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colosseum-near-rt-ric/setup/dbaas/redismodule/src/exstrings.c

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2021-12-08 21:17:46 +01:00
/*
* Copyright (c) 2018-2020 Nokia.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* This source code is part of the near-RT RIC (RAN Intelligent Controller)
* platform project (RICP).
*/
#include "redismodule.h"
#include <pthread.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#ifdef __UT__
#include "exstringsStub.h"
#include "commonStub.h"
#endif
/* make sure the response is not NULL or an error.
sends the error to the client and exit the current function if its */
#define ASSERT_NOERROR(r) \
if (r == NULL) { \
return RedisModule_ReplyWithError(ctx,"ERR reply is NULL"); \
} else if (RedisModule_CallReplyType(r) == REDISMODULE_REPLY_ERROR) { \
return RedisModule_ReplyWithCallReply(ctx,r); \
}
#define OBJ_OP_NO 0
#define OBJ_OP_XX (1<<1) /* OP if key exist */
#define OBJ_OP_NX (1<<2) /* OP if key not exist */
#define OBJ_OP_IE (1<<4) /* OP if equal old value */
#define OBJ_OP_NE (1<<5) /* OP if not equal old value */
#define DEF_COUNT 50
#define ZERO 0
#define MATCH_STR "MATCH"
#define COUNT_STR "COUNT"
#define SCANARGC 5
RedisModuleString *def_count_str = NULL, *match_str = NULL, *count_str = NULL, *zero_str = NULL;
typedef struct _NgetArgs {
RedisModuleString *key;
RedisModuleString *count;
} NgetArgs;
typedef struct RedisModuleBlockedClientArgs {
RedisModuleBlockedClient *bc;
NgetArgs nget_args;
} RedisModuleBlockedClientArgs;
void InitStaticVariable()
{
if (def_count_str == NULL)
def_count_str = RedisModule_CreateStringFromLongLong(NULL, DEF_COUNT);
if (match_str == NULL)
match_str = RedisModule_CreateString(NULL, MATCH_STR, sizeof(MATCH_STR));
if (count_str == NULL)
count_str = RedisModule_CreateString(NULL, COUNT_STR, sizeof(COUNT_STR));
if (zero_str == NULL)
zero_str = RedisModule_CreateStringFromLongLong(NULL, ZERO);
return;
}
int getKeyType(RedisModuleCtx *ctx, RedisModuleString *key_str)
{
RedisModuleKey *key = RedisModule_OpenKey(ctx, key_str, REDISMODULE_READ);
int type = RedisModule_KeyType(key);
RedisModule_CloseKey(key);
return type;
}
bool replyContentsEqualString(RedisModuleCallReply *reply, RedisModuleString *expected_value)
{
size_t replylen = 0, expectedlen = 0;
const char *expectedval = RedisModule_StringPtrLen(expected_value, &expectedlen);
const char *replyval = RedisModule_CallReplyStringPtr(reply, &replylen);
return replyval &&
expectedlen == replylen &&
!strncmp(expectedval, replyval, replylen);
}
typedef struct _SetParams {
RedisModuleString **key_val_pairs;
size_t length;
} SetParams;
typedef struct _PubParams {
RedisModuleString **channel_msg_pairs;
size_t length;
} PubParams;
typedef struct _DelParams {
RedisModuleString **keys;
size_t length;
} DelParams;
typedef enum _ExstringsStatus {
EXSTRINGS_STATUS_NO_ERRORS = 0,
EXSTRINGS_STATUS_ERROR_AND_REPLY_SENT,
EXSTRINGS_STATUS_NOT_SET
} ExstringsStatus;
void readNgetArgs(RedisModuleCtx *ctx, RedisModuleString **argv, int argc,
NgetArgs* nget_args, ExstringsStatus* status)
{
size_t str_len;
long long number;
if(argc == 2) {
nget_args->key = argv[1];
nget_args->count = def_count_str;
} else if (argc == 4) {
if (strcasecmp(RedisModule_StringPtrLen(argv[2], &str_len), "count")) {
RedisModule_ReplyWithError(ctx,"-ERR syntax error");
*status = EXSTRINGS_STATUS_ERROR_AND_REPLY_SENT;
return;
}
int ret = RedisModule_StringToLongLong(argv[3], &number) != REDISMODULE_OK;
if (ret != REDISMODULE_OK || number < 1) {
RedisModule_ReplyWithError(ctx,"-ERR value is not an integer or out of range");
*status = EXSTRINGS_STATUS_ERROR_AND_REPLY_SENT;
return;
}
nget_args->key = argv[1];
nget_args->count = argv[3];
} else {
/* In redis there is a bug (or undocumented feature see link)
* where calling 'RedisModule_WrongArity'
* within a blocked client will crash redis.
