1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
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39 This is a partial implementation for fetching/creating memcached_server_st objects.
41 #include <libmemcached/common.h>
43 static inline void _server_init(memcached_server_st
*self
, memcached_st
*root
,
44 const memcached_string_t
& hostname
,
46 uint32_t weight
, memcached_connection_t type
)
48 self
->options
.is_shutting_down
= false;
49 self
->options
.is_dead
= false;
50 self
->number_of_hosts
= 0;
51 self
->cursor_active
= 0;
53 self
->fd
= INVALID_SOCKET
;
54 self
->io_bytes_sent
= 0;
55 self
->server_failure_counter
= 0;
56 self
->server_failure_counter_query_id
= 0;
57 self
->weight
= weight
? weight
: 1; // 1 is the default weight value
58 self
->io_wait_count
.read
= 0;
59 self
->io_wait_count
.write
= 0;
60 self
->io_wait_count
.timeouts
= 0;
61 self
->io_wait_count
._bytes_read
= 0;
62 self
->major_version
= UINT8_MAX
;
63 self
->micro_version
= UINT8_MAX
;
64 self
->minor_version
= UINT8_MAX
;
66 self
->error_messages
= NULL
;
67 self
->read_ptr
= self
->read_buffer
;
68 self
->read_buffer_length
= 0;
69 self
->read_data_length
= 0;
70 self
->write_buffer_offset
= 0;
71 self
->address_info
= NULL
;
72 self
->address_info_next
= NULL
;
74 self
->state
= MEMCACHED_SERVER_STATE_NEW
;
80 self
->version
= ++root
->server_info
.version
;
84 self
->version
= UINT_MAX
;
86 self
->limit_maxbytes
= 0;
87 memcpy(self
->hostname
, hostname
.c_str
, hostname
.size
);
88 self
->hostname
[hostname
.size
]= 0;
91 static memcached_server_st
*_server_create(memcached_server_st
*self
, const memcached_st
*memc
)
95 self
= libmemcached_xmalloc(memc
, struct memcached_server_st
);
99 return NULL
; /* MEMCACHED_MEMORY_ALLOCATION_FAILURE */
102 self
->options
.is_allocated
= true;
106 self
->options
.is_allocated
= false;
109 self
->options
.is_initialized
= true;
114 memcached_server_st
*__server_create_with(memcached_st
*memc
,
115 memcached_server_write_instance_st self
,
116 const memcached_string_t
& hostname
,
117 const in_port_t port
,
119 const memcached_connection_t type
)
121 if (memcached_is_valid_servername(hostname
) == false)
123 memcached_set_error(*memc
, MEMCACHED_INVALID_ARGUMENTS
, MEMCACHED_AT
, memcached_literal_param("Invalid hostname provided"));
127 self
= _server_create(self
, memc
);
134 _server_init(self
, const_cast<memcached_st
*>(memc
), hostname
, port
, weight
, type
);
136 if (memc
and memcached_is_udp(memc
))
138 self
->write_buffer_offset
= UDP_DATAGRAM_HEADER_LENGTH
;
139 memcached_io_init_udp_header(self
, 0);
144 memcached_connect_try(self
);
150 void __server_free(memcached_server_st
*self
)
152 memcached_quit_server(self
, false);
154 if (self
->address_info
)
156 freeaddrinfo(self
->address_info
);
157 self
->address_info
= NULL
;
158 self
->address_info_next
= NULL
;
161 memcached_error_free(*self
);
163 if (memcached_is_allocated(self
))
165 libmemcached_free(self
->root
, self
);
169 self
->options
.is_initialized
= false;
173 void memcached_server_free(memcached_server_st
*self
)
180 if (memcached_server_list_count(self
))
182 memcached_server_list_free(self
);
190 If we do not have a valid object to clone from, we toss an error.
192 memcached_server_st
*memcached_server_clone(memcached_server_st
*destination
,
193 memcached_server_st
*source
)
195 /* We just do a normal create if source is missing */
201 memcached_string_t hostname
= { memcached_string_make_from_cstr(source
->hostname
) };
202 destination
= __server_create_with(source
->root
, destination
,
204 source
->port
, source
->weight
,
210 memcached_return_t
memcached_server_cursor(const memcached_st
*ptr
,
211 const memcached_server_fn
*callback
,
213 uint32_t number_of_callbacks
)
215 memcached_return_t rc
;
216 if (memcached_failed(rc
= initialize_const_query(ptr
)))
222 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
224 memcached_server_instance_st instance
=
225 memcached_server_instance_by_position(ptr
, x
);
227 for (uint32_t y
= 0; y
< number_of_callbacks
; y
++)
229 memcached_return_t ret
= (*callback
[y
])(ptr
, instance
, context
);
231 if (memcached_failed(ret
))
239 return errors
? MEMCACHED_SOME_ERRORS
: MEMCACHED_SUCCESS
;
242 memcached_return_t
memcached_server_execute(memcached_st
*ptr
,
243 memcached_server_execute_fn callback
,
246 if (callback
== NULL
)
248 return MEMCACHED_INVALID_ARGUMENTS
;
251 bool some_errors
= false;;
252 for (uint32_t x
= 0; x
< memcached_server_count(ptr
); x
++)
254 memcached_server_write_instance_st instance
= memcached_server_instance_fetch(ptr
, x
);
256 memcached_return_t rc
= (*callback
)(ptr
, instance
, context
);
257 if (rc
== MEMCACHED_INVALID_ARGUMENTS
)
261 else if (memcached_fatal(rc
))
268 return MEMCACHED_SUCCESS
;
271 memcached_server_instance_st
memcached_server_by_key(memcached_st
*ptr
,
274 memcached_return_t
*error
)
276 memcached_return_t unused
;
283 memcached_return_t rc
;
284 if (memcached_failed(rc
= initialize_const_query(ptr
)))
290 if (memcached_failed((memcached_key_test(*ptr
, (const char **)&key
, &key_length
, 1))))
292 *error
= memcached_last_error(ptr
);
296 uint32_t server_key
= memcached_generate_hash(ptr
, key
, key_length
);
297 return memcached_server_instance_by_position(ptr
, server_key
);
301 void memcached_server_error_reset(memcached_server_st
*self
)
303 WATCHPOINT_ASSERT(self
);
309 memcached_error_free(*self
);
312 memcached_server_instance_st
memcached_server_get_last_disconnect(const memcached_st
*self
)
314 WATCHPOINT_ASSERT(self
);
320 return self
->last_disconnected_server
;
323 uint32_t memcached_servers_set_count(memcached_server_st
*servers
, uint32_t count
)
325 WATCHPOINT_ASSERT(servers
);
331 return servers
->number_of_hosts
= count
;
334 uint32_t memcached_server_count(const memcached_st
*self
)
336 WATCHPOINT_ASSERT(self
);
340 return self
->number_of_hosts
;
343 const char *memcached_server_name(const memcached_server_instance_st self
)
345 WATCHPOINT_ASSERT(self
);
349 return self
->hostname
;
352 in_port_t
memcached_server_port(const memcached_server_instance_st self
)
354 WATCHPOINT_ASSERT(self
);
363 uint32_t memcached_server_response_count(const memcached_server_instance_st self
)
365 WATCHPOINT_ASSERT(self
);
371 return self
->cursor_active
;
374 const char *memcached_server_type(const memcached_server_instance_st ptr
)
380 case MEMCACHED_CONNECTION_TCP
:
383 case MEMCACHED_CONNECTION_UDP
:
386 case MEMCACHED_CONNECTION_UNIX_SOCKET
: