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ctrip_crdt_expire.c
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ctrip_crdt_expire.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.
*/
#include "crdt_register.h"
#include <string.h>
const char* crdt_expireat_head = "*6\r\n$11\r\nCRDT.EXPIRE\r\n";
//CRDT.EXPIRE key gid time expireTime type
const size_t crdt_expireat_basic_str_len = 23 + REPLICATION_MAX_STR_LEN + REPLICATION_MAX_GID_LEN + REPLICATION_MAX_LONGLONG_LEN * 3;
size_t replicationFeedCrdtExpireAtCommand(RedisModuleCtx* ctx, char* cmdbuf, const char* keystr, size_t keylen, int gid, long long nowTime, long long expireTime, int dataType) {
size_t cmdlen = 0;
static size_t crdt_expireat_head_str_len = 0;
if(crdt_expireat_head_str_len == 0) {
crdt_expireat_head_str_len = strlen(crdt_expireat_head);
}
cmdlen += feedBuf(cmdbuf + cmdlen, crdt_expireat_head, crdt_expireat_head_str_len);
cmdlen += feedStr2Buf(cmdbuf + cmdlen, keystr, keylen);
cmdlen += feedGid2Buf(cmdbuf + cmdlen, gid);
cmdlen += feedLongLong2Buf(cmdbuf + cmdlen, nowTime);
cmdlen += feedLongLong2Buf(cmdbuf + cmdlen, expireTime);
cmdlen += feedLongLong2Buf(cmdbuf + cmdlen, dataType);
RedisModule_ReplicationFeedStringToAllSlaves(RedisModule_GetSelectedDb(ctx), cmdbuf, cmdlen);
return cmdlen;
}
int expireAt(RedisModuleCtx* ctx, RedisModuleString *key, long long expireTime) {
RedisModuleKey *moduleKey = RedisModule_OpenKey(ctx, key, REDISMODULE_WRITE);
CrdtData *data = NULL;
int type = RedisModule_KeyType(moduleKey);
int result = 0;
if(type != REDISMODULE_KEYTYPE_EMPTY) {
data = RedisModule_ModuleTypeGetValue(moduleKey);
if (data == NULL) {
goto end;
}
} else {
goto end;
}
if (RedisModule_SetExpireAt(moduleKey, expireTime) == REDISMODULE_OK) {
result = CRDT_OK;
}
end:
if(data != NULL) {
size_t keylen = 0;
const char* keystr = RedisModule_StringPtrLen(key, &keylen);
size_t alllen = keylen + crdt_expireat_basic_str_len;
char* cmdbuf = RedisModule_GetSharedBuffer(alllen);
if(cmdbuf == NULL) {
cmdbuf = RedisModule_Alloc(alllen);
replicationFeedCrdtExpireAtCommand(ctx, cmdbuf, keystr, keylen, RedisModule_CurrentGid(), RedisModule_Milliseconds(), expireTime, (long long)(getDataType(data)));
RedisModule_Free(cmdbuf);
} else {
replicationFeedCrdtExpireAtCommand(ctx, cmdbuf, keystr, keylen, RedisModule_CurrentGid(), RedisModule_Milliseconds(), expireTime, (long long)(getDataType(data)));
RedisModule_ReturnSharedBuffer(cmdbuf);
}
// RedisModule_CrdtReplicateAlsoNormReplicate(ctx, "CRDT.EXPIRE", "sllll", key, RedisModule_CurrentGid(), RedisModule_Milliseconds(), expireTime, (long long)(getDataType(data)));
}
if(moduleKey != NULL) RedisModule_CloseKey(moduleKey);
return RedisModule_ReplyWithLongLong(ctx, result);
}
int expireAtCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 3) return RedisModule_WrongArity(ctx);
long long time;
if ((RedisModule_StringToLongLong(argv[2],&time) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR value is not an integer or out of range");
}
return expireAt(ctx, argv[1], time * 1000);
}
int pexpireAtCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 3) return RedisModule_WrongArity(ctx);
long long time;
if ((RedisModule_StringToLongLong(argv[2],&time) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR value is not an integer or out of range");
}
return expireAt(ctx, argv[1], time);
}
int trySetExpire(RedisModuleKey* moduleKey, RedisModuleString* key, long long time, int type, long long expireTime) {
CrdtData* data = RedisModule_ModuleTypeGetValue(moduleKey);
if(data == NULL) {
return CRDT_ERROR;
}
if(getDataType(data) != type) {
return CRDT_ERROR;
}
if(expireTime == -1) {
RedisModule_SetExpire(moduleKey, REDISMODULE_NO_EXPIRE);
return CRDT_OK;
}
if(type == CRDT_REGISTER_TYPE) {
long long t = getCrdtRegisterLastTimestamp(data);
if(t > time) {
return CRDT_ERROR;
}
}
long long et = RedisModule_GetExpire(moduleKey);
//select the maximum
if((expireTime - RedisModule_Milliseconds()) > et) {
RedisModule_SetExpireAt(moduleKey, expireTime);
}
return CRDT_OK;
}
//expire <key> <time>
int expireCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 3) return RedisModule_WrongArity(ctx);
long long time;
if ((RedisModule_StringToLongLong(argv[2],&time) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR value is not an integer or out of range");
}
return expireAt(ctx, argv[1], RedisModule_Milliseconds() + time * 1000);
