*error= memcached_mget_by_key(ptr,
master_key,
master_key_length,
- (char **)&key, &key_length, 1);
+ (const char **)&key, &key_length, 1);
value= memcached_fetch(ptr, NULL, NULL,
value_length, flags, error);
}
memcached_return memcached_mget(memcached_st *ptr,
- char **keys, size_t *key_length,
- unsigned int number_of_keys)
+ const char **keys, size_t *key_length,
+ size_t number_of_keys)
{
return memcached_mget_by_key(ptr, NULL, 0, keys, key_length, number_of_keys);
}
static memcached_return binary_mget_by_key(memcached_st *ptr,
unsigned int master_server_key,
bool is_master_key_set,
- char **keys, size_t *key_length,
- unsigned int number_of_keys);
+ const char **keys, size_t *key_length,
+ size_t number_of_keys);
memcached_return memcached_mget_by_key(memcached_st *ptr,
const char *master_key,
size_t master_key_length,
- char **keys,
+ const char **keys,
size_t *key_length,
- unsigned int number_of_keys)
+ size_t number_of_keys)
{
unsigned int x;
memcached_return rc= MEMCACHED_NOTFOUND;
- char *get_command= "get ";
+ const char *get_command= "get ";
uint8_t get_command_length= 4;
unsigned int master_server_key= (unsigned int)-1; /* 0 is a valid server id! */
bool is_master_key_set= false;
if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test(keys, key_length, number_of_keys) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
- if (ptr->flags & MEM_SUPPORT_CAS)
- {
- get_command= "gets ";
- get_command_length= 5;
- }
-
if (master_key && master_key_length)
{
- if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test((char **)&master_key, &master_key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
+ if ((ptr->flags & MEM_VERIFY_KEY) && (memcached_key_test((const char **)&master_key, &master_key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
master_server_key= memcached_generate_hash(ptr, master_key, master_key_length);
is_master_key_set= true;
return binary_mget_by_key(ptr, master_server_key, is_master_key_set, keys,
key_length, number_of_keys);
+ if (ptr->flags & MEM_SUPPORT_CAS)
+ {
+ get_command= "gets ";
+ get_command_length= 5;
+ }
+
/*
If a server fails we warn about errors and start all over with sending keys
to the server.
return rc;
}
-static memcached_return binary_mget_by_key(memcached_st *ptr,
+static memcached_return simple_binary_mget(memcached_st *ptr,
unsigned int master_server_key,
bool is_master_key_set,
- char **keys, size_t *key_length,
- unsigned int number_of_keys)
+ const char **keys, size_t *key_length,
+ size_t number_of_keys)
{
memcached_return rc= MEMCACHED_NOTFOUND;
uint32_t x;
return rc;
}
+
+static memcached_return replication_binary_mget(memcached_st *ptr,
+ uint32_t* hash, bool* dead_servers,
+ const char **keys, size_t *key_length,
+ size_t number_of_keys)
+{
+ memcached_return rc= MEMCACHED_NOTFOUND;
+ uint32_t x;
+
+ int flush= number_of_keys == 1;
+
+ for (uint32_t replica= 0; replica <= ptr->number_of_replicas; ++replica)
+ {
+ bool success= true;
+
+ for (x= 0; x < number_of_keys; ++x)
+ {
+ if (hash[x] == ptr->number_of_hosts)
+ continue; /* Already successfully sent */
+
+ uint32_t server= hash[x] + replica;
+ while (server >= ptr->number_of_hosts)
+ server -= ptr->number_of_hosts;
+
+ if (dead_servers[server])
+ continue;
+
+ if (memcached_server_response_count(&ptr->hosts[server]) == 0)
+ {
+ rc= memcached_connect(&ptr->hosts[server]);
+ if (rc != MEMCACHED_SUCCESS)
+ {
+ memcached_io_reset(&ptr->hosts[server]);
+ dead_servers[server]= true;
+ success= false;
+ continue;
+ }
+ }
+
+ protocol_binary_request_getk request= {.bytes= {0}};
+ request.message.header.request.magic= PROTOCOL_BINARY_REQ;
+ if (number_of_keys == 1)
+ request.message.header.request.opcode= PROTOCOL_BINARY_CMD_GETK;
+ else
+ request.message.header.request.opcode= PROTOCOL_BINARY_CMD_GETKQ;
+
+ request.message.header.request.keylen= htons((uint16_t)key_length[x]);
+ request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
+ request.message.header.request.bodylen= htonl(key_length[x]);
+
+ if ((memcached_io_write(&ptr->hosts[server], request.bytes,
+ sizeof(request.bytes), 0) == -1) ||
+ (memcached_io_write(&ptr->hosts[server], keys[x],
+ key_length[x], flush) == -1))
+ {
+ memcached_io_reset(&ptr->hosts[server]);
+ dead_servers[server]= true;
+ success= false;
+ continue;
+ }
+ memcached_server_response_increment(&ptr->hosts[server]);
+ }
+
+ if (number_of_keys > 1)
+ {
+ /*
+ * Send a noop command to flush the buffers
+ */
+ protocol_binary_request_noop request= {.bytes= {0}};
+ request.message.header.request.magic= PROTOCOL_BINARY_REQ;
+ request.message.header.request.opcode= PROTOCOL_BINARY_CMD_NOOP;
+ request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
+
+ for (x= 0; x < ptr->number_of_hosts; x++)
+ if (memcached_server_response_count(&ptr->hosts[x]))
+ {
+ if (memcached_io_write(&ptr->hosts[x], request.bytes,
+ sizeof(request.bytes), 1) == -1)
+ {
+ memcached_io_reset(&ptr->hosts[x]);
+ dead_servers[x]= true;
+ success= false;
+ }
+ memcached_server_response_increment(&ptr->hosts[x]);
+
+ /* mark all of the messages bound for this server as sent! */
+ for (x= 0; x < number_of_keys; ++x)
+ if (hash[x] == x)
+ hash[x]= ptr->number_of_hosts;
+ }
+ }
+
+ if (success)
+ break;
+ }
+
+ return rc;
+}
+
+static memcached_return binary_mget_by_key(memcached_st *ptr,
+ unsigned int master_server_key,
+ bool is_master_key_set,
+ const char **keys, size_t *key_length,
+ size_t number_of_keys)
+{
+ memcached_return rc;
+
+ if (ptr->number_of_replicas == 0)
+ {
+ rc= simple_binary_mget(ptr, master_server_key, is_master_key_set,
+ keys, key_length, number_of_keys);
+ }
+ else
+ {
+ uint32_t* hash;
+ bool* dead_servers;
+
+ hash= ptr->call_malloc(ptr, sizeof(uint32_t) * number_of_keys);
+ dead_servers= ptr->call_calloc(ptr, ptr->number_of_hosts, sizeof(bool));
+
+ if (hash == NULL || dead_servers == NULL)
+ {
+ ptr->call_free(ptr, hash);
+ ptr->call_free(ptr, dead_servers);
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ if (is_master_key_set)
+ for (unsigned int x= 0; x < number_of_keys; x++)
+ hash[x]= master_server_key;
+ else
+ for (unsigned int x= 0; x < number_of_keys; x++)
+ hash[x]= memcached_generate_hash(ptr, keys[x], key_length[x]);
+
+ rc= replication_binary_mget(ptr, hash, dead_servers, keys,
+ key_length, number_of_keys);
+
+ ptr->call_free(ptr, hash);
+ ptr->call_free(ptr, dead_servers);
+
+ return MEMCACHED_SUCCESS;
+ }
+
+ return rc;
+}
projects / m6w6 / libmemcached / blobdiff