*
* Therefore we need to call this function to validate args
* before putting the client into blocking mode.
*
* Link to issue:
* https://github.com/antirez/redis/issues/6382
* 'If any thread tries to access the command arguments from
* within the ThreadSafeContext they will crash redis' */
RedisModule_WrongArity(ctx);
*status = EXSTRINGS_STATUS_ERROR_AND_REPLY_SENT;
return;
}
*status = EXSTRINGS_STATUS_NO_ERRORS;
return;
}
long long callReplyLongLong(RedisModuleCallReply* reply)
{
const char* cursor_str_ptr = RedisModule_CallReplyStringPtr(reply, NULL);
return strtoll(cursor_str_ptr, NULL, 10);
}
void forwardIfError(RedisModuleCtx *ctx, RedisModuleCallReply *reply, ExstringsStatus* status)
{
if (RedisModule_CallReplyType(reply) == REDISMODULE_REPLY_ERROR) {
RedisModule_ReplyWithCallReply(ctx, reply);
RedisModule_FreeCallReply(reply);
*status = EXSTRINGS_STATUS_ERROR_AND_REPLY_SENT;
}
*status = EXSTRINGS_STATUS_NO_ERRORS;
}
typedef struct _ScannedKeys {
RedisModuleString **keys;
size_t len;
} ScannedKeys;
ScannedKeys* allocScannedKeys(size_t len)
{
ScannedKeys *sk = RedisModule_Alloc(sizeof(ScannedKeys));
if (sk) {
sk->len = len;
sk->keys = RedisModule_Alloc(sizeof(RedisModuleString *)*len);
}
return sk;
}
void freeScannedKeys(RedisModuleCtx *ctx, ScannedKeys* sk)
{
if (sk) {
size_t j;
for (j = 0; j < sk->len; j++)
RedisModule_FreeString(ctx, sk->keys[j]);
RedisModule_Free(sk->keys);
}
RedisModule_Free(sk);
}
typedef struct _ScanSomeState {
RedisModuleString *key;
RedisModuleString *count;
long long cursor;
} ScanSomeState;
ScannedKeys *scanSome(RedisModuleCtx* ctx, ScanSomeState* state, ExstringsStatus* status)
{
RedisModuleString *scanargv[SCANARGC] = {NULL};
scanargv[0] = RedisModule_CreateStringFromLongLong(ctx, state->cursor);
scanargv[1] = match_str;
scanargv[2] = state->key;
scanargv[3] = count_str;
scanargv[4] = state->count;
RedisModuleCallReply *reply;
reply = RedisModule_Call(ctx, "SCAN", "v", scanargv, SCANARGC);
RedisModule_FreeString(ctx, scanargv[0]);
forwardIfError(ctx, reply, status);
if (*status == EXSTRINGS_STATUS_ERROR_AND_REPLY_SENT)
return NULL;
state->cursor = callReplyLongLong(RedisModule_CallReplyArrayElement(reply, 0));
RedisModuleCallReply *cr_keys =
RedisModule_CallReplyArrayElement(reply, 1);
size_t scanned_keys_len = RedisModule_CallReplyLength(cr_keys);
if (scanned_keys_len == 0) {
RedisModule_FreeCallReply(reply);
*status = EXSTRINGS_STATUS_NO_ERRORS;
return NULL;
}
ScannedKeys *scanned_keys = allocScannedKeys(scanned_keys_len);
if (scanned_keys == NULL) {
RedisModule_FreeCallReply(reply);
RedisModule_ReplyWithError(ctx,"-ERR Out of memory");
*status = EXSTRINGS_STATUS_ERROR_AND_REPLY_SENT;
return NULL;
}
scanned_keys->len = scanned_keys_len;
size_t j;
for (j = 0; j < scanned_keys_len; j++) {
RedisModuleString *rms = RedisModule_CreateStringFromCallReply(RedisModule_CallReplyArrayElement(cr_keys,j));
scanned_keys->keys[j] = rms;
}
RedisModule_FreeCallReply(reply);
*status = EXSTRINGS_STATUS_NO_ERRORS;
return scanned_keys;
}
inline void unlockThreadsafeContext(RedisModuleCtx *ctx, bool using_threadsafe_context)
{
if (using_threadsafe_context)
