package redis.clients.jedis;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import redis.clients.jedis.exceptions.JedisAskDataException;
import redis.clients.jedis.exceptions.JedisClusterException;
import redis.clients.jedis.exceptions.JedisConnectionException;
import redis.clients.jedis.exceptions.JedisDataException;
import redis.clients.jedis.exceptions.JedisMovedDataException;
import redis.clients.util.RedisInputStream;
import redis.clients.util.RedisOutputStream;
import redis.clients.util.SafeEncoder;
public final class Protocol {
private static final String ASK_RESPONSE = "ASK";
private static final String MOVED_RESPONSE = "MOVED";
private static final String CLUSTERDOWN_RESPONSE = "CLUSTERDOWN";
public static final String DEFAULT_HOST = "localhost";
public static final int DEFAULT_PORT = 6379;
public static final int DEFAULT_SENTINEL_PORT = 26379;
public static final int DEFAULT_TIMEOUT = 2000;
public static final int DEFAULT_DATABASE = 0;
public static final String CHARSET = "UTF-8";
public static final byte DOLLAR_BYTE = '$';
public static final byte ASTERISK_BYTE = '*';
public static final byte PLUS_BYTE = '+';
public static final byte MINUS_BYTE = '-';
public static final byte COLON_BYTE = ':';
public static final String SENTINEL_MASTERS = "masters";
public static final String SENTINEL_GET_MASTER_ADDR_BY_NAME = "get-master-addr-by-name";
public static final String SENTINEL_RESET = "reset";
public static final String SENTINEL_SLAVES = "slaves";
public static final String SENTINEL_FAILOVER = "failover";
public static final String SENTINEL_MONITOR = "monitor";
public static final String SENTINEL_REMOVE = "remove";
public static final String SENTINEL_SET = "set";
public static final String CLUSTER_NODES = "nodes";
public static final String CLUSTER_MEET = "meet";
public static final String CLUSTER_RESET = "reset";
public static final String CLUSTER_ADDSLOTS = "addslots";
public static final String CLUSTER_DELSLOTS = "delslots";
public static final String CLUSTER_INFO = "info";
public static final String CLUSTER_GETKEYSINSLOT = "getkeysinslot";
public static final String CLUSTER_SETSLOT = "setslot";
public static final String CLUSTER_SETSLOT_NODE = "node";
public static final String CLUSTER_SETSLOT_MIGRATING = "migrating";
public static final String CLUSTER_SETSLOT_IMPORTING = "importing";
public static final String CLUSTER_SETSLOT_STABLE = "stable";
public static final String CLUSTER_FORGET = "forget";
public static final String CLUSTER_FLUSHSLOT = "flushslots";
public static final String CLUSTER_KEYSLOT = "keyslot";
public static final String CLUSTER_COUNTKEYINSLOT = "countkeysinslot";
public static final String CLUSTER_SAVECONFIG = "saveconfig";
public static final String CLUSTER_REPLICATE = "replicate";
public static final String CLUSTER_SLAVES = "slaves";
public static final String CLUSTER_FAILOVER = "failover";
public static final String CLUSTER_SLOTS = "slots";
public static final String PUBSUB_CHANNELS = "channels";
public static final String PUBSUB_NUMSUB = "numsub";
public static final String PUBSUB_NUM_PAT = "numpat";
private Protocol() {
// this prevent the class from instantiation
}
public static void sendCommand(final RedisOutputStream os,
final Command command, final byte[]... args) {
sendCommand(os, command.raw, args);
}
private static void sendCommand(final RedisOutputStream os,
final byte[] command, final byte[]... args) {
try {
os.write(ASTERISK_BYTE);
os.writeIntCrLf(args.length + 1);
os.write(DOLLAR_BYTE);
os.writeIntCrLf(command.length);
os.write(command);
os.writeCrLf();
for (final byte[] arg : args) {
os.write(DOLLAR_BYTE);
os.writeIntCrLf(arg.length);
os.write(arg);
os.writeCrLf();
}
} catch (IOException e) {
throw new JedisConnectionException(e);
}
}
private static void processError(final RedisInputStream is) {
String message = is.readLine();
// TODO: I'm not sure if this is the best way to do this.
// Maybe Read only first 5 bytes instead?
