Updating for 1.0.2 release
[awesomized/libmemcached] / libmemcached / touch.cc
1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
2 *
3 * Libmemcached library
4 *
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 */
37
38 #include <libmemcached/common.h>
39 #include <libmemcached/memcached/protocol_binary.h>
40
41 static memcached_return_t ascii_touch(memcached_server_write_instance_st instance,
42 const char *key, size_t key_length,
43 time_t expiration)
44 {
45 char buffer[21];
46
47 int buffer_length= snprintf(buffer, sizeof(buffer), " %u", uint32_t(expiration));
48 struct libmemcached_io_vector_st vector[]=
49 {
50 { memcached_literal_param("touch ") },
51 { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
52 { key, key_length },
53 { buffer, buffer_length },
54 { memcached_literal_param("\r\n") }
55 };
56
57 memcached_return_t rc;
58 if (memcached_failed(rc= memcached_vdo(instance, vector, 5, true)))
59 {
60 memcached_io_reset(instance);
61 return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
62 }
63
64 return rc;
65 }
66
67 static memcached_return_t binary_touch(memcached_server_write_instance_st instance,
68 const char *key, size_t key_length,
69 time_t expiration)
70 {
71 protocol_binary_request_touch request= {}; //{.bytes= {0}};
72 request.message.header.request.magic= PROTOCOL_BINARY_REQ;
73 request.message.header.request.opcode= PROTOCOL_BINARY_CMD_TOUCH;
74 request.message.header.request.extlen= 4;
75 request.message.header.request.keylen= htons((uint16_t)(key_length +memcached_array_size(instance->root->_namespace)));
76 request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
77 request.message.header.request.bodylen= htonl((uint32_t)(key_length +memcached_array_size(instance->root->_namespace) +request.message.header.request.extlen));
78 request.message.body.expiration= htonl((uint32_t) expiration);
79
80 struct libmemcached_io_vector_st vector[]=
81 {
82 { request.bytes, sizeof(request.bytes) },
83 { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
84 { key, key_length }
85 };
86
87 memcached_return_t rc;
88 if (memcached_failed(rc= memcached_vdo(instance, vector, 3, true)))
89 {
90 memcached_io_reset(instance);
91 return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
92 }
93
94 return rc;
95 }
96
97 memcached_return_t memcached_touch(memcached_st *ptr,
98 const char *key, size_t key_length,
99 time_t expiration)
100 {
101 return memcached_touch_by_key(ptr, key, key_length, key, key_length, expiration);
102 }
103
104 memcached_return_t memcached_touch_by_key(memcached_st *ptr,
105 const char *group_key, size_t group_key_length,
106 const char *key, size_t key_length,
107 time_t expiration)
108 {
109 LIBMEMCACHED_MEMCACHED_TOUCH_START();
110
111 memcached_return_t rc;
112 if (memcached_failed(rc= initialize_query(ptr)))
113 {
114 return rc;
115 }
116
117 if (memcached_failed(rc= memcached_validate_key_length(key_length, ptr->flags.binary_protocol)))
118 {
119 return memcached_set_error(*ptr, rc, MEMCACHED_AT);
120 }
121
122 uint32_t server_key= memcached_generate_hash_with_redistribution(ptr, group_key, group_key_length);
123 memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, server_key);
124
125 if (ptr->flags.binary_protocol)
126 {
127 rc= binary_touch(instance, key, key_length, expiration);
128 }
129 else
130 {
131 rc= ascii_touch(instance, key, key_length, expiration);
132 }
133
134 if (memcached_failed(rc))
135 {
136 return memcached_set_error(*instance, rc, MEMCACHED_AT, memcached_literal_param("Error occcured while writing touch command to server"));
137 }
138
139 char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
140 rc= memcached_read_one_response(instance, buffer, sizeof(buffer), NULL);
141
142 if (rc == MEMCACHED_SUCCESS or rc == MEMCACHED_NOTFOUND)
143 {
144 return rc;
145 }
146
147 return memcached_set_error(*instance, rc, MEMCACHED_AT, memcached_literal_param("Error occcured while reading response"));
148 }