X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=libmemcached%2Fget.c;h=46b6319c564e16a8b5c902064e7df5bcb9e06239;hb=18ace40ddb7271f3f5e71965f74fe11d7754bd8f;hp=1df6247cbbcf6b3f6d12af8e63de03aa5793e655;hpb=ba24508f51eed2af4f0192589801db2f945eac7b;p=awesomized%2Flibmemcached diff --git a/libmemcached/get.c b/libmemcached/get.c index 1df6247c..46b6319c 100644 --- a/libmemcached/get.c +++ b/libmemcached/get.c @@ -1,5 +1,5 @@ /* LibMemcached - * Copyright (C) 2006-2009 Brian Aker + * Copyright (C) 2006-2009 Brian Aker * All rights reserved. * * Use and distribution licensed under the BSD license. See @@ -25,16 +25,16 @@ char *memcached_get(memcached_st *ptr, const char *key, } static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, - const char *master_key, - size_t master_key_length, + const char *group_key, + size_t group_key_length, const char * const *keys, const size_t *key_length, size_t number_of_keys, bool mget_mode); char *memcached_get_by_key(memcached_st *ptr, - const char *master_key, - size_t master_key_length, + const char *group_key, + size_t group_key_length, const char *key, size_t key_length, size_t *value_length, uint32_t *flags, @@ -52,7 +52,7 @@ char *memcached_get_by_key(memcached_st *ptr, } /* Request the key */ - *error= memcached_mget_by_key_real(ptr, master_key, master_key_length, + *error= memcached_mget_by_key_real(ptr, group_key, group_key_length, (const char * const *)&key, &key_length, 1, false); @@ -130,26 +130,31 @@ memcached_return_t memcached_mget(memcached_st *ptr, static memcached_return_t binary_mget_by_key(memcached_st *ptr, uint32_t master_server_key, - bool is_master_key_set, + bool is_group_key_set, const char * const *keys, const size_t *key_length, size_t number_of_keys, bool mget_mode); static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, - const char *master_key, - size_t master_key_length, + const char *group_key, + size_t group_key_length, const char * const *keys, const size_t *key_length, size_t number_of_keys, bool mget_mode) { - uint32_t x; - memcached_return_t rc= MEMCACHED_NOTFOUND; + bool failures_occured_in_sending= false; 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; + bool is_group_key_set= false; + + memcached_return_t rc; + if ((rc= initialize_query(ptr)) != MEMCACHED_SUCCESS) + { + return rc; + } unlikely (ptr->flags.use_udp) return MEMCACHED_NOT_SUPPORTED; @@ -159,18 +164,15 @@ static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, if (number_of_keys == 0) return MEMCACHED_NOTFOUND; - if (memcached_server_count(ptr) == 0) - return MEMCACHED_NO_SERVERS; - if (ptr->flags.verify_key && (memcached_key_test(keys, key_length, number_of_keys) == MEMCACHED_BAD_KEY_PROVIDED)) return MEMCACHED_BAD_KEY_PROVIDED; - if (master_key && master_key_length) + if (group_key && group_key_length) { - if (ptr->flags.verify_key && (memcached_key_test((const char * const *)&master_key, &master_key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED)) + if (ptr->flags.verify_key && (memcached_key_test((const char * const *)&group_key, &group_key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED)) return MEMCACHED_BAD_KEY_PROVIDED; - master_server_key= memcached_generate_hash_with_redistribution(ptr, master_key, master_key_length); - is_master_key_set= true; + master_server_key= memcached_generate_hash_with_redistribution(ptr, group_key, group_key_length); + is_group_key_set= true; } /* @@ -179,7 +181,7 @@ static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, It might be optimum to bounce the connection if count > some number. */ - for (x= 0; x < memcached_server_count(ptr); x++) + for (uint32_t x= 0; x < memcached_server_count(ptr); x++) { memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x); @@ -197,8 +199,10 @@ static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, } if (ptr->flags.binary_protocol) - return binary_mget_by_key(ptr, master_server_key, is_master_key_set, keys, + { + return binary_mget_by_key(ptr, master_server_key, is_group_key_set, keys, key_length, number_of_keys, mget_mode); + } if (ptr->flags.support_cas) { @@ -210,12 +214,14 @@ static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, If a server fails we warn about errors and start all over with sending keys to the server. */ - for (x= 0; x < number_of_keys; x++) + WATCHPOINT_ASSERT(rc == MEMCACHED_SUCCESS); + size_t hosts_connected= 0; + for (uint32_t x= 0; x < number_of_keys; x++) { memcached_server_write_instance_st instance; uint32_t server_key; - if (is_master_key_set) + if (is_group_key_set) { server_key= master_server_key; } @@ -226,53 +232,61 @@ static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, instance= memcached_server_instance_fetch(ptr, server_key); + struct libmemcached_io_vector_st vector[]= + { + { .length= get_command_length, .buffer= get_command }, + { .length= memcached_array_size(ptr->prefix_key), .buffer= memcached_array_string(ptr->prefix_key) }, + { .length= key_length[x], .buffer= keys[x] }, + { .length= 1, .buffer= " " } + }; + + if (memcached_server_response_count(instance) == 0) { rc= memcached_connect(instance); if (rc != MEMCACHED_SUCCESS) + { continue; + } + hosts_connected++; - if ((memcached_io_write(instance, get_command, get_command_length, false)) == -1) + if ((memcached_io_writev(instance, vector, 4, false)) == -1) { - rc= MEMCACHED_SOME_ERRORS; + failures_occured_in_sending= true; continue; } WATCHPOINT_ASSERT(instance->cursor_active == 0); memcached_server_response_increment(instance); WATCHPOINT_ASSERT(instance->cursor_active == 1); } - - /* Only called when we have a prefix key */ - if (ptr->prefix_key_length) + else { - if ((memcached_io_write(instance, ptr->prefix_key, ptr->prefix_key_length, false)) == -1) + if ((memcached_io_writev(instance, (vector + 1), 3, false)) == -1) { memcached_server_response_reset(instance); - rc= MEMCACHED_SOME_ERRORS; + failures_occured_in_sending= true; continue; } } + } - if ((memcached_io_write(instance, keys[x], key_length[x], false)) == -1) - { - memcached_server_response_reset(instance); - rc= MEMCACHED_SOME_ERRORS; - continue; - } + if (hosts_connected == 0) + { + LIBMEMCACHED_MEMCACHED_MGET_END(); - if ((memcached_io_write(instance, " ", 1, false)) == -1) - { - memcached_server_response_reset(instance); - rc= MEMCACHED_SOME_ERRORS; - continue; - } + if (rc != MEMCACHED_SUCCESS) + return rc; + + return MEMCACHED_NO_SERVERS; } + /* Should we muddle on if some servers are dead? */ - for (x= 0; x < memcached_server_count(ptr); x++) + bool success_happened= false; + for (uint32_t x= 0; x < memcached_server_count(ptr); x++) { memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x); @@ -282,23 +296,34 @@ static memcached_return_t memcached_mget_by_key_real(memcached_st *ptr, /* We need to do something about non-connnected hosts in the future */ if ((memcached_io_write(instance, "\r\n", 2, true)) == -1) { - rc= MEMCACHED_SOME_ERRORS; + failures_occured_in_sending= true; + } + else + { + success_happened= true; } } } LIBMEMCACHED_MEMCACHED_MGET_END(); - return rc; + + if (failures_occured_in_sending && success_happened) + return MEMCACHED_SOME_ERRORS; + + if (success_happened) + return MEMCACHED_SUCCESS; + + return MEMCACHED_FAILURE; } memcached_return_t memcached_mget_by_key(memcached_st *ptr, - const char *master_key, - size_t master_key_length, + const char *group_key, + size_t group_key_length, const char * const *keys, const size_t *key_length, size_t number_of_keys) { - return memcached_mget_by_key_real(ptr, master_key, master_key_length, keys, + return memcached_mget_by_key_real(ptr, group_key, group_key_length, keys, key_length, number_of_keys, true); } @@ -316,8 +341,8 @@ memcached_return_t memcached_mget_execute(memcached_st *ptr, } memcached_return_t memcached_mget_execute_by_key(memcached_st *ptr, - const char *master_key, - size_t master_key_length, + const char *group_key, + size_t group_key_length, const char * const *keys, const size_t *key_length, size_t number_of_keys, @@ -337,7 +362,7 @@ memcached_return_t memcached_mget_execute_by_key(memcached_st *ptr, }; ptr->callbacks= &cb; - rc= memcached_mget_by_key(ptr, master_key, master_key_length, keys, + rc= memcached_mget_by_key(ptr, group_key, group_key_length, keys, key_length, number_of_keys); ptr->callbacks= original_callbacks; return rc; @@ -345,26 +370,25 @@ memcached_return_t memcached_mget_execute_by_key(memcached_st *ptr, static memcached_return_t simple_binary_mget(memcached_st *ptr, uint32_t master_server_key, - bool is_master_key_set, + bool is_group_key_set, const char * const *keys, const size_t *key_length, size_t number_of_keys, bool mget_mode) { memcached_return_t rc= MEMCACHED_NOTFOUND; - uint32_t x; - int flush= number_of_keys == 1; + bool flush= (number_of_keys == 1); /* If a server fails we warn about errors and start all over with sending keys to the server. */ - for (x= 0; x < number_of_keys; x++) + for (uint32_t x= 0; x < number_of_keys; ++x) { uint32_t server_key; memcached_server_write_instance_st instance; - if (is_master_key_set) + if (is_group_key_set) { server_key= master_server_key; } @@ -402,14 +426,18 @@ static memcached_return_t