+/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ *
+ * Libmemcached library
+ *
+ * Copyright (C) 2011 Data Differential, http://datadifferential.com/
+ *
+ * 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.
+ *
+ */
+
/*
We use this to dump all keys.
#include <libmemcached/common.h>
-static memcached_return_t ascii_dump(memcached_st *ptr, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks)
+static memcached_return_t ascii_dump(memcached_st *memc, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks)
{
- memcached_return_t rc= MEMCACHED_SUCCESS;
-
- for (uint32_t server_key= 0; server_key < memcached_server_count(ptr); server_key++)
+ /* MAX_NUMBER_OF_SLAB_CLASSES is defined to 200 in Memcached 1.4.10 */
+ for (uint32_t x= 0; x < 200; x++)
{
- memcached_server_write_instance_st instance;
- instance= memcached_server_instance_fetch(ptr, server_key);
+ char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
+ int buffer_length= snprintf(buffer, sizeof(buffer), "%u", x);
+ if (size_t(buffer_length) >= sizeof(buffer) or buffer_length < 0)
+ {
+ return memcached_set_error(*memc, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
+ }
+
+ // @NOTE the hard coded zero means "no limit"
+ libmemcached_io_vector_st vector[]=
+ {
+ { memcached_literal_param("stats cachedump ") },
+ { buffer, size_t(buffer_length) },
+ { memcached_literal_param(" 0\r\n") }
+ };
- /* 256 I BELIEVE is the upper limit of slabs */
- for (uint32_t x= 0; x < 256; x++)
+ // Send message to all servers
+ for (uint32_t server_key= 0; server_key < memcached_server_count(memc); server_key++)
{
- char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
- int send_length;
- send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
- "stats cachedump %u 0 0\r\n", x);
+ memcached_server_write_instance_st instance= memcached_server_instance_fetch(memc, server_key);
- if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || send_length < 0)
+ memcached_return_t vdo_rc;
+ if (memcached_success((vdo_rc= memcached_vdo(instance, vector, 3, true))))
{
- return memcached_set_error(*ptr, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
- memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
+ // We have sent the message to the server successfully
}
-
- rc= memcached_do(instance, buffer, (size_t)send_length, true);
-
- if (rc != MEMCACHED_SUCCESS)
+ else
{
- goto error;
+ return vdo_rc;
}
+ }
- while (1)
+ // Collect the returned items
+ memcached_server_write_instance_st instance;
+ while ((instance= memcached_io_get_readable_server(memc)))
+ {
+ memcached_return_t response_rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
+ if (response_rc == MEMCACHED_ITEM)
{
- uint32_t callback_counter;
- rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
+ char *string_ptr, *end_ptr;
- if (rc == MEMCACHED_ITEM)
- {
- char *string_ptr, *end_ptr;
-
- string_ptr= buffer;
- string_ptr+= 5; /* Move past ITEM */
+ string_ptr= buffer;
+ string_ptr+= 5; /* Move past ITEM */
- for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++) {} ;
+ for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++) {} ;
- char *key= string_ptr;
- key[(size_t)(end_ptr-string_ptr)]= 0;
+ char *key= string_ptr;
+ key[(size_t)(end_ptr-string_ptr)]= 0;
- for (callback_counter= 0; callback_counter < number_of_callbacks; callback_counter++)
+ for (uint32_t callback_counter= 0; callback_counter < number_of_callbacks; callback_counter++)
+ {
+ memcached_return_t callback_rc= (*callback[callback_counter])(memc, key, (size_t)(end_ptr-string_ptr), context);
+ if (callback_rc != MEMCACHED_SUCCESS)
{
- rc= (*callback[callback_counter])(ptr, key, (size_t)(end_ptr-string_ptr), context);
- if (rc != MEMCACHED_SUCCESS)
- {
- break;
- }
+ // @todo build up a message for the error from the value
+ memcached_set_error(*instance, callback_rc, MEMCACHED_AT);
+ break;
}
}
- else if (rc == MEMCACHED_END)
- {
- break;
- }
- else if (rc == MEMCACHED_SERVER_ERROR or rc == MEMCACHED_CLIENT_ERROR)
- {
- /* If we try to request stats cachedump for a slab class that is too big
- * the server will return an incorrect error message:
- * "MEMCACHED_SERVER_ERROR failed to allocate memory"
- * This isn't really a fatal error, so let's just skip it. I want to
- * fix the return value from the memcached server to a CLIENT_ERROR,
- * so let's add support for that as well right now.
- */
- rc= MEMCACHED_END;
- break;
- }
- else
- {
- goto error;
- }
+ }
+ else if (response_rc == MEMCACHED_END)
+ {
+ // All items have been returned
+ }
+ else if (response_rc == MEMCACHED_SERVER_ERROR or response_rc == MEMCACHED_CLIENT_ERROR or response_rc == MEMCACHED_ERROR)
+ {
+ /* If we try to request stats cachedump for a slab class that is too big
+ * the server will return an incorrect error message:
+ * "MEMCACHED_SERVER_ERROR failed to allocate memory"
+ * This isn't really a fatal error, so let's just skip it. I want to
+ * fix the return value from the memcached server to a CLIENT_ERROR,
+ * so let's add support for that as well right now.
+ */
+ assert(response_rc == MEMCACHED_SUCCESS); // Just fail
+ return response_rc;
+ }
+ else
+ {
+ // IO error of some sort must have occurred
+ return response_rc;
}
}
}
-error:
- if (rc == MEMCACHED_END)
- {
- return MEMCACHED_SUCCESS;
- }
- else
- {
- return rc;
- }
+ return memcached_has_current_error(*memc) ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
}
memcached_return_t memcached_dump(memcached_st *ptr, memcached_dump_fn *callback, void *context, uint32_t number_of_callbacks)
{
memcached_return_t rc;
- if ((rc= initialize_query(ptr)) != MEMCACHED_SUCCESS)
+ if (memcached_failed(rc= initialize_query(ptr, true)))
{
return rc;
}
No support for Binary protocol yet
@todo Fix this so that we just flush, switch to ascii, and then go back to binary.
*/
- if (ptr->flags.binary_protocol)
+ if (memcached_is_binary(ptr))
{
- return MEMCACHED_FAILURE;
+ return memcached_set_error(*ptr, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT, memcached_literal_param("Binary protocol is not supported for memcached_dump()"));
}
return ascii_dump(ptr, callback, context, number_of_callbacks);
projects / m6w6 / libmemcached / blobdiff