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https://github.com/fluencelabs/redis
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Extended SET command implemented (issue #931).
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140260409e
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@ -116,7 +116,7 @@ struct redisCommand *commandTable;
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*/
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struct redisCommand redisCommandTable[] = {
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{"get",getCommand,2,"r",0,NULL,1,1,1,0,0},
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{"set",setCommand,3,"wm",0,noPreloadGetKeys,1,1,1,0,0},
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{"set",setCommand,-3,"wm",0,noPreloadGetKeys,1,1,1,0,0},
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{"setnx",setnxCommand,3,"wm",0,noPreloadGetKeys,1,1,1,0,0},
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{"setex",setexCommand,4,"wm",0,noPreloadGetKeys,1,1,1,0,0},
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{"psetex",psetexCommand,4,"wm",0,noPreloadGetKeys,1,1,1,0,0},
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@ -42,7 +42,27 @@ static int checkStringLength(redisClient *c, long long size) {
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return REDIS_OK;
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}
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void setGenericCommand(redisClient *c, int nx, robj *key, robj *val, robj *expire, int unit) {
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/* The setGenericCommand() function implements the SET operation with different
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* options and variants. This function is called in order to implement the
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* following commands: SET, SETEX, PSETEX, SETNX.
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*
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* 'flags' changes the behavior of the command (NX or XX, see belove).
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*
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* 'expire' represents an expire to set in form of a Redis object as passed
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* by the user. It is interpreted according to the specified 'unit'.
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*
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* 'ok_reply' and 'abort_reply' is what the function will reply to the client
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* if the operation is performed, or when it is not because of NX or
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* XX flags.
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*
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* If ok_reply is NULL "+OK" is used.
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* If abort_reply is NULL, "$-1" is used. */
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#define REDIS_SET_NO_FLAGS 0
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#define REDIS_SET_NX (1<<0) /* Set if key not exists. */
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#define REDIS_SET_XX (1<<1) /* Set if key exists. */
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void setGenericCommand(redisClient *c, int flags, robj *key, robj *val, robj *expire, int unit, robj *ok_reply, robj *abort_reply) {
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long long milliseconds = 0; /* initialized to avoid any harmness warning */
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if (expire) {
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@ -55,8 +75,10 @@ void setGenericCommand(redisClient *c, int nx, robj *key, robj *val, robj *expir
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if (unit == UNIT_SECONDS) milliseconds *= 1000;
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}
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if (nx && lookupKeyWrite(c->db,key) != NULL) {
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addReply(c,shared.czero);
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if ((flags & REDIS_SET_NX && lookupKeyWrite(c->db,key) != NULL) ||
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(flags & REDIS_SET_XX && lookupKeyWrite(c->db,key) == NULL))
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{
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addReply(c, abort_reply ? abort_reply : shared.nullbulk);
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return;
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}
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setKey(c->db,key,val);
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@ -65,27 +87,55 @@ void setGenericCommand(redisClient *c, int nx, robj *key, robj *val, robj *expir
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notifyKeyspaceEvent(REDIS_NOTIFY_STRING,"set",key,c->db->id);
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if (expire) notifyKeyspaceEvent(REDIS_NOTIFY_GENERIC,
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"expire",key,c->db->id);
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addReply(c, nx ? shared.cone : shared.ok);
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addReply(c, ok_reply ? ok_reply : shared.ok);
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}
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/* SET key value [NX] [XX] [EX <seconds>] [PX <milliseconds>] */
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void setCommand(redisClient *c) {
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int j;
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robj *expire = NULL;
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int unit = UNIT_SECONDS;
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int flags = REDIS_SET_NO_FLAGS;
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for (j = 3; j < c->argc; j++) {
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char *a = c->argv[j]->ptr;
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robj *next = (j == c->argc-1) ? NULL : c->argv[j+1];
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if (a[0] == 'n' && a[1] == 'x' && a[2] == '\0') {
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flags |= REDIS_SET_NX;
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} else if (a[0] == 'x' && a[1] == 'x' && a[2] == '\0') {
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flags |= REDIS_SET_XX;
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} else if (a[0] == 'e' && a[1] == 'x' && a[2] == '\0' && next) {
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unit = UNIT_SECONDS;
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expire = next;
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j++;
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} else if (a[0] == 'p' && a[1] == 'x' && a[2] == '\0' && next) {
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unit = UNIT_MILLISECONDS;
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expire = next;
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j++;
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} else {
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addReply(c,shared.syntaxerr);
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return;
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}
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}
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c->argv[2] = tryObjectEncoding(c->argv[2]);
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setGenericCommand(c,0,c->argv[1],c->argv[2],NULL,0);
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setGenericCommand(c,flags,c->argv[1],c->argv[2],expire,unit,NULL,NULL);
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}
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void setnxCommand(redisClient *c) {
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c->argv[2] = tryObjectEncoding(c->argv[2]);
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setGenericCommand(c,1,c->argv[1],c->argv[2],NULL,0);
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setGenericCommand(c,REDIS_SET_NX,c->argv[1],c->argv[2],NULL,0,shared.cone,shared.czero);
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}
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void setexCommand(redisClient *c) {
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c->argv[3] = tryObjectEncoding(c->argv[3]);
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setGenericCommand(c,0,c->argv[1],c->argv[3],c->argv[2],UNIT_SECONDS);
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setGenericCommand(c,REDIS_SET_NO_FLAGS,c->argv[1],c->argv[3],c->argv[2],UNIT_SECONDS,NULL,NULL);
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}
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void psetexCommand(redisClient *c) {
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c->argv[3] = tryObjectEncoding(c->argv[3]);
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setGenericCommand(c,0,c->argv[1],c->argv[3],c->argv[2],UNIT_MILLISECONDS);
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setGenericCommand(c,REDIS_SET_NO_FLAGS,c->argv[1],c->argv[3],c->argv[2],UNIT_MILLISECONDS,NULL,NULL);
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}
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int getGenericCommand(redisClient *c) {
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