homework-jianmu/contrib/test/rocksdb/main.c

317 lines
11 KiB
C

#include <assert.h>
#include <bits/stdint-uintn.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h> // sysconf() - get CPU count
#include "rocksdb/c.h"
// const char DBPath[] = "/tmp/rocksdb_c_simple_example";
const char DBPath[] = "rocksdb_c_simple_example";
const char DBBackupPath[] = "/tmp/rocksdb_c_simple_example_backup";
static const int32_t endian_test_var = 1;
#define IS_LITTLE_ENDIAN() (*(uint8_t *)(&endian_test_var) != 0)
#define TD_RT_ENDIAN() (IS_LITTLE_ENDIAN() ? TD_LITTLE_ENDIAN : TD_BIG_ENDIAN)
#define POINTER_SHIFT(p, b) ((void *)((char *)(p) + (b)))
static void *taosDecodeFixedU64(const void *buf, uint64_t *value) {
if (IS_LITTLE_ENDIAN()) {
memcpy(value, buf, sizeof(*value));
} else {
((uint8_t *)value)[7] = ((uint8_t *)buf)[0];
((uint8_t *)value)[6] = ((uint8_t *)buf)[1];
((uint8_t *)value)[5] = ((uint8_t *)buf)[2];
((uint8_t *)value)[4] = ((uint8_t *)buf)[3];
((uint8_t *)value)[3] = ((uint8_t *)buf)[4];
((uint8_t *)value)[2] = ((uint8_t *)buf)[5];
((uint8_t *)value)[1] = ((uint8_t *)buf)[6];
((uint8_t *)value)[0] = ((uint8_t *)buf)[7];
}
return POINTER_SHIFT(buf, sizeof(*value));
}
// ---- Fixed U64
static int32_t taosEncodeFixedU64(void **buf, uint64_t value) {
if (buf != NULL) {
if (IS_LITTLE_ENDIAN()) {
memcpy(*buf, &value, sizeof(value));
} else {
((uint8_t *)(*buf))[0] = value & 0xff;
((uint8_t *)(*buf))[1] = (value >> 8) & 0xff;
((uint8_t *)(*buf))[2] = (value >> 16) & 0xff;
((uint8_t *)(*buf))[3] = (value >> 24) & 0xff;
((uint8_t *)(*buf))[4] = (value >> 32) & 0xff;
((uint8_t *)(*buf))[5] = (value >> 40) & 0xff;
((uint8_t *)(*buf))[6] = (value >> 48) & 0xff;
((uint8_t *)(*buf))[7] = (value >> 56) & 0xff;
}
*buf = POINTER_SHIFT(*buf, sizeof(value));
}
return (int32_t)sizeof(value);
}
typedef struct KV {
uint64_t k1;
uint64_t k2;
} KV;
int kvSerial(KV *kv, char *buf) {
int len = 0;
len += taosEncodeFixedU64((void **)&buf, kv->k1);
len += taosEncodeFixedU64((void **)&buf, kv->k2);
return len;
}
const char *kvDBName(void *name) { return "kvDBname"; }
int kvDBComp(void *state, const char *aBuf, size_t aLen, const char *bBuf, size_t bLen) {
KV w1, w2;
memset(&w1, 0, sizeof(w1));
memset(&w2, 0, sizeof(w2));
char *p1 = (char *)aBuf;
char *p2 = (char *)bBuf;
// p1 += 1;
// p2 += 1;
p1 = taosDecodeFixedU64(p1, &w1.k1);
p2 = taosDecodeFixedU64(p2, &w2.k1);
p1 = taosDecodeFixedU64(p1, &w1.k2);
p2 = taosDecodeFixedU64(p2, &w2.k2);
if (w1.k1 < w2.k1) {
return -1;
} else if (w1.k1 > w2.k1) {
return 1;
}
if (w1.k2 < w2.k2) {
return -1;
} else if (w1.k2 > w2.k2) {
return 1;
}
return 0;
}
int kvDeserial(KV *kv, char *buf) {
char *p1 = (char *)buf;
// p1 += 1;
p1 = taosDecodeFixedU64(p1, &kv->k1);
p1 = taosDecodeFixedU64(p1, &kv->k2);
return 0;
}
int main(int argc, char const *argv[]) {
rocksdb_t *db;
rocksdb_backup_engine_t *be;
char *err = NULL;
const char *path = "/tmp/db";
rocksdb_options_t *opt = rocksdb_options_create();
rocksdb_options_set_create_if_missing(opt, 1);
rocksdb_options_set_create_missing_column_families(opt, 1);
// Read
rocksdb_readoptions_t *readoptions = rocksdb_readoptions_create();
// rocksdb_readoptions_set_snapshot(readoptions, rocksdb_create_snapshot(db));
int len = 1;
