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ctrip_crdt_hashmap.c
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ctrip_crdt_hashmap.c
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/*
* Copyright (c) 2009-2012, CTRIP CORP <RDkjdata at ctrip dot com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Redis nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
//
// Created by zhuchen on 2019/9/4.
//
#include "ctrip_crdt_hashmap.h"
#include "crdt_register.h"
#include "utils.h"
#include "crdt.h"
#include "crdt_statistics.h"
/*
util
*/
CrdtObjectMethod HashCommonMethod = {
.merge = crdtHashMerge,
.filterAndSplit = crdtHashFilter,
.filterAndSplit2 = crdtHashFilter2,
.freefilter = freeHashFilter
};
CrdtDataMethod HashDataMethod = {
.propagateDel = crdtHashDelete,
.getLastVC = crdtHashGetLastVC,
.updateLastVC = crdtHashUpdateLastVC,
.info = crdtHashInfo,
.getLastGid = NULL,
};
CrdtHashMethod Hash_Methods = {
.change = changeCrdtHash,
.dup = dupCrdtHash,
.getLastVC = getCrdtHashLastVc,
.updateLastVC = updateLastVCHash,
};
CrdtTombstoneMethod HashTombstoneCommonMethod = {
.merge = crdtHashTombstoneMerge,
.filterAndSplit = crdtHashTombstoneFilter,
.filterAndSplit2 = crdtHashTombstoneFilter2,
.freefilter = freeHashTombstoneFilter,
.gc = crdtHashTombstoneGc,
.purge = crdtHashTombstonePurge,
.info = crdtHashTombstoneInfo,
.getVc = clone_ht_vc,
};
dictType crdtHashDictType = {
dictSdsHash, /* hash function */
NULL, /* key dup */
NULL, /* val dup */
dictSdsKeyCompare, /* key compare */
dictSdsDestructor, /* key destructor */
dictCrdtRegisterDestructor /* val destructor */
};
dictType crdtHashFileterDictType = {
dictSdsHash, /* hash function */
NULL, /* key dup */
NULL, /* val dup */
dictSdsKeyCompare, /* key compare */
NULL, /* key destructor */
NULL /* val destructor */
};
dictType crdtHashTombstoneDictType = {
dictSdsHash, /* hash function */
NULL, /* key dup */
NULL, /* val dup */
dictSdsKeyCompare, /* key compare */
dictSdsDestructor, /* key destructor */
dictCrdtRegisterTombstoneDestructor /* val destructor */
};
static RedisModuleType *CrdtHash;
static RedisModuleType *CrdtHashTombstone;
int isCrdtHash(void* data) {
CRDT_Hash* hash = (CRDT_Hash*)data;
if(hash != NULL && (getDataType((CrdtObject*)hash) == CRDT_HASH_TYPE)) {
return CRDT_OK;
}
return CRDT_NO;
}
int isCrdtHashTombstone(void *data) {
CRDT_HashTombstone* tombstone = (CRDT_HashTombstone*)data;
if(tombstone != NULL && (getDataType((CrdtObject*)tombstone) == CRDT_HASH_TYPE)) {
return CRDT_OK;
}
return CRDT_NO;
}
CRDT_Hash* retrieveCrdtHash(void* t) {
if(t == NULL) {
return NULL;
}
CRDT_Hash* result = (CRDT_Hash*)t;
crdtAssert(result->map != NULL);
return result;
}
CRDT_HashTombstone* retrieveCrdtHashTombstone(void* t) {
if(t == NULL) {
return NULL;
}
CRDT_HashTombstone* result = (CRDT_HashTombstone*)t;
crdtAssert(result->map != NULL);
return result;
}
int crdtHtNeedsResize(dict *dict) {
long long size, used;
size = dictSlots(dict);
used = dictSize(dict);
return (size > DICT_HT_INITIAL_SIZE &&
(used*100/size < HASHTABLE_MIN_FILL));
}
#define CHANGE_HASH_ERR -1
#define NO_CHANGE_HASH 0
#define ADD_HASH 1
#define UPDATE_HASH 2
int addOrUpdateItem(RedisModuleCtx* ctx, CRDT_HashTombstone* tombstone, CRDT_Hash* current, CrdtMeta* meta,RedisModuleString* key, sds field, sds value) {
int result_code = NO_CHANGE_HASH;
CrdtMeta* meta_copy = dupMeta(meta);
if(tombstone) {
dictEntry* tomDe = dictFind(tombstone->map, field);
if(tomDe) {
CRDT_RegisterTombstone* tombstoneValue = dictGetVal(tomDe);
int result = compareCrdtRegisterTombstone(tombstoneValue, meta_copy);
if(isConflictCommon(result)) {
RedisModule_IncrCrdtConflict(SET_DEL_CONFLICT | MODIFYCONFLICT);
}
if(result > COMPARE_META_EQUAL) {
appendCrdtMeta(getCrdtRegisterTombstoneMeta(tombstoneValue), meta_copy);
freeCrdtMeta(meta_copy);
return result_code;
}