simple_binary_mget(memcached_st *ptr, return vk; } - request.message.header.request.keylen= htons((uint16_t)key_length[x]); + request.message.header.request.keylen= htons((uint16_t)(key_length[x] + memcached_array_size(ptr->prefix_key))); request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES; - request.message.header.request.bodylen= htonl((uint32_t) key_length[x]); + request.message.header.request.bodylen= htonl((uint32_t)( key_length[x] + memcached_array_size(ptr->prefix_key))); + + struct libmemcached_io_vector_st vector[]= + { + { .length= sizeof(request.bytes), .buffer= request.bytes }, + { .length= memcached_array_size(ptr->prefix_key), .buffer= memcached_array_string(ptr->prefix_key) }, + { .length= key_length[x], .buffer= keys[x] } + }; - if ((memcached_io_write(instance, request.bytes, - sizeof(request.bytes), false) == -1) || - (memcached_io_write(instance, keys[x], - key_length[x], flush) == -1)) + if (memcached_io_writev(instance, vector, 3, flush) == -1) { memcached_server_response_reset(instance); rc= MEMCACHED_SOME_ERRORS; @@ -419,9 +447,10 @@ static memcached_return_t simple_binary_mget(memcached_st *ptr, /* We just want one pending response per server */ memcached_server_response_reset(instance); memcached_server_response_increment(instance); - if ((x > 0 && x == ptr->io_key_prefetch) && - memcached_flush_buffers(ptr) != MEMCACHED_SUCCESS) + if ((x > 0 && x == ptr->io_key_prefetch) && memcached_flush_buffers(ptr) != MEMCACHED_SUCCESS) + { rc= MEMCACHED_SOME_ERRORS; + } } if (mget_mode) @@ -434,7 +463,7 @@ static memcached_return_t simple_binary_mget(memcached_st *ptr, request.message.header.request.opcode= PROTOCOL_BINARY_CMD_NOOP; request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES; - for (x= 0; x < memcached_server_count(ptr); x++) + for (uint32_t x= 0; x < memcached_server_count(ptr); ++x) { memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x); @@ -471,7 +500,7 @@ static memcached_return_t replication_binary_mget(memcached_st *ptr, size_t number_of_keys) { memcached_return_t rc= MEMCACHED_NOTFOUND; - uint32_t x, start= 0; + uint32_t start= 0; uint64_t randomize_read= memcached_behavior_get(ptr, MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ); if (randomize_read) @@ -482,7 +511,7 @@ static memcached_return_t replication_binary_mget(memcached_st *ptr, { bool success= true; - for (x= 0; x < number_of_keys; ++x) + for (uint32_t x= 0; x < number_of_keys; ++x) { memcached_server_write_instance_st instance; @@ -519,9 +548,9 @@ static memcached_return_t replication_binary_mget(memcached_st *ptr, .message.header.request= { .magic= PROTOCOL_BINARY_REQ, .opcode= PROTOCOL_BINARY_CMD_GETK, - .keylen= htons((uint16_t)key_length[x]), + .keylen= htons((uint16_t)(key_length[x] + memcached_array_size(ptr->prefix_key))), .datatype= PROTOCOL_BINARY_RAW_BYTES, - .bodylen= htonl((uint32_t)key_length[x]) + .bodylen= htonl((uint32_t)(key_length[x] + memcached_array_size(ptr->prefix_key))) } }; @@ -535,10 +564,14 @@ static memcached_return_t replication_binary_mget(memcached_st *ptr, * that we might have processed some of the responses etc. For now, * just make sure we work _correctly_ */ - if ((memcached_io_write(instance, request.bytes, - sizeof(request.bytes), false) == -1) || - (memcached_io_write(instance, keys[x], - key_length[x], true) == -1)) + struct libmemcached_io_vector_st vector[]= + { + { .length= sizeof(request.bytes), .buffer= request.bytes }, + { .length= memcached_array_size(ptr->prefix_key), .buffer= memcached_array_string(ptr->prefix_key) }, + { .length= key_length[x], .buffer= keys[x] } + }; + + if (memcached_io_writev(instance, vector, 3, true) == -1) { memcached_io_reset(instance); dead_servers[server]= true; @@ -559,7 +592,7 @@ static memcached_return_t replication_binary_mget(memcached_st *ptr, static memcached_return_t binary_mget_by_key(memcached_st *ptr, uint32_t master_server_key, - bool is_master_key_set, + bool is_group_key_set, const char * const *keys, const size_t *key_length, size_t number_of_keys, @@ -569,7 +602,7 @@ static memcached_return_t binary_mget_by_key(memcached_st *ptr, if (ptr->number_of_replicas == 0) { - rc= simple_binary_mget(ptr, master_server_key, is_master_key_set, + rc= simple_binary_mget(ptr, master_server_key, is_group_key_set, keys, key_length, number_of_keys, mget_mode); } else @@ -587,7 +620,7 @@ static memcached_return_t binary_mget_by_key(memcached_st *ptr, return MEMCACHED_MEMORY_ALLOCATION_FAILURE; } - if (is_master_key_set) + if (is_group_key_set) { for (size_t x= 0; x < number_of_keys; x++) {