char buf[256] = {0};
size_t vallen = 0;
char *val = rocksdb_get(db, readoptions, "key", 3, &vallen, &err);
snprintf(buf, vallen + 5, "val:%s", val);
printf("%ld %ld %s\n", strlen(val), vallen, buf);
char **cfName = calloc(len, sizeof(char *));
for (int i = 0; i < len; i++) {
cfName[i] = "test";
}
const rocksdb_options_t **cfOpt = malloc(len * sizeof(rocksdb_options_t *));
for (int i = 0; i < len; i++) {
cfOpt[i] = rocksdb_options_create_copy(opt);
if (i != 0) {
rocksdb_comparator_t *comp = rocksdb_comparator_create(NULL, NULL, kvDBComp, kvDBName);
rocksdb_options_set_comparator((rocksdb_options_t *)cfOpt[i], comp);
}
}
rocksdb_column_family_handle_t **cfHandle = malloc(len * sizeof(rocksdb_column_family_handle_t *));
db = rocksdb_open_column_families(opt, path, len, (const char *const *)cfName, cfOpt, cfHandle, &err);
{
rocksdb_readoptions_t *rOpt = rocksdb_readoptions_create();
size_t vlen = 0;
char *v = rocksdb_get_cf(db, rOpt, cfHandle[0], "key", strlen("key"), &vlen, &err);
printf("Get value %s, and len = %d\n", v, (int)vlen);
}
rocksdb_writeoptions_t *wOpt = rocksdb_writeoptions_create();
rocksdb_writebatch_t *wBatch = rocksdb_writebatch_create();
rocksdb_writebatch_put_cf(wBatch, cfHandle[0], "key", strlen("key"), "value", strlen("value"));
rocksdb_write(db, wOpt, wBatch, &err);
rocksdb_readoptions_t *rOpt = rocksdb_readoptions_create();
size_t vlen = 0;
{
rocksdb_writeoptions_t *wOpt = rocksdb_writeoptions_create();
rocksdb_writebatch_t *wBatch = rocksdb_writebatch_create();
for (int i = 0; i < 100; i++) {
char buf[128] = {0};
KV kv = {.k1 = (100 - i) % 26, .k2 = i % 26};
kvSerial(&kv, buf);
rocksdb_writebatch_put_cf(wBatch, cfHandle[1], buf, sizeof(kv), "value", strlen("value"));
}
rocksdb_write(db, wOpt, wBatch, &err);
}
{
{
char buf[128] = {0};
KV kv = {.k1 = 0, .k2 = 0};
kvSerial(&kv, buf);
char *v = rocksdb_get_cf(db, rOpt, cfHandle[1], buf, sizeof(kv), &vlen, &err);
printf("Get value %s, and len = %d, xxxx\n", v, (int)vlen);
rocksdb_iterator_t *iter = rocksdb_create_iterator_cf(db, rOpt, cfHandle[1]);
rocksdb_iter_seek_to_first(iter);
int i = 0;
while (rocksdb_iter_valid(iter)) {
size_t klen, vlen;
const char *key = rocksdb_iter_key(iter, &klen);
const char *value = rocksdb_iter_value(iter, &vlen);
KV kv;
kvDeserial(&kv, (char *)key);
printf("kv1: %d\t kv2: %d, len:%d, value = %s\n", (int)(kv.k1), (int)(kv.k2), (int)(klen), value);
i++;
rocksdb_iter_next(iter);
}
rocksdb_iter_destroy(iter);
}
{
char buf[128] = {0};
KV kv = {.k1 = 0, .k2 = 0};
int len = kvSerial(&kv, buf);
rocksdb_iterator_t *iter = rocksdb_create_iterator_cf(db, rOpt, cfHandle[1]);
rocksdb_iter_seek(iter, buf, len);
if (!rocksdb_iter_valid(iter)) {
printf("invalid iter");
}
{
char buf[128] = {0};
KV kv = {.k1 = 100, .k2 = 0};
int len = kvSerial(&kv, buf);
rocksdb_iterator_t *iter = rocksdb_create_iterator_cf(db, rOpt, cfHandle[1]);
rocksdb_iter_seek(iter, buf, len);
if (!rocksdb_iter_valid(iter)) {
printf("invalid iter\n");
rocksdb_iter_seek_for_prev(iter, buf, len);
if (!rocksdb_iter_valid(iter)) {
printf("stay invalid iter\n");
} else {
size_t klen = 0, vlen = 0;
const char *key = rocksdb_iter_key(iter, &klen);
const char *value = rocksdb_iter_value(iter, &vlen);
KV kv;
kvDeserial(&kv, (char *)key);
