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https://github.com/fluencelabs/redis
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Merge pull request #5426 from soloestoy/feature-xstream
Bugfix data inconsistency after aof rewrite, and add XSTREAM command.
This commit is contained in:
Salvatore Sanfilippo
GitHub
commit
af09df08d7
46
src/aof.c
46
src/aof.c
@ -1139,23 +1139,39 @@ int rewriteStreamObject(rio *r, robj *key, robj *o) {
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streamID id;
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int64_t numfields;
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/* Reconstruct the stream data using XADD commands. */
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while(streamIteratorGetID(&si,&id,&numfields)) {
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/* Emit a two elements array for each item. The first is
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* the ID, the second is an array of field-value pairs. */
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if (s->length) {
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/* Reconstruct the stream data using XADD commands. */
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while(streamIteratorGetID(&si,&id,&numfields)) {
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/* Emit a two elements array for each item. The first is
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* the ID, the second is an array of field-value pairs. */
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/* Emit the XADD <key> <id> ...fields... command. */
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if (rioWriteBulkCount(r,'*',3+numfields*2) == 0) return 0;
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if (rioWriteBulkString(r,"XADD",4) == 0) return 0;
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if (rioWriteBulkObject(r,key) == 0) return 0;
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if (rioWriteBulkStreamID(r,&id) == 0) return 0;
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while(numfields--) {
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unsigned char *field, *value;
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int64_t field_len, value_len;
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streamIteratorGetField(&si,&field,&value,&field_len,&value_len);
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if (rioWriteBulkString(r,(char*)field,field_len) == 0) return 0;
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if (rioWriteBulkString(r,(char*)value,value_len) == 0) return 0;
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/* Emit the XADD <key> <id> ...fields... command. */
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if (rioWriteBulkCount(r,'*',3+numfields*2) == 0) return 0;
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if (rioWriteBulkString(r,"XADD",4) == 0) return 0;
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if (rioWriteBulkObject(r,key) == 0) return 0;
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if (rioWriteBulkStreamID(r,&id) == 0) return 0;
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while(numfields--) {
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unsigned char *field, *value;
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int64_t field_len, value_len;
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streamIteratorGetField(&si,&field,&value,&field_len,&value_len);
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if (rioWriteBulkString(r,(char*)field,field_len) == 0) return 0;
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if (rioWriteBulkString(r,(char*)value,value_len) == 0) return 0;
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}
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}
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/* Append XSTREAM SETID after XADD, make sure lastid is correct,
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* in case of XDEL lastid. */
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if (rioWriteBulkCount(r,'*',4) == 0) return 0;
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if (rioWriteBulkString(r,"XSTREAM",7) == 0) return 0;
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if (rioWriteBulkString(r,"SETID",5) == 0) return 0;
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if (rioWriteBulkObject(r,key) == 0) return 0;
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if (rioWriteBulkStreamID(r,&s->last_id) == 0) return 0;
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} else {
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/* Using XSTREAM CREATE if the stream is empty. */
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if (rioWriteBulkCount(r,'*',4) == 0) return 0;
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if (rioWriteBulkString(r,"XSTREAM",7) == 0) return 0;
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if (rioWriteBulkString(r,"CREATE",6) == 0) return 0;
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if (rioWriteBulkObject(r,key) == 0) return 0;
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if (rioWriteBulkStreamID(r,&s->last_id) == 0) return 0;
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}
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/* Create all the stream consumer groups. */
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@ -314,6 +314,7 @@ struct redisCommand redisCommandTable[] = {
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{"xread",xreadCommand,-4,"rs",0,xreadGetKeys,1,1,1,0,0},
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{"xreadgroup",xreadCommand,-7,"ws",0,xreadGetKeys,1,1,1,0,0},
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{"xgroup",xgroupCommand,-2,"wm",0,NULL,2,2,1,0,0},
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{"xstream",xstreamCommand,-2,"wmFR",0,NULL,2,2,1,0,0},
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{"xack",xackCommand,-4,"wF",0,NULL,1,1,1,0,0},
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{"xpending",xpendingCommand,-3,"r",0,NULL,1,1,1,0,0},
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{"xclaim",xclaimCommand,-6,"wF",0,NULL,1,1,1,0,0},
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@ -2111,6 +2111,7 @@ void xrevrangeCommand(client *c);
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void xlenCommand(client *c);
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void xreadCommand(client *c);
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void xgroupCommand(client *c);
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void xstreamCommand(client *c);
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void xackCommand(client *c);
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void xpendingCommand(client *c);
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void xclaimCommand(client *c);
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@ -1775,6 +1775,75 @@ NULL
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}
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}
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/* XSTREAM CREATE <key> <id or *>
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* XSTREAM SETID <key> <id or $> */
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void xstreamCommand(client *c) {
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const char *help[] = {
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"CREATE <key> <id or *> -- Create a new empty stream.",
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"SETID <key> <id or $> -- Set the current stream ID.",
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"HELP -- Prints this help.",
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NULL
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};
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stream *s = NULL;
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char *opt = c->argv[1]->ptr; /* Subcommand name. */
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/* Dispatch the different subcommands. */
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if (!strcasecmp(opt,"CREATE") && c->argc == 4) {
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robj *o = lookupKeyWrite(c->db,c->argv[2]);
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if (o) {
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addReplySds(c,
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sdsnew("-BUSYSTREAM Stream already exists\r\n"));
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return;
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} else {
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streamID id;