RedisModule_ThreadSafeContextUnlock(ctx);
}
inline void lockThreadsafeContext(RedisModuleCtx *ctx, bool using_threadsafe_context)
{
if (using_threadsafe_context)
RedisModule_ThreadSafeContextLock(ctx);
}
void multiPubCommand(RedisModuleCtx *ctx, PubParams* pubParams)
{
RedisModuleCallReply *reply = NULL;
for (unsigned int i = 0 ; i < pubParams->length ; i += 2) {
reply = RedisModule_Call(ctx, "PUBLISH", "v", pubParams->channel_msg_pairs + i, 2);
RedisModule_FreeCallReply(reply);
}
}
int setStringGenericCommand(RedisModuleCtx *ctx, RedisModuleString **argv,
int argc, const int flag)
{
RedisModuleString *oldvalstr = NULL;
RedisModuleCallReply *reply = NULL;
if (argc < 4)
return RedisModule_WrongArity(ctx);
else
oldvalstr = argv[3];
/*Check if key type is string*/
RedisModuleKey *key = RedisModule_OpenKey(ctx,argv[1],
REDISMODULE_READ);
int type = RedisModule_KeyType(key);
RedisModule_CloseKey(key);
if (type == REDISMODULE_KEYTYPE_EMPTY) {
if (flag == OBJ_OP_IE){
RedisModule_ReplyWithNull(ctx);
return REDISMODULE_OK;
}
} else if (type != REDISMODULE_KEYTYPE_STRING) {
return RedisModule_ReplyWithError(ctx,REDISMODULE_ERRORMSG_WRONGTYPE);
}
/*Get the value*/
reply = RedisModule_Call(ctx, "GET", "s", argv[1]);
ASSERT_NOERROR(reply)
size_t curlen=0, oldvallen=0;
const char *oldval = RedisModule_StringPtrLen(oldvalstr, &oldvallen);
const char *curval = RedisModule_CallReplyStringPtr(reply, &curlen);
if (((flag == OBJ_OP_IE) &&
(!curval || (oldvallen != curlen) || strncmp(oldval, curval, curlen)))
||
((flag == OBJ_OP_NE) && curval && (oldvallen == curlen) &&
!strncmp(oldval, curval, curlen))) {
RedisModule_FreeCallReply(reply);
return RedisModule_ReplyWithNull(ctx);
}
RedisModule_FreeCallReply(reply);
/* Prepare the arguments for the command. */
int i, j=0, cmdargc=argc-2;
RedisModuleString *cmdargv[cmdargc];
for (i = 1; i < argc; i++) {
if (i == 3)
continue;
cmdargv[j++] = argv[i];
}
/* Call the command and pass back the reply. */
reply = RedisModule_Call(ctx, "SET", "v!", cmdargv, cmdargc);
ASSERT_NOERROR(reply)
RedisModule_ReplyWithCallReply(ctx, reply);
RedisModule_FreeCallReply(reply);
return REDISMODULE_OK;
}
int SetIE_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
RedisModule_AutoMemory(ctx);
return setStringGenericCommand(ctx, argv, argc, OBJ_OP_IE);
}
int SetNE_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
RedisModule_AutoMemory(ctx);
return setStringGenericCommand(ctx, argv, argc, OBJ_OP_NE);
}
int delStringGenericCommand(RedisModuleCtx *ctx, RedisModuleString **argv,
int argc, const int flag)
{
RedisModuleString *oldvalstr = NULL;
RedisModuleCallReply *reply = NULL;
if (argc == 3)
oldvalstr = argv[2];
else
return RedisModule_WrongArity(ctx);
/*Check if key type is string*/
RedisModuleKey *key = RedisModule_OpenKey(ctx,argv[1],
REDISMODULE_READ);
int type = RedisModule_KeyType(key);
RedisModule_CloseKey(key);
if (type == REDISMODULE_KEYTYPE_EMPTY) {
return RedisModule_ReplyWithLongLong(ctx, 0);
} else if (type != REDISMODULE_KEYTYPE_STRING) {
return RedisModule_ReplyWithError(ctx,REDISMODULE_ERRORMSG_WRONGTYPE);
}
/*Get the value*/
reply = RedisModule_Call(ctx, "GET", "s", argv[1]);