appendCrdtMeta(meta_copy, getCrdtRegisterTombstoneMeta(tombstoneValue));
dictDelete(tombstone->map, field);
}
}
dictEntry* de = dictFind(current->map, field);
if(de == NULL) {
CRDT_Register* v = createCrdtRegister();
crdtRegisterSetValue(v, meta_copy, value);
dictAdd(current->map, sdsdup(field), v);
result_code = ADD_HASH;
} else {
CRDT_Register* v = dictGetVal(de);
int result = compareCrdtMeta(getCrdtRegisterLastMeta(v), meta_copy);
if(result == COMPARE_META_VECTORCLOCK_LT) {
freeCrdtMeta(meta_copy);
return result_code;
}
sds prev = NULL;
int isConflict = isConflictCommon(result);
if(isConflict == CRDT_YES) {
prev = crdtRegisterInfo(v);
}
crdtRegisterTryUpdate(v, meta_copy, value, result);
if(isConflict == CRDT_YES) {
sds income = crdtRegisterInfoFromMetaAndValue(meta_copy, value);
sds future = crdtRegisterInfo(v);
if(result > COMPARE_META_EQUAL) {
RedisModule_Log(ctx, CRDT_DEBUG_LOG_LEVEL, "[CONFLICT][CRDT-HASH][replace] {key: %s, field: %s} [prev] {%s} [income] {%s} [future] {%s}",
RedisModule_GetSds(key), field, prev, income, future);
}else{
RedisModule_Log(ctx, CRDT_DEBUG_LOG_LEVEL, "[CONFLICT][CRDT-HASH][drop] {key: %s, field: %s} [prev] {%s} [income] {%s} [future] {%s}",
RedisModule_GetSds(key), field, prev, income, future);
}
RedisModule_IncrCrdtConflict(MODIFYCONFLICT | SET_CONFLICT);
sdsfree(income);
sdsfree(future);
sdsfree(prev);
}
if(result > COMPARE_META_EQUAL) {
result_code = UPDATE_HASH;
}
}
freeCrdtMeta(meta_copy);
return result_code;
}
int addOrUpdateHash(RedisModuleCtx* ctx, RedisModuleString* key, RedisModuleKey* moduleKey,CRDT_HashTombstone* tombstone, CRDT_Hash* current, CrdtMeta* meta , RedisModuleString** argv, int start_index, int argc) {
int need_created = CRDT_NO;
if(current != NULL) {
if(!isCrdtHash(current)) {
const char* keyStr = RedisModule_StringPtrLen(key, NULL);
RedisModule_Log(ctx, CRDT_DEBUG_LOG_LEVEL, "[CONFLICT][CRDT-HASH][type conflict] key:{%s} prev: {%s} ",
keyStr ,current->type);
RedisModule_IncrCrdtConflict(MODIFYCONFLICT | TYPECONFLICT);
RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
return CHANGE_HASH_ERR;
}
} else {
need_created = CRDT_OK;
current = createCrdtHash();
}
int changed = 0;
for (int i = start_index; i < argc; i+=2) {
sds field = RedisModule_GetSds(argv[i]);
sds value = RedisModule_GetSds(argv[i + 1]);
int result = addOrUpdateItem(ctx, tombstone, current, meta, key, field, value);
if(result == ADD_HASH) changed++;
}
mergeCrdtHashLastVc(current, getMetaVectorClock(meta));
if(changed > 0) {
changeCrdtHash(current, meta);
if(need_created == CRDT_OK) {
RedisModule_ModuleTypeSetValue(moduleKey, CrdtHash, current);
}
return changed;
}
if(need_created == CRDT_OK) freeCrdtHash(current);
return changed;
}
CRDT_Register * hashTypeGetFromHashTable(CRDT_Hash *o, sds field) {
dictEntry *de;
de = dictFind(o->map, field);
if (de == NULL) return NULL;
return dictGetVal(de);
}
static int addCrdtHashFieldToReply(RedisModuleCtx *ctx, CRDT_Hash *crdtHash, RedisModuleString *field) {
if (crdtHash == NULL) {
return RedisModule_ReplyWithNull(ctx);
}
sds fld = RedisModule_GetSds(field);
if(fld == NULL) {
return RedisModule_ReplyWithError(ctx, "22 Operation against a key holding the wrong kind of value");
}
CRDT_Register *crdtRegister = hashTypeGetFromHashTable(crdtHash, fld);
if (crdtRegister == NULL) {
return RedisModule_ReplyWithNull(ctx);
} else {
sds val = getCrdtRegisterLastValue(crdtRegister);
return RedisModule_ReplyWithStringBuffer(ctx, val, sdslen(val));
}
}
/* --------------------------------------------------------------------------
* User API for Hash type
* -------------------------------------------------------------------------- */
const char* crdt_hset_head = "$9\r\nCRDT.HSET\r\n";
const size_t crdt_hset_basic_str_len = 15 + REPLICATION_ARGC_LEN + REPLICATION_MAX_STR_LEN + REPLICATION_MAX_GID_LEN + REPLICATION_MAX_LONGLONG_LEN + REPLICATION_MAX_VC_LEN + REPLICATION_MAX_LONGLONG_LEN;