}
int pexpireCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 3) return RedisModule_WrongArity(ctx);
long long time;
if ((RedisModule_StringToLongLong(argv[2],&time) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR value is not an integer or out of range");
}
return expireAt(ctx, argv[1], RedisModule_Milliseconds() + time);
}
//CRDT.EXPIRE key gid time expireTime type
int crdtExpireCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 6) return RedisModule_WrongArity(ctx);
long long expireTime;
long long gid;
if ((RedisModule_StringToLongLong(argv[2],&gid) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR invalid value: gid must be a signed 64 bit integer");
}
long long time;
if ((RedisModule_StringToLongLong(argv[3],&time) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR invalid value: time must be a signed 64 bit integer");
}
if ((RedisModule_StringToLongLong(argv[4],&expireTime) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR invalid value: expireTime must be a signed 64 bit integer");
}
long long type;
if ((RedisModule_StringToLongLong(argv[5],&type) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR invalid value: type must be a signed 64 bit integer");
}
RedisModuleKey* moduleKey = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);
trySetExpire(moduleKey, argv[1], time, type, expireTime);
if(moduleKey != NULL) {
RedisModule_CrdtReplicateVerbatim(gid, ctx);
}
if(moduleKey != NULL) RedisModule_CloseKey(moduleKey);
return RedisModule_ReplyWithLongLong(ctx, 0);
}
//PERSIST key
int persistCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 2) return RedisModule_WrongArity(ctx);
CrdtData* data = NULL;
int result = 0;
RedisModuleKey *moduleKey = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);
if(moduleKey != NULL) {
if (RedisModule_KeyType(moduleKey) != REDISMODULE_KEYTYPE_EMPTY) {
data = RedisModule_ModuleTypeGetValue(moduleKey);
if(data == NULL) {
goto end;
}
}
}
long long et = RedisModule_GetExpire(moduleKey);
if(et == REDISMODULE_NO_EXPIRE) {
goto end;
}
if (RedisModule_SetExpire(moduleKey, REDISMODULE_NO_EXPIRE) == REDISMODULE_OK) {
result = 1;
}
RedisModule_ReplicationFeedAllSlaves(RedisModule_GetSelectedDb(ctx), "CRDT.persist", "sll", argv[1], RedisModule_CurrentGid() , (long long )getDataType(data));
end:
if(moduleKey != NULL) RedisModule_CloseKey(moduleKey);
return RedisModule_ReplyWithLongLong(ctx, result);
}
//CRDT.PERSIST key gid type
int crdtPersistCommand(RedisModuleCtx* ctx, RedisModuleString **argv, int argc) {
RedisModule_AutoMemory(ctx);
if (argc < 4) return RedisModule_WrongArity(ctx);
long long dataType;
if ((RedisModule_StringToLongLong(argv[3],&dataType) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR invalid value: must be a signed 64 bit integer");
}
long long gid;
if ((RedisModule_StringToLongLong(argv[2],&gid) != REDISMODULE_OK)) {
return RedisModule_ReplyWithError(ctx,"ERR invalid gid: must be a signed 64 bit integer");
}
CrdtData* data = NULL;
RedisModuleKey *moduleKey = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);
int result = 0;
if(moduleKey != NULL) {
if (RedisModule_KeyType(moduleKey) != REDISMODULE_KEYTYPE_EMPTY) {
data = RedisModule_ModuleTypeGetValue(moduleKey);
if(data == NULL) {
goto end;
}
} else {
goto end;
}
}
if(getDataType(data) != dataType) {
goto end;
}
if (RedisModule_SetExpire(moduleKey, REDISMODULE_NO_EXPIRE) == REDISMODULE_OK) {
result = 1;
}
end:
RedisModule_CrdtReplicateVerbatim(gid, ctx);
if(moduleKey != NULL) RedisModule_CloseKey(moduleKey);
return RedisModule_ReplyWithLongLong(ctx, result);
}
int initCrdtExpireModule(RedisModuleCtx *ctx) {
if (RedisModule_CreateCommand(ctx, "EXPIRE",
expireCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_CreateCommand(ctx, "PEXPIRE",
pexpireCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_CreateCommand(ctx, "EXPIREAT",
expireAtCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_CreateCommand(ctx, "PEXPIREAT",
pexpireAtCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_CreateCommand(ctx, "PERSIST",
persistCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_CreateCommand(ctx, "CRDT.EXPIRE",
crdtExpireCommand, "write deny-oom allow-loading", 1, 1, 1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx, "CRDT.PERSIST",
crdtPersistCommand, "write deny-oom allow-loading", 1, 1, 1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
return REDISMODULE_OK;
}