ASSERT_NOERROR(reply)
size_t curlen = 0, oldvallen = 0;
const char *oldval = RedisModule_StringPtrLen(oldvalstr, &oldvallen);
const char *curval = RedisModule_CallReplyStringPtr(reply, &curlen);
if (((flag == OBJ_OP_IE) &&
(!curval || (oldvallen != curlen) || strncmp(oldval, curval, curlen)))
||
((flag == OBJ_OP_NE) && curval && (oldvallen == curlen) &&
!strncmp(oldval, curval, curlen))) {
RedisModule_FreeCallReply(reply);
return RedisModule_ReplyWithLongLong(ctx, 0);
}
RedisModule_FreeCallReply(reply);
/* Prepare the arguments for the command. */
int cmdargc=1;
RedisModuleString *cmdargv[1];
cmdargv[0] = argv[1];
/* Call the command and pass back the reply. */
reply = RedisModule_Call(ctx, "UNLINK", "v!", cmdargv, cmdargc);
ASSERT_NOERROR(reply)
RedisModule_ReplyWithCallReply(ctx, reply);
RedisModule_FreeCallReply(reply);
return REDISMODULE_OK;
}
int DelIE_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
RedisModule_AutoMemory(ctx);
return delStringGenericCommand(ctx, argv, argc, OBJ_OP_IE);
}
int DelNE_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
RedisModule_AutoMemory(ctx);
return delStringGenericCommand(ctx, argv, argc, OBJ_OP_NE);
}
int setPubStringCommon(RedisModuleCtx *ctx, SetParams* setParamsPtr, PubParams* pubParamsPtr)
{
RedisModuleCallReply *setReply;
setReply = RedisModule_Call(ctx, "MSET", "v!", setParamsPtr->key_val_pairs, setParamsPtr->length);
ASSERT_NOERROR(setReply)
multiPubCommand(ctx, pubParamsPtr);
RedisModule_ReplyWithCallReply(ctx, setReply);
RedisModule_FreeCallReply(setReply);
return REDISMODULE_OK;
}
int SetPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc < 5 || (argc % 2) == 0)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
SetParams setParams = {
.key_val_pairs = argv + 1,
.length = argc - 3
};
PubParams pubParams = {
.channel_msg_pairs = argv + 1 + setParams.length,
.length = 2
};
return setPubStringCommon(ctx, &setParams, &pubParams);
}
int SetMPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc < 7 || (argc % 2) == 0)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
long long setPairsCount, pubPairsCount;
RedisModule_StringToLongLong(argv[1], &setPairsCount);
RedisModule_StringToLongLong(argv[2], &pubPairsCount);
if (setPairsCount < 1 || pubPairsCount < 1)
return RedisModule_ReplyWithError(ctx, "ERR SET_PAIR_COUNT and PUB_PAIR_COUNT must be greater than zero");
long long setLen, pubLen;
setLen = 2*setPairsCount;
pubLen = 2*pubPairsCount;
if (setLen + pubLen + 3 != argc)
return RedisModule_ReplyWithError(ctx, "ERR SET_PAIR_COUNT or PUB_PAIR_COUNT do not match the total pair count");
SetParams setParams = {
.key_val_pairs = argv + 3,
.length = setLen
};
PubParams pubParams = {
.channel_msg_pairs = argv + 3 + setParams.length,
.length = pubLen
};
return setPubStringCommon(ctx, &setParams, &pubParams);
}
int setIENEPubStringCommon(RedisModuleCtx *ctx, RedisModuleString **argv, int argc, int flag)
{
SetParams setParams = {
.key_val_pairs = argv + 1,
.length = 2
};
PubParams pubParams = {
.channel_msg_pairs = argv + 4,
.length = argc - 4
};
RedisModuleString *key = setParams.key_val_pairs[0];
RedisModuleString *oldvalstr = argv[3];