size_t replicationFeedCrdtHsetCommand(RedisModuleCtx *ctx,char* cmdbuf,const char* keystr, size_t keylen, CrdtMeta* meta, VectorClock vc,int argc, const char** fieldAndValStr, int* fieldAndValStrLen) {
size_t cmdlen = 0;
cmdlen += feedArgc(cmdbuf, argc + 6);
static size_t crdt_hset_head_str_len = 0;
if(crdt_hset_head_str_len == 0) {
crdt_hset_head_str_len = strlen(crdt_hset_head);
}
cmdlen += feedBuf(cmdbuf+ cmdlen, crdt_hset_head, crdt_hset_head_str_len);
cmdlen += feedStr2Buf(cmdbuf + cmdlen, keystr, keylen);//$%d\r\n%s\r\n
cmdlen += feedMeta2Buf(cmdbuf + cmdlen ,getMetaGid(meta), getMetaTimestamp(meta), vc);
cmdlen += feedLongLong2Buf(cmdbuf + cmdlen, (long long) (argc));
for(int i = 0, len = argc; i < len; i+=2) {
cmdlen += feedKV2Buf(cmdbuf+ cmdlen, fieldAndValStr[i], fieldAndValStrLen[i], fieldAndValStr[i+1], fieldAndValStrLen[i+1]);
}
// RedisModule_Debug(logLevel, "len:%d buf:%s", cmdlen, cmdbuf);
RedisModule_ReplicationFeedStringToAllSlaves(RedisModule_GetSelectedDb(ctx), cmdbuf, cmdlen);
return cmdlen;
}
#define HSET_NO_FLAGS 0
#define HSET_NX (1<<0) /* Set if key not exists. */
//hset key f1 v2 f2 v2 ..
int hsetGenericCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc, int flags) {
// RedisModule_AutoMemory(ctx);
int result = 0;
CrdtMeta meta = {.gid=0,.timestamp=INIT_TIMESTAMP};
#if defined(HSET_STATISTICS)
get_modulekey_start();
#endif
RedisModuleKey* moduleKey = getWriteRedisModuleKey(ctx, argv[1], CrdtHash);
if (moduleKey == NULL) {
return -1;
}
CRDT_Hash* current = getCurrentValue(moduleKey);
#if defined(HSET_STATISTICS)
get_modulekey_end();
#endif
if(flags & HSET_NX && current != NULL) {
for(int i = 2; i < argc; i++) {
sds field = RedisModule_GetSds(argv[i]);
dictEntry* de = dictFind(current->map, field);
if(de != NULL) {
RedisModule_CloseKey(moduleKey);
return 0;
}
}
}
initIncrMeta(&meta);
size_t keylen = 0;
const char* keystr = RedisModule_StringPtrLen(argv[1], &keylen);
const char* fieldAndValStr[argc-2];
int fieldAndValStrLen[argc-2];
size_t fieldAndValAllStrLen = 0;
CrdtTombstone* t = getTombstone(moduleKey);
CRDT_HashTombstone* tombstone = NULL;
if(t != NULL && isCrdtHashTombstone(t)) {
tombstone = retrieveCrdtHashTombstone(t);
}
if(current == NULL) {
current = createCrdtHash();
if(tombstone) {
updateLastVCHash(current, getCrdtHashTombstoneLastVc(tombstone));
} else {
long long vc = RedisModule_CurrentVectorClock();
updateLastVCHash(current, LL2VC(vc));
}
RedisModule_ModuleTypeSetValue(moduleKey, CrdtHash, current);
}
appendVCForMeta(&meta, getCrdtHashLastVc(current));
for(int i = 2; i < argc; i += 2) {
sds field = RedisModule_GetSds(argv[i]);
dictEntry* de = dictFind(current->map, field);
if(de == NULL) {
#if defined(HSET_STATISTICS)
add_val_start();
#endif
CRDT_Register* v = createCrdtRegister();
crdtRegisterSetValue(v, &meta, RedisModule_GetSds(argv[i+1]));
dictAdd(current->map, sdsdup(field), v);
result += 1;
#if defined(HSET_STATISTICS)
add_val_end();
#endif
} else {
#if defined(HSET_STATISTICS)
update_val_start();
#endif
CRDT_Register* v = dictGetVal(de);
crdtRegisterTryUpdate(v, &meta, RedisModule_GetSds(argv[i+1]), COMPARE_META_VECTORCLOCK_GT);
#if defined(HSET_STATISTICS)
update_val_end();
#endif
}
if(tombstone) {
dictDelete(tombstone->map, field);
}
size_t fieldstrlen = 0;
const char* fieldstr = RedisModule_StringPtrLen(argv[i], &fieldstrlen);
size_t valstrlen = 0;
const char* valstr = RedisModule_StringPtrLen(argv[i+1], &valstrlen);
fieldAndValStr[i-2] = fieldstr;
fieldAndValStr[i-1] = valstr;
fieldAndValStrLen[i-2] = fieldstrlen;
fieldAndValStrLen[i-1] = valstrlen;
fieldAndValAllStrLen += fieldstrlen + valstrlen + 2 * REPLICATION_MAX_STR_LEN;
}
setCrdtHashLastVc(current, getMetaVectorClock(&meta));
#if defined(HSET_STATISTICS)
send_event_start();
#endif
RedisModule_NotifyKeyspaceEvent(ctx, REDISMODULE_NOTIFY_HASH, "hset", argv[1]);
