#include <libmemcached/common.h>
#include <libmemcached/memcached/protocol_binary.h>
-memcached_return_t memcached_delete(memcached_st *ptr, const char *key, size_t key_length,
+memcached_return_t memcached_delete(memcached_st *shell, const char *key, size_t key_length,
time_t expiration)
{
- return memcached_delete_by_key(ptr, key, key_length,
- key, key_length, expiration);
+ return memcached_delete_by_key(shell, key, key_length, key, key_length, expiration);
}
-static inline memcached_return_t binary_delete(memcached_st *ptr,
- uint32_t server_key,
- const char *key,
- size_t key_length,
- bool flush);
-
-memcached_return_t memcached_delete_by_key(memcached_st *ptr,
- const char *group_key, size_t group_key_length,
- const char *key, size_t key_length,
- time_t expiration)
+static inline memcached_return_t ascii_delete(memcached_instance_st* instance,
+ uint32_t ,
+ const char *key,
+ const size_t key_length,
+ const bool reply,
+ const bool is_buffering)
{
- bool to_write;
- char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
- memcached_server_write_instance_st instance;
-
- LIBMEMCACHED_MEMCACHED_DELETE_START();
-
- memcached_return_t rc;
- if (memcached_failed(rc= initialize_query(ptr)))
+ libmemcached_io_vector_st vector[]=
{
- return rc;
- }
-
- rc= memcached_validate_key_length(key_length,
- ptr->flags.binary_protocol);
-
- unlikely (memcached_failed(rc))
- return rc;
+ { NULL, 0 },
+ { memcached_literal_param("delete ") },
+ { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
+ { key, key_length },
+ { " noreply", reply ? 0 : memcached_literal_param_size(" noreply") },
+ { memcached_literal_param("\r\n") }
+ };
- unlikely (memcached_server_count(ptr) == 0)
- return MEMCACHED_NO_SERVERS;
+ /* Send command header, only flush if we are NOT buffering */
+ return memcached_vdo(instance, vector, 6, is_buffering ? false : true);
+}
- uint32_t server_key= memcached_generate_hash_with_redistribution(ptr, group_key, group_key_length);
- instance= memcached_server_instance_fetch(ptr, server_key);
+static inline memcached_return_t binary_delete(memcached_instance_st* instance,
+ uint32_t server_key,
+ const char *key,
+ const size_t key_length,
+ const bool reply,
+ const bool is_buffering)
+{
+ protocol_binary_request_delete request= {};
- to_write= (ptr->flags.buffer_requests) ? false : true;
+ bool should_flush= is_buffering ? false : true;
- bool no_reply= (ptr->flags.no_reply);
+ initialize_binary_request(instance, request.message.header);
- if (ptr->flags.binary_protocol)
+ if (reply)
{
- likely (! expiration)
- {
- rc= binary_delete(ptr, server_key, key, key_length, to_write);
- }
- else
- {
- rc= MEMCACHED_INVALID_ARGUMENTS;
- }
+ request.message.header.request.opcode= PROTOCOL_BINARY_CMD_DELETE;
}
else
{
- int send_length;
+ request.message.header.request.opcode= PROTOCOL_BINARY_CMD_DELETEQ;
+ }
+ request.message.header.request.keylen= htons(uint16_t(key_length + memcached_array_size(instance->root->_namespace)));
+ request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
+ request.message.header.request.bodylen= htonl(uint32_t(key_length + memcached_array_size(instance->root->_namespace)));
- unlikely (expiration)
- {
- if ((instance->major_version == 1 &&
- instance->minor_version > 2) ||
- instance->major_version > 1)
- {
- rc= MEMCACHED_INVALID_ARGUMENTS;
- goto error;
- }
- else
- {
- /* ensure that we are connected, otherwise we might bump the
- * command counter before connection */
- if ((rc= memcached_connect(instance)) != MEMCACHED_SUCCESS)
- {
- WATCHPOINT_ERROR(rc);
- return rc;
- }
+ libmemcached_io_vector_st vector[]=
+ {
+ { NULL, 0 },
+ { request.bytes, sizeof(request.bytes) },
+ { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
+ { key, key_length }
+ };
- if (instance->minor_version == 0)
- {
- if (no_reply || ! to_write)
- {
- /* We might get out of sync with the server if we
- * send this command to a server newer than 1.2.x..
- * disable no_reply and buffered mode.
- */
- to_write= true;
- if (no_reply)
- memcached_server_response_increment(instance);
- no_reply= false;
- }
- }
- send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
- "delete %.*s%.*s %u%s\r\n",
- memcached_print_array(ptr->_namespace),
- (int) key_length, key,
- (uint32_t)expiration,
- no_reply ? " noreply" :"" );
- }
- }
- else
- {
- send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
- "delete %.*s%.*s%s\r\n",
- memcached_print_array(ptr->_namespace),
- (int)key_length, key, no_reply ? " noreply" :"");
- }
+ memcached_return_t rc= memcached_vdo(instance, vector, 4, should_flush);
- if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || send_length < 0)
- {
- rc= MEMCACHED_WRITE_FAILURE;
- goto error;
- }
+ if (memcached_has_replicas(instance))
+ {
+ request.message.header.request.opcode= PROTOCOL_BINARY_CMD_DELETEQ;
- if (ptr->flags.use_udp && ! to_write)
+ for (uint32_t x= 0; x < memcached_has_replicas(instance); ++x)
{
- if (send_length > MAX_UDP_DATAGRAM_LENGTH - UDP_DATAGRAM_HEADER_LENGTH)
- return MEMCACHED_WRITE_FAILURE;
-
- if (send_length + instance->write_buffer_offset > MAX_UDP_DATAGRAM_LENGTH)
- memcached_io_write(instance, NULL, 0, true);
- }
+ ++server_key;
- rc= memcached_do(instance, buffer, (size_t)send_length, to_write);
- }
+ if (server_key == memcached_server_count(instance->root))
+ {
+ server_key= 0;
+ }
- if (rc != MEMCACHED_SUCCESS)
- goto error;
+ memcached_instance_st* replica= memcached_instance_fetch(instance->root, server_key);
- if (! to_write)
- {
- rc= MEMCACHED_BUFFERED;
- }
- else if (!no_reply)
- {
- rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
- if (rc == MEMCACHED_DELETED)
- rc= MEMCACHED_SUCCESS;
+ if (memcached_success(memcached_vdo(replica, vector, 4, should_flush)))
+ {
+ memcached_server_response_decrement(replica);
+ }
+ }
}
- if (rc == MEMCACHED_SUCCESS && ptr->delete_trigger)
- ptr->delete_trigger(ptr, key, key_length);
-
-error:
- LIBMEMCACHED_MEMCACHED_DELETE_END();
return rc;
}
-static inline memcached_return_t binary_delete(memcached_st *ptr,
- uint32_t server_key,
- const char *key,
- size_t key_length,
- bool flush)
+memcached_return_t memcached_delete_by_key(memcached_st *shell,
+ const char *group_key, size_t group_key_length,
+ const char *key, size_t key_length,
+ time_t expiration)
{
- memcached_server_write_instance_st instance;
- protocol_binary_request_delete request= {};
-
- instance= memcached_server_instance_fetch(ptr, server_key);
+ Memcached* memc= memcached2Memcached(shell);
+ LIBMEMCACHED_MEMCACHED_DELETE_START();
- request.message.header.request.magic= PROTOCOL_BINARY_REQ;
- if (ptr->flags.no_reply)
+ memcached_return_t rc;
+ if (memcached_fatal(rc= initialize_query(memc, true)))
{
- request.message.header.request.opcode= PROTOCOL_BINARY_CMD_DELETEQ;
+ return rc;
}
- else
+
+ if (memcached_fatal(rc= memcached_key_test(*memc, (const char **)&key, &key_length, 1)))
{
- request.message.header.request.opcode= PROTOCOL_BINARY_CMD_DELETE;
+ return memcached_last_error(memc);
}
- request.message.header.request.keylen= htons((uint16_t)(key_length + memcached_array_size(ptr->_namespace)));
- request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
