}
robj *lookupKeyWrite(redisDb *db, robj *key) {
- deleteIfVolatile(db,key);
- touchWatchedKey(db,key);
+ expireIfNeeded(db,key);
return lookupKey(db,key);
}
sds pattern = c->argv[1]->ptr;
int plen = sdslen(pattern);
unsigned long numkeys = 0;
- robj *lenobj = createObject(REDIS_STRING,NULL);
+ void *replylen = addDeferredMultiBulkLength(c);
di = dictGetIterator(c->db->dict);
- addReply(c,lenobj);
- decrRefCount(lenobj);
while((de = dictNext(di)) != NULL) {
sds key = dictGetEntryKey(de);
robj *keyobj;
}
}
dictReleaseIterator(di);
- lenobj->ptr = sdscatprintf(sdsempty(),"*%lu\r\n",numkeys);
+ setDeferredMultiBulkLength(c,replylen,numkeys);
}
void dbsizeCommand(redisClient *c) {
- addReplySds(c,
- sdscatprintf(sdsempty(),":%lu\r\n",dictSize(c->db->dict)));
+ addReplyLongLong(c,dictSize(c->db->dict));
}
void lastsaveCommand(redisClient *c) {
- addReplySds(c,
- sdscatprintf(sdsempty(),":%lu\r\n",server.lastsave));
+ addReplyLongLong(c,server.lastsave);
}
void typeCommand(redisClient *c) {
return;
incrRefCount(o);
- deleteIfVolatile(c->db,c->argv[2]);
if (dbAdd(c->db,c->argv[2],o) == REDIS_ERR) {
if (nx) {
decrRefCount(o);
dbReplace(c->db,c->argv[2],o);
}
dbDelete(c->db,c->argv[1]);
+ touchWatchedKey(c->db,c->argv[1]);
touchWatchedKey(c->db,c->argv[2]);
server.dirty++;
addReply(c,nx ? shared.cone : shared.ok);
}
/* Try to add the element to the target DB */
- deleteIfVolatile(dst,c->argv[1]);
if (dbAdd(dst,c->argv[1],o) == REDIS_ERR) {
addReply(c,shared.czero);
return;
/* An expire may only be removed if there is a corresponding entry in the
* main dict. Otherwise, the key will never be freed. */
redisAssert(dictFind(db->dict,key->ptr) != NULL);
- if (dictDelete(db->expires,key->ptr) == DICT_OK) {
- return 1;
- } else {
- return 0;
- }
+ return dictDelete(db->expires,key->ptr) == DICT_OK;
}
-int setExpire(redisDb *db, robj *key, time_t when) {
+void setExpire(redisDb *db, robj *key, time_t when) {
dictEntry *de;
/* Reuse the sds from the main dict in the expire dict */
- redisAssert((de = dictFind(db->dict,key->ptr)) != NULL);
- if (dictAdd(db->expires,dictGetEntryKey(de),(void*)when) == DICT_ERR) {
- return 0;
- } else {
- return 1;
- }
+ de = dictFind(db->dict,key->ptr);
+ redisAssert(de != NULL);
+ dictReplace(db->expires,dictGetEntryKey(de),(void*)when);
}
/* Return the expire time of the specified key, or -1 if no expire
return (time_t) dictGetEntryVal(de);
}
+/* Propagate expires into slaves and the AOF file.
+ * When a key expires in the master, a DEL operation for this key is sent
+ * to all the slaves and the AOF file if enabled.
+ *
+ * This way the key expiry is centralized in one place, and since both
+ * AOF and the master->slave link guarantee operation ordering, everything
+ * will be consistent even if we allow write operations against expiring
+ * keys. */
+void propagateExpire(redisDb *db, robj *key) {
+ struct redisCommand *cmd;
+ robj *argv[2];
+
+ cmd = lookupCommand("del");
+ argv[0] = createStringObject("DEL",3);
+ argv[1] = key;
+ incrRefCount(key);
+
+ if (server.appendonly)
+ feedAppendOnlyFile(cmd,db->id,argv,2);
+ if (listLength(server.slaves))
+ replicationFeedSlaves(server.slaves,db->id,argv,2);
+
+ decrRefCount(argv[0]);
+ decrRefCount(argv[1]);
+}
+
int expireIfNeeded(redisDb *db, robj *key) {
time_t when = getExpire(db,key);
+
+ /* If we are running in the context of a slave, return ASAP:
+ * the slave key expiration is controlled by the master that will
+ * send us synthesized DEL operations for expired keys.
+ *
+ * Still we try to return the right information to the caller,
+ * that is, 0 if we think the key should be still valid, 1 if
+ * we think the key is expired at this time. */
+ if (server.masterhost != NULL) {
+ return time(NULL) > when;
+ }
+
if (when < 0) return 0;
/* Return when this key has not expired */
/* Delete the key */
server.stat_expiredkeys++;
server.dirty++;
- return dbDelete(db,key);
-}
-
-int deleteIfVolatile(redisDb *db, robj *key) {
- if (getExpire(db,key) < 0) return 0;
-
- /* Delete the key */
- server.stat_expiredkeys++;
- server.dirty++;
+ propagateExpire(db,key);
return dbDelete(db,key);
}
if (seconds <= 0) {
if (dbDelete(c->db,key)) server.dirty++;
addReply(c, shared.cone);
+ touchWatchedKey(c->db,key);
return;
} else {
time_t when = time(NULL)+seconds;
- if (setExpire(c->db,key,when)) {
- addReply(c,shared.cone);
- server.dirty++;
- } else {
- addReply(c,shared.czero);
- }
+ setExpire(c->db,key,when);
+ addReply(c,shared.cone);
+ touchWatchedKey(c->db,key);
+ server.dirty++;
return;
}
}
}
void ttlCommand(redisClient *c) {
- time_t expire;
- int ttl = -1;
+ time_t expire, ttl = -1;
expire = getExpire(c->db,c->argv[1]);
if (expire != -1) {
- ttl = (int) (expire-time(NULL));
+ ttl = (expire-time(NULL));
if (ttl < 0) ttl = -1;
}
- addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",ttl));
+ addReplyLongLong(c,(long long)ttl);
}
+void persistCommand(redisClient *c) {
+ dictEntry *de;
+ de = dictFind(c->db->dict,c->argv[1]->ptr);
+ if (de == NULL) {
+ addReply(c,shared.czero);
+ } else {
+ if (removeExpire(c->db,c->argv[1])) {
+ addReply(c,shared.cone);
+ server.dirty++;
+ } else {
+ addReply(c,shared.czero);
+ }
+ }
+}
projects / redis.git / blobdiff