dict.c API names modified to be more coincise and consistent.

[redis.git] / src / db.c

diff --git a/src/db.c b/src/db.c
index a02f30438d6212ca03d6fba203e92e8256a68718..2bc8d7c4e4d49e686513769df0ce34091857282d 100644 (file)
--- a/src/db.c
+++ b/src/db.c
@@ -34,7 +34,7 @@ void SlotToKeyDel(robj *key);
 robj *lookupKey(redisDb *db, robj *key) {
     dictEntry *de = dictFind(db->dict,key->ptr);
     if (de) {
-        robj *val = dictGetEntryVal(de);
+        robj *val = dictGetVal(de);
 
         /* Update the access time for the aging algorithm.
          * Don't do it if we have a saving child, as this will trigger
@@ -79,7 +79,7 @@ void dbAdd(redisDb *db, robj *key, robj *val) {
     sds copy = sdsdup(key->ptr);
     int retval = dictAdd(db->dict, copy, val);
 
-    redisAssert(retval == REDIS_OK);
+    redisAssertWithInfo(NULL,key,retval == REDIS_OK);
     if (server.cluster_enabled) SlotToKeyAdd(key);
  }
 
@@ -91,7 +91,7 @@ void dbAdd(redisDb *db, robj *key, robj *val) {
 void dbOverwrite(redisDb *db, robj *key, robj *val) {
     struct dictEntry *de = dictFind(db->dict,key->ptr);
     
-    redisAssert(de != NULL);
+    redisAssertWithInfo(NULL,key,de != NULL);
     dictReplace(db->dict, key->ptr, val);
 }
 
@@ -130,7 +130,7 @@ robj *dbRandomKey(redisDb *db) {
         de = dictGetRandomKey(db->dict);
         if (de == NULL) return NULL;
 
-        key = dictGetEntryKey(de);
+        key = dictGetKey(de);
         keyobj = createStringObject(key,sdslen(key));
         if (dictFind(db->expires,key)) {
             if (expireIfNeeded(db,keyobj)) {
@@ -213,7 +213,13 @@ void flushallCommand(redisClient *c) {
         kill(server.bgsavechildpid,SIGKILL);
         rdbRemoveTempFile(server.bgsavechildpid);
     }
-    rdbSave(server.dbfilename);
+    if (server.saveparamslen > 0) {
+        /* Normally rdbSave() will reset dirty, but we don't want this here
+         * as otherwise FLUSHALL will not be replicated nor put into the AOF. */
+        int saved_dirty = server.dirty;
+        rdbSave(server.dbfilename);
+        server.dirty = saved_dirty;
+    }
     server.dirty++;
 }
 
@@ -276,7 +282,7 @@ void keysCommand(redisClient *c) {
     di = dictGetIterator(c->db->dict);
     allkeys = (pattern[0] == '*' && pattern[1] == '\0');
     while((de = dictNext(di)) != NULL) {
-        sds key = dictGetEntryKey(de);
+        sds key = dictGetKey(de);
         robj *keyobj;
 
         if (allkeys || stringmatchlen(pattern,plen,key,sdslen(key),0)) {
@@ -328,6 +334,7 @@ void shutdownCommand(redisClient *c) {
 
 void renameGenericCommand(redisClient *c, int nx) {
     robj *o;
+    time_t expire;
 
     /* To use the same key as src and dst is probably an error */
     if (sdscmp(c->argv[1]->ptr,c->argv[2]->ptr) == 0) {
@@ -339,16 +346,18 @@ void renameGenericCommand(redisClient *c, int nx) {
         return;
 
     incrRefCount(o);
+    expire = getExpire(c->db,c->argv[1]);
     if (lookupKeyWrite(c->db,c->argv[2]) != NULL) {
         if (nx) {
             decrRefCount(o);
             addReply(c,shared.czero);
             return;
         }
-        dbOverwrite(c->db,c->argv[2],o);
-    } else {
-        dbAdd(c->db,c->argv[2],o);
+        /* Overwrite: delete the old key before creating the new one with the same name. */
+        dbDelete(c->db,c->argv[2]);
     }
+    dbAdd(c->db,c->argv[2],o);
+    if (expire != -1) setExpire(c->db,c->argv[2],expire);
     dbDelete(c->db,c->argv[1]);
     signalModifiedKey(c->db,c->argv[1]);
     signalModifiedKey(c->db,c->argv[2]);
@@ -419,7 +428,7 @@ void moveCommand(redisClient *c) {
 int removeExpire(redisDb *db, robj *key) {
     /* 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);
+    redisAssertWithInfo(NULL,key,dictFind(db->dict,key->ptr) != NULL);
     return dictDelete(db->expires,key->ptr) == DICT_OK;
 }
 
@@ -428,8 +437,8 @@ void setExpire(redisDb *db, robj *key, time_t when) {
 
     /* Reuse the sds from the main dict in the expire dict */
     de = dictFind(db->dict,key->ptr);
-    redisAssert(de != NULL);
-    dictReplace(db->expires,dictGetEntryKey(de),(void*)when);
+    redisAssertWithInfo(NULL,key,de != NULL);
+    dictReplace(db->expires,dictGetKey(de),(void*)when);
 }
 
 /* Return the expire time of the specified key, or -1 if no expire
@@ -443,8 +452,8 @@ time_t getExpire(redisDb *db, robj *key) {
 
     /* The entry was found in the expire dict, this means it should also
      * be present in the main dict (safety check). */
-    redisAssert(dictFind(db->dict,key->ptr) != NULL);
-    return (time_t) dictGetEntryVal(de);
+    redisAssertWithInfo(NULL,key,dictFind(db->dict,key->ptr) != NULL);
+    return (time_t) dictGetVal(de);
 }
 
 /* Propagate expires into slaves and the AOF file.
@@ -476,6 +485,9 @@ int expireIfNeeded(redisDb *db, robj *key) {
 
     if (when < 0) return 0; /* No expire for this key */
 
+    /* Don't expire anything while loading. It will be done later. */
+    if (server.loading) return 0;
+
     /* 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.
@@ -513,10 +525,24 @@ void expireGenericCommand(redisClient *c, robj *key, robj *param, long offset) {
         addReply(c,shared.czero);
         return;
     }
-    if (seconds <= 0) {
-        if (dbDelete(c->db,key)) server.dirty++;
-        addReply(c, shared.cone);
+    /* EXPIRE with negative TTL, or EXPIREAT with a timestamp into the past
+     * should never be executed as a DEL when load the AOF or in the context
+     * of a slave instance.
+     *
+     * Instead we take the other branch of the IF statement setting an expire
+     * (possibly in the past) and wait for an explicit DEL from the master. */
+    if (seconds <= 0 && !server.loading && !server.masterhost) {
+        robj *aux;
+
+        redisAssertWithInfo(c,key,dbDelete(c->db,key));
+        server.dirty++;
+
+        /* Replicate/AOF this as an explicit DEL. */
+        aux = createStringObject("DEL",3);
+        rewriteClientCommandVector(c,2,aux,key);
+        decrRefCount(aux);
         signalModifiedKey(c->db,key);
+        addReply(c, shared.cone);
         return;
     } else {
         time_t when = time(NULL)+seconds;