#if defined(HSET_STATISTICS)
send_event_end();
#endif
#if defined(HSET_STATISTICS)
write_bakclog_start();
#endif
size_t alllen = crdt_hset_basic_str_len + keylen + fieldAndValAllStrLen;
char *cmdbuf = RedisModule_GetSharedBuffer(alllen);
if (cmdbuf == NULL) {
cmdbuf = RedisModule_Alloc(alllen);
replicationFeedCrdtHsetCommand(ctx, cmdbuf, keystr, keylen, &meta, getCrdtHashLastVc(current),argc - 2, fieldAndValStr, fieldAndValStrLen);
RedisModule_Free(cmdbuf);
}else {
replicationFeedCrdtHsetCommand(ctx, cmdbuf, keystr, keylen, &meta, getCrdtHashLastVc(current),argc - 2, fieldAndValStr, fieldAndValStrLen);
RedisModule_ReturnSharedBuffer(cmdbuf);
}
#if defined(HSET_STATISTICS)
write_backlog_end();
#endif
//becase setCrdtHashLastVc move vector
// freeIncrMeta(&meta);
if(moduleKey != NULL ) RedisModule_CloseKey(moduleKey);
return result;
}
int hsetnxCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc != 4) return RedisModule_WrongArity(ctx);
int result = hsetGenericCommand(ctx, argv, argc, HSET_NX);
if(result < 0) { return result; }
return RedisModule_ReplyWithLongLong(ctx, result);
}
int hsetCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc < 4) return RedisModule_WrongArity(ctx);
if ((argc % 2) == 1) {
return RedisModule_WrongArity(ctx);
}
int result = hsetGenericCommand(ctx, argv, argc, HSET_NO_FLAGS);
if(result < 0) { return result; }
sds cmdname = RedisModule_GetSds(argv[0]);
if (cmdname[1] == 's' || cmdname[1] == 'S') {
/* HSET */
return RedisModule_ReplyWithLongLong(ctx, result);
} else {
/* HMSET */
return RedisModule_ReplyWithOk(ctx);
}
}
int hgetCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
CRDT_Hash *crdtHash;
RedisModule_AutoMemory(ctx);
if (argc != 3) return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_READ);
if (RedisModule_KeyType(key) == REDISMODULE_KEYTYPE_EMPTY) {
RedisModule_CloseKey(key);
return RedisModule_ReplyWithNull(ctx);
} else if (RedisModule_ModuleTypeGetType(key) != CrdtHash) {
RedisModule_CloseKey(key);
return RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
} else {
crdtHash = RedisModule_ModuleTypeGetValue(key);
}
int result = addCrdtHashFieldToReply(ctx, crdtHash, argv[2]);
RedisModule_CloseKey(key);
return result;
}
int hmgetCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if(argc < 3) return RedisModule_WrongArity(ctx);
/* Don't abort when the key cannot be found. Non-existing keys are empty
* hashes, where HMGET should respond with a series of null bulks. */
RedisModule_AutoMemory(ctx);
CRDT_Hash *crdtHash = NULL;
int i;
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_READ);
if (RedisModule_KeyType(key) != REDISMODULE_KEYTYPE_EMPTY && RedisModule_ModuleTypeGetType(key) != CrdtHash) {
RedisModule_CloseKey(key);
return RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
} else {
crdtHash = RedisModule_ModuleTypeGetValue(key);
}
RedisModule_ReplyWithArray(ctx, argc-2);
for (i = 2; i < argc; i++) {
addCrdtHashFieldToReply(ctx, crdtHash, argv[i]);
}
RedisModule_CloseKey(key);
return REDISMODULE_OK;
}
void addTombstone(CRDT_HashTombstone* tombstone, sds field, CrdtMeta* meta, int* comapre) {
dictEntry *tde = dictFind(tombstone->map, field);
CRDT_RegisterTombstone *t;
if(tde == NULL) {
t = createCrdtRegisterTombstone();
dictAdd(tombstone->map, sdsdup(field), t);
}else{
t = dictGetVal(tde);
}
addRegisterTombstone(t, meta, comapre);
}
int hdelCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if(argc < 3) return RedisModule_WrongArity(ctx);
int status = CRDT_OK;
int deleted = 0;
CrdtMeta hdel_meta = {.gid=0,.timestamp=INIT_TIMESTAMP};
RedisModuleKey* moduleKey = getWriteRedisModuleKey(ctx, argv[1], CrdtHash);
if(moduleKey == NULL) {
status = CRDT_ERROR;
goto end;
}
CrdtTombstone* t = getTombstone(moduleKey);
CRDT_HashTombstone* tombstone = NULL;
if(t != NULL && isCrdtHashTombstone(t)) {
