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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38 #include "libmemcached/common.h"
40 memcached_return_t
memcached_delete(memcached_st
*shell
, const char *key
, size_t key_length
,
43 return memcached_delete_by_key(shell
, key
, key_length
, key
, key_length
, expiration
);
46 static inline memcached_return_t
ascii_delete(memcached_instance_st
* instance
,
49 const size_t key_length
,
51 const bool is_buffering
)
53 libmemcached_io_vector_st vector
[]=
56 { memcached_literal_param("delete ") },
57 { memcached_array_string(instance
->root
->_namespace
), memcached_array_size(instance
->root
->_namespace
) },
59 { " noreply", reply
? 0 : memcached_literal_param_size(" noreply") },
60 { memcached_literal_param("\r\n") }
63 /* Send command header, only flush if we are NOT buffering */
64 return memcached_vdo(instance
, vector
, 6, is_buffering
? false : true);
67 static inline memcached_return_t
binary_delete(memcached_instance_st
* instance
,
70 const size_t key_length
,
72 const bool is_buffering
)
74 protocol_binary_request_delete request
= {};
76 bool should_flush
= is_buffering
? false : true;
78 initialize_binary_request(instance
, request
.message
.header
);
82 request
.message
.header
.request
.opcode
= PROTOCOL_BINARY_CMD_DELETE
;
86 request
.message
.header
.request
.opcode
= PROTOCOL_BINARY_CMD_DELETEQ
;
88 request
.message
.header
.request
.keylen
= htons(uint16_t(key_length
+ memcached_array_size(instance
->root
->_namespace
)));
89 request
.message
.header
.request
.datatype
= PROTOCOL_BINARY_RAW_BYTES
;
90 request
.message
.header
.request
.bodylen
= htonl(uint32_t(key_length
+ memcached_array_size(instance
->root
->_namespace
)));
92 libmemcached_io_vector_st vector
[]=
95 { request
.bytes
, sizeof(request
.bytes
) },
96 { memcached_array_string(instance
->root
->_namespace
), memcached_array_size(instance
->root
->_namespace
) },
100 memcached_return_t rc
= memcached_vdo(instance
, vector
, 4, should_flush
);
102 if (memcached_has_replicas(instance
))
104 request
.message
.header
.request
.opcode
= PROTOCOL_BINARY_CMD_DELETEQ
;
106 for (uint32_t x
= 0; x
< memcached_has_replicas(instance
); ++x
)
110 if (server_key
== memcached_server_count(instance
->root
))
115 memcached_instance_st
* replica
= memcached_instance_fetch(instance
->root
, server_key
);
117 if (memcached_success(memcached_vdo(replica
, vector
, 4, should_flush
)))
119 memcached_server_response_decrement(replica
);
127 memcached_return_t
memcached_delete_by_key(memcached_st
*shell
,
128 const char *group_key
, size_t group_key_length
,
129 const char *key
, size_t key_length
,
132 Memcached
* memc
= memcached2Memcached(shell
);
133 LIBMEMCACHED_MEMCACHED_DELETE_START();
135 memcached_return_t rc
;
136 if (memcached_fatal(rc
= initialize_query(memc
, true)))
141 if (memcached_fatal(rc
= memcached_key_test(*memc
, (const char **)&key
, &key_length
, 1)))
143 return memcached_last_error(memc
);
148 return memcached_set_error(*memc
, MEMCACHED_INVALID_ARGUMENTS
, MEMCACHED_AT
,
149 memcached_literal_param("Memcached server version does not allow expiration of deleted items"));
152 uint32_t server_key
= memcached_generate_hash_with_redistribution(memc
, group_key
, group_key_length
);
153 memcached_instance_st
* instance
= memcached_instance_fetch(memc
, server_key
);
155 bool is_buffering
= memcached_is_buffering(instance
->root
);
156 bool is_replying
= memcached_is_replying(instance
->root
);
158 // If a delete trigger exists, we need a response, so no buffering/noreply
159 if (memc
->delete_trigger
)
163 return memcached_set_error(*memc
, MEMCACHED_INVALID_ARGUMENTS
, MEMCACHED_AT
,
164 memcached_literal_param("Delete triggers cannot be used if buffering is enabled"));
167 if (is_replying
== false)
169 return memcached_set_error(*memc
, MEMCACHED_INVALID_ARGUMENTS
, MEMCACHED_AT
,
170 memcached_literal_param("Delete triggers cannot be used if MEMCACHED_BEHAVIOR_NOREPLY is set"));
174 if (memcached_is_binary(memc
))
176 rc
= binary_delete(instance
, server_key
, key
, key_length
, is_replying
, is_buffering
);
180 rc
= ascii_delete(instance
, server_key
, key
, key_length
, is_replying
, is_buffering
);
183 if (rc
== MEMCACHED_SUCCESS
)
185 if (is_buffering
== true)
187 rc
= MEMCACHED_BUFFERED
;
189 else if (is_replying
== false)
191 rc
= MEMCACHED_SUCCESS
;
195 char buffer
[MEMCACHED_DEFAULT_COMMAND_SIZE
];
196 rc
= memcached_response(instance
, buffer
, MEMCACHED_DEFAULT_COMMAND_SIZE
, NULL
);
197 if (rc
== MEMCACHED_DELETED
)
199 rc
= MEMCACHED_SUCCESS
;
200 if (memc
->delete_trigger
)
202 memc
->delete_trigger(memc
, key
, key_length
);
208 LIBMEMCACHED_MEMCACHED_DELETE_END();