/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Libmemcached library
*
* Copyright (C) 2011 Data Differential, http://datadifferential.com/
* Copyright (C) 2006-2009 Brian Aker All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * The names of its contributors may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <libmemcached/common.h>
#include <libmemcached/memcached/protocol_binary.h>
static memcached_return_t ascii_touch(memcached_instance_st* instance,
const char *key, size_t key_length,
time_t expiration)
{
char expiration_buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
int expiration_buffer_length= snprintf(expiration_buffer, sizeof(expiration_buffer), " %llu", (unsigned long long)expiration);
if (size_t(expiration_buffer_length) >= sizeof(expiration_buffer) or expiration_buffer_length < 0)
{
return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
memcached_literal_param("snprintf(MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH)"));
}
libmemcached_io_vector_st vector[]=
{
{ NULL, 0 },
{ memcached_literal_param("touch ") },
{ memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
{ key, key_length },
{ expiration_buffer, size_t(expiration_buffer_length) },
{ memcached_literal_param("\r\n") }
};
memcached_return_t rc;
if (memcached_failed(rc= memcached_vdo(instance, vector, 6, true)))
{
memcached_io_reset(instance);
return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
}
return rc;
}
static memcached_return_t binary_touch(memcached_instance_st* instance,
const char *key, size_t key_length,
time_t expiration)
{
protocol_binary_request_touch request= {}; //{.bytes= {0}};
initialize_binary_request(instance, request.message.header);
request.message.header.request.opcode= PROTOCOL_BINARY_CMD_TOUCH;
request.message.header.request.extlen= 4;
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) +request.message.header.request.extlen));
request.message.body.expiration= htonl((uint32_t) expiration);
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 }
};
memcached_return_t rc;
if (memcached_failed(rc= memcached_vdo(instance, vector, 4, true)))
{
memcached_io_reset(instance);
return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
}
return rc;
}
memcached_return_t memcached_touch(memcached_st *ptr,
const char *key, size_t key_length,
time_t expiration)
{
return memcached_touch_by_key(ptr, key, key_length, key, key_length, expiration);
}
memcached_return_t memcached_touch_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* ptr= memcached2Memcached(shell);
LIBMEMCACHED_MEMCACHED_TOUCH_START();
memcached_return_t rc;
if (memcached_failed(rc= initialize_query(ptr, true)))
{
return rc;
}
if (memcached_failed(rc= memcached_validate_key_length(key_length, ptr->flags.binary_protocol)))
{
return rc;
}
uint32_t server_key= memcached_generate_hash_with_redistribution(ptr, group_key, group_key_length);
memcached_instance_st* instance= memcached_instance_fetch(ptr, server_key);
if (ptr->flags.binary_protocol)
{
rc= binary_touch(instance, key, key_length, expiration);
}
else
{
rc= ascii_touch(instance, key, key_length, expiration);
}
if (memcached_failed(rc))
{
return memcached_set_error(*instance, rc, MEMCACHED_AT, memcached_literal_param("Error occcured while writing touch command to server"));
}
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
rc= memcached_response(instance, buffer, sizeof(buffer), NULL);
if (rc == MEMCACHED_SUCCESS or rc == MEMCACHED_NOTFOUND)
{
return rc;
}
return memcached_set_error(*instance, rc, MEMCACHED_AT, memcached_literal_param("Error occcured while reading response"));
}