tombstone = retrieveCrdtHashTombstone(t);
}
initIncrMeta(&hdel_meta);
CRDT_Hash* current = getCurrentValue(moduleKey);
if(current == NULL) {
goto end;
}
int createTombstoned = 0;
if(tombstone == NULL) {
tombstone = createCrdtHashTombstone();
createTombstoned = 1;
}
appendVCForMeta(&hdel_meta, getCrdtHashLastVc(current));
RedisModuleString** deleted_objs = RedisModule_PoolAlloc(ctx, sizeof(RedisModuleString*) * (argc-2));
for(int j = 2; j < argc; j++) {
sds field = RedisModule_GetSds(argv[j]);
if(dictDelete(current->map, field) == DICT_OK) {
int compare = 0;
addTombstone(tombstone, field, &hdel_meta, &compare);
if(isConflictCommon(compare)) {
RedisModule_IncrCrdtConflict(DEL_CONFLICT | MODIFYCONFLICT);
}
deleted_objs[deleted] = argv[j];
deleted++;
}
}
if(deleted > 0) {
changeCrdtHashTombstone(tombstone, &hdel_meta);
if (createTombstoned) {
RedisModule_ModuleTombstoneSetValue(moduleKey, CrdtHashTombstone, tombstone);
}
RedisModule_NotifyKeyspaceEvent(ctx, REDISMODULE_NOTIFY_HASH,"hdel", argv[1]);
} else {
if (createTombstoned) {
freeCrdtHashTombstone(tombstone);
tombstone = NULL;
}
}
if (dictSize(current->map) == 0) {
RedisModule_DeleteKey(moduleKey);
RedisModule_NotifyKeyspaceEvent(ctx, REDISMODULE_NOTIFY_GENERIC, "del", argv[1]);
} else {
if (crdtHtNeedsResize(current->map)) dictResize(current->map);
if (deleted > 0) changeCrdtHash(current, &hdel_meta);
}
end:
if(hdel_meta.gid != 0) {
if(deleted > 0) {
sds vcStr = vectorClockToSds(getMetaVectorClock(&hdel_meta));
size_t argc_repl = (size_t) deleted;
void *argv_repl = (void *) deleted_objs;
//CRDT.REM_HASH <key> gid timestamp <del-op-vclock> <field1> <field2> ...
RedisModule_CrdtReplicateAlsoNormReplicate(ctx, "CRDT.REM_HASH", "sllcv", argv[1], getMetaGid(&hdel_meta), getMetaTimestamp(&hdel_meta), vcStr, argv_repl, argc_repl);
sdsfree(vcStr);
}
freeIncrMeta(&hdel_meta);
}
if(moduleKey != NULL) RedisModule_CloseKey(moduleKey);
if(status == CRDT_OK) {
return RedisModule_ReplyWithLongLong(ctx, deleted);
}else{
return CRDT_ERROR;
}
}
void tombstone_add_element(CRDT_HashTombstone* tombstone, sds field, CrdtMeta* meta) {
dictEntry* de = dictFind(tombstone->map, field);
CRDT_RegisterTombstone* d = NULL;
if(de) {
// dictDelete(tombstone->map, field);
d = dictGetVal(de);
} else {
de = dictAddRaw(tombstone->map, sdsdup(field), NULL);
d = createCrdtRegisterTombstone();
}
// appendCrdtMeta(meta, getMaxDelCrdtHashTombstone(tombstone));
int r = 0;
addRegisterTombstone(d, meta, &r);
// dictAdd(tombstone->map, sdsdup(field), d);
dictSetVal(tombstone->map, de, d);
}
// "CRDT.HSET", <key>, <gid>, <timestamp>, <vclockStr>, <length> <field> <val> <field> <val> . . .);
// 0 1 2 3 4 5 6
int CRDT_HSetCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc < 5) return RedisModule_WrongArity(ctx);
int status = CRDT_OK;
CrdtMeta* meta = getMeta(ctx, argv, 2);
if (meta == NULL) {
return 0;
}
RedisModuleKey* moduleKey = getWriteRedisModuleKey(ctx, argv[1], CrdtHash);
if (moduleKey == NULL) {
RedisModule_IncrCrdtConflict(TYPECONFLICT | MODIFYCONFLICT);
status = CRDT_ERROR;
goto end;
}
CrdtTombstone* t = getTombstone(moduleKey);
CRDT_HashTombstone* tombstone = NULL;
if ( t != NULL && isCrdtHashTombstone(t)) {
tombstone = retrieveCrdtHashTombstone(t);
int result = compareCrdtHashTombstone(tombstone, meta);
if(isConflictCommon(result)) {
RedisModule_IncrCrdtConflict(SET_DEL_CONFLICT | MODIFYCONFLICT);
}
if(result > COMPARE_META_EQUAL) {
//to do
// getCRDTHash(tombstone);
if(result > COMPARE_META_VECTORCLOCK_GT) {
// CRDT_RegisterTombstone* tkv = createCrdtRegisterTombstone();
// appendCrdtMeta(meta, getMaxDelCrdtHashTombstone(tombstone));
// int r = 0;
// addRegisterTombstone(tkv, meta, &r);
// sds field = RedisModule_GetSds(argv[6]);
//dupCrdtRegisterTombstone(tkv)
// add_tombstone(tombstone, field, tkv);
for (int i = 6; i < argc; i+=2) {
sds field = RedisModule_GetSds(argv[i]);