- request.message.header.request.bodylen= htonl((uint32_t)(key_length + memcached_array_size(ptr->_namespace)));
- if (ptr->flags.use_udp && ! flush)
+ if (expiration)
{
- size_t cmd_size= sizeof(request.bytes) + key_length;
- if (cmd_size > MAX_UDP_DATAGRAM_LENGTH - UDP_DATAGRAM_HEADER_LENGTH)
- return MEMCACHED_WRITE_FAILURE;
-
- if (cmd_size + instance->write_buffer_offset > MAX_UDP_DATAGRAM_LENGTH)
- memcached_io_write(instance, NULL, 0, true);
+ return memcached_set_error(*memc, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT,
+ memcached_literal_param("Memcached server version does not allow expiration of deleted items"));
}
- struct libmemcached_io_vector_st vector[]=
+ uint32_t server_key= memcached_generate_hash_with_redistribution(memc, group_key, group_key_length);
+ memcached_instance_st* instance= memcached_instance_fetch(memc, server_key);
+
+ bool is_buffering= memcached_is_buffering(instance->root);
+ bool is_replying= memcached_is_replying(instance->root);
+
+ // If a delete trigger exists, we need a response, so no buffering/noreply
+ if (memc->delete_trigger)
{
- { sizeof(request.bytes), request.bytes},
- { memcached_array_size(ptr->_namespace), memcached_array_string(ptr->_namespace) },
- { key_length, key },
- };
+ if (is_buffering)
+ {
+ return memcached_set_error(*memc, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT,
+ memcached_literal_param("Delete triggers cannot be used if buffering is enabled"));
+ }
- memcached_return_t rc= MEMCACHED_SUCCESS;
+ if (is_replying == false)
+ {
+ return memcached_set_error(*memc, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT,
+ memcached_literal_param("Delete triggers cannot be used if MEMCACHED_BEHAVIOR_NOREPLY is set"));
+ }
+ }
- if ((rc= memcached_vdo(instance, vector, 3, flush)) != MEMCACHED_SUCCESS)
+ if (memcached_is_binary(memc))
{
- memcached_io_reset(instance);
- rc= (rc == MEMCACHED_SUCCESS) ? MEMCACHED_WRITE_FAILURE : rc;
+ rc= binary_delete(instance, server_key, key, key_length, is_replying, is_buffering);
}
-
- unlikely (ptr->number_of_replicas > 0)
+ else
{
- request.message.header.request.opcode= PROTOCOL_BINARY_CMD_DELETEQ;
+ rc= ascii_delete(instance, server_key, key, key_length, is_replying, is_buffering);
+ }
- for (uint32_t x= 0; x < ptr->number_of_replicas; ++x)
+ if (rc == MEMCACHED_SUCCESS)
+ {
+ if (is_buffering == true)
{
- memcached_server_write_instance_st replica;
-
- ++server_key;
- if (server_key == memcached_server_count(ptr))
- server_key= 0;
-
- replica= memcached_server_instance_fetch(ptr, server_key);
-
- if (memcached_vdo(replica, vector, 3, flush) != MEMCACHED_SUCCESS)
- {
- memcached_io_reset(replica);
- }
- else
+ rc= MEMCACHED_BUFFERED;
+ }
+ else if (is_replying == false)
+ {
+ rc= MEMCACHED_SUCCESS;
+ }
+ else
+ {
+ char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
+ rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
+ if (rc == MEMCACHED_DELETED)
{
- memcached_server_response_decrement(replica);
+ rc= MEMCACHED_SUCCESS;
+ if (memc->delete_trigger)
+ {
+ memc->delete_trigger(memc, key, key_length);
+ }
}
}
}
+ LIBMEMCACHED_MEMCACHED_DELETE_END();
return rc;
}
projects / awesomized / libmemcached / blobdiff