int type = getKeyType(ctx, key);
if (flag == OBJ_OP_IE && type == REDISMODULE_KEYTYPE_EMPTY) {
return RedisModule_ReplyWithNull(ctx);
} else if (type != REDISMODULE_KEYTYPE_STRING && type != REDISMODULE_KEYTYPE_EMPTY) {
return RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
}
RedisModuleCallReply *reply = RedisModule_Call(ctx, "GET", "s", key);
ASSERT_NOERROR(reply)
bool is_equal = replyContentsEqualString(reply, oldvalstr);
RedisModule_FreeCallReply(reply);
if ((flag == OBJ_OP_IE && !is_equal) ||
(flag == OBJ_OP_NE && is_equal)) {
return RedisModule_ReplyWithNull(ctx);
}
return setPubStringCommon(ctx, &setParams, &pubParams);
}
int SetIEPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 6)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return setIENEPubStringCommon(ctx, argv, argc, OBJ_OP_IE);
}
int SetIEMPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc < 6 || (argc % 2) != 0)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return setIENEPubStringCommon(ctx, argv, argc, OBJ_OP_IE);
}
int SetNEPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 6)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return setIENEPubStringCommon(ctx, argv, argc, OBJ_OP_NE);
}
int setXXNXPubStringCommon(RedisModuleCtx *ctx, RedisModuleString **argv, int argc, int flag)
{
SetParams setParams = {
.key_val_pairs = argv + 1,
.length = 2
};
PubParams pubParams = {
.channel_msg_pairs = argv + 3,
.length = argc - 3
};
RedisModuleString *key = setParams.key_val_pairs[0];
int type = getKeyType(ctx, key);
if ((flag == OBJ_OP_XX && type == REDISMODULE_KEYTYPE_EMPTY) ||
(flag == OBJ_OP_NX && type == REDISMODULE_KEYTYPE_STRING)) {
return RedisModule_ReplyWithNull(ctx);
} else if (type != REDISMODULE_KEYTYPE_STRING && type != REDISMODULE_KEYTYPE_EMPTY) {
RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
return REDISMODULE_OK;
}
return setPubStringCommon(ctx, &setParams, &pubParams);
}
int SetNXPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 5)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return setXXNXPubStringCommon(ctx, argv, argc, OBJ_OP_NX);
}
int SetNXMPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc < 5 || (argc % 2) == 0)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return setXXNXPubStringCommon(ctx, argv, argc, OBJ_OP_NX);
}
int SetXXPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 5)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return setXXNXPubStringCommon(ctx, argv, argc, OBJ_OP_XX);
}
int delPubStringCommon(RedisModuleCtx *ctx, DelParams *delParamsPtr, PubParams *pubParamsPtr)
{
RedisModuleCallReply *reply = RedisModule_Call(ctx, "UNLINK", "v!", delParamsPtr->keys, delParamsPtr->length);
ASSERT_NOERROR(reply)
int replytype = RedisModule_CallReplyType(reply);
if (replytype == REDISMODULE_REPLY_NULL) {
RedisModule_ReplyWithNull(ctx);
} else if (RedisModule_CallReplyInteger(reply) == 0) {
RedisModule_ReplyWithCallReply(ctx, reply);
} else {
RedisModule_ReplyWithCallReply(ctx, reply);
multiPubCommand(ctx, pubParamsPtr);
}
RedisModule_FreeCallReply(reply);
return REDISMODULE_OK;
}
int DelPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc < 4)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
DelParams delParams = {
.keys = argv + 1,
.length = argc - 3
};
PubParams pubParams = {
.channel_msg_pairs = argv + 1 + delParams.length,
.length = 2
};
return delPubStringCommon(ctx, &delParams, &pubParams);
}
int DelMPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc < 6)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
long long delCount, pubPairsCount;
RedisModule_StringToLongLong(argv[1], &delCount);
RedisModule_StringToLongLong(argv[2], &pubPairsCount);
if (delCount < 1 || pubPairsCount < 1)
return RedisModule_ReplyWithError(ctx, "ERR DEL_COUNT and PUB_PAIR_COUNT must be greater than zero");
long long delLen, pubLen;
delLen = delCount;
pubLen = 2*pubPairsCount;
if (delLen + pubLen + 3 != argc)
return RedisModule_ReplyWithError(ctx, "ERR DEL_COUNT or PUB_PAIR_COUNT do not match the total pair count");
DelParams delParams = {
.keys = argv + 3,
.length = delLen
};
PubParams pubParams = {
.channel_msg_pairs = argv + 3 + delParams.length,
.length = pubLen
};
return delPubStringCommon(ctx, &delParams, &pubParams);
}
int delIENEPubStringCommon(RedisModuleCtx *ctx, RedisModuleString **argv, int argc, int flag)
{
DelParams delParams = {
.keys = argv + 1,
.length = 1
};
PubParams pubParams = {
.channel_msg_pairs = argv + 3,
.length = argc - 3
};
RedisModuleString *key = argv[1];
RedisModuleString *oldvalstr = argv[2];
int type = getKeyType(ctx, key);
if (type == REDISMODULE_KEYTYPE_EMPTY) {
return RedisModule_ReplyWithLongLong(ctx, 0);
} else if (type != REDISMODULE_KEYTYPE_STRING) {
return RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
}
RedisModuleCallReply *reply = RedisModule_Call(ctx, "GET", "s", key);
ASSERT_NOERROR(reply)
bool is_equal = replyContentsEqualString(reply, oldvalstr);
RedisModule_FreeCallReply(reply);
if ((flag == OBJ_OP_IE && !is_equal) ||
(flag == OBJ_OP_NE && is_equal)) {
return RedisModule_ReplyWithLongLong(ctx, 0);
}
return delPubStringCommon(ctx, &delParams, &pubParams);
}
int DelIEPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 5)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return delIENEPubStringCommon(ctx, argv, argc, OBJ_OP_IE);
}
int DelIEMPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc < 5 || (argc % 2) == 0)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return delIENEPubStringCommon(ctx, argv, argc, OBJ_OP_IE);
}
int DelNEPub_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 5)
return RedisModule_WrongArity(ctx);
RedisModule_AutoMemory(ctx);
return delIENEPubStringCommon(ctx, argv, argc, OBJ_OP_NE);
}
int Nget_RedisCommand(RedisModuleCtx *ctx, NgetArgs* nget_args, bool using_threadsafe_context)
{
int ret = REDISMODULE_OK;
size_t replylen = 0;
RedisModuleCallReply *reply = NULL;
ExstringsStatus status = EXSTRINGS_STATUS_NOT_SET;
ScanSomeState scan_state;
ScannedKeys *scanned_keys;
scan_state.key = nget_args->key;
scan_state.count = nget_args->count;
scan_state.cursor = 0;
RedisModule_ReplyWithArray(ctx, REDISMODULE_POSTPONED_ARRAY_LEN);
do {
lockThreadsafeContext(ctx, using_threadsafe_context);
status = EXSTRINGS_STATUS_NOT_SET;
