();
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}
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}
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protected Jedis create(ShardInfo shard) {
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Jedis c = new Jedis(shard.getHost(), shard.getPort());
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if (shard.getPassword() != null) {
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c.auth(shard.getPassword());
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}
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return c;
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}
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}
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98
src/main/java/redis/clients/util/ShardInfo.java
Normal file
98
src/main/java/redis/clients/util/ShardInfo.java
Normal file
@@ -0,0 +1,98 @@
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package redis.clients.util;
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import redis.clients.jedis.Protocol;
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public class ShardInfo {
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@Override
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public String toString() {
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return "ShardInfo [host=" + host + ", port=" + port + ", weight="
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+ weight + "]";
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}
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private String host;
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private int port;
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private int timeout;
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private int weight;
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private String password = null;
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public String getHost() {
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return host;
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}
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public int getPort() {
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return port;
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}
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public int getTimeout() {
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return timeout;
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}
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public ShardInfo(String host) {
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this(host, Protocol.DEFAULT_PORT);
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}
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public ShardInfo(String host, int port) {
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this(host, port, 2000);
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}
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@Override
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public int hashCode() {
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final int prime = 31;
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int result = 1;
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result = prime * result + ((host == null) ? 0 : host.hashCode());
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result = prime * result + port;
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result = prime * result + timeout;
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result = prime * result + weight;
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return result;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (obj == null)
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return false;
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if (getClass() != obj.getClass())
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return false;
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ShardInfo other = (ShardInfo) obj;
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if (host == null) {
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if (other.host != null)
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return false;
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} else if (!host.equals(other.host))
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return false;
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if (port != other.port)
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return false;
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if (timeout != other.timeout)
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return false;
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if (weight != other.weight)
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return false;
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return true;
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}
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public ShardInfo(String host, int port, int timeout) {
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this(host, port, timeout, Sharded.DEFAULT_WEIGHT);
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}
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public ShardInfo(String host, int port, int timeout, int weight) {
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this.host = host;
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this.port = port;
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this.timeout = timeout;
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this.weight = weight;
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}
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public String getPassword() {
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return password;
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}
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public void setPassword(String auth) {
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this.password = auth;
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}
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public void setTimeout(int timeout) {
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this.timeout = timeout;
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}
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public int getWeight() {
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return this.weight;
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}
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}
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102
src/main/java/redis/clients/util/Sharded.java
Normal file
102
src/main/java/redis/clients/util/Sharded.java
Normal file
@@ -0,0 +1,102 @@
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package redis.clients.util;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.TreeMap;
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public abstract class Sharded<T> {
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public static final int DEFAULT_WEIGHT = 1;
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private static MessageDigest md5 = null; // avoid recurring construction
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private TreeMap<Long, ShardInfo> nodes;
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private int totalWeight;
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private Map<ShardInfo, T> resources;
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public Sharded(List<ShardInfo> shards) {
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initialize(shards);
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}
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private void initialize(List<ShardInfo> shards) {
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nodes = new TreeMap<Long, ShardInfo>();
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resources = new HashMap<ShardInfo, T>();
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totalWeight = 0;
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for (ShardInfo shard : shards) {
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totalWeight += shard.getWeight();
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}
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MessageDigest md5;
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try {
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md5 = MessageDigest.getInstance("MD5");
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} catch (NoSuchAlgorithmException e) {
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throw new IllegalStateException("++++ no md5 algorythm found");
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}
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for (ShardInfo shard : shards) {
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double factor = Math
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.floor(((double) (40 * shards.size() * DEFAULT_WEIGHT))
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/ (double) totalWeight);
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||||
|
||||
for (long j = 0; j < factor; j++) {
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byte[] d = md5.digest((shard.toString() + "-" + j).getBytes());
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||||
for (int h = 0; h < 4; h++) {
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||||
Long k = ((long) (d[3 + h * 4] & 0xFF) << 24)
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||||
| ((long) (d[2 + h * 4] & 0xFF) << 16)
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||||
| ((long) (d[1 + h * 4] & 0xFF) << 8)
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||||
| ((long) (d[0 + h * 4] & 0xFF));
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nodes.put(k, shard);
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}
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||||
}
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resources.put(shard, create(shard));
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||||
}
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||||
}
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||||
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||||
public ShardInfo getShardInfo(String key) {
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||||
long hv = calculateHash(key);
|
||||
|
||||
return nodes.get(findPointFor(hv));
|
||||
}
|
||||
|
||||
private Long calculateHash(String key) {
|
||||
if (md5 == null) {
|
||||
try {
|
||||
md5 = MessageDigest.getInstance("MD5");
|
||||
} catch (NoSuchAlgorithmException e) {
|
||||
throw new IllegalStateException("++++ no md5 algorythm found");
|
||||
}
|
||||
}
|
||||
|
||||
md5.reset();
|
||||
md5.update(key.getBytes());
|
||||
byte[] bKey = md5.digest();
|
||||
long res = ((long) (bKey[3] & 0xFF) << 24)
|
||||
| ((long) (bKey[2] & 0xFF) << 16)
|
||||
| ((long) (bKey[1] & 0xFF) << 8) | (long) (bKey[0] & 0xFF);
|
||||
return res;
|
||||
}
|
||||
|
||||
private Long findPointFor(Long hashK) {
|
||||
Long k = nodes.ceilingKey(hashK);
|
||||
|
||||
if (k == null) {
|
||||
k = nodes.firstKey();
|
||||
}
|
||||
|
||||
return k;
|
||||
}
|
||||
|
||||
public T getShard(String key) {
|
||||
ShardInfo shard = getShardInfo(key);
|
||||
return resources.get(shard);
|
||||
}
|
||||
|
||||
protected abstract T create(ShardInfo shard);
|
||||
|
||||
public Collection<T> getAllShards() {
|
||||
return resources.values();
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user