tombstone_add_element(tombstone, field, meta);
}
}
goto end;
}
}
CRDT_Hash* current = getCurrentValue(moduleKey);
if(addOrUpdateHash(ctx, argv[1], moduleKey, tombstone, current, meta, argv, 6, argc) == CHANGE_HASH_ERR) {
status = CRDT_ERROR;
goto end;
}
RedisModule_MergeVectorClock(getMetaGid(meta), getMetaVectorClockToLongLong(meta));
RedisModule_NotifyKeyspaceEvent(ctx, REDISMODULE_NOTIFY_HASH, "hset", argv[1]);
end:
if (meta != NULL) {
RedisModule_CrdtReplicateVerbatim(getMetaGid(meta), ctx);
freeCrdtMeta(meta);
}
if (moduleKey != NULL) RedisModule_CloseKey(moduleKey);
if(status == CRDT_OK) {
return RedisModule_ReplyWithOk(ctx);
}else{
return CRDT_ERROR;
}
}
// "CRDT.HGET", <key>, <field>
// 0 1 2
// <value> <gid> <timestamp> <vectorClock>
// 0 1 2 3
int CRDT_HGetCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc != 3) return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_READ);
CRDT_Hash *crdtHash;
if (RedisModule_KeyType(key) == REDISMODULE_KEYTYPE_EMPTY) {
RedisModule_CloseKey(key);
return RedisModule_ReplyWithNull(ctx);
} else if (RedisModule_ModuleTypeGetType(key) != CrdtHash) {
RedisModule_CloseKey(key);
return RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
} else {
crdtHash = RedisModule_ModuleTypeGetValue(key);
}
if (crdtHash == NULL) {
return RedisModule_ReplyWithNull(ctx);
}
sds fld = RedisModule_GetSds(argv[2]);
if(fld == NULL) {
RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
return RedisModule_ReplyWithNull(ctx);
}
CRDT_Register *crdtRegister = hashTypeGetFromHashTable(crdtHash, fld);
if (crdtRegister == NULL) {
return RedisModule_ReplyWithNull(ctx);
}
sds value = getCrdtRegisterLastValue(crdtRegister);
RedisModule_ReplyWithArray(ctx, 4);
RedisModule_ReplyWithStringBuffer(ctx, value, sdslen(value));
RedisModule_ReplyWithLongLong(ctx, getCrdtRegisterLastGid(crdtRegister));
RedisModule_ReplyWithLongLong(ctx, getCrdtRegisterLastTimestamp(crdtRegister));
sds vclockSds = vectorClockToSds(getCrdtRegisterLastVc(crdtRegister));
RedisModule_ReplyWithStringBuffer(ctx, vclockSds, sdslen(vclockSds));
sdsfree(vclockSds);
RedisModule_CloseKey(key);
return REDISMODULE_OK;
}
int CRDT_HDataInfoCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc != 3) return RedisModule_WrongArity(ctx);
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE | REDISMODULE_TOMBSTONE);
CRDT_Hash *crdtHash = NULL;
if (RedisModule_KeyType(key) == REDISMODULE_KEYTYPE_EMPTY) {
// RedisModule_CloseKey(key);
// return RedisModule_ReplyWithNull(ctx);
} else if (RedisModule_ModuleTypeGetType(key) != CrdtHash) {
RedisModule_CloseKey(key);
return RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
} else {
crdtHash = RedisModule_ModuleTypeGetValue(key);
}
sds fld = RedisModule_GetSds(argv[2]);
if(fld == NULL) {
RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
return RedisModule_ReplyWithNull(ctx);
}
if(crdtHash) {
dictEntry* de = dictFind(crdtHash->map, fld);
if(de) {
CRDT_Register *crdtRegister = dictGetVal(de);
sds info = crdtRegisterInfo(crdtRegister);
RedisModule_ReplyWithStringBuffer(ctx, info, sdslen(info));
sdsfree(info);
goto end;
}
}
CRDT_HashTombstone* tom = getTombstone(key);
if(!isCrdtHashTombstone(tom)) {
RedisModule_ReplyWithNull(ctx);
goto end;
}
if(tom) {
dictEntry* de = dictFind(tom->map, fld);
if(de) {
CRDT_RegisterTombstone *reg = dictGetVal(de);
sds info = crdtRegisterTombstoneInfo(reg);
RedisModule_ReplyWithStringBuffer(ctx, info, sdslen(info));
sdsfree(info);
goto end;
}
}
RedisModule_ReplyWithNull(ctx);
// sds value = getCrdtRegisterLastValue(crdtRegister);
// RedisModule_ReplyWithArray(ctx, 4);
// RedisModule_ReplyWithStringBuffer(ctx, value, sdslen(value));
// RedisModule_ReplyWithLongLong(ctx, getCrdtRegisterLastGid(crdtRegister));
// RedisModule_ReplyWithLongLong(ctx, getCrdtRegisterLastTimestamp(crdtRegister));