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if (!strcmp(c->argv[3]->ptr,"*")) {
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id.ms = mstime();
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id.seq = 0;
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} else if (streamParseStrictIDOrReply(c,c->argv[3],&id,0) != C_OK) {
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return;
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}
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o = createStreamObject();
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s = o->ptr;
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s->last_id = id;
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dbAdd(c->db,c->argv[2],o);
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robj *idarg = createObjectFromStreamID(&id);
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rewriteClientCommandArgument(c,3,idarg);
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decrRefCount(idarg);
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addReply(c,shared.ok);
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server.dirty++;
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notifyKeyspaceEvent(NOTIFY_STREAM,"xstream-create",
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c->argv[2],c->db->id);
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}
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} else if (!strcasecmp(opt,"SETID") && c->argc == 4) {
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robj *o = lookupKeyWriteOrReply(c,c->argv[2],shared.nokeyerr);
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if (o == NULL || checkType(c,o,OBJ_STREAM)) return;
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s = o->ptr;
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streamID id;
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if (!strcmp(c->argv[3]->ptr,"$")) {
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id = s->last_id;
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} else if (streamParseStrictIDOrReply(c,c->argv[3],&id,0) != C_OK) {
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return;
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}
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if (streamCompareID(&id,&s->last_id) < 0) {
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addReplyError(c,"The ID specified in XSTREAM SETID is smaller than the "
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"target stream top item");
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return;
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}
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s->last_id = id;
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addReply(c,shared.ok);
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server.dirty++;
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notifyKeyspaceEvent(NOTIFY_STREAM,"xstream-setid",
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c->argv[2],c->db->id);
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} else if (!strcasecmp(opt,"HELP")) {
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addReplyHelp(c, help);
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} else {
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addReplySubcommandSyntaxError(c);
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}
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}
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/* XACK <key> <group> <id> <id> ... <id>
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*
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* Acknowledge a message as processed. In practical terms we just check the
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@ -363,3 +363,65 @@ start_server {tags {"stream"} overrides {appendonly yes stream-node-max-entries
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assert {[r xlen mystream] == 90}
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}
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}
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start_server {tags {"xstream command"}} {
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test {XSTREAM can CREATE an empty stream} {
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r XSTREAM CREATE mystream *
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assert {[dict get [r xinfo stream mystream] length] == 0}
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}
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test {XSTREAM cannot CREATE on an busy stream} {
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catch {r XSTREAM CREATE mystream *} err
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set _ $err
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} {BUSY*}
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test {XSTREAM can CREATE an empty stream with specific ID} {
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r del mystream
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r XSTREAM CREATE mystream "100-100"
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assert {[dict get [r xinfo stream mystream] length] == 0}
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assert {[dict get [r xinfo stream mystream] last-generated-id] == "100-100"}
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}
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test {XSTREAM can SETID with $} {
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r XSTREAM SETID mystream $
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assert {[dict get [r xinfo stream mystream] last-generated-id] == "100-100"}
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}
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test {XSTREAM can SETID with specific ID} {
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r XSTREAM SETID mystream "200-0"
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assert {[dict get [r xinfo stream mystream] last-generated-id] == "200-0"}
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}
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test {XSTREAM cannot SETID with smaller ID} {
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catch {r XSTREAM SETID mystream "0-0"} err
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set _ $err
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} {ERR*smaller*}
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test {XSTREAM cannot SETID on non-existent key} {
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catch {r XSTREAM SETID stream $} err
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set _ $err
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} {ERR no such key}
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}
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start_server {tags {"stream"} overrides {appendonly yes aof-use-rdb-preamble no}} {
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test {Empty stream can be rewrite into AOF correctly} {
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r XSTREAM CREATE mystream 0
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assert {[dict get [r xinfo stream mystream] length] == 0}
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r bgrewriteaof
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waitForBgrewriteaof r
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r debug loadaof
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assert {[dict get [r xinfo stream mystream] length] == 0}
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}
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test {Stream can be rewrite into AOF correctly after XDEL lastid} {
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r XADD mystream 1-1 a b
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r XADD mystream 2-2 a b
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assert {[dict get [r xinfo stream mystream] length] == 2}
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r XDEL mystream 2-2
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r bgrewriteaof
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waitForBgrewriteaof r
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r debug loadaof
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assert {[dict get [r xinfo stream mystream] length] == 1}
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assert {[dict get [r xinfo stream mystream] last-generated-id] == "2-2"}
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}
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}
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