scanned_keys = scanSome(ctx, &scan_state, &status);
if (status != EXSTRINGS_STATUS_NO_ERRORS) {
unlockThreadsafeContext(ctx, using_threadsafe_context);
ret = REDISMODULE_ERR;
break;
} else if (scanned_keys == NULL) {
unlockThreadsafeContext(ctx, using_threadsafe_context);
continue;
}
reply = RedisModule_Call(ctx, "MGET", "v", scanned_keys->keys, scanned_keys->len);
unlockThreadsafeContext(ctx, using_threadsafe_context);
status = EXSTRINGS_STATUS_NOT_SET;
forwardIfError(ctx, reply, &status);
if (status != EXSTRINGS_STATUS_NO_ERRORS) {
freeScannedKeys(ctx, scanned_keys);
ret = REDISMODULE_ERR;
break;
}
size_t i;
for (i = 0; i < scanned_keys->len; i++) {
RedisModuleString *rms = RedisModule_CreateStringFromCallReply(RedisModule_CallReplyArrayElement(reply, i));
if (rms) {
RedisModule_ReplyWithString(ctx, scanned_keys->keys[i]);
RedisModule_ReplyWithString(ctx, rms);
RedisModule_FreeString(ctx, rms);
replylen += 2;
}
}
RedisModule_FreeCallReply(reply);
freeScannedKeys(ctx, scanned_keys);
} while (scan_state.cursor != 0);
RedisModule_ReplySetArrayLength(ctx,replylen);
return ret;
}
/* The thread entry point that actually executes the blocking part
* of the command nget.noatomic
*/
void *NGet_NoAtomic_ThreadMain(void *arg)
{
pthread_detach(pthread_self());
RedisModuleBlockedClientArgs *bca = arg;
RedisModuleBlockedClient *bc = bca->bc;
RedisModuleCtx *ctx = RedisModule_GetThreadSafeContext(bc);
Nget_RedisCommand(ctx, &bca->nget_args, true);
RedisModule_FreeThreadSafeContext(ctx);
RedisModule_UnblockClient(bc, NULL);
RedisModule_Free(bca);
return NULL;
}
int NGet_NoAtomic_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
RedisModule_AutoMemory(ctx);
pthread_t tid;
InitStaticVariable();
RedisModuleBlockedClientArgs *bca = RedisModule_Alloc(sizeof(RedisModuleBlockedClientArgs));
if (bca == NULL) {
RedisModule_ReplyWithError(ctx,"-ERR Out of memory");
return REDISMODULE_ERR;
}
ExstringsStatus status = EXSTRINGS_STATUS_NOT_SET;
readNgetArgs(ctx, argv, argc, &bca->nget_args, &status);
if (status != EXSTRINGS_STATUS_NO_ERRORS) {
RedisModule_Free(bca);
return REDISMODULE_ERR;
}
/* Note that when blocking the client we do not set any callback: no
* timeout is possible since we passed '0', nor we need a reply callback
* because we'll use the thread safe context to accumulate a reply. */
RedisModuleBlockedClient *bc = RedisModule_BlockClient(ctx,NULL,NULL,NULL,0);
bca->bc = bc;
/* Now that we setup a blocking client, we need to pass the control
* to the thread. However we need to pass arguments to the thread:
* the reference to the blocked client handle. */
if (pthread_create(&tid,NULL,NGet_NoAtomic_ThreadMain,bca) != 0) {
RedisModule_AbortBlock(bc);
RedisModule_Free(bca);
return RedisModule_ReplyWithError(ctx,"-ERR Can't start thread");
}
return REDISMODULE_OK;
}
int NGet_Atomic_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
RedisModule_AutoMemory(ctx);
NgetArgs nget_args;
ExstringsStatus status = EXSTRINGS_STATUS_NOT_SET;
InitStaticVariable();
readNgetArgs(ctx, argv, argc, &nget_args, &status);
if (status != EXSTRINGS_STATUS_NO_ERRORS) {
return REDISMODULE_ERR;
}
return Nget_RedisCommand(ctx, &nget_args, false);
}