// sds vclockSds = vectorClockToSds(getCrdtRegisterLastVc(crdtRegister));
// RedisModule_ReplyWithStringBuffer(ctx, vclockSds, sdslen(vclockSds));
// sdsfree(vclockSds);
end:
RedisModule_CloseKey(key);
return REDISMODULE_OK;
}
//CRDT.DEL_HASH <key> gid timestamp <del-op-vclock> <max-deleted-vclock>
// 0 1 2 3 4 5
//CRDT.DEL_HASH <key> gid timestamp <del-op-vclock> <max-vclock> <expireVc>
// 0 1 2 3 4 5 6
int CRDT_DelHashCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 5) return RedisModule_WrongArity(ctx);
CrdtMeta* meta = getMeta(ctx, argv, 2);
if(meta == NULL) {
return CRDT_ERROR;
}
int status = CRDT_OK;
int deleted = 0;
RedisModuleKey* moduleKey = getWriteRedisModuleKey(ctx, argv[1], CrdtHash);
if(moduleKey == NULL) {
RedisModule_IncrCrdtConflict(TYPECONFLICT | MODIFYCONFLICT);
status = 1;
goto end;
}
CrdtTombstone* t = getTombstone(moduleKey);
CRDT_HashTombstone* tombstone = NULL;
if(t != NULL) {
if(isCrdtHashTombstone(t)) {
tombstone = retrieveCrdtHashTombstone(t);
}
}
if(tombstone == NULL) {
tombstone = createCrdtHashTombstone();
RedisModule_ModuleTombstoneSetValue(moduleKey, CrdtHashTombstone, tombstone);
}
int compare = 0;
updateMaxDelCrdtHashTombstone(tombstone, meta, &compare);
if(isConflictCommon(compare)) {
RedisModule_IncrCrdtConflict(DEL_CONFLICT | MODIFYCONFLICT);
}
changeCrdtHashTombstone(tombstone, meta);
CRDT_Hash* current = getCurrentValue(moduleKey);
if(current == NULL) {
goto end;
}
if(!isCrdtHash(current)) {
const char* keyStr = RedisModule_StringPtrLen(argv[1], NULL);
RedisModule_Log(ctx, CRDT_DEBUG_LOG_LEVEL, "[CONFLICT][CRDT-HASH][type conflict] key:{%s} prev: {%s} ",
keyStr , current->type);
RedisModule_IncrCrdtConflict(MODIFYCONFLICT | TYPECONFLICT);
RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
status = CRDT_ERROR;
goto end;
}
dictIterator *di = dictGetSafeIterator(current->map);
dictEntry *de;
int hasDataTombstoneConflict = 0;
while ((de = dictNext(di)) != NULL) {
CRDT_Register *kv = dictGetVal(de);
int result = compareCrdtRegisterAndDelMeta(kv, meta);
if(!hasDataTombstoneConflict && isConflictCommon(result)) {
hasDataTombstoneConflict = 1;
}
if(result > COMPARE_META_EQUAL) {
if(result > COMPARE_META_VECTORCLOCK_GT) {
// CRDT_RegisterTombstone* tkv = createCrdtRegisterTombstone();
// CrdtMeta* m = dupMeta(getCrdtRegisterTombstoneMeta(kv));
// appendCrdtMeta(m, meta);
// int r = 0;
// addRegisterTombstone(tkv, m, &r);
// freeCrdtMeta(m);
// dictAdd(tombstone->map, sdsdup(dictGetKey(de)), tkv);
tombstone_add_element(tombstone, dictGetKey(de), meta);
}
dictDelete(current->map, dictGetKey(de));
deleted++;
} else if(result < COMPARE_META_VECTORCLOCK_LT) {
appendCrdtMeta(getCrdtRegisterLastMeta(kv), meta);
}
}
if(hasDataTombstoneConflict) {
RedisModule_IncrCrdtConflict(MODIFYCONFLICT | SET_DEL_CONFLICT);
}
dictReleaseIterator(di);
di = dictGetSafeIterator(tombstone->map);
while ((de = dictNext(di)) != NULL) {
CRDT_RegisterTombstone *tkv = dictGetVal(de);
int result = compareCrdtMeta(getCrdtRegisterTombstoneMeta(tkv), meta);
if( result < COMPARE_META_EQUAL) {
dictDelete(tombstone->map, dictGetKey(de));
} else {
addRegisterTombstone(tkv, meta, &result);
}
}
dictReleaseIterator(di);
if (dictSize(current->map) == 0) {
RedisModule_DeleteKey(moduleKey);
} else {
/* Always check if the dictionary needs a resize after a delete. */
if (crdtHtNeedsResize(current->map)) dictResize(current->map);
}
RedisModule_MergeVectorClock(getMetaGid(meta), getMetaVectorClockToLongLong(meta));
RedisModule_NotifyKeyspaceEvent(ctx, REDISMODULE_NOTIFY_GENERIC, "del", argv[1]);
end:
if(meta) {
RedisModule_CrdtReplicateVerbatim(getMetaGid(meta), ctx);
freeCrdtMeta(meta);
}
if(moduleKey) RedisModule_CloseKey(moduleKey);
if(status == CRDT_OK) {
return RedisModule_ReplyWithLongLong(ctx, deleted);
}else{
return CRDT_ERROR;
}
}
//CRDT.REM_HASH <key> gid timestamp <del-op-vclock> <field1> <field2> ....
