int olt_jar(ol_transaction *tx, const char *key, size_t klen, const unsigned char *value, size_t vsize) {
int ret;
char _key[KEY_SIZE] = {'\0'};
size_t _klen = 0;
ol_database *db = tx->transaction_db;
ol_bucket *bucket = ol_get_bucket(db, key, klen, &_key, &_klen);
check(_klen > 0, "Key length of zero not allowed.");
/* We only want to hit this codepath within the same database, otherwise
* weird stuff happens. Like fires and stuff.
*/
if (bucket != NULL) {
/* Flag the transaction as dirty. */
tx->dirty = 1;
return _ol_reallocate_bucket(db, bucket, value, vsize);
}
/* Looks like we don't have an old hash */
ol_bucket *new_bucket = calloc(1, sizeof(ol_bucket));
if (new_bucket == NULL)
return OL_FAILURE;
/* copy _key into new bucket */
new_bucket->key = malloc(_klen + 1);
check_mem(new_bucket->key);
new_bucket->key[_klen] = '\0';
if (strncpy(new_bucket->key, _key, _klen) != new_bucket->key) {
free(new_bucket);
return OL_FAILURE;
}
new_bucket->klen = _klen;
new_bucket->original_size = vsize;
/* Compute the new position of the data in the values file: */
const size_t new_offset = db->val_size;
if (db->state != OL_S_STARTUP) {
unsigned char *new_data_ptr = NULL;
if (db->is_enabled(OL_F_LZ4, &db->feature_set)) {
/* Compress using LZ4 if enabled */
int maxoutsize = LZ4_compressBound(vsize);
_ol_ensure_values_file_size(db, maxoutsize);
new_data_ptr = db->values + db->val_size;
memset(new_data_ptr, '\0', maxoutsize);
/* All these f*****g casts */
size_t cmsize = (size_t)LZ4_compress((char*)value, (char*)new_data_ptr,
(int)vsize);
if (cmsize == 0) {
/* Free allocated data */
free(new_bucket);
return OL_FAILURE;
}
new_bucket->data_size = cmsize;
} else {
new_bucket->data_size = vsize;
_ol_ensure_values_file_size(db, new_bucket->data_size);
new_data_ptr = db->values + db->val_size;
memset(new_data_ptr, '\0', new_bucket->data_size);
if (memcpy(new_data_ptr, value, vsize) != new_data_ptr) {
/* Free allocated memory since we're not going to use them */
free(new_bucket);
return OL_FAILURE;
}
}
} else {
/* We still need to set the data size, but not the actual data. */
if (db->is_enabled(OL_F_LZ4, &db->feature_set)) {
/* Since LZ4_compressBound only provides the worst case scenario
* and not what the data actually compressed to (we're replaying
* the AOL file, remember?) we have to compress it again and grab
* the amount of bytes processed.
* TODO: This is dumb. Make a function that just sets the bucket size.
* This new mythical function should also handle setting the data_offset
* of the bucket.
*/
int maxoutsize = LZ4_compressBound(vsize);
char tmp_data[maxoutsize];
/* Don't need to memset tmp_data because I don't care about it. */
size_t cmsize = (size_t)LZ4_compress((char *)value, (char *)tmp_data,
(int)vsize);
new_bucket->data_size = cmsize;
} else {
new_bucket->data_size = vsize;
}
}
/* Set the offset of the bucket before we increment it offset globally. */
new_bucket->data_offset = new_offset;
/* Remember to increment the tracked data size of the DB. */
db->val_size += new_bucket->data_size;
unsigned int bucket_max = ol_ht_bucket_max(db->cur_ht_size);
/* TODO: rehash this shit at 80% */
if (db->rcrd_cnt > 0 && db->rcrd_cnt == bucket_max) {
debug("Record count is now %i; growing hash table.", db->rcrd_cnt);
ret = _ol_grow_and_rehash_db(db);
if (ret > 0) {
ol_log_msg(LOG_ERR, "Problem rehashing DB. Error code: %i", ret);
free(new_bucket);
return OL_FAILURE;
}
}
uint32_t hash;
MurmurHash3_x86_32(_key, _klen, DEVILS_SEED, &hash);
ret = _ol_set_bucket(db, new_bucket, hash);
if(ret > 0)
ol_log_msg(LOG_ERR, "Problem inserting item: Error code: %i", ret);
if(db->is_enabled(OL_F_APPENDONLY, &db->feature_set) &&
db->state != OL_S_STARTUP) {
ol_aol_write_cmd(db, "JAR", new_bucket);
}
/* Flag the transaction as dirty. */
tx->dirty = 1;
return OL_SUCCESS;
error:
return OL_FAILURE;
}
int _ol_reallocate_bucket(ol_database *db, ol_bucket *bucket,
const unsigned char *value, size_t vsize) {
debug("Reallocating bucket.");
unsigned char *old_data_ptr = db->values + bucket->data_offset;
/* Clear out the old data in the file. */
if (db->state != OL_S_STARTUP && bucket->data_size > 0)
memset(old_data_ptr, '\0', bucket->data_size);
/* Compute the new position of the data in the values file: */
size_t new_offset = db->val_size;
unsigned char *new_data_ptr = NULL;
/* Compress using LZ4 if enabled */
size_t cmsize = 0;
int extended_value_area = 0;
if (db->is_enabled(OL_F_LZ4, &db->feature_set)) {
int maxoutsize = LZ4_compressBound(vsize);
if (maxoutsize <= bucket->data_size) {
/* We don't need to put this value at the end of the file if the
* new value is small enough. */
new_data_ptr = old_data_ptr;
new_offset = bucket->data_offset;
} else {
_ol_ensure_values_file_size(db, maxoutsize);
extended_value_area = 1;
new_data_ptr = db->values + db->val_size;
}
if (db->state != OL_S_STARTUP) {
cmsize = (size_t)LZ4_compress((char*)value, (char*)new_data_ptr,
(int)vsize);
} else {
/* We're starting up, so we don't want to actually write to the
* values file. We just want the size and stuff.
*/
int maxoutsize = LZ4_compressBound(vsize);
char tmp_data[maxoutsize];
cmsize = (size_t)LZ4_compress((char *)value, (char *)tmp_data,
(int)vsize);
}
} else {
if (vsize <= bucket->data_size) {
/* We don't need to put this value at the end of the file if the
* new value is small enough. */
new_data_ptr = old_data_ptr;
new_offset = bucket->data_offset;
} else {
_ol_ensure_values_file_size(db, vsize);
extended_value_area = 1;
new_data_ptr = db->values + db->val_size;
}
if (db->state != OL_S_STARTUP) {
/* Like above, avoid writing to the values file on startup. */
if (memcpy(new_data_ptr, value, vsize) != new_data_ptr)
return 4;
}
}
if (bucket->expiration != NULL) {
free(bucket->expiration);
bucket->expiration = NULL;
}
/* Set original_size regardless of lz4 compression. This ensures we always
* have something to write to the AOL. */
bucket->original_size = vsize;
if(db->is_enabled(OL_F_LZ4, &db->feature_set)) {
bucket->data_size = cmsize;
} else {
bucket->data_size = vsize;
}
bucket->data_offset = new_offset;
/* Remember to increment the tracked data size of the DB. */
if (extended_value_area)
db->val_size += bucket->data_size;
if(db->is_enabled(OL_F_APPENDONLY, &db->feature_set) && db->state != OL_S_STARTUP) {
ol_aol_write_cmd(db, "JAR", bucket);
}
return 0;
}