if (message.startsWith(MOVED_RESPONSE)) {
String[] movedInfo = parseTargetHostAndSlot(message);
throw new JedisMovedDataException(message, new HostAndPort(
movedInfo[1], Integer.valueOf(movedInfo[2])),
Integer.valueOf(movedInfo[0]));
} else if (message.startsWith(ASK_RESPONSE)) {
String[] askInfo = parseTargetHostAndSlot(message);
throw new JedisAskDataException(message, new HostAndPort(
askInfo[1], Integer.valueOf(askInfo[2])),
Integer.valueOf(askInfo[0]));
} else if (message.startsWith(CLUSTERDOWN_RESPONSE)) {
throw new JedisClusterException(message);
}
throw new JedisDataException(message);
}
private static String[] parseTargetHostAndSlot(
String clusterRedirectResponse) {
String[] response = new String[3];
String[] messageInfo = clusterRedirectResponse.split(" ");
String[] targetHostAndPort = messageInfo[2].split(":");
response[0] = messageInfo[1];
response[1] = targetHostAndPort[0];
response[2] = targetHostAndPort[1];
return response;
}
private static Object process(final RedisInputStream is) {
try {
byte b = is.readByte();
if (b == MINUS_BYTE) {
processError(is);
} else if (b == ASTERISK_BYTE) {
return processMultiBulkReply(is);
} else if (b == COLON_BYTE) {
return processInteger(is);
} else if (b == DOLLAR_BYTE) {
return processBulkReply(is);
} else if (b == PLUS_BYTE) {
return processStatusCodeReply(is);
} else {
throw new JedisConnectionException("Unknown reply: " + (char) b);
}
} catch (IOException e) {
throw new JedisConnectionException(e);
}
return null;
}
private static byte[] processStatusCodeReply(final RedisInputStream is) {
return SafeEncoder.encode(is.readLine());
}
private static byte[] processBulkReply(final RedisInputStream is) {
int len = Integer.parseInt(is.readLine());
if (len == -1) {
return null;
}
byte[] read = new byte[len];
int offset = 0;
try {
while (offset < len) {
int size = is.read(read, offset, (len - offset));
if (size == -1)
throw new JedisConnectionException(
"It seems like server has closed the connection.");
offset += size;
}
// read 2 more bytes for the command delimiter
is.readByte();
is.readByte();
} catch (IOException e) {
throw new JedisConnectionException(e);
}
return read;
}
private static Long processInteger(final RedisInputStream is) {
String num = is.readLine();
return Long.valueOf(num);
}
private static List<Object> processMultiBulkReply(final RedisInputStream is) {
int num = Integer.parseInt(is.readLine());
if (num == -1) {
return null;
}
List<Object> ret = new ArrayList<Object>(num);
for (int i = 0; i < num; i++) {
try {
ret.add(process(is));
} catch (JedisDataException e) {
ret.add(e);
}
}
return ret;
}
public static Object read(final RedisInputStream is) {
return process(is);
}
public static final byte[] toByteArray(final boolean value) {
return toByteArray(value ? 1 : 0);
}
public static final byte[] toByteArray(final int value) {
return SafeEncoder.encode(String.valueOf(value));
}
public static final byte[] toByteArray(final long value) {
return SafeEncoder.encode(String.valueOf(value));
}
public static final byte[] toByteArray(final double value) {
return SafeEncoder.encode(String.valueOf(value));
}
public static enum Command {
PING, SET, GET, QUIT, EXISTS, DEL, TYPE, FLUSHDB, KEYS, RANDOMKEY, RENAME, RENAMENX, RENAMEX, DBSIZE, EXPIRE, EXPIREAT, TTL, SELECT, MOVE, FLUSHALL, GETSET, MGET, SETNX, SETEX, MSET, MSETNX, DECRBY, DECR, INCRBY, INCR, APPEND, SUBSTR, HSET, HGET, HSETNX, HMSET, HMGET, HINCRBY, HEXISTS, HDEL, HLEN, HKEYS, HVALS, HGETALL, RPUSH, LPUSH, LLEN, LRANGE, LTRIM, LINDEX, LSET, LREM, LPOP, RPOP, RPOPLPUSH, SADD, SMEMBERS, SREM, SPOP, SMOVE, SCARD, SISMEMBER, SINTER, SINTERSTORE, SUNION, SUNIONSTORE, SDIFF, SDIFFSTORE, SRANDMEMBER, ZADD, ZRANGE, ZREM, ZINCRBY, ZRANK, ZREVRANK, ZREVRANGE, ZCARD, ZSCORE, MULTI, DISCARD, EXEC, WATCH, UNWATCH, SORT, BLPOP, BRPOP, AUTH, SUBSCRIBE, PUBLISH, UNSUBSCRIBE, PSUBSCRIBE, PUNSUBSCRIBE, PUBSUB, ZCOUNT, ZRANGEBYSCORE, ZREVRANGEBYSCORE, ZREMRANGEBYRANK, ZREMRANGEBYSCORE, ZUNIONSTORE, ZINTERSTORE, ZLEXCOUNT, ZRANGEBYLEX, ZREVRANGEBYLEX, ZREMRANGEBYLEX, SAVE, BGSAVE, BGREWRITEAOF, LASTSAVE, SHUTDOWN, INFO, MONITOR, SLAVEOF, CONFIG, STRLEN, SYNC, LPUSHX, PERSIST, RPUSHX, ECHO, LINSERT, DEBUG, BRPOPLPUSH, SETBIT, GETBIT, BITPOS, SETRANGE, GETRANGE, EVAL, EVALSHA, SCRIPT, SLOWLOG, OBJECT, BITCOUNT, BITOP, SENTINEL, DUMP, RESTORE, PEXPIRE, PEXPIREAT, PTTL, INCRBYFLOAT, PSETEX, CLIENT, TIME, MIGRATE, HINCRBYFLOAT, SCAN, HSCAN, SSCAN, ZSCAN, WAIT, CLUSTER, ASKING, PFADD, PFCOUNT, PFMERGE;
public final byte[] raw;
Command() {
raw = SafeEncoder.encode(this.name());
}
}
public static enum Keyword {
AGGREGATE, ALPHA, ASC, BY, DESC, GET, LIMIT, MESSAGE, NO, NOSORT, PMESSAGE, PSUBSCRIBE, PUNSUBSCRIBE, OK, ONE, QUEUED, SET, STORE, SUBSCRIBE, UNSUBSCRIBE, WEIGHTS, WITHSCORES, RESETSTAT, RESET, FLUSH, EXISTS, LOAD, KILL, LEN, REFCOUNT, ENCODING, IDLETIME, AND, OR, XOR, NOT, GETNAME, SETNAME, LIST, MATCH, COUNT;
public final byte[] raw;
Keyword() {
raw = SafeEncoder.encode(this.name().toLowerCase());
}
}
}