int NDel_Atomic_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
RedisModule_AutoMemory(ctx);
int ret = REDISMODULE_OK;
long long replylen = 0;
RedisModuleCallReply *reply = NULL;
ExstringsStatus status = EXSTRINGS_STATUS_NOT_SET;
ScanSomeState scan_state;
ScannedKeys *scanned_keys = NULL;
InitStaticVariable();
if (argc != 2)
return RedisModule_WrongArity(ctx);
scan_state.key = argv[1];
scan_state.count = def_count_str;
scan_state.cursor = 0;
do {
status = EXSTRINGS_STATUS_NOT_SET;
scanned_keys = scanSome(ctx, &scan_state, &status);
if (status != EXSTRINGS_STATUS_NO_ERRORS) {
ret = REDISMODULE_ERR;
break;
} else if (scanned_keys == NULL) {
continue;
}
reply = RedisModule_Call(ctx, "UNLINK", "v!", scanned_keys->keys, scanned_keys->len);
status = EXSTRINGS_STATUS_NOT_SET;
forwardIfError(ctx, reply, &status);
if (status != EXSTRINGS_STATUS_NO_ERRORS) {
freeScannedKeys(ctx, scanned_keys);
ret = REDISMODULE_ERR;
break;
}
replylen += RedisModule_CallReplyInteger(reply);
RedisModule_FreeCallReply(reply);
freeScannedKeys(ctx, scanned_keys);
} while (scan_state.cursor != 0);
if (ret == REDISMODULE_OK) {
RedisModule_ReplyWithLongLong(ctx, replylen);
}
return ret;
}
/* This function must be present on each Redis module. It is used in order to
* register the commands into the Redis server. */
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
if (RedisModule_Init(ctx,"exstrings",1,REDISMODULE_APIVER_1)
== REDISMODULE_ERR) return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setie",
SetIE_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setne",
SetNE_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"delie",
DelIE_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"delne",
DelNE_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"nget.atomic",
NGet_Atomic_RedisCommand,"readonly",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"nget.noatomic",
NGet_NoAtomic_RedisCommand,"readonly",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"ndel.atomic",
NDel_Atomic_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"msetpub",
SetPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"msetmpub",
SetMPub_RedisCommand,"write deny-oom pubsub",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setiepub",
SetIEPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setiempub",
SetIEMPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setnepub",
SetNEPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setxxpub",
SetXXPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setnxpub",
SetNXPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"setnxmpub",
SetNXMPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"delpub",
DelPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"delmpub",
DelMPub_RedisCommand,"write deny-oom pubsub",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"deliepub",
DelIEPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"deliempub",
DelIEMPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"delnepub",
DelNEPub_RedisCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
return REDISMODULE_OK;
}
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