// 0 1 2 3 4 5
int CRDT_RemHashCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 4) return RedisModule_WrongArity(ctx);
CrdtMeta* meta = getMeta(ctx, argv, 2);
if(meta == NULL) {
return 0;
}
int status = CRDT_OK;
RedisModuleKey* moduleKey = getWriteRedisModuleKey(ctx, argv[1], CrdtHash);
int deleted = 0;
if(moduleKey == NULL) {
status = CRDT_ERROR;
goto end;
}
CrdtTombstone* t = getTombstone(moduleKey);
CRDT_HashTombstone* tombstone = NULL;
if(t != NULL && isCrdtHashTombstone(t)) {
tombstone = retrieveCrdtHashTombstone(t);
int result = compareCrdtHashTombstone(tombstone, meta);
if(isConflictCommon(result)) {
RedisModule_IncrCrdtConflict(DEL_CONFLICT | MODIFYCONFLICT);
}
if(result > COMPARE_META_VECTORCLOCK_GT) {
goto end;
}
}
if(tombstone == NULL) {
tombstone = createCrdtHashTombstone();
RedisModule_ModuleTombstoneSetValue(moduleKey, CrdtHashTombstone, tombstone);
}
CRDT_Hash* current = getCurrentValue(moduleKey);
if(current != NULL && !isCrdtHash(current)) {
const char* keyStr = RedisModule_StringPtrLen(argv[1], NULL);
RedisModule_Log(ctx, CRDT_DEBUG_LOG_LEVEL, "[CRDT_RemHashCommand][CONFLICT][CRDT-HASH][type conflict] key:{%s} prev: {%s} ",
keyStr ,current->type);
RedisModule_IncrCrdtConflict(MODIFYCONFLICT | TYPECONFLICT);
RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
status = CRDT_ERROR;
goto end;
}
int keyremoved = CRDT_NO;
int conflict = 0;
for (int i = 5; i < argc; i++) {
sds field = RedisModule_GetSds(argv[i]);
CrdtMeta* meta_copy = dupMeta(meta);
if(current != NULL) {
dictEntry* de = dictFind(current->map, field);
if(de != NULL) {
CRDT_Register* value = dictGetVal(de);
int result = compareCrdtRegisterAndDelMeta(value, meta_copy);
if(isConflictCommon(result)) {
RedisModule_IncrCrdtConflict(SET_DEL_CONFLICT | MODIFYCONFLICT);
}
if(result > COMPARE_META_EQUAL) {
if(result > COMPARE_META_VECTORCLOCK_GT) {
appendCrdtMeta(meta_copy, getCrdtRegisterLastMeta(value));
}
dictDelete(current->map, field);
deleted++;
} else {
appendCrdtMeta(getCrdtRegisterLastMeta(value), meta_copy);
freeCrdtMeta(meta_copy);
continue;
}
}
}
int compare = 0;
dictEntry* tde = dictFind(tombstone->map, field);
if(tde == NULL) {
addTombstone(tombstone, field, meta_copy, &compare);
} else {
CRDT_RegisterTombstone* tkv = dictGetVal(tde);
compare = compareCrdtMeta(getCrdtRegisterTombstoneMeta(tkv), meta_copy);
appendCrdtMeta(getCrdtRegisterTombstoneMeta(tkv), meta_copy);
}
if(isConflictCommon(compare)) conflict++;
freeCrdtMeta(meta_copy);
}
if(conflict > 0) {
RedisModule_IncrCrdtConflict(MODIFYCONFLICT | DEL_CONFLICT);
}
changeCrdtHashTombstone(tombstone, meta);
if(current != NULL) {
if (dictSize(current->map) == 0) {
RedisModule_DeleteKey(moduleKey);
keyremoved = CRDT_OK;
} else {
if(deleted > 0) { changeCrdtHash(current, meta);}
if(crdtHtNeedsResize(current->map)) dictResize(current->map);
}
}
RedisModule_MergeVectorClock(getMetaGid(meta), getMetaVectorClockToLongLong(meta));
RedisModule_NotifyKeyspaceEvent(ctx, REDISMODULE_NOTIFY_HASH, "hdel", argv[1]);
if(keyremoved == CRDT_OK) {
RedisModule_NotifyKeyspaceEvent(ctx, REDISMODULE_NOTIFY_GENERIC, "del", argv[1]);
}
end:
if(meta) {
RedisModule_CrdtReplicateVerbatim(getMetaGid(meta), ctx);
freeCrdtMeta(meta);
}
if(moduleKey) RedisModule_CloseKey(moduleKey);
if (status == CRDT_OK) {
return RedisModule_ReplyWithLongLong(ctx, deleted);
}else{
return CRDT_ERROR;
}
}
int genericHgetallCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc, int flags) {
if(argc != 2) return RedisModule_WrongArity(ctx);