49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h> // sysconf() - get CPU count
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#include "rocksdb/c.h"
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// const char DBPath[] = "/tmp/rocksdb_c_simple_example";
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const char DBPath[] = "rocksdb_c_simple_example";
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const char DBBackupPath[] = "/tmp/rocksdb_c_simple_example_backup";
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int main(int argc, char const *argv[]) {
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rocksdb_t * db;
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rocksdb_backup_engine_t *be;
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rocksdb_options_t * options = rocksdb_options_create();
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rocksdb_options_set_create_if_missing(options, 1);
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// open DB
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char *err = NULL;
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db = rocksdb_open(options, DBPath, &err);
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// Write
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rocksdb_writeoptions_t *writeoptions = rocksdb_writeoptions_create();
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rocksdb_put(db, writeoptions, "key", 3, "value", 5, &err);
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// Read
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rocksdb_readoptions_t *readoptions = rocksdb_readoptions_create();
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//rocksdb_readoptions_set_snapshot(readoptions, rocksdb_create_snapshot(db));
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char buf[256] = {0};
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size_t vallen = 0;
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char * val = rocksdb_get(db, readoptions, "key", 3, &vallen, &err);
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snprintf(buf, vallen+5, "val:%s", val);
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printf("%ld %ld %s\n", strlen(val), vallen, buf);
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// Update
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// rocksdb_put(db, writeoptions, "key", 3, "eulav", 5, &err);
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// Delete
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rocksdb_delete(db, writeoptions, "key", 3, &err);
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// Read again
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val = rocksdb_get(db, readoptions, "key", 3, &vallen, &err);
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printf("val:%s\n", val);
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rocksdb_close(db);
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return 0;
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}
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