printf("kv1: %d\t kv2: %d, len:%d, value = %s\n", (int)(kv.k1), (int)(kv.k2), (int)(klen), value);
}
}
}
}
}
// char *v = rocksdb_get_cf(db, rOpt, cfHandle[0], "key", strlen("key"), &vlen, &err);
// printf("Get value %s, and len = %d\n", v, (int)vlen);
rocksdb_column_family_handle_destroy(cfHandle[0]);
rocksdb_column_family_handle_destroy(cfHandle[1]);
rocksdb_close(db);
// {
// // rocksdb_options_t *Options = rocksdb_options_create();
// db = rocksdb_open(comm, path, &err);
// if (db != NULL) {
// rocksdb_options_t *cfo = rocksdb_options_create_copy(comm);
// rocksdb_comparator_t *cmp1 = rocksdb_comparator_create(NULL, NULL, kvDBComp, kvDBName);
// rocksdb_options_set_comparator(cfo, cmp1);
// rocksdb_column_family_handle_t *handle = rocksdb_create_column_family(db, cfo, "cf1", &err);
// rocksdb_column_family_handle_destroy(handle);
// rocksdb_close(db);
// db = NULL;
// }
// }
// int ncf = 2;
// rocksdb_column_family_handle_t **pHandle = malloc(ncf * sizeof(rocksdb_column_family_handle_t *));
// {
// rocksdb_options_t *options = rocksdb_options_create_copy(comm);
// rocksdb_comparator_t *cmp1 = rocksdb_comparator_create(NULL, NULL, kvDBComp, kvDBName);
// rocksdb_options_t *dbOpts1 = rocksdb_options_create_copy(comm);
// rocksdb_options_t *dbOpts2 = rocksdb_options_create_copy(comm);
// rocksdb_options_set_comparator(dbOpts2, cmp1);
// // rocksdb_column_family_handle_t *cf = rocksdb_create_column_family(db, dbOpts1, "cmp1", &err);
// const char *pName[] = {"default", "cf1"};
// const rocksdb_options_t **pOpts = malloc(ncf * sizeof(rocksdb_options_t *));
// pOpts[0] = dbOpts1;
// pOpts[1] = dbOpts2;
// rocksdb_options_t *allOptions = rocksdb_options_create_copy(comm);
// db = rocksdb_open_column_families(allOptions, "test", ncf, pName, pOpts, pHandle, &err);
// }
// // rocksdb_options_t *options = rocksdb_options_create();
// // rocksdb_options_set_create_if_missing(options, 1);
// // //rocksdb_open_column_families(const rocksdb_options_t *options, const char *name, int num_column_families,
// // const char *const *column_family_names,
// // const rocksdb_options_t *const *column_family_options,
// // rocksdb_column_family_handle_t **column_family_handles, char **errptr);
// for (int i = 0; i < 100; i++) {
// char buf[128] = {0};
// rocksdb_writeoptions_t *wopt = rocksdb_writeoptions_create();
// KV kv = {.k1 = i, .k2 = i};
// kvSerial(&kv, buf);
// rocksdb_put_cf(db, wopt, pHandle[0], buf, strlen(buf), (const char *)&i, sizeof(i), &err);
// }
// rocksdb_close(db);
// Write
// rocksdb_writeoptions_t *writeoptions = rocksdb_writeoptions_create();
// rocksdb_put(db, writeoptions, "key", 3, "value", 5, &err);
//// Read
// rocksdb_readoptions_t *readoptions = rocksdb_readoptions_create();
// rocksdb_readoptions_set_snapshot(readoptions, rocksdb_create_snapshot(db));
// size_t vallen = 0;
// char *val = rocksdb_get(db, readoptions, "key", 3, &vallen, &err);
// printf("val:%s\n", val);
//// Update
//// rocksdb_put(db, writeoptions, "key", 3, "eulav", 5, &err);
//// Delete
// rocksdb_delete(db, writeoptions, "key", 3, &err);
//// Read again
// val = rocksdb_get(db, readoptions, "key", 3, &vallen, &err);
// printf("val:%s\n", val);
// rocksdb_close(db);
return 0;
}